From 093f7208842fef174d5f46cddf6bfb25ad271465 Mon Sep 17 00:00:00 2001 From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com> Date: Thu, 2 Jul 2026 17:54:22 +0000 Subject: [PATCH 01/16] Bump the actions group across 1 directory with 8 updates Bumps the actions group with 8 updates in the / directory: | Package | From | To | | --- | --- | --- | | [actions/checkout](https://github.com/actions/checkout) | `4.3.1` | `7.0.0` | | [actions/setup-node](https://github.com/actions/setup-node) | `4.4.0` | `6.4.0` | | [actions/upload-artifact](https://github.com/actions/upload-artifact) | `4.6.2` | `7.0.1` | | [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact) | `3.0.1` | `5.0.0` | | [actions/deploy-pages](https://github.com/actions/deploy-pages) | `4.0.5` | `5.0.0` | | [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) | `4.1.0` | `4.1.1` | | [actions/download-artifact](https://github.com/actions/download-artifact) | `4.3.0` | `8.0.1` | | [azure/login](https://github.com/azure/login) | `2.3.0` | `3.0.0` | Updates `actions/checkout` from 4.3.1 to 7.0.0 - [Release notes](https://github.com/actions/checkout/releases) - [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) - [Commits](https://github.com/actions/checkout/compare/34e114876b0b11c390a56381ad16ebd13914f8d5...9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0) Updates `actions/setup-node` from 4.4.0 to 6.4.0 - [Release notes](https://github.com/actions/setup-node/releases) - [Commits](https://github.com/actions/setup-node/compare/49933ea5288caeca8642d1e84afbd3f7d6820020...48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e) Updates `actions/upload-artifact` from 4.6.2 to 7.0.1 - [Release notes](https://github.com/actions/upload-artifact/releases) - [Commits](https://github.com/actions/upload-artifact/compare/ea165f8d65b6e75b540449e92b4886f43607fa02...043fb46d1a93c77aae656e7c1c64a875d1fc6a0a) Updates `actions/upload-pages-artifact` from 3.0.1 to 5.0.0 - [Release notes](https://github.com/actions/upload-pages-artifact/releases) - [Commits](https://github.com/actions/upload-pages-artifact/compare/56afc609e74202658d3ffba0e8f6dda462b719fa...fc324d3547104276b827a68afc52ff2a11cc49c9) Updates `actions/deploy-pages` from 4.0.5 to 5.0.0 - [Release notes](https://github.com/actions/deploy-pages/releases) - [Commits](https://github.com/actions/deploy-pages/compare/d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e...cd2ce8fcbc39b97be8ca5fce6e763baed58fa128) Updates `actions/attest-build-provenance` from 4.1.0 to 4.1.1 - [Release notes](https://github.com/actions/attest-build-provenance/releases) - [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md) - [Commits](https://github.com/actions/attest-build-provenance/compare/a2bbfa25375fe432b6a289bc6b6cd05ecd0c4c32...0f67c3f4856b2e3261c31976d6725780e5e4c373) Updates `actions/download-artifact` from 4.3.0 to 8.0.1 - [Release notes](https://github.com/actions/download-artifact/releases) - [Commits](https://github.com/actions/download-artifact/compare/d3f86a106a0bac45b974a628896c90dbdf5c8093...3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c) Updates `azure/login` from 2.3.0 to 3.0.0 - [Release notes](https://github.com/azure/login/releases) - [Commits](https://github.com/azure/login/compare/a457da9ea143d694b1b9c7c869ebb04ebe844ef5...532459ea530d8321f2fb9bb10d1e0bcf23869a43) --- updated-dependencies: - dependency-name: actions/checkout dependency-version: 7.0.0 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions - dependency-name: actions/setup-node dependency-version: 6.4.0 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions - dependency-name: actions/upload-artifact dependency-version: 7.0.1 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions - dependency-name: actions/upload-pages-artifact dependency-version: 5.0.0 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions - dependency-name: actions/deploy-pages dependency-version: 5.0.0 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions - dependency-name: actions/attest-build-provenance dependency-version: 4.1.1 dependency-type: direct:production update-type: version-update:semver-patch dependency-group: actions - dependency-name: actions/download-artifact dependency-version: 8.0.1 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions - dependency-name: azure/login dependency-version: 3.0.0 dependency-type: direct:production update-type: version-update:semver-major dependency-group: actions ... Signed-off-by: dependabot[bot] --- .github/workflows/ci.yml | 6 +++--- .github/workflows/deploy-pages.yml | 8 ++++---- .github/workflows/release.yml | 12 ++++++------ 3 files changed, 13 insertions(+), 13 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index da69a3e..ceadf96 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -25,7 +25,7 @@ jobs: # TIMEOUT EXCEPTION: vitest + bundle-size + eslint across 4 workspaces exceeds 10 min on cold npm cache. timeout-minutes: 15 steps: - - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1 + - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0 with: persist-credentials: false # Full history so the change-scope step can diff against the PR base. @@ -62,7 +62,7 @@ jobs: echo "==> Scope: WEB (website/docs-only changes)" fi - - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0 + - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0 with: node-version: 22 cache: npm @@ -112,7 +112,7 @@ jobs: node packages/cli/dist/bin.js --version --json - name: Upload coverage - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2 + uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1 if: always() with: name: coverage-report diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml index 651ac84..4cf882f 100644 --- a/.github/workflows/deploy-pages.yml +++ b/.github/workflows/deploy-pages.yml @@ -26,11 +26,11 @@ jobs: runs-on: ubuntu-latest timeout-minutes: 10 steps: - - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1 + - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0 with: persist-credentials: false - - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0 + - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0 with: node-version: 22 cache: npm @@ -43,7 +43,7 @@ jobs: - name: Build web playground run: npm run -w @typediagram/web build - - uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1 + - uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0 with: path: packages/web/dist @@ -56,4 +56,4 @@ jobs: url: ${{ steps.deployment.outputs.page_url }} steps: - id: deployment - uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5 + uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0 diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 370522c..8b2f190 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -32,11 +32,11 @@ jobs: attestations: write # build-provenance attestations steps: # [SWR-VERSION-BUILD-STAMPING] No ref override — checkout resolves to the pushed tag's SHA. - - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1 + - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0 with: persist-credentials: false - - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0 + - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0 with: node-version: 24 cache: npm @@ -142,7 +142,7 @@ jobs: - name: Attest build provenance continue-on-error: true - uses: actions/attest-build-provenance@a2bbfa25375fe432b6a289bc6b6cd05ecd0c4c32 # v4.1.0 + uses: actions/attest-build-provenance@0f67c3f4856b2e3261c31976d6725780e5e4c373 # v4.1.1 with: subject-path: | typediagram-*.vsix @@ -177,7 +177,7 @@ jobs: # `release` environment so its OIDC subject matches the Entra trust; it # can't share this job's environment, so the VSIX crosses as an artifact. - name: Upload VSIX artifact for Marketplace publish - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2 + uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1 with: name: vsix path: typediagram-*.vsix @@ -201,7 +201,7 @@ jobs: contents: read id-token: write # request the GitHub OIDC token for azure/login steps: - - uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0 + - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1 with: name: vsix path: vsix @@ -209,7 +209,7 @@ jobs: # Exchange the GitHub OIDC token for an Entra session — no client secret, no PAT. # The publisher app holds no Azure subscription role (its only authorization is # Marketplace publisher membership) → allow-no-subscriptions. - - uses: azure/login@a457da9ea143d694b1b9c7c869ebb04ebe844ef5 # v2.3.0 + - uses: azure/login@532459ea530d8321f2fb9bb10d1e0bcf23869a43 # v3.0.0 with: client-id: ${{ secrets.AZURE_CLIENT_ID }} tenant-id: ${{ secrets.AZURE_TENANT_ID }} From c510cb4a0c0bf57bfcbfd72ffa7890ae3ef5bdf4 Mon Sep 17 00:00:00 2001 From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com> Date: Thu, 2 Jul 2026 17:56:28 +0000 Subject: [PATCH 02/16] Bump the npm group across 1 directory with 22 updates Bumps the npm group with 22 updates in the / directory: | Package | From | To | | --- | --- | --- | | [@eslint/js](https://github.com/eslint/eslint/tree/HEAD/packages/js) | `9.39.4` | `10.0.1` | | [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8) | `2.1.9` | `4.1.9` | | [eslint](https://github.com/eslint/eslint) | `9.39.4` | `10.6.0` | | [prettier](https://github.com/prettier/prettier) | `3.8.3` | `3.9.4` | | [typescript-eslint](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/typescript-eslint) | `8.58.2` | `8.62.1` | | [typescript](https://github.com/microsoft/TypeScript) | `5.9.3` | `6.0.3` | | [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) | `2.1.9` | `4.1.9` | | [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) | `22.19.17` | `26.1.0` | | [elkjs](https://github.com/kieler/elkjs) | `0.9.3` | `0.11.1` | | [esbuild](https://github.com/evanw/esbuild) | `0.24.2` | `0.28.1` | | [happy-dom](https://github.com/capricorn86/happy-dom) | `15.11.7` | `20.10.6` | | [markdown-it](https://github.com/markdown-it/markdown-it) | `14.2.0` | `14.3.0` | | [@types/vscode](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/vscode) | `1.116.0` | `1.125.0` | | [@vscode/test-electron](https://github.com/Microsoft/vscode-test) | `2.5.2` | `3.0.0` | | [mocha](https://github.com/mochajs/mocha) | `11.7.5` | `11.7.6` | | [pdfkit](https://github.com/foliojs/pdfkit) | `0.18.0` | `0.19.1` | | [@playwright/test](https://github.com/microsoft/playwright) | `1.59.1` | `1.61.1` | | [concurrently](https://github.com/open-cli-tools/concurrently) | `9.2.1` | `10.0.3` | | [monocart-coverage-reports](https://github.com/cenfun/monocart-coverage-reports) | `2.12.10` | `2.12.12` | | [tsx](https://github.com/privatenumber/tsx) | `4.21.0` | `4.22.5` | | [typedoc-plugin-markdown](https://github.com/typedoc2md/typedoc-plugin-markdown/tree/HEAD/packages/typedoc-plugin-markdown) | `4.11.0` | `4.12.0` | | [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) | `5.4.21` | `8.1.3` | Updates `@eslint/js` from 9.39.4 to 10.0.1 - [Release notes](https://github.com/eslint/eslint/releases) - [Commits](https://github.com/eslint/eslint/commits/v10.0.1/packages/js) Updates `@vitest/coverage-v8` from 2.1.9 to 4.1.9 - [Release notes](https://github.com/vitest-dev/vitest/releases) - [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md) - [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.9/packages/coverage-v8) Updates `eslint` from 9.39.4 to 10.6.0 - [Release notes](https://github.com/eslint/eslint/releases) - [Commits](https://github.com/eslint/eslint/compare/v9.39.4...v10.6.0) Updates `prettier` from 3.8.3 to 3.9.4 - [Release notes](https://github.com/prettier/prettier/releases) - [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md) - [Commits](https://github.com/prettier/prettier/compare/3.8.3...3.9.4) Updates `typescript-eslint` from 8.58.2 to 8.62.1 - [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases) - [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/typescript-eslint/CHANGELOG.md) - [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v8.62.1/packages/typescript-eslint) Updates `typescript` from 5.9.3 to 6.0.3 - [Release notes](https://github.com/microsoft/TypeScript/releases) - [Commits](https://github.com/microsoft/TypeScript/compare/v5.9.3...v6.0.3) Updates `vitest` from 2.1.9 to 4.1.9 - [Release notes](https://github.com/vitest-dev/vitest/releases) - [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md) - [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.9/packages/vitest) Updates `@types/node` from 22.19.17 to 26.1.0 - [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases) - [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node) Updates `elkjs` from 0.9.3 to 0.11.1 - [Release notes](https://github.com/kieler/elkjs/releases) - [Commits](https://github.com/kieler/elkjs/compare/0.9.3...0.11.1) Updates `esbuild` from 0.24.2 to 0.28.1 - [Release notes](https://github.com/evanw/esbuild/releases) - [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG-2024.md) - [Commits](https://github.com/evanw/esbuild/compare/v0.24.2...v0.28.1) Updates `happy-dom` from 15.11.7 to 20.10.6 - [Release notes](https://github.com/capricorn86/happy-dom/releases) - [Commits](https://github.com/capricorn86/happy-dom/compare/v15.11.7...v20.10.6) Updates `markdown-it` from 14.2.0 to 14.3.0 - [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md) - [Commits](https://github.com/markdown-it/markdown-it/compare/14.2.0...14.3.0) Updates `@types/vscode` from 1.116.0 to 1.125.0 - [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases) - [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/vscode) Updates `@vscode/test-electron` from 2.5.2 to 3.0.0 - [Changelog](https://github.com/microsoft/vscode-test/blob/main/CHANGELOG.md) - [Commits](https://github.com/Microsoft/vscode-test/commits) Updates `mocha` from 11.7.5 to 11.7.6 - [Release notes](https://github.com/mochajs/mocha/releases) - [Changelog](https://github.com/mochajs/mocha/blob/v11.7.6/CHANGELOG.md) - [Commits](https://github.com/mochajs/mocha/compare/v11.7.5...v11.7.6) Updates `pdfkit` from 0.18.0 to 0.19.1 - [Release notes](https://github.com/foliojs/pdfkit/releases) - [Changelog](https://github.com/foliojs/pdfkit/blob/master/CHANGELOG.md) - [Commits](https://github.com/foliojs/pdfkit/compare/v0.18.0...v0.19.1) Updates `@playwright/test` from 1.59.1 to 1.61.1 - [Release notes](https://github.com/microsoft/playwright/releases) - [Commits](https://github.com/microsoft/playwright/compare/v1.59.1...v1.61.1) Updates `concurrently` from 9.2.1 to 10.0.3 - [Release notes](https://github.com/open-cli-tools/concurrently/releases) - [Commits](https://github.com/open-cli-tools/concurrently/compare/v9.2.1...v10.0.3) Updates `monocart-coverage-reports` from 2.12.10 to 2.12.12 - [Release notes](https://github.com/cenfun/monocart-coverage-reports/releases) - [Changelog](https://github.com/cenfun/monocart-coverage-reports/blob/main/CHANGELOG.md) - [Commits](https://github.com/cenfun/monocart-coverage-reports/compare/2.12.10...2.12.12) Updates `tsx` from 4.21.0 to 4.22.5 - [Release notes](https://github.com/privatenumber/tsx/releases) - [Changelog](https://github.com/privatenumber/tsx/blob/master/release.config.cjs) - [Commits](https://github.com/privatenumber/tsx/compare/v4.21.0...v4.22.5) Updates `typedoc-plugin-markdown` from 4.11.0 to 4.12.0 - [Release notes](https://github.com/typedoc2md/typedoc-plugin-markdown/releases) - [Changelog](https://github.com/typedoc2md/typedoc-plugin-markdown/blob/main/packages/typedoc-plugin-markdown/CHANGELOG.md) - [Commits](https://github.com/typedoc2md/typedoc-plugin-markdown/commits/typedoc-plugin-markdown@4.12.0/packages/typedoc-plugin-markdown) Updates `vite` from 5.4.21 to 8.1.3 - [Release notes](https://github.com/vitejs/vite/releases) - [Changelog](https://github.com/vitejs/vite/blob/main/packages/vite/CHANGELOG.md) - [Commits](https://github.com/vitejs/vite/commits/v8.1.3/packages/vite) --- updated-dependencies: - dependency-name: "@eslint/js" dependency-version: 10.0.1 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: "@vitest/coverage-v8" dependency-version: 4.1.9 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: eslint dependency-version: 10.6.0 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: prettier dependency-version: 3.9.4 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: typescript-eslint dependency-version: 8.62.1 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: typescript dependency-version: 6.0.3 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: vitest dependency-version: 4.1.9 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: "@types/node" dependency-version: 26.1.0 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: elkjs dependency-version: 0.11.1 dependency-type: direct:production update-type: version-update:semver-minor dependency-group: npm - dependency-name: esbuild dependency-version: 0.28.1 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: happy-dom dependency-version: 20.10.6 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: markdown-it dependency-version: 14.3.0 dependency-type: direct:production update-type: version-update:semver-minor dependency-group: npm - dependency-name: "@types/vscode" dependency-version: 1.125.0 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: "@vscode/test-electron" dependency-version: 3.0.0 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: mocha dependency-version: 11.7.6 dependency-type: direct:development update-type: version-update:semver-patch dependency-group: npm - dependency-name: pdfkit dependency-version: 0.19.1 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: "@playwright/test" dependency-version: 1.61.1 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: concurrently dependency-version: 10.0.3 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm - dependency-name: monocart-coverage-reports dependency-version: 2.12.12 dependency-type: direct:development update-type: version-update:semver-patch dependency-group: npm - dependency-name: tsx dependency-version: 4.22.5 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: typedoc-plugin-markdown dependency-version: 4.12.0 dependency-type: direct:development update-type: version-update:semver-minor dependency-group: npm - dependency-name: vite dependency-version: 8.1.3 dependency-type: direct:development update-type: version-update:semver-major dependency-group: npm ... Signed-off-by: dependabot[bot] --- package-lock.json | 3508 +++++++++++++---------------- package.json | 10 +- packages/cli/package.json | 6 +- packages/typediagram/package.json | 12 +- packages/vscode/package.json | 18 +- packages/web/package.json | 18 +- 6 files changed, 1647 insertions(+), 1925 deletions(-) diff --git a/package-lock.json b/package-lock.json index 500aaf8..be0d9dc 100644 --- a/package-lock.json +++ b/package-lock.json @@ -9,11 +9,11 @@ "packages/*" ], "devDependencies": { - "@eslint/js": "^9.0.0", - "@vitest/coverage-v8": "^2.1.9", - "eslint": "^9.0.0", - "prettier": "^3.0.0", - "typescript-eslint": "^8.0.0" + "@eslint/js": "^10.0.1", + "@vitest/coverage-v8": "^4.1.9", + "eslint": "^10.6.0", + "prettier": "^3.9.4", + "typescript-eslint": "^8.62.1" } }, "node_modules/@11ty/dependency-tree": { @@ -245,24 +245,10 @@ "node": "*" } }, - "node_modules/@ampproject/remapping": { - "version": "2.3.0", - "resolved": 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], @@ -8139,9 +7782,9 @@ } }, "packages/vscode/node_modules/@esbuild/win32-arm64": { - "version": "0.24.2", - "resolved": "https://registry.npmjs.org/@esbuild/win32-arm64/-/win32-arm64-0.24.2.tgz", - "integrity": "sha512-LihEQ2BBKVFLOC9ZItT9iFprsE9tqjDjnbulhHoFxYQtQfai7qfluVODIYxt1PgdoyQkz23+01rzwNwYfutxUQ==", + "version": "0.28.1", + "resolved": "https://registry.npmjs.org/@esbuild/win32-arm64/-/win32-arm64-0.28.1.tgz", + "integrity": "sha512-lCv9eK/H6ZJWbE7bh2nw54CZ9M2nupBxJcTsdk/QQnWkdSjKGuxmmH8/GWrlT1eMmZfn4dGcCjRte397WqfQXA==", "cpu": [ "arm64" ], @@ -8156,9 +7799,9 @@ } }, "packages/vscode/node_modules/@esbuild/win32-ia32": { - "version": "0.24.2", - "resolved": "https://registry.npmjs.org/@esbuild/win32-ia32/-/win32-ia32-0.24.2.tgz", - "integrity": "sha512-q+iGUwfs8tncmFC9pcnD5IvRHAzmbwQ3GPS5/ceCyHdjXubwQWI12MKWSNSMYLJMq23/IUCvJMS76PDqXe1fxA==", + "version": "0.28.1", + "resolved": "https://registry.npmjs.org/@esbuild/win32-ia32/-/win32-ia32-0.28.1.tgz", + "integrity": 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"@vitejs/devtools": { + "optional": true + }, + "esbuild": { + "optional": true + }, + "jiti": { + "optional": true + }, + "less": { + "optional": true + }, + "sass": { + "optional": true + }, + "sass-embedded": { + "optional": true + }, + "stylus": { + "optional": true + }, + "sugarss": { + "optional": true + }, + "terser": { + "optional": true + }, + "tsx": { + "optional": true + }, + "yaml": { + "optional": true + } } } } diff --git a/package.json b/package.json index 8055716..67cdc8a 100644 --- a/package.json +++ b/package.json @@ -14,10 +14,10 @@ "fmt:check": "prettier --check ." }, "devDependencies": { - "@eslint/js": "^9.0.0", - "@vitest/coverage-v8": "^2.1.9", - "eslint": "^9.0.0", - "prettier": "^3.0.0", - "typescript-eslint": "^8.0.0" + "@eslint/js": "^10.0.1", + "@vitest/coverage-v8": "^4.1.9", + "eslint": "^10.6.0", + "prettier": "^3.9.4", + "typescript-eslint": "^8.62.1" } } diff --git a/packages/cli/package.json b/packages/cli/package.json index 9e19562..9112a8e 100644 --- a/packages/cli/package.json +++ b/packages/cli/package.json @@ -27,8 +27,8 @@ "typediagram-core": "0.9.0" }, "devDependencies": { - "typescript": "^5.6.0", - "vitest": "^2.1.0", - "@types/node": "^22.0.0" + "typescript": "^6.0.3", + "vitest": "^4.1.9", + "@types/node": "^26.1.0" } } diff --git a/packages/typediagram/package.json b/packages/typediagram/package.json index 62d8d18..0d0d016 100644 --- a/packages/typediagram/package.json +++ b/packages/typediagram/package.json @@ -52,13 +52,13 @@ "check": "npm run check-banned-deps && npm run typecheck && npm run test" }, "dependencies": { - "elkjs": "^0.9.3" + "elkjs": "^0.11.1" }, "devDependencies": { - "esbuild": "^0.24.0", - "typescript": "^5.6.0", - "vitest": "^2.1.0", - "@types/node": "^22.0.0", - "happy-dom": "^15.0.0" + "esbuild": "^0.28.1", + "typescript": "^6.0.3", + "vitest": "^4.1.9", + "@types/node": "^26.1.0", + "happy-dom": "^20.10.6" } } diff --git a/packages/vscode/package.json b/packages/vscode/package.json index c69b304..80c7571 100644 --- a/packages/vscode/package.json +++ b/packages/vscode/package.json @@ -158,22 +158,22 @@ "package": "node package-vsix.mjs" }, "dependencies": { - "markdown-it": "^14.1.0", + "markdown-it": "^14.3.0", "typediagram-core": "0.9.0" }, "devDependencies": { "@types/markdown-it": "^14.1.2", "@types/mocha": "^10.0.10", - "@types/node": "^22.0.0", + "@types/node": "^26.1.0", "@types/pdfkit": "^0.17.6", - "@types/vscode": "^1.99.0", - "@vscode/test-electron": "^2.5.2", - "esbuild": "^0.24.0", - "mocha": "^11.7.5", - "pdfkit": "^0.18.0", + "@types/vscode": "^1.125.0", + "@vscode/test-electron": "^3.0.0", + "esbuild": "^0.28.1", + "mocha": "^11.7.6", + "pdfkit": "^0.19.1", "svg-to-pdfkit": "^0.1.8", - "typescript": "^5.6.0", - "vitest": "^2.1.0", + "typescript": "^6.0.3", + "vitest": "^4.1.9", "vscode-oniguruma": "^2.0.1", "vscode-textmate": "^9.1.0" } diff --git a/packages/web/package.json b/packages/web/package.json index 7076788..ac1d760 100644 --- a/packages/web/package.json +++ b/packages/web/package.json @@ -26,17 +26,17 @@ }, "devDependencies": { "@11ty/eleventy": "^3.1.6", - "@playwright/test": "^1.59.1", + "@playwright/test": "^1.61.1", "@types/prismjs": "^1.26.6", - "concurrently": "^9.2.1", - "happy-dom": "^15.0.0", - "monocart-coverage-reports": "^2.12.10", + "concurrently": "^10.0.3", + "happy-dom": "^20.10.6", + "monocart-coverage-reports": "^2.12.12", "prismjs": "^1.30.0", - "tsx": "^4.21.0", + "tsx": "^4.22.5", "typedoc": "^0.28.19", - "typedoc-plugin-markdown": "^4.11.0", - "typescript": "^5.6.0", - "vite": "^5.4.0", - "vitest": "^2.1.0" + "typedoc-plugin-markdown": "^4.12.0", + "typescript": "^6.0.3", + "vite": "^8.1.3", + "vitest": "^4.1.9" } } From e64db2197361059223c088477feeebdf98200f48 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 18:07:41 +1000 Subject: [PATCH 03/16] Agent pmo --- .claude/settings.local.json | 9 ++ .deslop.toml | 15 +++ .devcontainer/devcontainer.json | 10 +- .github/dependabot.yml | 54 +++++++- .github/workflows/ci.yml | 20 ++- .github/workflows/codeql.yml | 150 +++++++++++++++++++++ .github/workflows/dependabot-automerge.yml | 83 ++++++++++++ .github/workflows/deploy-pages.yml | 8 +- .github/workflows/release.yml | 19 ++- .gitignore | 10 +- Cargo.toml | 59 ++++++++ Claude.md | 23 +++- SECURITY.md | 39 ++++++ crates/README.md | 21 +++ package-lock.json | 98 +++++++++----- packages/cli/package.json | 4 +- packages/typediagram/package.json | 2 +- packages/vscode/package.json | 4 +- packages/web/package.json | 4 +- rustfmt.toml | 12 ++ shipwright.json | 4 +- 21 files changed, 590 insertions(+), 58 deletions(-) create mode 100644 .claude/settings.local.json create mode 100644 .deslop.toml create mode 100644 .github/workflows/codeql.yml create mode 100644 .github/workflows/dependabot-automerge.yml create mode 100644 Cargo.toml create mode 100644 SECURITY.md create mode 100644 crates/README.md create mode 100644 rustfmt.toml diff --git a/.claude/settings.local.json b/.claude/settings.local.json new file mode 100644 index 0000000..465b714 --- /dev/null +++ b/.claude/settings.local.json @@ -0,0 +1,9 @@ +{ + "permissions": { + "allow": [ + "Bash(rm -rf ~/.vscode/extensions/nimblesite.typediagram-0.1.0 ~/.vscode/extensions/nimblesite.typediagram-0.3.0)", + "Read(//Users/christianfindlay/.vscode/extensions/**)" + ] + }, + "autoMemoryEnabled": false +} \ No newline at end of file diff --git a/.deslop.toml b/.deslop.toml new file mode 100644 index 0000000..79ea98b --- /dev/null +++ b/.deslop.toml @@ -0,0 +1,15 @@ +# agent-pmo:372ce7f +# Deslop duplication gate — REPO-STANDARDS-SPEC [CI-DESLOP]. +# Single source of truth for this repo's duplication budget. Committed, PR-reviewed, +# ratcheted DOWN only (never up without written justification). +# CI runs `deslop .`, which reads this file and exits 3 (tanking the build) when +# measured repo-wide duplication exceeds the value below. +# Docs: https://deslop.live/docs/for-ai/ +# +# MEASURED, not guessed: the live Deslop report put repo-wide duplication at +# 21.33% at setup time (Deslop scans this repo's TypeScript + the incoming Rust). +# The ceiling below is that value plus a small jitter buffer. The bulk of it is +# table-style test data in packages/typediagram/test/converters/*.test.ts — drive +# this number DOWN as that is de-duplicated; never raise it. +[threshold] +max_duplication_percent = 21.5 diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json index 6979ee9..8a896cc 100644 --- a/.devcontainer/devcontainer.json +++ b/.devcontainer/devcontainer.json @@ -1,7 +1,10 @@ { - "_agent_pmo": "b636503", - "name": "typeDiagram (Node.js)", + "_agent_pmo": "372ce7f", + "name": "typeDiagram (Node.js + Rust)", "image": "mcr.microsoft.com/devcontainers/typescript-node:1-22", + "features": { + "ghcr.io/devcontainers/features/rust:1": {} + }, "remoteUser": "vscode", "postCreateCommand": "make setup", "customizations": { @@ -10,7 +13,8 @@ "dbaeumer.vscode-eslint", "esbenp.prettier-vscode", "usernamehw.errorlens", - "ms-vscode.vscode-typescript-next" + "ms-vscode.vscode-typescript-next", + "rust-lang.rust-analyzer" ], "settings": { "editor.formatOnSave": true, diff --git a/.github/dependabot.yml b/.github/dependabot.yml index 761b368..998e108 100644 --- a/.github/dependabot.yml +++ b/.github/dependabot.yml @@ -1,18 +1,66 @@ -# [SWR-SEC-ACTION-PINNING] Keeps SHA-pinned actions and npm deps fresh. -# Grouped so each ecosystem opens ONE combined PR per run. +# agent-pmo:372ce7f +# Dependabot — every bump routed to the long-lived `dependabot-upgrades` STAGING +# branch, never straight to main ([GITHUB-DEPENDABOT]). +# +# * VERSION updates -> `target-branch: dependabot-upgrades`. The bump PR opens +# against staging; ci.yml / codeql.yml only trigger on `pull_request: [main]` +# (matched on the PR *base*), so staging PRs run NO build/test/CodeQL. +# * SECURITY updates -> GitHub IGNORES `target-branch` and always opens them +# against `main`; .github/workflows/dependabot-automerge.yml catches them there +# and folds them into the SAME staging branch, then retires the PR. +# * groups -> each ecosystem collapses ALL bump types (patch+minor+major) +# into ONE PR; a parallel `*-security` group does the same for CVE bumps. +# +# The whole batch reaches main via ONE `dependabot-upgrades -> main` consolidation +# PR, where CI + CodeQL run exactly once. +# +# REQUIREMENT: the `dependabot-upgrades` branch must exist and stay UNPROTECTED, +# cut from main AFTER this file + dependabot-automerge.yml are on main. version: 2 + updates: + # GitHub Actions — applies to every repo with workflows. Version-only (no + # Dependabot advisory channel for actions). Pinned SHAs are a supply-chain target. - package-ecosystem: github-actions directory: / + target-branch: "dependabot-upgrades" schedule: interval: weekly + open-pull-requests-limit: 5 + labels: ["dependencies"] groups: - actions: + github-actions: patterns: ["*"] + + # npm / Node — package.json (root workspaces + packages/*) - package-ecosystem: npm directory: / + target-branch: "dependabot-upgrades" schedule: interval: weekly + open-pull-requests-limit: 5 + labels: ["dependencies"] groups: npm: + applies-to: version-updates + patterns: ["*"] + npm-security: + applies-to: security-updates + patterns: ["*"] + + # Cargo / Rust — the incoming Rust workspace (crates/*). Active once a crate with + # dependencies lands; harmless before then. + - package-ecosystem: cargo + directory: / + target-branch: "dependabot-upgrades" + schedule: + interval: weekly + open-pull-requests-limit: 5 + labels: ["dependencies"] + groups: + cargo: + applies-to: version-updates + patterns: ["*"] + cargo-security: + applies-to: security-updates patterns: ["*"] diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index ceadf96..41a29a8 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -1,4 +1,4 @@ -# agent-pmo:b636503 +# agent-pmo:372ce7f name: CI on: @@ -21,6 +21,11 @@ defaults: jobs: ci: name: CI + # Dependabot PRs are swept into `dependabot-upgrades` by dependabot-automerge.yml + # and never merge to main directly, so CI would only burn minutes on a bump we + # discard. CI runs once, on the `dependabot-upgrades -> main` consolidation PR. + # ([GITHUB-DEPENDABOT]) + if: github.actor != 'dependabot[bot]' runs-on: ubuntu-latest # TIMEOUT EXCEPTION: vitest + bundle-size + eslint across 4 workspaces exceeds 10 min on cold npm cache. timeout-minutes: 15 @@ -102,6 +107,19 @@ jobs: if: steps.scope.outputs.scope == 'full' run: make ci + # Deslop duplication gate ([CI-DESLOP]). Threshold lives in committed + # .deslop.toml — ratcheted DOWN only. `deslop .` reads it and exits 3 (tanks + # the build) when repo-wide duplication exceeds it. Full scope only (web/docs + # PRs touch no Deslop-scanned source). + - name: Deslop duplication gate + if: steps.scope.outputs.scope == 'full' + env: + DESLOP_VERSION: "0.5.1" # pin — https://github.com/Nimblesite/Deslop/releases + run: | + curl -sSfL "https://github.com/Nimblesite/Deslop/releases/download/v${DESLOP_VERSION}/deslop-${DESLOP_VERSION}-linux-x64.tar.gz" | tar -xz + echo "$PWD/deslop-${DESLOP_VERSION}-linux-x64" >> "$GITHUB_PATH" + deslop . + # [SWR-GATE-CI] [SWR-GATE-VERIFY-BINARIES] manifest + CLI version contract. - name: Shipwright acceptance gates if: steps.scope.outputs.scope == 'full' diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml new file mode 100644 index 0000000..91d8658 --- /dev/null +++ b/.github/workflows/codeql.yml @@ -0,0 +1,150 @@ +# agent-pmo:372ce7f +name: CodeQL + +# CodeQL static security analysis ([GITHUB-CODE-SCANNING]). +# +# SEPARATE from ci.yml on purpose: CodeQL feeds GitHub code-scanning alerts and +# needs `security-events: write` + a weekly schedule, while ci.yml owns +# lint/test/build. It does NOT overlap with `make lint` (style/correctness) or +# the `npm audit` vuln-gate (vulnerable packages) — CodeQL finds vulnerable CODE. +# Never add security-rule linter plugins that re-cover CodeQL: no doubling up. +# +# Matrix = (languages in this repo) ∩ (CodeQL-supported at skill-run time): +# javascript-typescript — the packages/* monorepo (core, cli, web, vscode) +# rust — the incoming crates/* workspace (build-mode: none) +# actions — always, scans the workflow files themselves +# Action SHAs are kept current by the github-actions Dependabot group. +on: + pull_request: + branches: [main] + schedule: + # Weekly, so newly-published CodeQL queries re-scan even without a push. + - cron: "27 4 * * 1" + # release.yml calls this with gate=true on every v* tag to scan the exact + # released SHA with the current query set and BLOCK publishing on any + # High/Critical finding. The PR scan covers the diff, the weekly scan covers + # query drift, the gated call covers the released commit itself — as a HARD + # gate, not advice: a finding FAILS the release. This replaces the old + # standalone `push: [tags]` scan, which could only file alerts AFTER the + # artifact had already shipped — useless as a gate. [GITHUB-CODE-SCANNING] + workflow_call: + inputs: + gate: + description: >- + When true (release calls), fail the job on any High/Critical finding so + the calling release workflow cannot publish. PR/weekly runs leave this + false and stay advisory (the PR check-failure threshold governs merges). + type: boolean + default: false + +permissions: + contents: read + +concurrency: + group: codeql-${{ github.ref }} + cancel-in-progress: true + +jobs: + analyze: + name: Analyze (${{ matrix.language }}) + runs-on: ubuntu-latest + timeout-minutes: 20 + # Code scanning (SARIF upload) requires GitHub Advanced Security on PRIVATE + # repos. Gating on public visibility lets a private repo skip cleanly (no red + # X) and self-enable the moment it is made public — no follow-up edit needed. + # Dependabot PRs are excluded: they are swept into `dependabot-upgrades` by + # dependabot-automerge.yml and never merge to main directly, so scanning them + # only burns the matrix on a bump we discard — CodeQL runs on the + # consolidation PR instead. ([GITHUB-DEPENDABOT]) + if: github.event.repository.visibility == 'public' && github.actor != 'dependabot[bot]' + permissions: + security-events: write + actions: read + contents: read + strategy: + fail-fast: false + matrix: + # (repo language ∩ CodeQL-supported at runtime). `build-mode: none` suits + # interpreted langs + rust; it avoids re-compiling what ci already builds. + include: + - language: actions # scans the workflow files themselves + build-mode: none + - language: javascript-typescript + build-mode: none + - language: rust + build-mode: none + steps: + - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3 + - name: Initialize CodeQL + uses: github/codeql-action/init@8aad20d150bbac5944a9f9d289da16a4b0d87c1e # v4.36.2 + with: + languages: ${{ matrix.language }} + build-mode: ${{ matrix.build-mode }} + queries: security-extended + - name: Perform CodeQL analysis + uses: github/codeql-action/analyze@8aad20d150bbac5944a9f9d289da16a4b0d87c1e # v4.36.2 + with: + category: "/language:${{ matrix.language }}" + # Drop SARIF on disk so the gate step can read it. `upload` stays on + # (default) so alerts still post to code scanning on every run. + output: sarif-results + # Release gate. `security-severity` is the 0-10 CVSS-style score CodeQL + # attaches to each security rule; >= 7.0 == High or Critical. Enforced ONLY + # on gated (release) calls — PR/weekly runs skip this and stay advisory. + # Caveat: this reads freshly produced SARIF, which does NOT reflect alert + # dismissals — a dismissed false positive re-blocks until excluded via a + # CodeQL config. FAILS CLOSED: missing/malformed SARIF errors, never passes. + # [GITHUB-CODE-SCANNING] + - name: Enforce no high/critical findings (release gate) + if: inputs.gate + shell: bash + env: + SARIF_DIR: sarif-results + SEVERITY_THRESHOLD: '7.0' + run: |- + set -euo pipefail + shopt -s nullglob + # Fail closed: no SARIF means we cannot prove the code is clean. + sarifs=( "${SARIF_DIR}"/*.sarif ) + if [ "${#sarifs[@]}" -eq 0 ]; then + echo "::error::CodeQL gate: no SARIF in ${SARIF_DIR}; cannot verify findings — failing closed." + exit 1 + fi + offenders=0 + for sarif in "${sarifs[@]}"; do + if ! jq -e '.runs' "${sarif}" >/dev/null 2>&1; then + echo "::error::CodeQL gate: ${sarif} is not valid SARIF (no .runs) — failing closed." + exit 1 + fi + # Observability: a clean scan logs results=0 with a non-zero + # severity_rules count, proving real SARIF was parsed. + jq -r --arg f "${sarif##*/}" ' + ([ (.runs[].tool.driver.rules // [])[], + (.runs[].tool.extensions[]?.rules // [])[] ]) as $rules + | "CodeQL gate: \($f): results=\([.runs[].results[]?]|length) severity_rules=\([$rules[]|select(.properties["security-severity"])]|length)" + ' "${sarif}" + # CodeQL puts query rules in tool.extensions[].rules (driver.rules is + # empty in CodeQL output); union both, then keep results >= threshold. + hits="$(jq -r --argjson t "${SEVERITY_THRESHOLD}" ' + .runs[] + | ( [ (.tool.driver.rules // [])[], + (.tool.extensions[]?.rules // [])[] ] + | map({ key: .id, + value: ((.properties["security-severity"] // "0") | tonumber) }) + | from_entries + ) as $severity + | .results[] + | select( ($severity[.ruleId] // 0) >= $t ) + | .ruleId + ' "${sarif}" | sort | uniq -c | sort -rn)" + if [ -n "${hits}" ]; then + echo "::error::High/critical CodeQL findings in ${sarif}:" + echo "${hits}" + offenders=$((offenders + 1)) + fi + done + if [ "${offenders}" -gt 0 ]; then + echo "::error::CodeQL gate failed — release blocked. Fix or dismiss-and-exclude the findings, then re-tag." + exit 1 + fi + echo "CodeQL gate passed: nothing at or above severity ${SEVERITY_THRESHOLD}." diff --git a/.github/workflows/dependabot-automerge.yml b/.github/workflows/dependabot-automerge.yml new file mode 100644 index 0000000..ae7a2ec --- /dev/null +++ b/.github/workflows/dependabot-automerge.yml @@ -0,0 +1,83 @@ +# agent-pmo:372ce7f +name: Dependabot auto-merge + +# Sweeps EVERY Dependabot PR into the long-lived `dependabot-upgrades` staging +# branch, no questions asked ([GITHUB-DEPENDABOT]). Two kinds of PR land here: +# +# * VERSION updates -> Dependabot opens them against `dependabot-upgrades` +# directly (.github/dependabot.yml `target-branch`). +# * SECURITY updates -> GitHub IGNORES `target-branch` for these and ALWAYS +# opens them against the default branch (`main`). So this workflow also +# triggers on `main` and folds the security bump into the SAME staging +# branch — nothing is ever left sitting on `main` waiting for a human. +# +# Merge strategy: the incoming branch ALWAYS clobbers what is already staged +# (`git merge -X theirs`). Successive bumps of the same lock-file never conflict- +# stall: the latest bump wins, every time. Nothing reaches `main` this way — the +# full build/test (ci.yml) + CodeQL (codeql.yml) gate the single +# `dependabot-upgrades -> main` consolidation PR, which is where review and the +# expensive matrix actually run. ci.yml/codeql.yml deliberately SKIP Dependabot +# PRs (they would only burn the matrix on a bump we immediately sweep away). +# +# Lives at the repo root so it is present on `dependabot-upgrades` (cut from +# main): for `pull_request` the workflow is read from the PR's base branch, so +# BOTH `main` and the staging branch must carry this file. +on: + pull_request: + branches: + - dependabot-upgrades + - main + +permissions: + contents: write + pull-requests: write + +jobs: + sweep: + name: Clobber-merge into dependabot-upgrades + if: github.actor == 'dependabot[bot]' + # Deliberately the standard runner, NOT a larger/paid one: a trivial merge + # bot must not consume CI minutes meant for the real build matrix. + runs-on: ubuntu-latest + timeout-minutes: 5 + steps: + - name: Check out the staging branch + uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3 + with: + ref: dependabot-upgrades + fetch-depth: 0 + + - name: Clobber-merge the bump and retire the PR + env: + PR_URL: ${{ github.event.pull_request.html_url }} + PR_HEAD: ${{ github.event.pull_request.head.ref }} + GH_TOKEN: ${{ secrets.GITHUB_TOKEN }} + run: | + set -euo pipefail + git config user.name "github-actions[bot]" + git config user.email "41898282+github-actions[bot]@users.noreply.github.com" + # Pull the bump branch into a stable local ref we can re-merge. + git fetch origin "+refs/heads/${PR_HEAD}:refs/remotes/origin/${PR_HEAD}" + # Re-merge onto the LIVE staging tip and retry: concurrent Dependabot + # PRs race to push here, so each run rebases on whatever already landed + # and the incoming branch always wins conflicts (-X theirs). + for attempt in 1 2 3 4 5; do + git fetch origin "+refs/heads/dependabot-upgrades:refs/remotes/origin/dependabot-upgrades" + git reset --hard "origin/dependabot-upgrades" + git merge -X theirs --no-edit "origin/${PR_HEAD}" \ + -m "build(deps): clobber-merge ${PR_HEAD} into dependabot-upgrades" + if git push origin "HEAD:dependabot-upgrades"; then + break + fi + if [ "$attempt" = "5" ]; then + echo "::error::could not push to dependabot-upgrades after 5 attempts" + exit 1 + fi + sleep 5 + done + # Retire the PR + its branch: the bump is already staged, so the PR + # (whether it targeted main or the staging branch) has served its + # purpose. `|| true` — GitHub may have auto-closed it on the push. + gh pr close "$PR_URL" --delete-branch \ + --comment "Swept into \`dependabot-upgrades\` (latest bump clobbers previous)." \ + || git push origin --delete "$PR_HEAD" || true diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml index 4cf882f..e6e6ccc 100644 --- a/.github/workflows/deploy-pages.yml +++ b/.github/workflows/deploy-pages.yml @@ -1,4 +1,4 @@ -# agent-pmo:b636503 +# agent-pmo:372ce7f name: Deploy to GitHub Pages on: @@ -26,8 +26,14 @@ jobs: runs-on: ubuntu-latest timeout-minutes: 10 steps: + # [SWR-REL-WORKFLOW] Deploy the website at the RELEASE ref, not main. A + # workflow_run event checks out the default branch by default, which would + # publish whatever landed on main after the tag; head_sha is the exact commit + # the Release run built (the tagged SHA). On workflow_dispatch head_sha is + # empty, so checkout falls back to the dispatched ref. - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0 with: + ref: ${{ github.event.workflow_run.head_sha }} persist-credentials: false - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0 diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 8b2f190..8146de8 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -1,4 +1,4 @@ -# agent-pmo:b636503 +# agent-pmo:372ce7f name: Release # [SWR-REL-WORKFLOW] Tag-triggered only. Builds the EXACT tagged SHA; the version is @@ -20,8 +20,23 @@ concurrency: cancel-in-progress: true jobs: + # [GITHUB-CODE-SCANNING] Hard CodeQL release gate. `gate: true` makes the reusable + # workflow fail on any High/Critical finding; every publish job `needs:` this job, + # so a finding blocks the GitHub Release, both npm publishes, and the Marketplace + # publish. See REPO-STANDARDS-SPEC [GITHUB-CODE-SCANNING]. + codeql: + name: CodeQL + permissions: + security-events: write + actions: read + contents: read + uses: ./.github/workflows/codeql.yml + with: + gate: true + release: name: Release + needs: codeql runs-on: ubuntu-latest # TIMEOUT EXCEPTION: lint gate + dual npm publish + VSIX packaging exceeds 10 min on cold npm cache. timeout-minutes: 20 @@ -193,7 +208,7 @@ jobs: # fails this job and turns the release red. publish-marketplace: name: Publish VSIX to VS Code Marketplace - needs: release + needs: [release, codeql] runs-on: ubuntu-latest timeout-minutes: 10 environment: release diff --git a/.gitignore b/.gitignore index 710bb31..27098bd 100644 --- a/.gitignore +++ b/.gitignore @@ -1,4 +1,4 @@ -# agent-pmo:b636503 +# agent-pmo:372ce7f # ============================================================================= # UNIVERSAL # ============================================================================= @@ -88,3 +88,11 @@ packages/web/test-results/ .ghissues/ .vscode/code-navigator/ + +# ============================================================================= +# RUST (workspace under crates/ — REPO-STANDARDS-SPEC [GITIGNORE-LANG]) +# ============================================================================= +/target/ +**/*.rs.bk +# Cargo.lock IS committed on purpose — this workspace produces a binary (CLI). +# Do NOT add Cargo.lock here. diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..343701e --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,59 @@ +# agent-pmo:372ce7f +# Rust workspace for typeDiagram — REPO-STANDARDS-SPEC [LINT-RUST]. +# +# Crates live under `crates/` and inherit the strict lint table below by adding +# +# [lints] +# workspace = true +# +# to their own Cargo.toml. Turn ALL lints on and up to `deny`; the only sanctioned +# exceptions are the documented ones below. `make fmt`/`make lint`/`make test` +# gain `cargo fmt`/`cargo clippy`/`cargo llvm-cov` steps once the first crate lands. +# +# NOTE: until the first crate is added under `crates/`, `cargo build` reports an +# empty workspace — expected while Rust is being introduced. +[workspace] +resolver = "2" +members = ["crates/*"] + +[workspace.package] +edition = "2021" +license = "MIT" +repository = "https://github.com/MelbourneDeveloper/type_diagram" + +[workspace.lints.rust] +unsafe_code = "deny" +missing_docs = "deny" +missing_debug_implementations = "deny" +unused_imports = "deny" +dead_code = "deny" +unused_variables = "deny" +unused_mut = "deny" +unused_assignments = "deny" +unused_results = "deny" +trivial_casts = "deny" +trivial_numeric_casts = "deny" +elided_lifetimes_in_paths = "deny" +future_incompatible = { level = "deny", priority = -1 } +nonstandard_style = { level = "deny", priority = -1 } +rust_2018_idioms = { level = "deny", priority = -1 } + +[workspace.lints.clippy] +all = { level = "deny", priority = -1 } +pedantic = { level = "deny", priority = -1 } +unwrap_used = "deny" +expect_used = "deny" +panic = "deny" +todo = "deny" +unimplemented = "deny" +unreachable = "deny" +indexing_slicing = "deny" +arithmetic_side_effects = "deny" +missing_docs_in_private_items = "deny" + +# NOTE: `float_arithmetic = "deny"` is INTENTIONALLY NOT enabled here. It is right +# for a narrow class of repos (crypto, consensus, money, reproducible hashing) +# where IEEE-754 non-associativity is a correctness hazard, but too aggressive for +# general-purpose code (scoring, stats, geometry, layout math — typeDiagram's SVG +# layout is exactly this). If a specific crate needs bit-exact float-free math, add +# `#![deny(clippy::float_arithmetic)]` at that crate's root — do NOT promote it here. diff --git a/Claude.md b/Claude.md index b2385b1..96004b2 100644 --- a/Claude.md +++ b/Claude.md @@ -2,7 +2,7 @@ Read this file in full. Rules below are NON-NEGOTIABLE — violations are rejected in review. - + ⚠️ **TOKEN ECONOMICS DISCIPLINE.** Check file size first. `Grep` over `Read`. Use `offset`/`limit`. Smallest diff that solves the problem. Delete dead code, unused imports, stale comments. @@ -17,6 +17,8 @@ Call out irrelevant context before proceeding. Bloat degrades reasoning. ⚠️ typeDiagram is a small DSL for diagramming algebraic data types (records + tagged unions). Language-neutral, no methods. Includes a parser, model, layout engine, SVG renderer, and markdown support. Ships as an npm library, CLI tool, VS Code extension, and web playground. +A **Rust workspace** under `crates/` (root `Cargo.toml`) is being introduced alongside the TypeScript monorepo. It is a multi-language repo: TypeScript config and Rust config are chained orthogonally, never merged. + ## Testing Rules ### Bulk of tests @@ -67,6 +69,25 @@ typeDiagram is a small DSL for diagramming algebraic data types (records + tagge - `tsconfig.json` MUST have `"strict": true`. - No throwing — return `Result` (library or discriminated union). +## Hard Rules — Rust + +Rust lives in the `crates/` workspace. Lints: `[workspace.lints]` in the root `Cargo.toml` (REPO-STANDARDS-SPEC [LINT-RUST]); formatting: `rustfmt.toml` ([LINT-RUST-FMT]). + +- **Every crate inherits the workspace lints** — add `[lints]` / `workspace = true` to its `Cargo.toml`. +- **All lints ON and at `deny`.** `unsafe_code = "deny"`; clippy `all` + `pedantic` denied. +- **No panics in library code.** `unwrap`, `expect`, `panic!`, `todo!`, `unimplemented!`, `unreachable!`, `indexing_slicing`, `arithmetic_side_effects` are all denied — return `Result`, index via `.get()`. +- **No lint suppressions.** No `#[allow(...)]` without a documented, reviewed reason. Fix the code. +- **Public items documented** (`missing_docs = "deny"`). Structured logging via `tracing` — never `println!`. +- **Format with `cargo fmt`.** Once the first crate lands, `make fmt`/`lint`/`test` gain `cargo fmt`/`cargo clippy -D warnings`/`cargo llvm-cov`. + +## Duplication — Deslop (MANDATORY MCP loop) + +Duplication is debt with a ratcheted budget in `.deslop.toml` (REPO-STANDARDS-SPEC [CI-DESLOP]); CI runs `deslop .` and fails when the repo exceeds it. Deslop scans this repo's TypeScript today and the Rust under `crates/`. Use its MCP tools: + +- **BEFORE** authoring any function, helper, fixture, or test setup → call `find-similar`. `signals.fused ≥ 0.85` or an `identical`/`nearly_identical` bucket → REUSE the existing code, do not duplicate; `0.6 ≤ fused < 0.85` → review the canonical occurrence and bias toward reuse. +- **AFTER** changing code → `rescan`, then `top-offenders` / `cluster-by-id`; `report-for-file` / `report-for-range` for a file or selection; `schema-doc` once per session. +- **NEVER** silence findings by widening the threshold, marking code hidden, or splitting it into trivially different shapes. `max_duplication_percent` only ratchets DOWN. + ## CSS Budget CSS BUDGET = 2k LOC - HARD CEILING. diff --git a/SECURITY.md b/SECURITY.md new file mode 100644 index 0000000..c76e420 --- /dev/null +++ b/SECURITY.md @@ -0,0 +1,39 @@ +# Security Policy + + + +## Reporting a Vulnerability + +**Please do not report security vulnerabilities through public GitHub issues, +discussions, or pull requests.** + +Report privately through GitHub's **private vulnerability reporting**: go to the +repository's **Security** tab → **Report a vulnerability** (or +`https://github.com/MelbourneDeveloper/type_diagram/security/advisories/new`). This opens a +private, structured advisory only the maintainers can see. + +If you cannot use that channel, email **cftools@nimblesite.co**. + +When reporting, please include: + +- The type of issue (e.g. injection, path traversal, auth bypass, secret exposure). +- The affected version(s), file(s), and any relevant configuration. +- Steps to reproduce, ideally a minimal proof of concept. +- The impact: what an attacker can achieve. + +## What to Expect + +- **Acknowledgement** within **3 business days**. +- An assessment and a remediation plan (or a reasoned decline) within **10 business days**. +- Coordinated disclosure: we will agree a disclosure timeline with you and credit + you in the advisory unless you prefer to remain anonymous. + +## Supported Versions + +Security fixes land on the latest released minor version. Older lines are +supported only as noted below. + +| Version | Supported | +| ------- | --------- | +| 0.5.x | ✅ | +| < 0.5 | ❌ | diff --git a/crates/README.md b/crates/README.md new file mode 100644 index 0000000..fd631c4 --- /dev/null +++ b/crates/README.md @@ -0,0 +1,21 @@ +# Rust crates + +typeDiagram's Rust workspace. Each directory here is a workspace member (see the +root [`Cargo.toml`](../Cargo.toml)). + +Every crate MUST inherit the shared strict lint table by adding this to its own +`Cargo.toml`: + +```toml +[lints] +workspace = true +``` + +- **Formatting** is governed by the root `rustfmt.toml` (`cargo fmt`). +- **Linting** is governed by the root `Cargo.toml` `[workspace.lints]` — all lints + on and up to `deny`, per REPO-STANDARDS-SPEC `[LINT-RUST]`. + +Once the first crate lands, wire `cargo fmt --all --check`, `cargo clippy +--all-targets -- -D warnings`, and `cargo llvm-cov` into the `fmt` / `lint` / +`test` Makefile targets so Rust joins the same fail-fast + coverage pipeline as +TypeScript. diff --git a/package-lock.json b/package-lock.json index be0d9dc..b84f418 100644 --- a/package-lock.json +++ b/package-lock.json @@ -312,6 +312,7 @@ "dev": true, "license": "MIT", "optional": true, + "peer": true, "dependencies": { "@emnapi/wasi-threads": "1.2.2", "tslib": "^2.4.0" @@ -324,6 +325,7 @@ "dev": true, "license": "MIT", "optional": true, + "peer": true, "dependencies": { "tslib": "^2.4.0" } @@ -335,6 +337,7 @@ "dev": true, "license": "MIT", "optional": true, + "peer": true, "dependencies": { "tslib": "^2.4.0" } @@ -637,6 +640,7 @@ "dev": true, "license": "MIT", "optional": true, + "peer": true, "dependencies": { "@tybys/wasm-util": "^0.10.3" }, @@ -725,6 +729,7 @@ "os": [ "android" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -742,6 +747,7 @@ "os": [ "darwin" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -759,6 +765,7 @@ "os": [ "darwin" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -776,6 +783,7 @@ "os": [ "freebsd" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -793,6 +801,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -805,14 +814,12 @@ "arm64" ], "dev": true, - "libc": [ - "glibc" - ], "license": "MIT", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -825,14 +832,12 @@ "arm64" ], "dev": true, - "libc": [ - "musl" - ], "license": "MIT", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -845,14 +850,12 @@ "ppc64" ], "dev": true, - "libc": [ - "glibc" - ], "license": "MIT", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -865,14 +868,12 @@ "s390x" ], "dev": true, - "libc": [ - "glibc" - ], "license": "MIT", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -885,14 +886,12 @@ "x64" ], "dev": true, - "libc": [ - "glibc" - ], "license": "MIT", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -905,14 +904,12 @@ "x64" ], "dev": true, - "libc": [ - "musl" - ], "license": "MIT", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -930,6 +927,7 @@ "os": [ "openharmony" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -944,6 +942,7 @@ "dev": true, "license": "MIT", "optional": true, + "peer": true, "dependencies": { "@emnapi/core": "1.11.1", "@emnapi/runtime": "1.11.1", @@ -966,6 +965,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -983,6 +983,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": "^20.19.0 || >=22.12.0" } @@ -1126,6 +1127,7 @@ "dev": true, "license": "MIT", "optional": true, + "peer": true, "dependencies": { "tslib": "^2.4.0" } @@ -3827,6 +3829,7 @@ "os": [ "android" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3848,6 +3851,7 @@ "os": [ "darwin" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3869,6 +3873,7 @@ "os": [ "darwin" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3890,6 +3895,7 @@ "os": [ "freebsd" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3911,6 +3917,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3927,14 +3934,12 @@ "arm64" ], "dev": true, - "libc": [ - "glibc" - ], "license": "MPL-2.0", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3951,14 +3956,12 @@ "arm64" ], "dev": true, - "libc": [ - "musl" - ], "license": "MPL-2.0", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3975,14 +3978,12 @@ "x64" ], "dev": true, - "libc": [ - "glibc" - ], "license": "MPL-2.0", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -3999,14 +4000,12 @@ "x64" ], "dev": true, - "libc": [ - "musl" - ], "license": "MPL-2.0", "optional": true, "os": [ "linux" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -4028,6 +4027,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -4049,6 +4049,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": ">= 12.0.0" }, @@ -5835,6 +5836,7 @@ "os": [ "aix" ], + "peer": true, "engines": { "node": ">=18" } @@ -5852,6 +5854,7 @@ "os": [ "android" ], + "peer": true, "engines": { "node": ">=18" } @@ -5869,6 +5872,7 @@ "os": [ "android" ], + "peer": true, "engines": { "node": ">=18" } @@ -5886,6 +5890,7 @@ "os": [ "android" ], + "peer": true, "engines": { "node": ">=18" } @@ -5903,6 +5908,7 @@ "os": [ "darwin" ], + "peer": true, "engines": { "node": ">=18" } @@ -5920,6 +5926,7 @@ "os": [ "darwin" ], + "peer": true, "engines": { "node": ">=18" } @@ -5937,6 +5944,7 @@ "os": [ "freebsd" ], + "peer": true, "engines": { "node": ">=18" } @@ -5954,6 +5962,7 @@ "os": [ "freebsd" ], + "peer": true, "engines": { "node": ">=18" } @@ -5971,6 +5980,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -5988,6 +5998,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6005,6 +6016,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6022,6 +6034,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6039,6 +6052,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6056,6 +6070,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6073,6 +6088,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6090,6 +6106,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6107,6 +6124,7 @@ "os": [ "linux" ], + "peer": true, "engines": { "node": ">=18" } @@ -6124,6 +6142,7 @@ "os": [ "netbsd" ], + "peer": true, "engines": { "node": ">=18" } @@ -6141,6 +6160,7 @@ "os": [ "openbsd" ], + "peer": true, "engines": { "node": ">=18" } @@ -6158,6 +6178,7 @@ "os": [ "sunos" ], + "peer": true, "engines": { "node": ">=18" } @@ -6175,6 +6196,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": ">=18" } @@ -6192,6 +6214,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": ">=18" } @@ -6209,6 +6232,7 @@ "os": [ "win32" ], + "peer": true, "engines": { "node": ">=18" } @@ -6951,10 +6975,10 @@ }, "packages/cli": { "name": "typediagram", - "version": "0.9.0", + "version": "0.0.0-dev", "license": "MIT", "dependencies": { - "typediagram-core": "0.9.0" + "typediagram-core": "0.0.0-dev" }, "bin": { "typediagram": "dist/bin.js" @@ -6967,7 +6991,7 @@ }, "packages/typediagram": { "name": "typediagram-core", - "version": "0.9.0", + "version": "0.0.0-dev", "license": "MIT", "dependencies": { "elkjs": "^0.11.1" @@ -7415,11 +7439,11 @@ }, "packages/vscode": { "name": "typediagram-vscode", - "version": "0.9.0", + "version": "0.0.0-dev", "license": "MIT", "dependencies": { "markdown-it": "^14.3.0", - "typediagram-core": "0.9.0" + "typediagram-core": "0.0.0-dev" }, "devDependencies": { "@types/markdown-it": "^14.1.2", @@ -7876,10 +7900,10 @@ }, "packages/web": { "name": "@typediagram/web", - "version": "0.9.0", + "version": "0.0.0-dev", "dependencies": { "marked": "^18.0.0", - "typediagram-core": "0.9.0" + "typediagram-core": "0.0.0-dev" }, "devDependencies": { "@11ty/eleventy": "^3.1.6", diff --git a/packages/cli/package.json b/packages/cli/package.json index 9112a8e..6c22f55 100644 --- a/packages/cli/package.json +++ b/packages/cli/package.json @@ -1,6 +1,6 @@ { "name": "typediagram", - "version": "0.9.0", + "version": "0.0.0-dev", "description": "typeDiagram CLI — parse a .td source file and emit SVG", "license": "MIT", "repository": { @@ -24,7 +24,7 @@ "typecheck": "tsc --noEmit -p tsconfig.build.json" }, "dependencies": { - "typediagram-core": "0.9.0" + "typediagram-core": "0.0.0-dev" }, "devDependencies": { "typescript": "^6.0.3", diff --git a/packages/typediagram/package.json b/packages/typediagram/package.json index 0d0d016..0bc13d9 100644 --- a/packages/typediagram/package.json +++ b/packages/typediagram/package.json @@ -1,6 +1,6 @@ { "name": "typediagram-core", - "version": "0.9.0", + "version": "0.0.0-dev", "description": "A small DSL for diagramming algebraic data types (records + tagged unions). Language-neutral. No methods.", "license": "MIT", "repository": { diff --git a/packages/vscode/package.json b/packages/vscode/package.json index 80c7571..993337a 100644 --- a/packages/vscode/package.json +++ b/packages/vscode/package.json @@ -2,7 +2,7 @@ "name": "typediagram-vscode", "displayName": "TypeDiagram", "description": "TypeDiagram language support with live SVG preview", - "version": "0.9.0", + "version": "0.0.0-dev", "publisher": "nimblesite", "engines": { "vscode": "^1.99.0" @@ -159,7 +159,7 @@ }, "dependencies": { "markdown-it": "^14.3.0", - "typediagram-core": "0.9.0" + "typediagram-core": "0.0.0-dev" }, "devDependencies": { "@types/markdown-it": "^14.1.2", diff --git a/packages/web/package.json b/packages/web/package.json index ac1d760..3ea5c8f 100644 --- a/packages/web/package.json +++ b/packages/web/package.json @@ -1,6 +1,6 @@ { "name": "@typediagram/web", - "version": "0.9.0", + "version": "0.0.0-dev", "description": "typeDiagram web playground — live editor that renders SVG via the framework.", "type": "module", "private": true, @@ -22,7 +22,7 @@ }, "dependencies": { "marked": "^18.0.0", - "typediagram-core": "0.9.0" + "typediagram-core": "0.0.0-dev" }, "devDependencies": { "@11ty/eleventy": "^3.1.6", diff --git a/rustfmt.toml b/rustfmt.toml new file mode 100644 index 0000000..a093dae --- /dev/null +++ b/rustfmt.toml @@ -0,0 +1,12 @@ +# agent-pmo:372ce7f +# Rust formatting — REPO-STANDARDS-SPEC [LINT-RUST-FMT]. Applied by `cargo fmt`. +edition = "2021" +max_width = 100 +use_small_heuristics = "Default" +imports_granularity = "Crate" +group_imports = "StdExternalCrate" +format_code_in_doc_comments = true +wrap_comments = true +comment_width = 100 +normalize_comments = true +normalize_doc_attributes = true diff --git a/shipwright.json b/shipwright.json index 794df4a..2c2eca0 100644 --- a/shipwright.json +++ b/shipwright.json @@ -3,7 +3,7 @@ "product": { "id": "typediagram", "displayName": "typeDiagram", - "version": "0.9.0" + "version": "0.0.0-dev" }, "supplyChain": { "slsaBuildLevel": 2, @@ -21,7 +21,7 @@ "kind": "cli", "language": "typescript", "binaryName": "typediagram", - "expectedVersion": "0.9.0", + "expectedVersion": "0.0.0-dev", "platforms": ["all"], "sources": ["bundled"], "required": true From 8c068ae866ea59c3aaf9c80a2b88d0fa308fd6dc Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 18:12:28 +1000 Subject: [PATCH 04/16] stuff --- .deslop.toml | 22 +++++++++++++--------- .gitignore | 3 +++ 2 files changed, 16 insertions(+), 9 deletions(-) diff --git a/.deslop.toml b/.deslop.toml index 79ea98b..e66a59b 100644 --- a/.deslop.toml +++ b/.deslop.toml @@ -2,14 +2,18 @@ # Deslop duplication gate — REPO-STANDARDS-SPEC [CI-DESLOP]. # Single source of truth for this repo's duplication budget. Committed, PR-reviewed, # ratcheted DOWN only (never up without written justification). -# CI runs `deslop .`, which reads this file and exits 3 (tanking the build) when -# measured repo-wide duplication exceeds the value below. +# CI runs `deslop .`, which reads this file and exits 3 (tanks the build) when +# duplication exceeds the ceiling below. # Docs: https://deslop.live/docs/for-ai/ -# -# MEASURED, not guessed: the live Deslop report put repo-wide duplication at -# 21.33% at setup time (Deslop scans this repo's TypeScript + the incoming Rust). -# The ceiling below is that value plus a small jitter buffer. The bulk of it is -# table-style test data in packages/typediagram/test/converters/*.test.ts — drive -# this number DOWN as that is de-duplicated; never raise it. + +[defaults] +# Exclude ONLY build/coverage artifacts — never source, and NEVER tests. Tests are +# first-class code here and stay in the duplication budget. node_modules/target/build +# are already default-excluded; dist + coverage are this repo's generated-output dirs. +exclude = [ + "**/coverage/**", + "**/dist/**", +] + [threshold] -max_duplication_percent = 21.5 +max_duplication_percent = 15.0 diff --git a/.gitignore b/.gitignore index 27098bd..78f8b0e 100644 --- a/.gitignore +++ b/.gitignore @@ -96,3 +96,6 @@ packages/web/test-results/ **/*.rs.bk # Cargo.lock IS committed on purpose — this workspace produces a binary (CLI). # Do NOT add Cargo.lock here. + + +*.log \ No newline at end of file From fc9c7ac5fe71ebfba54af2af65886a223cc8de32 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 18:16:14 +1000 Subject: [PATCH 05/16] Stuff --- Cargo.toml | 2 +- SECURITY.md | 2 +- docs/research/binary-format-research.md | 254 ++++++++++++++++++++++++ 3 files changed, 256 insertions(+), 2 deletions(-) create mode 100644 docs/research/binary-format-research.md diff --git a/Cargo.toml b/Cargo.toml index 343701e..fa73b6e 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -19,7 +19,7 @@ members = ["crates/*"] [workspace.package] edition = "2021" license = "MIT" -repository = "https://github.com/MelbourneDeveloper/type_diagram" +repository = "https://github.com/Nimblesite/typeDiagram" [workspace.lints.rust] unsafe_code = "deny" diff --git a/SECURITY.md b/SECURITY.md index c76e420..ea6f396 100644 --- a/SECURITY.md +++ b/SECURITY.md @@ -9,7 +9,7 @@ discussions, or pull requests.** Report privately through GitHub's **private vulnerability reporting**: go to the repository's **Security** tab → **Report a vulnerability** (or -`https://github.com/MelbourneDeveloper/type_diagram/security/advisories/new`). This opens a +`https://github.com/Nimblesite/typeDiagram/security/advisories/new`). This opens a private, structured advisory only the maintainers can see. If you cannot use that channel, email **cftools@nimblesite.co**. diff --git a/docs/research/binary-format-research.md b/docs/research/binary-format-research.md new file mode 100644 index 0000000..cc9b315 --- /dev/null +++ b/docs/research/binary-format-research.md @@ -0,0 +1,254 @@ +# typeDiagram Binary Format — Research (RAW) + +> **Status:** raw research dump. Not a spec. Feeds the future `[TDBIN-*]` spec. +> **Goal:** a cross-language binary serialization format for typeDiagram ADTs (records + tagged unions) that is **smaller AND faster than Protobuf/gRPC** — both axes, no excuses. +> **Method:** deep-research fan-out over authoritative sources (peer-reviewed papers — IPL, VLDB, SIGMOD, SPE; format authors' own specs/design rationale; Lemire's integer-decoding work). 118 claims, adversarially verified. Sources listed at the bottom, each numbered `[Sn]`. +> **Scope note:** typeDiagram is the *definition language* (the schema). This doc is about the *wire format* the schema compiles to. Rust + TypeScript are the first codegen targets, but the format is language-neutral by design. + +--- + +## 0. TL;DR — how we beat Protobuf on both axes + +Protobuf pays two taxes on **every message**: + +1. **A per-field tag varint** (field number + wire type), plus a length varint for every length-delimited field. This is pure overhead repeated on the wire millions of times. `[S9][S15]` +2. **A full decode pass** — every field is parsed out of varints and materialized into heap objects before you can read anything. `[S9][S18][S19]` + +The state of the art kills each tax with a different family of format, but **each family loses the other axis**: + +- **Zero-parse formats (Cap'n Proto, FlatBuffers, SBE)** kill tax #2 — in-memory layout == wire layout, no decode step → decode is ~free (FlatBuffers is **~3,700× faster** than Protobuf on decode+traverse `[S17]`, **~60× faster** decode in Go `[S16]`). **But** fixed-width fields + alignment padding make them **bigger** than Protobuf (FlatBuffers 344 B vs Protobuf 228 B for the same object — ~50% larger `[S17]`; 432 B vs 299 B in `[S16]`). +- **Varint/columnar formats (Protobuf, Parquet, ORC)** kill wire size — but pay tax #2 in decode CPU (LEB128 branch-mispredicts; heavy encoding = up to **4.2× scan penalty** `[S12]`). + +**Our thesis: you can have both, because the two taxes are independent.** The winning recipe is: + +1. **Schema-known, layout-fixed body (Cap'n Proto/SBE style)** → *no field tags on the wire at all.* Kills tax #1 → smaller than Protobuf. `[S9][S10]` +2. **Zero-parse / verify-on-access reads** → point into the buffer, don't materialize. Kills tax #2 → faster than Protobuf. `[S9][S17][S18]` +3. **Recover the padding that would otherwise make us bigger** via Cap'n Proto's XOR-with-default + word-packing trick (worst case **2 bytes per 2 KiB** overhead, mostly SIMD-friendly zero-run removal). `[S10]` +4. **SIMD-friendly integer/bit encodings on the hot path** — bit-packing (SIMD-BP128 is *both* ~2× faster than varint-G8IU *and* up to 2 bits/int smaller `[S13]`) and stream-vbyte (control/data split, >4B ints/s `[S2][S3]`) — never scalar LEB128. +5. **Sub-byte packing** for bits and small union discriminants (8 bools/byte `[S10]`; a 4-variant union needs **2 bits**, not a tag byte + varint). +6. **Column-orient arrays of records** (ADT-shaped repeated data): ~13% smaller *and* O(1) random access *and* SIMD-scannable. `[S8][S6]` + +The result is a format that is **schema-driven like Protobuf** (so it stays small) but **decode-free like Cap'n Proto** (so it stays fast), with the size-cost of zero-copy clawed back by packing and sub-byte encoding. + +--- + +## 1. The size ↔ speed Pareto — three regimes + +Not every choice is a tradeoff. Sort every technique into one of three buckets and the design writes itself. + +### Regime A — Free wins (smaller AND faster; take all of them) +| Technique | Why it wins both | Source | +|---|---|---| +| Drop per-field tags (schema-known layout) | Fewer bytes *and* no tag-parse branch | `[S9][S10]` | +| Zero-parse / verify-on-access | No decode step; also no allocation (FlatBuffers stores decoded wire in **0 bytes / 0 blocks** vs Protobuf-LITE 760 B / 20 blocks) | `[S17]` | +| SIMD bit-packing (SIMD-BP128) | ~2× faster than varint-G8IU *and* saves up to 2 bits/int, ~1.5 cycles/int | `[S13]` | +| Bit-pack bools & small enums | 8 bools/byte; 2-bit discriminant | `[S10]` | +| Column layout for record arrays | 13% smaller (length/presence) *and* SIMD-scannable *and* O(1) access | `[S8][S6][S19]` | +| Store field XOR default | New/absent fields = zeros → free defaults *and* packing deflates them | `[S10]` | + +### Regime B — Real tradeoffs (pick a point; make it a knob) +| Axis | Small end | Fast end | Where the data says to sit | +|---|---|---|---| +| Integer width | LEB128 varint (compact) | Fixed-width (no branch) | **Varint for cold scalars, SIMD bit-pack for hot arrays.** Scalar LEB128 mispredicts: a Haswell mispredict is **15+ cycles** `[S11]`. | +| Alignment | Tight-packed (small) | Word-aligned (zero-copy) | **Align in-memory, pack on the wire** (Cap'n Proto packing recovers padding at 2 B/2 KiB worst case) `[S10]`. | +| Compression | zstd/Snappy (8× smaller) | None (fast) | **None by default.** Block compression = up to **4.2× scan overhead** `[S12]`; on modern storage the bandwidth saving doesn't pay for decode CPU `[S12]`. Optional zstd *layer*, never the base. | +| Nested encoding | length/presence (13% smaller) | rep/def levels (read only target column) | **length/presence for our row-ish reads; rep/def only if we go deep-columnar** `[S8]`. | + +### Regime C — Anti-patterns (avoid; they lose a axis for little gain) +- **Multiple integer encodings switched at decode time** (ORC does 4) → **3× more branch mispredictions, 4× more subsequences** than Parquet's simpler scheme → slower. Keep the decode critical path *uniform*. `[S12]` +- **RLE for short runs** → hard to SIMD, slower than bit-packing when repetition counts are small. `[S12]` +- **General-purpose byte compressors on integer arrays** → specialized integer codecs are an *order of magnitude* faster than Snappy while compressing better. `[S13]` + +--- + +## 2. Hard benchmark numbers (the Pareto, measured) + +These are the head-to-head numbers that anchor "faster and smaller than Protobuf" in reality, not vibes. + +### 2.1 FlatBuffers vs Protobuf-LITE — official FlatBuffers benchmark `[S17]` +| Metric | FlatBuffers | Protobuf-LITE | Ratio | +|---|---|---|---| +| Decode + traverse + dealloc, 1M× | **0.08 s** | 302 s | **~3,700× faster** | +| Encode 1M objects | **3.2 s** | 185 s | ~58× faster | +| Memory to store decoded wire | **0 B / 0 blocks** | 760 B / 20 blocks | zero-alloc | +| Wire size (uncompressed) | 344 B | **228 B** | FB ~50% *bigger* | +| Wire size (zlib) | 220 B | **174 B** | FB bigger | + +➡️ **Lesson:** zero-copy crushes decode but *loses on size*. We must reclaim size (§4). + +### 2.2 Go: Protobuf vs FlatBuffers vs Cap'n Proto — `[S16]` +| Metric | Protobuf | gogofaster | FlatBuffers | Cap'n Proto | capnp-packed | +|---|---|---|---|---|---| +| Decode ns/op | 1179 | 496.2 | **18.89** | 830.8 | 1716 | +| Encode ns/op | 883.8 | **384.4** | 856.8 | 1709 | 2591 | +| Wire bytes | 299 | 299 | 432 | 440 | 344 | + +➡️ **Lesson:** the zero-copy win is concentrated on **decode/read**. FlatBuffers *encode* is slower than Protobuf. Cap'n Proto **packed** cuts 440→344 B but ~doubles both encode and decode → packing is a size/speed knob, not free. + +### 2.3 Rust: same benchmark — `[S16]` +| Metric | rust-protobuf | prost | FlatBuffers | +|---|---|---|---| +| Decode ns/op | 751.61 | 1058.7 | **331.12** | +| Encode ns/op | — | 642.90 | 878.02 | + +➡️ **Lesson:** the decode edge is **only ~2–3× in Rust** vs ~60× in Go → *implementation/language quality dominates absolute numbers.* Our Rust + TS codegen quality matters as much as the format. + +### 2.4 Rust serialization benchmark (djkoloski) — `[S15]` +- **Zero-copy access:** rkyv **1.2450 ns**, matched by nibblecode → nanosecond field access vs microsecond parse-based formats. +- **Fastest encode/decode:** Bitcode (tag-free) — 138.30 µs ser, 1.4597 ms deser — beats Protobuf, bincode, MessagePack. +- **Smallest:** Compactly (bit-packing) 239,520 B vs Bitcode 703,710 B → **smallest ≠ fastest** (different formats win each axis). +- Protobuf variants (prost, 3.7.2, 4.35.1): "higher overhead from schema/tag processing" — neither smallest nor fastest. + +### 2.5 Empirical eval of 13 serializers (arXiv 2407.13494, 2024) — `[S18]` +- **Cap'n Proto: fastest serialize AND deserialize of all 13** (beats Protobuf, Thrift, Avro, MessagePack, CBOR, BSON, text) — because in-memory repr == encoded repr, no serialize step. +- On **size**, capnp-packed / Protobuf / CBOR / BSON / UBJSON / Thrift are all competitive; Pickle/Avro/XML worst. +- Thrift best raw throughput; MessagePack best *schemaless*. + +--- + +## 3. Findings by topic (with the authoritative detail) + +### 3.1 Zero-copy / zero-parse formats +- **Cap'n Proto core principle:** data laid out identically in memory and on the wire → eliminates encode/decode entirely. `[S9]` +- **Cap'n Proto struct layout:** fixed body = **data section** (scalars) followed by **pointer section**; struct pointer carries data-size and pointer-size in words; everything word-aligned so intra-segment relative pointers are followed without parsing. `[S10]` +- **FlatBuffers:** nested objects addressed by offsets, traversed in-place, no unpack step. Tables use a **vtable** recording where each field lives (vs Protobuf field IDs); missing/deprecated fields resolve to defaults; a table can cost *less* than a struct because default-valued fields aren't stored. `[S22][S1]` +- **Arrow:** columnar, O(1) random access, **relocatable without pointer swizzling** → true zero-copy in shared memory. `[S5]` +- **The catch (all zero-copy):** fixed-width + alignment ⇒ padding, which can **double or triple** message size; Protobuf avoids padding *only because* it accepts a separate encode/decode step. `[S9]` Arena allocation is forced — you can't free individual objects, only the whole arena. `[S9]` +- **"Real zero-copy" caveat:** the term is often overstated — variable-length/validation still costs; treat zero-copy as "no materialization on read," not literally zero work. `[S20]` + +### 3.2 Fast integer decoding (the varint problem) +- **Why scalar LEB128 is slow:** variable length ⇒ unpredictable per-byte branches ⇒ branch mispredictions + pipeline stalls + no vectorization. A Haswell mispredict = **15+ cycles**; worst when 1-byte and 2-byte values interleave so the length branch is unpredictable. `[S11][S3]` +- **Stream VByte (Lemire, IPL 2018):** *separates the control stream (length descriptors) from the data bytes* → SIMD can batch-decode. **>4 billion ints/s** on 3.4 GHz Haswell, **up to 2× faster than varint-G8IU**, at times **exceeding memcpy**. Patent-free. `[S2][S3]` +- **Masked VByte:** SIMD-decodes the *unmodified* VByte wire format 2–4× faster (650–2700 M ints/s vs 300–1100 scalar) using `pmovmskb` to pull continuation bits into a mask, then a `pshufb` shuffle table. No wire change needed. `[S4]` +- **SIMD-BP128 (Lemire & Boytsov, SPE 2015):** vectorized **bit-packing** decodes **~2.3 billion 32-bit ints/s at ~1.5 cycles/int**, nearly **2× faster than varint-G8IU/PFOR** *and* saves up to **2 bits/int**. The both-axes proof. Companion **SIMD-FastPFOR**: within 10% of Simple-8b's ratio but **2× faster decode**. Even the prefix-sum (delta) step must be vectorized to cross 2B ints/s. `[S13]` +- **SFVInt (2024):** decodes LEB128 up to **2× faster than Protobuf/Folly** varint decoders using BMI2 **PEXT/PDEP** to extract continuation bits in parallel, ~500 LOC, handles 32- and 64-bit in one generic path. Gain is workload-dependent (2× on skewed W4, 45% W3, 19% W2). `[S14]` +- **varint-simd (Rust):** branchless SIMD LEB128 — 554 M u8/s single, **896 M u8/s** 8× batch, beats prost / rustc / integer-encoding-rs. Provides zigzag for Protobuf compatibility. **CPU-feature dependent:** SSSE3 min, optionally POPCNT/LZCNT/BMI2/AVX2. `[S7]` +- ⚠️ **Portability tax:** all the fastest decoders are x86 SIMD/BMI2. TS/WASM and ARM need fallbacks → the wire format must be **fast to decode *scalar* too** (favors fixed-width + bit-packing over exotic varints on the hot path). + +### 3.3 Tagged unions / sum types on the wire +- **Arrow dense union:** `int8` type-id buffer + `int32` offsets buffer into per-variant child arrays → stores **only the present variant's value**. **Sparse union:** every child array is full-length (no offsets) — simpler random access, wastes space. `[S5]` +- **PLUR (arXiv 1708.08319):** a minimal ADT type system of exactly **4 constructors — Primitive, List, Union (sum), Record (product)** — encodes a Union as a **tag array + per-variant data arrays** (Arrow dense union). Crucially: **the schema can be a naming convention on the arrays — zero per-object type metadata.** Zero-copy on a memory-mapped file, no materialization → analysis ran at 6–18 MHz vs **0.4 MHz** for full object materialization (**~15–45×**). `[S6]` +- **Discriminant sizing:** a tagged union with *N* variants needs ⌈log₂N⌉ bits. Cap'n Proto/typeDiagram should **bit-pack the discriminant** (2 bits for ≤4 variants) rather than spend a tag byte + varint like Protobuf `oneof`. Tagged-union theory: the discriminant + payload, discriminant packed into spare bits where the payload leaves room. `[S21]` + +### 3.4 Bit-packing / sub-byte fields +- **Cap'n Proto:** 8 `Bool`s per byte, little-endian bit order (first bit = LSB of first byte). `[S10]` +- **Arrow validity bitmap:** 1 bit/value, LSB numbering, 1 = non-null — a 5-element array's null mask is **5 bits**. `[S5][S6]` +- **XOR-with-default:** Cap'n Proto stores each data field XOR'd with its schema default → absent/new fields read back as default at **zero storage**, and the buffer becomes mostly zeros → the packing compressor deflates it. `[S10]` +- **Cap'n Proto packing:** each 8-byte word → 1 tag byte + 0–8 non-zero content bytes (zero bit in tag ⇒ omit that byte), plus run-length tags for all-zero and all-dense spans. **Worst case: 2 bytes per 2 KiB.** Cheap, streaming, SIMD-able. `[S10]` + +### 3.5 Columnar vs row layout +- **Dremel (VLDB 2020):** across **65 Google datasets**, **length/presence encoding (ORC/Arrow) is on average 13% smaller** than rep/def-level encoding. Tradeoff: rep/def is self-contained per column (read *only* the target column); length/presence needs the target's **ancestor columns** → extra I/O/seeks. `[S8]` +- **Row reordering to lengthen RLE runs:** 17% avg byte savings across 40 datasets (up to 75%); optimal reordering is **NP-complete** → heuristics/sampling. `[S8]` +- **Arrow vs Parquet:** Parquet uses Dremel shredding + varlen encoding + block compression → drastically smaller **but sacrifices random access**; Arrow is the in-memory, decode-free counterpart. Parquet encodes nulls as **16-bit definition levels** (+ compression); Arrow as a **1-bit validity mask**. `[S1]` +- **Columnar CPU win:** processing large contiguous blocks *without intervening conditional branches* is the core analytics speedup — directly attacks branch-misprediction cost. `[S1]` +- **When to column-orient in typeDiagram:** arrays of records / repeated fields (ADT-shaped bulk data). Single records stay row-ish. `[S6]` + +### 3.6 Storage-format tradeoff studies (the "don't over-compress" evidence) +- **Columnar Storage Formats (VLDB 2023):** on modern hardware **favor fast decode over compression ratio**; **do NOT apply block compression (Snappy/zstd) by default** — bandwidth savings don't justify decode CPU. Block compression = up to **4.2× scan overhead**. Keep the decode path *uniform* (ORC's 4 switched encodings cost 3× mispredicts). Parquet bit-unpacks with SIMD + codegen to avoid branches. `[S12]` +- **Data Formats in Analytical DBMSs (2024):** encoding-heavy formats pay a heavy read penalty. Arrow is **fastest to deserialize** (no decode). Encoding buys ~8× smaller (Parquet CR 0.13, ORC 0.27 vs Arrow 1.07, dict-Arrow 0.48) but loses random access. **No single format is optimal across compress/deserialize/access → co-design in-memory + on-disk for the target workload.** `[S19]` + +### 3.7 Schema evolution vs compactness +- **Protobuf's cost of evolution:** the per-field tag varint *is* the evolution mechanism (unknown fields skipped by tag) — that's the tax we remove. So our evolution has to come from **layout**, not tags. +- **Cap'n Proto (compact + evolvable):** field byte-position depends only on its own definition + lower-numbered fields, **never higher-numbered** → new fields append into leftover padding; XOR-with-default makes absent fields read correctly. Backward *and* forward compatible **with no tags**. `[S10]` ⬅️ **this is our evolution model.** +- **FlatBuffers:** vtable indirection; new fields appended at end (or explicit `id`); **fields can never be removed — only `deprecated`** (slot preserved); defaults omitted from wire so **changing a default breaks old data**; type change only allowed if same byte width (sign changes unsafe); adding tables/vectors/structs always safe; new union variants appended. `[S23]` + +### 3.8 Verify-on-access safety (the cost of skipping parse) +- **FlatBuffers/flatcc:** no bounds checking unless you **explicitly** call the verifier; verification is a **full O(n) pass**. `[S9][S24]` +- **What verification does *not* guarantee:** it proves the buffer is **safe to read (not write)**, **not** that it has the correct type — a wrong-typed buffer that passes may yield garbage, not a crash. `[S24]` +- **Attack surface:** deep nesting ⇒ stack-recursion DoS (flatcc hard-limits ~100 levels); shared references (DAGs) can unfold **exponentially** on copy/print even when read-safe; in-place modification is unsafe even after verification. `[S24]` +- **Cap'n Proto stance:** validation-as-anti-feature — bounds are checked lazily *on pointer traversal* rather than up-front, so you pay only for what you read. `[S25]` +- ➡️ **typeDiagram implication:** ship a **fast O(n) verifier** + typed buffer header (magic + schema hash) + depth limit; make verify **opt-in for trusted, mandatory for untrusted** input. + +--- + +## 4. Design blueprint for the typeDiagram binary format + +Synthesizing the above into a concrete, both-axes-winning design. (Working name: **TDBIN**. Spec IDs will be `[TDBIN-*]`.) + +### 4.1 Primitive types (tight, as the DSL demands) +| DSL type | Wire | Notes | +|---|---|---| +| `bit` / `bool` | 1 bit, packed 8/byte | Cap'n Proto style, LE bit order `[S10]` | +| `u8…u64`, `i8…i64` | fixed-width LE | fixed on hot path (no branch); zigzag for signed varint mode | +| `f32` / `f64` | IEEE-754 LE fixed | | +| `int` (cold scalar) | LEB128 varint (optional) | only where size matters and it's not a hot array | +| `string` | offset + length into a data region, UTF-8 | Arrow-style `offsets[j+1]-offsets[j]` for O(1) `[S5]` | +| `bytes` | offset + length | same | +| enum (≤N variants) | ⌈log₂N⌉ bits, packed | 2 bits for 4 variants | + +### 4.2 Records (product types) +- **Fixed body = data section (scalars, bit-packed) + pointer/offset section (variable-length children).** Cap'n Proto layout. `[S10]` +- **No field tags.** Field position is schema-derived; depends only on own + lower-numbered fields → append-only evolution. `[S10]` +- **Store scalars XOR default** → absent/new fields free; buffer trends to zeros. `[S10]` +- Word-align **in memory**; **pack on the wire** (§4.5). + +### 4.3 Tagged unions (sum types) — the ADT heart +- **Discriminant:** ⌈log₂N⌉ bits, packed into the record's bit region (not a byte tag). `[S21]` +- **Payload:** only the present variant is stored (dense-union semantics). `[S5][S6]` +- **Arrays of unions:** dense-union columnar — a discriminant column + per-variant data columns. `[S6]` + +### 4.4 Arrays of records (bulk ADT data) — go columnar +- **Struct-of-arrays** for repeated records: each field its own contiguous buffer → SIMD scan, O(1) random access, 13% smaller via length/presence nesting. `[S6][S8][S19]` +- **Nulls:** 1-bit validity mask per column (Arrow). `[S5]` +- **Hot integer columns:** SIMD bit-packing (SIMD-BP128 family) — smaller *and* faster; scalar fallback stays branch-light. `[S13]` +- Keep the decode path **uniform** — one integer encoding per column, not switched. `[S12]` + +### 4.5 The size-recovery layer (so we beat Protobuf on bytes) +- **Wire packing** (Cap'n Proto scheme): strip zero bytes word-by-word, 2 B/2 KiB worst case. Turns the padding/zeros from fixed layout + XOR-default into near-zero overhead. `[S10]` +- **NO block compression by default** (4.2× scan penalty). Optional `zstd` as an outer, explicit layer for cold storage/transport only. `[S12][S19]` + +### 4.6 Safety +- Typed buffer header: magic + schema hash + version. +- **Fast O(n) verifier**, opt-in for trusted / required for untrusted. `[S9][S24]` +- Depth limit (~100) against recursion DoS; reject DAG expansion on copy. `[S24]` + +### 4.7 Cross-language decode strategy +- Wire format must decode **fast scalar** (TS/WASM/ARM) *and* SIMD-accelerated (native x86/ARM-NEON) — fixed-width + bit-packing satisfy both; exotic SIMD-only varints do not. `[S7][S14]` +- Codegen quality dominates absolute perf (§2.3) → invest in the Rust and TS generators, not just the format. + +--- + +## 5. Open questions / risks to resolve in the spec + +1. **Random access vs streaming:** SBE forbids random access (preorder, no offsets) but is maximally compact/fast to write; Cap'n Proto uses pointers for random access at a size cost `[S9]`. typeDiagram likely wants **pointer-based random access** for the general case — confirm against target workloads. +2. **Alignment target:** 8-byte (Cap'n Proto word) vs 64-byte (Arrow SIMD) `[S5]`. 64-byte helps SIMD scans but bloats small messages — probably **8-byte for messages, 64-byte for columnar bulk buffers**. +3. **Varint on cold scalars — worth the branch?** Measure: does LEB128 on cold fields save enough bytes to justify the misprediction risk vs fixed-width + wire packing? +4. **Evolution guarantees to promise:** adopt Cap'n Proto's "append into padding, XOR default" rules exactly `[S10]`; decide FlatBuffers-style "never remove, only deprecate" `[S23]`. +5. **Which SIMD integer codec** to standardize the columnar hot path on: SIMD-BP128 (both-axes best `[S13]`) vs Stream VByte (memcpy-speed, simpler `[S2]`) — likely **bit-packing primary, stream-vbyte fallback**. +6. **Nested encoding:** length/presence (13% smaller, needs ancestors) vs rep/def (read-one-column) `[S8]` — depends on whether we expect column-selective reads. + +--- + +## 6. Sources + +Ranked-in tier per the research (primary = peer-reviewed paper / format author's own spec/rationale; blog = author's technical blog; secondary = reference doc). + +| # | Source | Tier | Date | +|---|---|---|---| +| S1 | [Arrow & Parquet Part 1: Primitive Types & Nullability](https://arrow.apache.org/blog/2022/10/05/arrow-parquet-encoding-part-1/) | primary | 2022-10 | +| S2 | [Stream VByte: Faster Byte-Oriented Integer Compression (Lemire, Kurz, Rupp), IPL 2018](https://arxiv.org/abs/1709.08990) | primary | 2018-02 | +| S3 | [Stream VByte: breaking new speed records — Daniel Lemire](https://lemire.me/blog/2017/09/27/stream-vbyte-breaking-new-speed-records-for-integer-compression/) | blog | 2017-09 | +| S4 | [Vectorized VByte Decoding / Masked VByte (Plaisance, Kurz, Lemire)](https://arxiv.org/pdf/1503.07387) | primary | 2015-06 | +| S5 | [Apache Arrow Columnar Format Specification](https://arrow.apache.org/docs/format/Columnar.html) | primary | v1.5 | +| S6 | [Fast Access to Columnar, Hierarchically Nested Data via Code Transformation (PLUR)](https://arxiv.org/pdf/1708.08319) | primary | 2017-11 | +| S7 | [varint-simd — SIMD LEB128 in Rust](https://github.com/as-com/varint-simd) | primary | — | +| S8 | [Dremel: A Decade of Interactive SQL Analysis at Web Scale (VLDB 2020)](https://www.vldb.org/pvldb/vol13/p3461-melnik.pdf) | primary | 2020 | +| S9 | [Cap'n Proto, FlatBuffers, and SBE — author's design rationale](https://capnproto.org/news/2014-06-17-capnproto-flatbuffers-sbe.html) | primary | 2014-06 | +| S10 | [Cap'n Proto Encoding Spec](https://capnproto.org/encoding.html) | primary | — | +| S11 | [LEB128 — Wikipedia](https://en.wikipedia.org/wiki/LEB128) | secondary | — | +| S12 | [An Empirical Evaluation of Columnar Storage Formats (VLDB 2023, CMU)](https://arxiv.org/pdf/2304.05028) | primary | 2023-11 | +| S13 | [Decoding billions of integers per second through vectorization (Lemire & Boytsov, SPE 2015)](https://arxiv.org/pdf/1209.2137) · [Wiley](https://onlinelibrary.wiley.com/doi/full/10.1002/spe.2203) | primary | 2015 | +| S14 | [SFVInt: Simple, Fast and Generic Variable-Length Integer Decoding using Bit Manipulation](https://arxiv.org/html/2403.06898v4) | primary | 2024 | +| S15 | [rust_serialization_benchmark (djkoloski)](https://github.com/djkoloski/rust_serialization_benchmark) | primary | ~2025 | +| S16 | [buffer-benchmarks — Protobuf/FlatBuffers/Cap'n Proto on Go & Rust](https://github.com/kcchu/buffer-benchmarks) | blog | 2023-01 | +| S17 | [FlatBuffers Official Benchmarks](https://flatbuffers.dev/benchmarks/) | primary | — | +| S18 | [Streaming Technologies and Serialization Protocols: Empirical Performance Analysis (arXiv 2407.13494)](https://arxiv.org/html/2407.13494v2) | primary | 2024-07 | +| S19 | [Data Formats in Analytical DBMSs: Performance Trade-offs and Future Directions](https://arxiv.org/pdf/2411.14331) | primary | 2024-11 | +| S20 | [Real Zero-Copy: A Technical Autopsy of Cap'n Proto](https://dev.to/rafacalderon/real-zero-copy-a-technical-autopsy-of-capn-proto-and-the-serialization-fallacy-3n64) | blog | — | +| S21 | [Tagged union — Wikipedia (discriminant encoding/packing)](https://en.wikipedia.org/wiki/Tagged_union) | secondary | — | +| S22 | [FlatBuffers White Paper (design rationale)](https://flatbuffers.dev/white_paper/) | primary | — | +| S23 | [FlatBuffers Schema Evolution rules](https://flatbuffers.dev/evolution/) | primary | — | +| S24 | [flatcc — FlatBuffers Security (verify-on-access attack surface)](https://github.com/dvidelabs/flatcc/blob/master/doc/security.md) | primary | — | +| S25 | [Cap'n Proto FAQ (validation-as-anti-feature)](https://capnproto.org/faq.html) | primary | — | + +_Additional benchmark corpora consulted: [JS/TS serialization benchmark](https://github.com/Adelost/javascript-serialization-benchmark), [Protobuf vs MessagePack vs CBOR vs FlatBuffers](https://medium.com/@the_atomic_architect/your-api-isnt-slow-your-payload-is-protobuf-vs-messagepack-vs-cbor-vs-flatbuffers-benchmarked-ca6d0193477c)._ From 6323b3d9cbaa2142f9c2db1934b39347a9e4df3e Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 18:19:32 +1000 Subject: [PATCH 06/16] Stuff --- .github/workflows/codeql.yml | 4 +-- docs/research/binary-format-research.md | 47 ++++++++++++++++++++++++- 2 files changed, 48 insertions(+), 3 deletions(-) diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml index 91d8658..dcf2961 100644 --- a/.github/workflows/codeql.yml +++ b/.github/workflows/codeql.yml @@ -67,7 +67,7 @@ jobs: # (repo language ∩ CodeQL-supported at runtime). `build-mode: none` suits # interpreted langs + rust; it avoids re-compiling what ci already builds. include: - - language: actions # scans the workflow files themselves + - language: actions # scans the workflow files themselves build-mode: none - language: javascript-typescript build-mode: none @@ -100,7 +100,7 @@ jobs: shell: bash env: SARIF_DIR: sarif-results - SEVERITY_THRESHOLD: '7.0' + SEVERITY_THRESHOLD: "7.0" run: |- set -euo pipefail shopt -s nullglob diff --git a/docs/research/binary-format-research.md b/docs/research/binary-format-research.md index cc9b315..72b822c 100644 --- a/docs/research/binary-format-research.md +++ b/docs/research/binary-format-research.md @@ -4,6 +4,7 @@ > **Goal:** a cross-language binary serialization format for typeDiagram ADTs (records + tagged unions) that is **smaller AND faster than Protobuf/gRPC** — both axes, no excuses. > **Method:** deep-research fan-out over authoritative sources (peer-reviewed papers — IPL, VLDB, SIGMOD, SPE; format authors' own specs/design rationale; Lemire's integer-decoding work). 118 claims, adversarially verified. Sources listed at the bottom, each numbered `[Sn]`. > **Scope note:** typeDiagram is the *definition language* (the schema). This doc is about the *wire format* the schema compiles to. Rust + TypeScript are the first codegen targets, but the format is language-neutral by design. +> **Roadmap note:** the format will grow **bidirectional streaming** and become an **RPC framework (gRPC-class)**. That is a second, distinct literature (framing, multiplexing, flow control, promise pipelining) — captured at interim depth in §6, with a dedicated research pass running to deepen it. It reshapes several §4 decisions *now*, so it is not deferred. --- @@ -216,10 +217,54 @@ Synthesizing the above into a concrete, both-axes-winning design. (Working name: 4. **Evolution guarantees to promise:** adopt Cap'n Proto's "append into padding, XOR default" rules exactly `[S10]`; decide FlatBuffers-style "never remove, only deprecate" `[S23]`. 5. **Which SIMD integer codec** to standardize the columnar hot path on: SIMD-BP128 (both-axes best `[S13]`) vs Stream VByte (memcpy-speed, simpler `[S2]`) — likely **bit-packing primary, stream-vbyte fallback**. 6. **Nested encoding:** length/presence (13% smaller, needs ancestors) vs rep/def (read-one-column) `[S8]` — depends on whether we expect column-selective reads. +7. **Transport for the RPC layer (§6):** ride HTTP/2-then-HTTP/3 and win on payload only (fast to ship, capped upside) vs a lean custom framing over TCP/QUIC (higher ceiling, more work). Decide after the RPC research pass; either way adopt **QUIC** to beat gRPC's TCP head-of-line blocking, and target **promise pipelining** as the round-trip-collapsing feature gRPC lacks. --- -## 6. Sources +## 6. Streaming & RPC (forward-looking — the format becomes a gRPC-class framework) + +Two-way streaming + an RPC layer is an explicit end goal, so "faster than gRPC" is now a **protocol-level** target, not just a payload-size one. This is a distinct research axis (transport / framing / session), so a dedicated deep-research pass is running to deepen it. Interim implications from the serialization research above: + +### 6.0 typeDiagram is the unified IDL (models + functions) +One language defines both sides of the contract — the equivalent of Protobuf's `message` **and** `service`/`rpc` collapsed into typeDiagram: +- **Model / `type` definitions** → the wire ADTs (records + tagged unions) encoded by TDBIN (§4). These are the request/response/stream payloads. +- **Function definitions** → the **RPC service contract**. A typeDiagram function signature *is* the RPC method: its parameter type(s) and return type are TDBIN-encoded ADTs, and its shape encodes the streaming directionality. +- **Streaming directionality lives in the signature**, not a separate keyword soup — the four gRPC modes map onto function shape: + | Mode | typeDiagram function shape | + |---|---| + | Unary | `f(Req) -> Resp` | + | Server-streaming | `f(Req) -> Stream` | + | Client-streaming | `f(Stream) -> Resp` | + | Bidirectional | `f(Stream) -> Stream` | +- Because functions are first-class typeDiagram definitions, the **method set, argument types, and return types are all schema-known** → the RPC dispatch surface carries **no per-call method-name/tag overhead on the wire** (a numeric method id from the schema, like fields in §4.2), and codegen emits typed client/server stubs for Rust + TS from the same source. This is the RPC analogue of "drop the field tags" (§0): drop the method-name strings too. +- **Promise pipelining (§6.4) is expressible** because a function's return type is a known ADT — a pipelined call references a *field of a not-yet-returned result* by its schema-known offset. + + + +### 6.1 The streaming ↔ zero-copy tension (decide now, it constrains §4) +- Zero-copy formats that address children by **offset/pointer** (Cap'n Proto, FlatBuffers) generally need a child's size *before* writing the parent pointer → **back-patching**, which fights forward-only streaming writes. `[S10]` +- **SBE is the streaming-native counter-design:** preorder, forward-only, no random access, no back-patching — built for low-latency financial message streams; the cost is *no random access*. `[S9]` +- ➡️ **Reconcile:** length-prefixed **frames** on the stream (forward-only, SBE-like framing) with Cap'n Proto-style **pointers *inside* a frame** (random access within a message). Keep the write path forward-only *between* messages; bound back-patching to *within* a single message so encode can start emitting frames before the whole stream is built. + +### 6.2 Framing +- Streaming needs **message framing** so a reader finds boundaries without parsing content. gRPC uses a **5-byte prefix per message** (1 byte compressed-flag + 4-byte big-endian length) carried over HTTP/2 DATA frames. +- Our frame: `[len][schema-hash/version (once per stream, then elided)][body]`; body stays zero-copy-accessible after the O(n) verify (§3.8). + +### 6.3 Multiplexing, flow control, backpressure +- gRPC gets bidirectional streaming, multiplexing, and header compression **for free from HTTP/2** (stream IDs, credit-based flow control, HPACK). To *beat* it we either (a) ride HTTP/2 / HTTP/3 and win purely on the payload (safe first step), or (b) design leaner framing over raw TCP/QUIC with our own stream IDs + credit-based flow control (higher ceiling, more work). +- **HTTP/3 / QUIC** removes the TCP head-of-line blocking that penalizes multiplexed HTTP/2-over-TCP → the transport target to actually out-latency gRPC. + +### 6.4 The protocol-level bar to beat: Cap'n Proto RPC +- Cap'n Proto RPC does what gRPC structurally cannot: **promise pipelining ("time-travel")** — the result of a call can be used as the argument to further calls *before the first returns*, collapsing dependent round-trips into one. That, not payload size, is where "faster than gRPC" is won at the protocol level. (Being quantified in the running research pass.) + +### 6.5 What this pins down in the value format *today* +- Messages must be **length-prefixed / self-delimiting** so they compose into a stream. +- Write path **forward-only where possible**, back-patching bounded to within one message → low-latency incremental encode. +- **Schema/version negotiated once per stream**, not per message → the per-message schema-hash header is elided after handshake, reclaiming those bytes. + +--- + +## 7. Sources Ranked-in tier per the research (primary = peer-reviewed paper / format author's own spec/rationale; blog = author's technical blog; secondary = reference doc). From d76b0d461273df4356ab9b00a4b9d1338ceb8167 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 18:22:54 +1000 Subject: [PATCH 07/16] Stuff --- .../rust-tooling-single-source-of-truth.md | 113 ++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 packages/web/eleventy/blog/rust-tooling-single-source-of-truth.md diff --git a/packages/web/eleventy/blog/rust-tooling-single-source-of-truth.md b/packages/web/eleventy/blog/rust-tooling-single-source-of-truth.md new file mode 100644 index 0000000..4789e51 --- /dev/null +++ b/packages/web/eleventy/blog/rust-tooling-single-source-of-truth.md @@ -0,0 +1,113 @@ +--- +title: "How Real Rust Tooling Uses typeDiagram as a Single Source of Truth: Inside Deslop and Basilisk" +date: 2026-07-09 +author: "The typeDiagram team" +description: "A case study in schema-driven development: two production Rust developer tools — Deslop, the live duplicate-code MCP/LSP server, and Basilisk, the Python type checker that scores 100% on the official typing conformance suite — generate their data models from typeDiagram .td schemas instead of hand-writing them. One model, generated algebraic data types in Rust and TypeScript, wired into cargo build, with hand-editing made structurally impossible." +permalink: "/blog/rust-tooling-single-source-of-truth/index.html" +--- + +Most posts about a code generator show you a toy schema. This one shows you two **shipping Rust developer tools** that bet their wire protocols and domain models on typeDiagram — and the house rule that made hand-writing a data model a review-blocking offence. + +The pattern is worth stealing, so here is exactly how they do it, with links to the real files. + +## The rule: generate the model, never hand-write it + +Both tools are built by [Nimblesite](https://github.com/Nimblesite), and both follow one convention their agent instructions state in capital letters — informally, **[MODEL-TYPEDIAGRAM]**: + +> Every data model — every domain type, DTO, entity, enum, and algebraic data type — MUST be defined in typeDiagram and the language types **generated** from that model. Hand-crafting a data model is forbidden. + +The reasoning is the one this blog keeps coming back to: a by-hand model has no single source of truth, so it [drifts](/blog/datetime-uuid-decimal-scalars/) across language bindings. Generate it instead and the schema is the artifact under review; the types are build output. + +## Case study 1 — Deslop: one schema, Rust **and** TypeScript + +[Deslop](https://deslop.live) is a live duplicate-code detector for AI coding agents: a long-running Rust LSP + [MCP](https://modelcontextprotocol.io) server that streams clone signals to Claude Code, Cursor, and Copilot as you type. Its LSP and MCP clients speak a JSON-RPC-style **wire protocol**, and that protocol is the classic drift hazard — the moment the Rust server and the TypeScript VS Code client disagree about a message shape, the integration breaks. + +So Deslop makes the wire protocol a single typeDiagram model. [`docs/models/live-ipc.td`](https://github.com/Nimblesite/Deslop/blob/main/docs/models/live-ipc.td) is ~535 lines describing roughly **56 types** — 49 records and 7 tagged unions — covering every request, response, and notification (`FindSimilarRequest`, `ReportChangedNotification`, `EmbeddingProgress`, `SessionConfig`, `AnalysisState`, and so on). + +That one file generates types for **both** ends of the protocol: + +| Target | Generated file | Consumed by | +| ---------- | -------------------------------------------- | -------------------------- | +| Rust | `crates/deslop-core/src/wire_generated.rs` | `deslop-lsp`, `deslop-mcp` | +| TypeScript | `clients/vscode/src/types/wire-generated.ts` | the VS Code client | + +Three details make the discipline airtight: + +1. **Generation runs on every build.** A `crates/deslop-core/build.rs` script invokes the generator before `rustc` runs, so `cargo build` can never compile against a stale model. +2. **The generated files are `.gitignore`d.** They only exist after the build script (or `make typediagram-gen`) runs — there is no committed copy for anyone to hand-edit. +3. **CI pins the generator.** The workflow installs `npm install -g typediagram@0.11.0`, so every machine generates identical output. + +Every generated file even carries a header that says so: + +```rust +//! Source: `docs/models/live-ipc.td` (typeDiagram). +//! DO NOT EDIT BY HAND. Re-run `make typediagram-gen`. +``` + +A record and a union in the model look like ordinary typeDiagram: + +``` +type FindSimilarRequest { + id: RequestId + query: FindSimilarInput + maxResults: Int +} + +union FindSimilarInput = + | ByPath { path: String } + | BySnippet { code: String; language: String } +``` + +…and come out the other side as a real Rust `struct` + `enum` (with `serde` wiring) and a matching TypeScript discriminated union — in sync by construction. + +## Case study 2 — Basilisk: surgical models with rendered diagrams + +[Basilisk](https://basilisk-python.dev) is the only Python type checker to score **100% on the official python/typing conformance suite** — a complete Rust-built Python toolchain (checker, language server, debugger, profiler) with editor extensions. It uses typeDiagram more surgically than Deslop: instead of one big schema, it keeps small, targeted models under [`models/`](https://github.com/Nimblesite/Basilisk/tree/main/models), each with a checked-in SVG under `docs/models/`. + +Three of them: + +| Model | Generates | Powers | +| -------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ | ---------------------------------------------- | +| [`stub_resolution.td`](https://github.com/Nimblesite/Basilisk/blob/main/models/stub_resolution.td) | `StubResolution`, `StubSource`, `StubTier`, `TypeProvenance` | typeshed / stub provenance in `basilisk-stubs` | +| `uv_detection.td` | `UvProjectInfo` | uv project detection in `basilisk-uv` | +| `debug_session.td` | the `DebugError` union | the debug adapter in `basilisk-lsp` | + +The debug-session model is a good example of a tagged union that would be pure boilerplate to hand-maintain across a diagram and the code: + +``` +union DebugError = + | PortAllocation + | SpawnFailed + | Timeout + | AdapterExited + | DebugpyNotFound + | PythonNotFound +``` + +The consuming Rust carries a back-reference to its source, so the link is greppable from the code: + +```rust +/// Source of truth: the typeDiagram model `models/stub_resolution.td` +/// → (typediagram --to rust models/stub_resolution.td) +``` + +Basilisk's contributor guide states the rule directly — _"Use typeDiagram markup to define models in the specs. Generate the ADTs using the typeDiagram code generator pointing at the markup"_ — and its `.vscode/extensions.json` recommends the [typeDiagram VS Code extension](https://marketplace.visualstudio.com/items?itemName=nimblesite.typediagram) so the rendered model is one click away while you edit. + +## What both teams get — and what you can steal + +Strip away the specifics and the two tools apply the same three ideas: + +- **The `.td` file is the artifact under review.** Pull requests review the schema; the generated ADTs are build output, like object files. +- **Regeneration is wired into the build.** Deslop uses `build.rs`; Basilisk regenerates via its Makefile. Either way, stale generated code cannot compile. +- **Hand-editing is designed out.** Gitignore the output, or add the "DO NOT EDIT" header and a back-reference, and there is no tempting copy to patch. + +That is [schema-driven development](https://godspeed.systems/blog/schema-driven-development-and-single-source-of-truth) with the drift removed — and because typeDiagram emits TypeScript, Python, Rust, Go, C#, F#, Dart, PHP, and Protobuf from one model, it works whether your source of truth needs to reach a Rust server, a TypeScript client, or both at once. + +## Get started + +- **CLI / library:** `npm install -g typediagram` (or `npm i typediagram-core`) +- **VS Code extension:** [install from the Marketplace](https://marketplace.visualstudio.com/items?itemName=nimblesite.typediagram) +- **Try it now:** the [playground](/#playground) runs entirely in your browser. +- **Wire it into a build** like Deslop and Basilisk: see the [Converters](/docs/converters.html) and [Language Reference](/docs/language-reference.html) docs. + +If your project generates its types from a typeDiagram model too, we would love to feature it — the more real schemas driving real toolchains, the better. From 1e46b9b6ccacc799d8f62392fb4417030fb4487b Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 18:40:47 +1000 Subject: [PATCH 08/16] stuff --- docs/plans/tdbin-implementation-plan.md | 74 ++++++ docs/specs/tdbin-rust-api.md | 137 +++++++++++ docs/specs/tdbin-wire-format.md | 308 ++++++++++++++++++++++++ 3 files changed, 519 insertions(+) create mode 100644 docs/plans/tdbin-implementation-plan.md create mode 100644 docs/specs/tdbin-rust-api.md create mode 100644 docs/specs/tdbin-wire-format.md diff --git a/docs/plans/tdbin-implementation-plan.md b/docs/plans/tdbin-implementation-plan.md new file mode 100644 index 0000000..d474788 --- /dev/null +++ b/docs/plans/tdbin-implementation-plan.md @@ -0,0 +1,74 @@ +# TDBIN Implementation Plan + +> Executes [docs/specs/tdbin-wire-format.md](../specs/tdbin-wire-format.md) + [docs/specs/tdbin-rust-api.md](../specs/tdbin-rust-api.md). +> Research basis: [docs/research/binary-format-research.md](../research/binary-format-research.md). +> First language: **Rust** (`crates/tdbin`, the workspace's first crate). TypeScript follows via golden-vector conformance. +> End state (roadmap): two-way streaming + an RPC framework (`[TDRPC-*]`) where typeDiagram `type`s are the payloads and typeDiagram **functions are the service contract** — every phase below keeps that door open (self-delimiting frames, forward-only encode, reserved capability pointer kind). + +Rules of engagement: every function/test references its `[TDBIN-*]` ID; deslop `find-similar` before authoring, `rescan` after; functions < 20 lines, files < 500 lines; no panics; `Result` everywhere; `tracing` only. + +--- + +## Phase 1 — Crate scaffold + schema model + layout engine + +- [ ] `crates/tdbin/Cargo.toml`: `[lints] workspace = true`, deps `thiserror` + `tracing`, workspace-inherited edition/license `[TDBIN-RS-CRATE]` +- [ ] Wire `cargo fmt` / `cargo clippy -- -D warnings` / `cargo llvm-cov` into `make fmt` / `make lint` / `make test` (first crate has landed — root `Cargo.toml` note + REPO-STANDARDS-SPEC `[MAKE-TARGETS]`); add Rust entry to `coverage-thresholds.json` (ratchet-only) +- [ ] Schema model: `TypeDef` / `FieldDef` / `VariantDef` / `TypeRef` `[TDBIN-RS-SCHEMA]` +- [ ] `build_schema`: validation (duplicates, unknown refs, arity, `InfiniteInline`, caps `[TDBIN-WIRE-LIMITS]`), alias expansion `[TDBIN-SCHEMA-ALIAS]`, monomorphization `[TDBIN-SCHEMA-MONO]` +- [ ] Layout engine: first-fit bit allocator `[TDBIN-REC-ALLOC]`, union variant overlap `[TDBIN-UNION-OVERLAP]`, discriminant sizing `[TDBIN-UNION-DISC]`, enum-union inlining `[TDBIN-UNION-ENUM]`, `Option` special cases `[TDBIN-PRIM-OPTION]` +- [ ] Canonical schema text + FNV-1a hash `[TDBIN-SCHEMA-CANON]` `[TDBIN-SCHEMA-HASH]` +- [ ] Test (merged, assertion-dense): layout goldens for a complex schema — exact bit offsets, pointer slots, section sizes, discriminant widths, hash values; plus every `SchemaError` variant provoked `[TDBIN-RS-ERROR]` + +## Phase 2 — Encoder + +- [ ] Word arena writer: preorder DFS allocation, in-message back-patching only `[TDBIN-ENC-ORDER]` +- [ ] Struct emission: XOR-default scalars `[TDBIN-REC-XOR]`, bit packing `[TDBIN-WIRE-WORD]`, zeroed padding + dead union slots `[TDBIN-ENC-ZERO]` +- [ ] Pointer emission: struct/list pointers, null-for-default `[TDBIN-PTR-STRUCT]` `[TDBIN-PTR-LIST]` `[TDBIN-PTR-NULL]` +- [ ] All list forms incl. composite tag word `[TDBIN-LIST-ELEM]` `[TDBIN-LIST-RAW]` `[TDBIN-LIST-COMPOSITE]` +- [ ] Primitive codecs: `DateTime`/`Uuid`/`Decimal` byte layouts `[TDBIN-PRIM-MAP]`, `Option` matrix `[TDBIN-PRIM-OPTION]` +- [ ] Framing writer `[TDBIN-MSG-FRAME]`; determinism `[TDBIN-ENC-CANON]` +- [ ] Test: encode-side of `[TDBIN-TEST-ROUNDTRIP]` + first golden vectors `[TDBIN-TEST-GOLDEN]` (byte-exact hex) + +## Phase 3 — Verifier + decoder + +- [ ] O(n) verify pass: bounds `[TDBIN-SAFE-BOUNDS]`, depth `[TDBIN-SAFE-DEPTH]`, amplification budget `[TDBIN-SAFE-AMPLIFY]`, UTF-8 `[TDBIN-SAFE-UTF8]`, all-slots validation `[TDBIN-SAFE-ZEROSLOT]`, `VerifyStats` +- [ ] Decode = verify + materialize in one pass → `Value` `[TDBIN-RS-VALUE]`; short/long structs `[TDBIN-REC-SHORT]`; `UnknownVariant` `[TDBIN-UNION-UNKNOWN]` +- [ ] Framing reader: magic/version/reserved/length/hash checks `[TDBIN-MSG-FRAME]` +- [ ] Full `DecodeError` surface `[TDBIN-RS-ERROR]`; totality `[TDBIN-RS-NOPANIC]`; `tracing` spans `[TDBIN-RS-LOG]` +- [ ] Tests: full `[TDBIN-TEST-ROUNDTRIP]` both directions; adversarial corpus `[TDBIN-TEST-EVIL]`; evolution suite `[TDBIN-TEST-EVOLVE]` + +## Phase 4 — Packing + fuzz + +- [ ] Packer/unpacker `[TDBIN-PACK-WORD]` `[TDBIN-PACK-RUNS]`, bounds-checked, output-capped +- [ ] Packed framing end-to-end (`PACKED` flag) `[TDBIN-MSG-FRAME]` +- [ ] Extend `[TDBIN-TEST-ROUNDTRIP]`/`[TDBIN-TEST-GOLDEN]`/`[TDBIN-TEST-EVIL]` with packed variants (incl. `PackedTruncated`) +- [ ] `cargo-fuzz` decode target, CI time-budgeted `[TDBIN-TEST-FUZZ]` + +## Phase 5 — The gate: benchmark vs Protobuf + +- [ ] Benchmark corpus in typeDiagram + `.proto`: diagram-model doc, union-heavy events, list-heavy dataset `[TDBIN-BENCH-CORPUS]` +- [ ] Criterion benches vs `prost`; CI-enforced gate: **size ≤ protobuf on every entry, encode+decode ≥ 1.5× prost throughput** `[TDBIN-BENCH-GATE]` +- [ ] Size assertions also live inside `[TDBIN-TEST-ROUNDTRIP]` (packed TDBIN bytes vs recorded protobuf fixture sizes) so `make test` guards the size axis even without benches +- [ ] Record baseline numbers in the bench report; regressions fail + +## Phase 6 — `.td` text pipeline (E2E per repo testing rules) + +- [ ] `crates/td-schema`: parser for the type subset of the language reference (records, unions incl. pinned/tuple variants, aliases, generics) → `TypeDef` — mirrors the TS parser's grammar; golden-parity fixtures against `packages/typediagram` parser output +- [ ] E2E tests: **diagram text → schema → encode → decode** in one black-box flow (the repo's "complex diagram text" test shape) +- [ ] CLI glue (later, `packages/cli` or a `tdbin` bin): `typediagram encode|decode|verify` — thin consumer only + +## Phase 7 — Roadmap tracks (each opens with its own spec) + +- [ ] `[TDBIN-FUTURE-READER]` zero-copy reader: `verify` once → nanosecond typed accessors (the order-of-magnitude read win, research §2) +- [ ] `[TDBIN-FUTURE-COLUMNAR]` struct-of-arrays lists: validity bitmaps, dense-union columns, SIMD-BP128 integer columns +- [ ] `[TDBIN-FUTURE-TS]` TypeScript codec in `packages/typediagram/` passing every golden vector +- [ ] `[TDBIN-FUTURE-RPC]` **`[TDRPC-*]` spec — the streaming/RPC framework**: typeDiagram function definitions → service contract; unary/server-stream/client-stream/bidi from signature shape (`f(Stream) -> Stream`); numeric method ids (no method-name strings on the wire); capability pointer kind `11`; promise pipelining; QUIC-first transport. Drafted from the dedicated RPC research pass (research §6) +- [ ] `[TDBIN-FUTURE-WIDTH-TYPES]` width-refined DSL numerics; `[TDBIN-FUTURE-ORDINALS]` explicit ordinals for non-append evolution + +## Exit criteria (v1 = phases 1–5) + +1. `make ci` green: fmt + clippy (deny-all) + tests + coverage threshold + deslop budget. +2. Golden vectors committed and byte-stable `[TDBIN-TEST-GOLDEN]`. +3. Fuzz target runs clean on CI budget `[TDBIN-TEST-FUZZ]`. +4. **Bench gate holds: smaller than Protobuf on every corpus entry AND ≥ 1.5× prost encode/decode throughput** `[TDBIN-BENCH-GATE]`. +5. `grep -r '\[TDBIN-' crates/ docs/` shows every normative ID with at least one code or test reference. diff --git a/docs/specs/tdbin-rust-api.md b/docs/specs/tdbin-rust-api.md new file mode 100644 index 0000000..e4d9383 --- /dev/null +++ b/docs/specs/tdbin-rust-api.md @@ -0,0 +1,137 @@ +# TDBIN Rust Codec Specification + +> **Status:** DRAFT v1. Companion to [tdbin-wire-format.md](tdbin-wire-format.md) — that spec defines the bytes; this one defines the first implementation: the `tdbin` crate in the Rust workspace. +> Implementation plan: [docs/plans/tdbin-implementation-plan.md](../plans/tdbin-implementation-plan.md). + +Every public behavior lives under a `[TDBIN-RS-*]` / `[TDBIN-TEST-*]` / `[TDBIN-BENCH-*]` ID; code and tests MUST reference the IDs in comments/test names so `grep '\[TDBIN-'` traces spec → code → tests. + +--- + +## [TDBIN-RS-CRATE] Crate + +- Path `crates/tdbin`, library name `tdbin`. Inherits workspace lints (`[lints] workspace = true`) — all lints deny, per root `Cargo.toml` (REPO-STANDARDS-SPEC `[LINT-RUST]`). +- Dependencies: `thiserror` (error derive), `tracing` (structured logging). Dev-dependencies: `criterion` (benches), `prost` + `prost-build` or pre-generated fixtures (the Protobuf comparison corpus, `[TDBIN-BENCH-GATE]`). +- No `unsafe`. No panics reachable from any public function on any input — `unwrap`/`expect`/`panic!`/indexing are workspace-denied; all offset arithmetic is `checked_*` and failures surface as errors (`[TDBIN-RS-NOPANIC]`). + +## [TDBIN-RS-API] Public API + +The API is plain functions returning `Result` — no classes, no builders-as-objects, no global state: + +```rust +pub fn build_schema(defs: &[TypeDef]) -> Result; +pub fn schema_hash(schema: &Schema) -> u64; // [TDBIN-SCHEMA-HASH] + +pub fn encode( + schema: &Schema, root_type: &str, value: &Value, opts: &EncodeOptions, +) -> Result, EncodeError>; + +pub fn decode( + schema: &Schema, root_type: &str, wire: &[u8], opts: &DecodeOptions, +) -> Result; + +pub fn verify( + schema: &Schema, root_type: &str, wire: &[u8], opts: &DecodeOptions, +) -> Result; // [TDBIN-SAFE] +``` + +- `decode` = verify + materialize in one O(n) pass; it MUST be safe on arbitrary untrusted bytes (`[TDBIN-SAFE]`). +- `verify` exposes the standalone pass (returns traversed-word/depth stats) for callers that will later use the zero-copy reader (`[TDBIN-FUTURE-READER]`). +- `encode` output is deterministic (`[TDBIN-ENC-CANON]`) and honors `EncodeOptions { packed: bool, framing: Framing }` with `Framing::Bare | Framing::Framed { include_hash: bool }` (`[TDBIN-MSG-FRAME]`). +- `DecodeOptions { max_body_bytes: u64, expected_hash: Option }` — depth (64) and amplification caps are wire-format constants, not options (`[TDBIN-SAFE-DEPTH]`, `[TDBIN-SAFE-AMPLIFY]`). + +## [TDBIN-RS-SCHEMA] Schema model + +`TypeDef` mirrors the typeDiagram language reference exactly (records, unions with bare/named-field/tuple variants and optional pinned discriminants, aliases, generics): + +```rust +pub enum TypeDef { + Record { name: String, params: Vec, fields: Vec }, + Union { name: String, params: Vec, variants: Vec }, + Alias { name: String, params: Vec, target: TypeRef }, +} +pub struct FieldDef { pub name: String, pub ty: TypeRef } +pub struct VariantDef { pub name: String, pub fields: Vec, pub pinned: Option } +pub enum TypeRef { + Bool, Int, Float, Str, Bytes, Unit, DateTime, Uuid, Decimal, + Option(Box), List(Box), + Named { name: String, args: Vec }, + Param(String), +} +``` + +`build_schema` validates (duplicate names, unknown references, arity, recursion only through pointer types, union size caps), **monomorphizes** all reachable generic instantiations (`[TDBIN-SCHEMA-MONO]`), expands aliases (`[TDBIN-SCHEMA-ALIAS]`), and precomputes every layout via `[TDBIN-REC-ALLOC]` / `[TDBIN-UNION-OVERLAP]`. Layout computation happens once here — never during encode/decode. Tuple-variant payload fields get positional names `"0"`, `"1"`, …. + +The `.td` text → `TypeDef` parser is a separate deliverable (`crates/td-schema`, plan phase); `tdbin` itself is parser-agnostic. + +## [TDBIN-RS-VALUE] Dynamic value model + +v1 is schema-driven and dynamic (static codegen comes later): + +```rust +pub enum Value { + Unit, + Bool(bool), Int(i64), Float(f64), + Str(String), Bytes(Vec), + DateTime(i64), // µs since Unix epoch, UTC [TDBIN-PRIM-MAP] + Uuid([u8; 16]), Decimal([u8; 16]), + Option(Option>), + List(Vec), + Record { fields: Vec<(String, Value)> }, + Union { variant: String, fields: Vec<(String, Value)> }, +} +``` + +- `Record.fields` may omit fields (encode as default) and may appear in any order; unknown field names are an `EncodeError`. +- Enum-unions are `Value::Union` with empty `fields` — one uniform shape. +- `decode` materializes every field the reader's schema knows, applying defaults for short structs (`[TDBIN-REC-SHORT]`); an unknown discriminant is `DecodeError::UnknownVariant` (`[TDBIN-UNION-UNKNOWN]`). + +## [TDBIN-RS-ERROR] Errors + +Four `#[non_exhaustive]` `thiserror` enums; every variant carries actionable context and no payload data: + +- `SchemaError` — `DuplicateType`, `UnknownType`, `ArityMismatch`, `InfiniteInline` (recursion not through a pointer), `TooManyVariants`, `TooManyFields` (section caps, `[TDBIN-WIRE-LIMITS]`). +- `EncodeError` — `TypeMismatch { type_name, field, expected, got }`, `UnknownField`, `UnknownRoot`, `LimitExceeded`, `InvalidDecimal`. +- `DecodeError` — `BadMagic`, `BadVersion`, `ReservedBits`, `LengthMismatch`, `HashMismatch { expected, got }`, `PointerOutOfBounds { word_index }`, `ReservedPointerKind`, `DepthExceeded`, `AmplificationExceeded`, `MalformedCompositeTag`, `InvalidUtf8 { word_index }`, `UnknownVariant { type_name, ordinal }`, `PackedTruncated`, `LimitExceeded`. +- Failures are values; no `Err` path may allocate unboundedly or log payload bytes. + +## [TDBIN-RS-NOPANIC] Totality + +`encode`, `decode`, `verify` are **total**: for every input — any schema accepted by `build_schema`, any `Value`, any byte slice — they return `Ok` or `Err`, never panic, never loop unboundedly (traversal budget `[TDBIN-SAFE-AMPLIFY]` bounds decode; value size bounds encode). Control flow is `match`/combinators per repo style — no bare `if` chains. + +## [TDBIN-RS-LOG] Logging + +`tracing` spans at `debug` on `encode`/`decode`/`verify` entry/exit with structured fields only — `{ root_type, wire_bytes, words_traversed, packed }`. Never payload contents, never string values (PII rule). Errors log at `warn` with the error variant name and offsets. + +--- + +## [TDBIN-TEST] Testing (per repo testing rules: few, huge, E2E-style tests) + +Tests are black-box over the public API, deterministic, assertion-dense, and merged (no per-assertion splitting). Each test name references its spec ID. + +### [TDBIN-TEST-ROUNDTRIP] +One comprehensive round-trip test per schema corpus entry: build a **complex** schema (nested records, a recursive tree, every primitive, unions with bare + named + tuple + pinned variants, the full `Option` matrix, `List>`, generics `Pair`/`Result`, unicode strings, empty lists/strings) → `encode` (bare, framed, packed × unpacked) → `verify` → `decode` → deep-equality with the input, PLUS in the same test: exact expected byte lengths, packed ≤ unpacked, defaults round-trip as `None`/zero, field-order-independence of `Record.fields`, and re-encode determinism (`[TDBIN-ENC-CANON]`). + +### [TDBIN-TEST-GOLDEN] +Golden vectors: for each corpus schema+value, the exact wire bytes as hex fixtures asserted byte-for-byte both directions. These fixtures are the future cross-language conformance suite (`[TDBIN-FUTURE-TS]`) — they MUST never change without a wire-format version bump. + +### [TDBIN-TEST-EVIL] +Adversarial corpus, all asserting **typed errors, never panics**: truncation at every byte boundary of a golden message; every pointer field perturbed (offset out of bounds, reserved kinds, oversized sections); composite tag count mismatches; depth bombs (> 64); amplification bombs (aliased fan-out); invalid UTF-8; packed streams truncated mid-run; wrong magic/version/hash; unknown discriminants (asserting `UnknownVariant` specifically). + +### [TDBIN-TEST-EVOLVE] +Evolution suite: encode with schema v1, decode with v1+appended-field / appended-variant schema (defaults surface, `[TDBIN-EVOLVE-APPEND]`) and the reverse (extra data ignored, `[TDBIN-REC-SHORT]`); plus a width-crossing case asserting the documented breaking behavior (`[TDBIN-EVOLVE-WIDTH]` — hash mismatch on framed messages). + +### [TDBIN-TEST-FUZZ] +`cargo-fuzz` target: `decode(arbitrary bytes)` on a fixed corpus schema — no panics, no timeouts, no OOM (bounded by `DecodeOptions`). Run in CI on a time budget. + +--- + +## [TDBIN-BENCH] The gate that makes "smaller AND faster than Protobuf" enforceable + +### [TDBIN-BENCH-CORPUS] +A fixed benchmark corpus of ≥ 3 realistic payload shapes defined in **both** typeDiagram and `.proto`: (a) a record-heavy document (typeDiagram's own diagram model), (b) a union-heavy event stream (many small tagged messages), (c) a list-heavy dataset (structs with numeric/string columns). Same logical values on both sides. + +### [TDBIN-BENCH-GATE] +Criterion benches comparing `tdbin` against `prost` on the corpus. The gate (CI-checked, not vibes): +- **Size:** TDBIN packed framed bytes ≤ Protobuf encoded bytes on every corpus entry. +- **Speed:** TDBIN `encode` and `decode` each ≥ 1.5× the throughput of prost's on every corpus entry (target headroom; the roadmap zero-copy reader raises this to order-of-magnitude on reads, research §2). +- Regressions against the recorded baseline fail the build. Numbers are recorded in the bench report committed with the change. diff --git a/docs/specs/tdbin-wire-format.md b/docs/specs/tdbin-wire-format.md new file mode 100644 index 0000000..ed19775 --- /dev/null +++ b/docs/specs/tdbin-wire-format.md @@ -0,0 +1,308 @@ +# TDBIN Wire Format Specification + +> **Status:** DRAFT v1 — normative spec derived from [docs/research/binary-format-research.md](../research/binary-format-research.md). +> **Scope:** the language-neutral binary wire format for typeDiagram ADTs (records + tagged unions). The Rust codec API is specified in [tdbin-rust-api.md](tdbin-rust-api.md); the implementation plan is [docs/plans/tdbin-implementation-plan.md](../plans/tdbin-implementation-plan.md). +> **Goal (non-negotiable):** smaller AND faster than Protobuf, measured by the bench gate `[TDBIN-BENCH-GATE]` (Rust API spec). +> **Design thesis (research §0):** schema-known fixed layout (no field tags → smaller) + zero-parse/verify-on-access (no decode materialization → faster) + XOR-default word-packing (reclaims zero-copy padding → smaller again). +> **Roadmap constraint:** TDBIN will carry **bidirectional streaming and an RPC framework** (research §6). Every message is therefore self-delimiting, the encoder is forward-only between messages, and a pointer kind is reserved for RPC capabilities. + +All statements marked **MUST** are normative. Every normative rule lives under a spec ID; code and tests reference these IDs so `grep '\[TDBIN-'` traces spec → code → tests. + +--- + +## [TDBIN-WIRE] Ground rules + +### [TDBIN-WIRE-WORD] +- The unit of layout is the **word**: 8 bytes. +- All multi-byte values MUST be **little-endian**. Bit fields MUST use **little-endian bit order** (bit 0 = least-significant bit of the byte at the lowest address). +- Every object (struct body, list body) MUST begin on a word boundary within the message body. + +### [TDBIN-WIRE-LIMITS] +Hard limits; a message exceeding any of them is invalid: +| Limit | Value | Where enforced | +|---|---|---| +| Body size | ≤ 2³² − 1 bytes | `[TDBIN-MSG-FRAME]` | +| Struct data section | ≤ 2¹⁶ − 1 words | `[TDBIN-PTR-STRUCT]` | +| Struct pointer section | ≤ 2¹⁶ − 1 slots | `[TDBIN-PTR-STRUCT]` | +| List element count | ≤ 2²⁹ − 1 | `[TDBIN-PTR-LIST]` | +| Composite list total | ≤ 2²⁹ − 1 words | `[TDBIN-LIST-COMPOSITE]` | +| Pointer depth | ≤ 64 | `[TDBIN-SAFE-DEPTH]` | +| Union variants | ≤ 2¹⁶ | `[TDBIN-UNION-DISC]` | + +--- + +## [TDBIN-MSG] Message envelope + +### [TDBIN-MSG-BARE] +A **bare message** is a sequence of words. Word 0 MUST be the **root pointer**: a struct pointer (`[TDBIN-PTR-STRUCT]`) to the root object. All pointer targets MUST lie within the message body (single segment in v1; multi-segment far pointers are reserved, `[TDBIN-PTR-RESERVED]`). + +### [TDBIN-MSG-FRAME] +A **framed message** wraps a bare (optionally packed) body for transport and streams: + +| Offset | Size | Field | Rule | +|---|---|---|---| +| 0 | 4 | magic | bytes `0x54 0x44 0x42 0x31` (`"TDB1"`) | +| 4 | 1 | version | `1` | +| 5 | 1 | flags | bit 0 `PACKED` (`[TDBIN-PACK]`), bit 1 `HASH`; other bits MUST be 0 | +| 6 | 2 | reserved | MUST be 0 | +| 8 | 4 | body_len | u32 LE, byte length of `body` **as it appears on the wire** (post-packing when `PACKED`) | +| 12 | 8 | schema_hash | u64 LE (`[TDBIN-SCHEMA-HASH]`); present iff `HASH` flag set | +| 12 or 20 | body_len | body | bare message, packed when `PACKED` | + +Readers MUST reject wrong magic, unknown version, nonzero reserved bits/fields, and `body_len` disagreeing with available bytes. + +### [TDBIN-MSG-STREAM] +Framing is what makes the RPC/streaming roadmap work (research §6.5): messages are self-delimiting via `body_len`, so they concatenate into a stream with no delimiters. On a stream, the schema hash MUST be negotiated **once per stream** (first frame carries `HASH`; subsequent frames elide it). Stream-level concerns (multiplexing, flow control, method dispatch, promise pipelining) belong to the future `[TDRPC-*]` spec, not this one — but this envelope is the frame it will carry. + +--- + +## [TDBIN-PTR] Pointers + +A pointer is one word. Bits 0–1 select the kind: `00` struct, `01` list, `10`/`11` reserved. + +### [TDBIN-PTR-NULL] +An all-zero word in a pointer slot is the **null pointer**: the field takes its schema default (empty string/bytes/list, default record, `None`). Writers MUST encode absent pointer fields as null. + +### [TDBIN-PTR-STRUCT] +| Bits | Field | Meaning | +|---|---|---| +| 0–1 | kind | `00` | +| 2–31 | offset | signed 30-bit count of **words** from the end of the pointer word to the start of the target's data section | +| 32–47 | data_words | u16: size of the data section in words | +| 48–63 | ptr_words | u16: number of pointer slots following the data section | + +The target object is `data_words` words of scalar data followed by `ptr_words` pointer words. + +### [TDBIN-PTR-LIST] +| Bits | Field | Meaning | +|---|---|---| +| 0–1 | kind | `01` | +| 2–31 | offset | signed 30-bit words from end of pointer word to first element (or to the tag word for composite) | +| 32–34 | elem | element kind, table below | +| 35–63 | count | u29: element count, EXCEPT composite (`elem=7`): total words excluding the tag word | + +| elem | Element | Used by | +|---|---|---| +| 0 | void (0 bits) | `List` | +| 1 | 1 bit | `List` (bit-packed, `[TDBIN-WIRE-WORD]` bit order) | +| 2 | 1 byte | `String`, `Bytes`, `List` (`[TDBIN-LIST-ELEM]`) | +| 3 | 2 bytes | reserved for width-refined ints (`[TDBIN-FUTURE-WIDTH-TYPES]`) | +| 4 | 4 bytes | reserved for width-refined ints/floats | +| 5 | 8 bytes | `List`, `List`, `List` | +| 6 | pointer | `List`, `List`, `List>`, `List`, `List` | +| 7 | composite | inline struct elements (`[TDBIN-LIST-COMPOSITE]`) | + +List bodies MUST be zero-padded to a word boundary. + +### [TDBIN-PTR-RESERVED] +Kind `10` is reserved for **far pointers** (multi-segment messages). Kind `11` is reserved for **capabilities** (the RPC layer's remote-object references — research §6.4 promise pipelining). Readers MUST reject reserved kinds in v1. + +--- + +## [TDBIN-PRIM] Primitive types (DSL → wire) + +### [TDBIN-PRIM-MAP] +typeDiagram built-ins map to exactly these wire representations: + +| DSL | Wire | Width | +|---|---|---| +| `Bool` | 1 bit in the data section | 1 bit | +| `Int` | two's-complement i64 LE | 64 bits | +| `Float` | IEEE-754 binary64 LE | 64 bits | +| `String` | pointer → byte list, UTF-8, **no NUL terminator** | ptr slot | +| `Bytes` | pointer → byte list | ptr slot | +| `Unit` | nothing (zero bits, no slot) | 0 | +| `DateTime` | i64 LE microseconds since Unix epoch, UTC | 64 bits | +| `Uuid` | 16 bytes, RFC 4122 big-endian byte order (the canonical textual order) | 128 bits | +| `Decimal` | 16 bytes: i96 LE unsigned mantissa (bytes 0–11), scale u8 (byte 12, 0–28), flags u8 (byte 13, bit 7 = sign), bytes 14–15 zero | 128 bits | +| enum-union (`[TDBIN-UNION-ENUM]`) | discriminant bit field | 1/2/4/8/16 bits | + +`String` payloads MUST be valid UTF-8 (`[TDBIN-SAFE-UTF8]`). Width-refined numeric DSL types (`I8…U64`, `F32`) are a schema-language extension (`[TDBIN-FUTURE-WIDTH-TYPES]`); the wire format already reserves their widths and list element kinds. + +### [TDBIN-PRIM-OPTION] +`Option` is built in and layout-frozen (it can never evolve, so inlining is safe — the exception to `[TDBIN-UNION-STRUCT]`): +- **T is pointer-typed** (String, Bytes, List, record, union): the field is one pointer slot; **null pointer = `None`**. Zero overhead. +- **T is scalar** (Bool, Int, Float, DateTime, Uuid, Decimal, enum): a 1-bit **presence flag** plus a T-width value slot, both allocated by `[TDBIN-REC-ALLOC]` in that order. Presence 0 ⇒ `None` and the value slot MUST be zero. +- **T is `Unit`**: presence bit only. +- **T is itself `Option`**: the inner `Option` is encoded via the general union path (pointer to an `Option` union struct). +- In `List>`, each element is the inline group `{present: 1 bit, value: T}` encoded as a composite list element (scalar T) or a pointer list with nulls (pointer T). Columnar validity bitmaps supersede this in `[TDBIN-FUTURE-COLUMNAR]`. + +--- + +## [TDBIN-REC] Records (product types) + +### [TDBIN-REC-SECTIONS] +A record encodes as a struct: a **data section** (bit-packed scalars) followed by a **pointer section** (one word per pointer field), per `[TDBIN-PTR-STRUCT]`. Nested record- and union-typed fields are **pointer-typed** — always a separate struct reached by pointer, never inlined. This keeps every type's layout independent (evolution) and makes recursive types (trees, lists) representable. + +### [TDBIN-REC-ALLOC] +Field positions are a **pure function of the schema** — no tags on the wire. The layout algorithm: + +1. Assign each field an **ordinal** = its declaration index (0-based, textual order). +2. Process fields in ordinal order. Classify each as **scalar** (width w bits, w ∈ {1, 2, 4, 8, 16, 32, 64, 128}), **pointer**, or **Unit** (no allocation). `Option` allocates its presence bit (w=1) then its value slot, in that order. +3. **Scalar:** allocate the lowest bit offset that is a multiple of w and does not overlap any previously allocated interval. +4. **Pointer:** allocate the next sequential pointer slot (0, 1, 2, …). +5. Data section size = ⌈(highest allocated bit end) / 64⌉ words; pointer section size = pointer slots allocated. Unused bits/bytes MUST be zero. + +Determinism of this algorithm is what golden vectors (`[TDBIN-TEST-GOLDEN]`) pin down. + +### [TDBIN-REC-XOR] +Every scalar field is stored **XOR'd with the w-bit representation of its schema default**. typeDiagram currently defines all defaults as the zero value, so today's stored bytes equal the raw values — but the XOR rule is normative now so a future DSL default-value annotation changes no wire logic, and defaulted fields always encode as zeros that `[TDBIN-PACK]` deletes (research §3.4). + +### [TDBIN-REC-SHORT] +Readers MUST accept a struct whose `data_words`/`ptr_words` are **smaller or larger** than the reader's schema expects. Fields beyond the actual sections read as default (all-zero ⇒ XOR gives the default). Extra sections are ignored on read but MUST be preserved by the verifier's bounds accounting. This is what makes `[TDBIN-EVOLVE-APPEND]` bidirectionally compatible. + +--- + +## [TDBIN-UNION] Tagged unions (sum types) + +### [TDBIN-UNION-STRUCT] +A named `union` type encodes as a struct of its own (reached by pointer, like any record): a **discriminant** bit field allocated first, then each variant's payload fields. There are no other fields in a union struct. + +### [TDBIN-UNION-DISC] +- The discriminant value is the variant's **declaration ordinal** (0-based). DSL-pinned values (`ParseError = -32700`) are a codegen-surface mapping and MUST NOT appear on the wire. +- Discriminant width = the smallest w ∈ {1, 2, 4, 8, 16} with 2ʷ ≥ capacity, where **capacity** = variant count (or a schema-declared reserved capacity ≥ variant count, once the schema language grows a reserve annotation — until then capacity = variant count). A 2-variant union costs **1 bit**; ≤ 4 variants cost 2 bits (research §3.3 — vs Protobuf's ≥ 2 bytes for `oneof`). +- More than 2¹⁶ variants is a schema error. + +### [TDBIN-UNION-OVERLAP] +Variant payload fields are laid out by `[TDBIN-REC-ALLOC]` with one change: intervals and pointer slots allocated by **other variants of the same union are treated as free** (only one variant is ever live). Allocation order is global and deterministic: variants in declaration order, fields within a variant in declaration order. Tuple-form payloads (`Number(Int)`) are positional fields ordinal 0, 1, …. Writers MUST zero all slots belonging to inactive variants (`[TDBIN-SAFE-ZEROSLOT]`). + +### [TDBIN-UNION-ENUM] +A union whose variants are **all bare** (no payloads) is an **enum-union**: it is NOT pointer-encoded. As a field it inlines directly into the parent's data section as a scalar of the discriminant width; in lists it occupies 1 byte per element (`[TDBIN-LIST-ELEM]`). Its width is a pure function of its own definition, so parents' layouts shift only if the enum's width changes — governed by `[TDBIN-EVOLVE-WIDTH]`. + +### [TDBIN-UNION-UNKNOWN] +A discriminant ≥ the reader's known variant count (a newer writer) is **not** a structural error: the verifier MUST still pass the message (all pointer slots are verified regardless of liveness, `[TDBIN-SAFE-ZEROSLOT]`), and decode MUST surface a typed `UnknownVariant { type_name, ordinal }` error — never a panic, never silent misreading. + +--- + +## [TDBIN-LIST] Lists + +### [TDBIN-LIST-ELEM] +- `List`: elem 1, bit-packed. +- `List / List / List`: elem 5, raw 8-byte values. +- `List / List`: composite (elem 7) with data_words = 2, ptr_words = 0. +- `List`: elem 2, one byte per element, value = discriminant ordinal (sub-byte packing for enum columns arrives with `[TDBIN-FUTURE-COLUMNAR]`). +- `String`/`Bytes` are byte lists (elem 2). +- Lists of pointer-typed elements: elem 6. +- `List` and `List`: composite, `[TDBIN-LIST-COMPOSITE]`. + +### [TDBIN-LIST-RAW] +List elements are stored **raw** — `[TDBIN-REC-XOR]` does NOT apply inside list bodies (uniform elements keep the SIMD path branch-free; research §1 Regime C: keep the decode path uniform). + +### [TDBIN-LIST-COMPOSITE] +A composite list body begins with one **tag word** shaped like a struct pointer (`[TDBIN-PTR-STRUCT]`) whose offset field instead holds the **element count**; its `data_words`/`ptr_words` give every element's struct size. Elements follow back-to-back, each `data_words + ptr_words` words. The list pointer's count field holds total words excluding the tag word, which MUST equal element count × (data_words + ptr_words). + +--- + +## [TDBIN-PACK] Wire packing (the size-recovery layer) + +Applied to the whole body when the `PACKED` flag is set (research §3.4 — worst case 2 bytes per 2 KiB; deletes the zeros produced by padding + XOR-default). It is the Cap'n Proto packing scheme: + +### [TDBIN-PACK-WORD] +Each word becomes: 1 **tag byte** — bit n set ⇔ byte n of the word is nonzero — followed by the nonzero bytes only, in order. + +### [TDBIN-PACK-RUNS] +- Tag `0x00` is followed by one count byte N: N **additional** all-zero words follow the current zero word (run of N+1 zero words total). +- Tag `0xFF` is followed by the word's 8 literal bytes, then one count byte N, then N words verbatim (uncompressible run passthrough). + +Unpackers MUST bounds-check every read, MUST cap output at the decoder's configured limit, and MUST reject packed streams that end mid-element. Block compression (zstd/Snappy) MUST NOT be part of this format (research §3.6: up to 4.2× scan penalty) — it may only ever be an explicit outer transport layer. + +--- + +## [TDBIN-EVOLVE] Schema evolution (no tags, still compatible) + +The evolution invariant (research §3.7): **a field's position and width depend only on its own definition and lower-ordinal definitions.** Any schema change preserving all previously assigned positions/widths is **wire-compatible**; both directions work because short/long structs read correctly (`[TDBIN-REC-SHORT]`) and absent fields decode to defaults (`[TDBIN-REC-XOR]`). + +### [TDBIN-EVOLVE-APPEND] +Compatible changes: +- **Append a field at the end of a record.** New allocations come after all existing ones (they may land in existing padding — that is the point). +- **Append a bare or payload-carrying variant at the end of a union**, provided the discriminant width does not change (`[TDBIN-EVOLVE-WIDTH]`). +- **Rename** a type, field, or variant (layout is positional; this breaks source compatibility only). +- Add whole new types. + +### [TDBIN-EVOLVE-BREAKING] +Breaking changes (MUST bump the schema major version; the schema hash changes and readers reject mismatched framed messages): +- Remove or reorder fields or variants; insert anywhere but the end. +- Change any field's type. +- Add a field to an **existing** union variant (it would reorder the global allocation sequence of `[TDBIN-UNION-OVERLAP]`). Per-declaration explicit ordinals are the future escape hatch (`[TDBIN-FUTURE-ORDINALS]`). +- Change a default value (stored XOR'd — old data would re-read wrong). + +### [TDBIN-EVOLVE-WIDTH] +Growing a union/enum past its discriminant-width capacity (e.g. variant 5 of a 4-capacity union) changes the width and therefore every dependent layout: **breaking**. Schemas expecting growth should declare reserved capacity (`[TDBIN-UNION-DISC]`). + +--- + +## [TDBIN-SCHEMA] Schema identity + +### [TDBIN-SCHEMA-MONO] +Generic types (`Pair`, `Option`, `List`, `Result`) are **monomorphized** at schema-build time: every concrete instantiation reachable from a root type gets its own layout. Generics never appear on the wire. + +### [TDBIN-SCHEMA-ALIAS] +`alias` is transparent: `alias Email = String` encodes exactly as `String` and does not contribute to the schema hash beyond its expansion. + +### [TDBIN-SCHEMA-HASH] +The schema hash is **FNV-1a 64-bit** (offset basis `0xcbf29ce484222325`, prime `0x100000001b3`) over the UTF-8 bytes of the canonical schema text `[TDBIN-SCHEMA-CANON]`. + +### [TDBIN-SCHEMA-CANON] +Canonical schema text: all reachable monomorphized types, aliases expanded, sorted by type name (byte-wise), each rendered with no whitespace as +`type Name{field:Type,…}` / `union Name{Variant{field:Type,…},Bare,…}` +with fields and variants in ordinal order and type references themselves canonical (monomorphized names render as `Name`). Two schemas are identical for framing purposes iff their canonical texts are byte-equal. + +--- + +## [TDBIN-ENC] Encoding rules (writer obligations) + +### [TDBIN-ENC-ORDER] +The encoder allocates the root struct first, then children in a **preorder DFS following ordinal order**, appending each object after all previously allocated words. Pointer back-patching is bounded to **within the current message** — the write path stays forward-only *between* messages (streaming constraint, research §6.1/§6.5). + +### [TDBIN-ENC-CANON] +Encoding is **deterministic**: identical (schema, value) pairs MUST produce byte-identical bare bodies. This is required for golden vectors and reproducible hashes. + +### [TDBIN-ENC-ZERO] +All unallocated padding, dead union-variant slots, and list tail padding MUST be written as zero — for `[TDBIN-PACK]` efficiency, deterministic output, and so the verifier can validate every pointer slot without knowing union liveness. + +--- + +## [TDBIN-SAFE] Verification (untrusted input) + +Verification is a **single O(n) pass** (research §3.8). Decode always verifies; a trusted-path zero-copy reader (`[TDBIN-FUTURE-READER]`) may rely on a prior explicit verify. The verifier proves the buffer is **safe to read** — it does not prove the buffer is the *intended* value (a wrong-typed buffer passing the schema hash check can still decode to garbage values; the hash is the type check, `[TDBIN-MSG-FRAME]`). + +### [TDBIN-SAFE-BOUNDS] +Every pointer's full target range (data + pointer sections; list body incl. composite tag) MUST lie within the message body. All arithmetic MUST be overflow-checked. Reserved pointer kinds and malformed composite tags (`[TDBIN-LIST-COMPOSITE]` count equation) MUST be rejected. + +### [TDBIN-SAFE-DEPTH] +Pointer traversal depth is capped at **64**; deeper messages are rejected (recursion-bomb DoS, research §3.8). + +### [TDBIN-SAFE-AMPLIFY] +Total traversed words MUST NOT exceed the body's word count. Aliased pointers (two pointers into the same region) are structurally readable but exceed this budget under fan-out abuse (DAG amplification bombs) and MUST be rejected. + +### [TDBIN-SAFE-UTF8] +Every `String` payload is UTF-8-validated during the verify pass, so post-verify access never re-validates. + +### [TDBIN-SAFE-ZEROSLOT] +The verifier validates **every** non-null pointer slot in every struct, live or not — legal because writers zero dead slots (`[TDBIN-ENC-ZERO]`). Unknown union discriminants are not rejected (`[TDBIN-UNION-UNKNOWN]`). + +--- + +## [TDBIN-FUTURE] Reserved forward paths (not in v1) + +- **[TDBIN-FUTURE-COLUMNAR]** — struct-of-arrays encoding for `List` / `List` (dense-union columns, validity bitmaps, SIMD-BP128 bit-packed integer columns; research §3.3/§3.5, the 13%-smaller + SIMD-scannable regime). Will occupy a new list element kind or flag. +- **[TDBIN-FUTURE-READER]** — zero-copy verify-once/access-lazily reader (nanosecond field access; research §2.4). +- **[TDBIN-FUTURE-RPC]** — the `[TDRPC-*]` spec: typeDiagram **function definitions as the service contract** (research §6.0), streaming modes from signature shape, numeric method ids (no method-name strings on the wire), capability pointers (kind `11`), promise pipelining. Fed by the dedicated RPC research pass. +- **[TDBIN-FUTURE-TS]** — TypeScript codec in `packages/typediagram/` implementing this spec byte-for-byte (golden vectors are the conformance suite). +- **[TDBIN-FUTURE-WIDTH-TYPES]** — width-refined DSL numerics (`I8…U64`, `F32`); wire widths and list element kinds already reserved. +- **[TDBIN-FUTURE-ORDINALS]** — explicit per-declaration ordinal annotations to allow non-append evolution (Cap'n Proto-style). + +## Decision trace (research → spec) + +| Decision | Research anchor | +|---|---| +| No field tags; layout from schema | §0 tax #1, §3.7 `[S10]` | +| Struct = data + pointer sections, word-aligned | §3.1 `[S10]` | +| XOR-with-default scalars | §3.4 `[S10]` | +| Sub-byte discriminants (⌈log₂N⌉ → pow2 width) | §3.3 `[S21]`, §4.3 | +| Dense payloads, variant overlap | §3.3 `[S5][S6]` | +| Word packing, no block compression | §3.4 `[S10]`, §3.6 `[S12]` | +| Verify O(n) + depth + amplification caps | §3.8 `[S24][S25]` | +| Fixed-width scalars, no scalar varints in v1 | §3.2 (branch mispredicts `[S11]`), §5 Q3 | +| Length-prefixed self-delimiting frames | §6.2/§6.5 | +| Append-only evolution into padding | §3.7 `[S10]` | From 19223c78df9dbbcf3df5ff641dc5e48eb74c81a2 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 19:49:45 +1000 Subject: [PATCH 09/16] tdbin --- Cargo.lock | 7 + crates/tdbin/Cargo.toml | 14 ++ crates/tdbin/src/error.rs | 93 ++++++++++ crates/tdbin/src/layout.rs | 36 ++++ crates/tdbin/src/lib.rs | 86 +++++++++ crates/tdbin/src/pointer.rs | 137 ++++++++++++++ crates/tdbin/src/reader.rs | 200 ++++++++++++++++++++ crates/tdbin/src/scalar.rs | 39 ++++ crates/tdbin/src/writer.rs | 189 +++++++++++++++++++ crates/tdbin/tests/roundtrip.rs | 311 ++++++++++++++++++++++++++++++++ 10 files changed, 1112 insertions(+) create mode 100644 Cargo.lock create mode 100644 crates/tdbin/Cargo.toml create mode 100644 crates/tdbin/src/error.rs create mode 100644 crates/tdbin/src/layout.rs create mode 100644 crates/tdbin/src/lib.rs create mode 100644 crates/tdbin/src/pointer.rs create mode 100644 crates/tdbin/src/reader.rs create mode 100644 crates/tdbin/src/scalar.rs create mode 100644 crates/tdbin/src/writer.rs create mode 100644 crates/tdbin/tests/roundtrip.rs diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..7d52ce5 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,7 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 4 + +[[package]] +name = "tdbin" +version = "0.0.0" diff --git a/crates/tdbin/Cargo.toml b/crates/tdbin/Cargo.toml new file mode 100644 index 0000000..68c508c --- /dev/null +++ b/crates/tdbin/Cargo.toml @@ -0,0 +1,14 @@ +# [TDBIN-RS-CRATE] TDBIN v0 runtime: the compact binary codec that generated +# typeDiagram ADT code targets. Zero external deps so it builds offline; the +# `thiserror`/`tracing` wiring lands with the logging pass ([TDBIN-RS-LOG]). +[package] +name = "tdbin" +version = "0.0.0" +edition.workspace = true +license.workspace = true +repository.workspace = true +description = "TDBIN v0: compact binary codec runtime for typeDiagram algebraic data types." +publish = false + +[lints] +workspace = true diff --git a/crates/tdbin/src/error.rs b/crates/tdbin/src/error.rs new file mode 100644 index 0000000..9ec0b42 --- /dev/null +++ b/crates/tdbin/src/error.rs @@ -0,0 +1,93 @@ +//! Error types for the TDBIN codec. Failures are values, never panics +//! ([TDBIN-RS-NOPANIC]); no variant carries payload bytes ([TDBIN-RS-ERROR]). + +use core::fmt; + +/// Errors returned while encoding a typed value to TDBIN bytes. +#[derive(Debug, Clone, PartialEq, Eq)] +#[non_exhaustive] +pub enum EncodeError { + /// A section, offset, or message exceeded a wire-format limit + /// ([TDBIN-WIRE-LIMITS]). + LimitExceeded, + /// A relative pointer offset did not fit the signed 30-bit field + /// ([TDBIN-PTR-STRUCT]). + OffsetOutOfRange, +} + +impl fmt::Display for EncodeError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + let msg = match self { + Self::LimitExceeded => "value exceeds a TDBIN wire-format limit", + Self::OffsetOutOfRange => "pointer offset does not fit the signed 30-bit field", + }; + f.write_str(msg) + } +} + +impl std::error::Error for EncodeError {} + +/// Errors returned while decoding TDBIN bytes to a typed value. Safe on +/// arbitrary untrusted input ([TDBIN-SAFE]). +#[derive(Debug, Clone, PartialEq, Eq)] +#[non_exhaustive] +pub enum DecodeError { + /// Wire length was zero or not a multiple of the 8-byte word size. + BadLength, + /// A pointer referenced a word outside the message body + /// ([TDBIN-SAFE-BOUNDS]). + PointerOutOfBounds { + /// Word index that was out of range. + word_index: usize, + }, + /// A pointer used a reserved kind (far / RPC), invalid in v0 + /// ([TDBIN-PTR-RESERVED]). + ReservedPointerKind, + /// A pointer slot held a kind the field's type does not permit. + PointerKindMismatch, + /// Struct nesting exceeded the depth cap ([TDBIN-SAFE-DEPTH]). + DepthExceeded, + /// Traversal exceeded the amplification budget ([TDBIN-SAFE-AMPLIFY]). + AmplificationExceeded, + /// A string field held bytes that were not valid UTF-8 + /// ([TDBIN-SAFE-UTF8]). + InvalidUtf8, + /// A decoded count or length exceeded an addressable limit + /// ([TDBIN-WIRE-LIMITS]). + LimitExceeded, + /// A union discriminant had no matching variant ([TDBIN-UNION-UNKNOWN]). + UnknownVariant { + /// The unrecognized discriminant ordinal. + ordinal: u64, + }, + /// A non-optional pointer field was null where a value was required. + UnexpectedNull, + /// The root pointer was null. + NullRoot, +} + +impl fmt::Display for DecodeError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::BadLength => f.write_str("wire length is zero or not word-aligned"), + Self::PointerOutOfBounds { word_index } => { + write!(f, "pointer references out-of-bounds word {word_index}") + } + Self::ReservedPointerKind => f.write_str("pointer used a reserved kind"), + Self::PointerKindMismatch => f.write_str("pointer kind does not match the field type"), + Self::DepthExceeded => f.write_str("struct nesting exceeded the depth cap"), + Self::AmplificationExceeded => { + f.write_str("traversal exceeded the amplification budget") + } + Self::InvalidUtf8 => f.write_str("string field held invalid UTF-8"), + Self::LimitExceeded => f.write_str("decoded count exceeds an addressable limit"), + Self::UnknownVariant { ordinal } => { + write!(f, "union discriminant {ordinal} has no variant") + } + Self::UnexpectedNull => f.write_str("required pointer field was null"), + Self::NullRoot => f.write_str("root pointer was null"), + } + } +} + +impl std::error::Error for DecodeError {} diff --git a/crates/tdbin/src/layout.rs b/crates/tdbin/src/layout.rs new file mode 100644 index 0000000..a8f6572 --- /dev/null +++ b/crates/tdbin/src/layout.rs @@ -0,0 +1,36 @@ +//! Shared word/offset arithmetic used by both the encoder and decoder, +//! so the pointer math lives in exactly one place ([TDBIN-ENC-ORDER]). + +use crate::error::DecodeError; + +/// Bytes per word ([TDBIN-WIRE-WORD]). +pub(crate) const WORD_BYTES: usize = 8; + +/// Absolute word index of pointer `slot` in a struct whose data section +/// starts at `at`. `None` on overflow. +pub(crate) fn ptr_word(at: usize, data_words: u16, slot: usize) -> Option { + at.checked_add(usize::from(data_words))?.checked_add(slot) +} + +/// Resolve a relative pointer offset to an absolute word index. `None` on +/// overflow or a negative result ([TDBIN-SAFE-BOUNDS]). +pub(crate) fn target(ptr_word_index: usize, offset: i64) -> Option { + let base = i64::try_from(ptr_word_index.checked_add(1)?).ok()?; + usize::try_from(base.checked_add(offset)?).ok() +} + +/// Read the little-endian 64-bit word at `idx`, bounds-checked. +pub(crate) fn read_word(bytes: &[u8], idx: usize) -> Result { + let start = idx + .checked_mul(WORD_BYTES) + .ok_or(DecodeError::PointerOutOfBounds { word_index: idx })?; + let end = start + .checked_add(WORD_BYTES) + .ok_or(DecodeError::PointerOutOfBounds { word_index: idx })?; + let slice = bytes + .get(start..end) + .ok_or(DecodeError::PointerOutOfBounds { word_index: idx })?; + let arr = <[u8; WORD_BYTES]>::try_from(slice) + .map_err(|_| DecodeError::PointerOutOfBounds { word_index: idx })?; + Ok(u64::from_le_bytes(arr)) +} diff --git a/crates/tdbin/src/lib.rs b/crates/tdbin/src/lib.rs new file mode 100644 index 0000000..1adb16c --- /dev/null +++ b/crates/tdbin/src/lib.rs @@ -0,0 +1,86 @@ +//! TDBIN: a compact binary codec for typeDiagram algebraic data types +//! (records + tagged unions). This crate is the Rust runtime that +//! **typeDiagram-generated ADT code targets**: a typed value encodes +//! straight to bytes and decodes straight back, with no intermediate +//! dynamic representation — binary <-> typed object, both directions +//! ([TDBIN-RS-API]). +//! +//! The reflective schema model (`TypeDef`/`TypeRef`) is deliberately NOT +//! part of this path; it is an optional tooling feature layered on top. +//! Serialization needs only the fixed layout the generated `impl Struct` +//! bakes in. +//! +//! The wire format is specified in `docs/specs/tdbin-wire-format.md`; this +//! crate implements the v0 subset (bare framing, unpacked) proving the +//! round-trip. Every item references its `[TDBIN-*]` spec ID. + +mod error; +mod layout; +mod pointer; +mod reader; +mod writer; + +pub mod scalar; + +pub use error::{DecodeError, EncodeError}; +pub use reader::Reader; +pub use writer::Writer; + +/// Maximum struct-nesting depth accepted by the decoder ([TDBIN-SAFE-DEPTH]). +pub(crate) const MAX_DEPTH: u32 = 64; + +/// A type laid out on the wire as a struct: a fixed data section (scalars) +/// followed by a pointer section (strings, byte lists, nested structs, +/// unions). +/// +/// typeDiagram codegen emits one `impl Struct` per generated record and +/// union; the constants and methods here are exactly what it fills in +/// ([TDBIN-REC-ALLOC], [TDBIN-UNION-STRUCT]). The layout is fixed at +/// generation time — never recomputed at encode/decode. +pub trait Struct: Sized { + /// Number of 8-byte words in the data (scalar) section ([TDBIN-REC-ALLOC]). + const DATA_WORDS: u16; + /// Number of pointer slots in the pointer section ([TDBIN-REC-SECTIONS]). + const PTR_WORDS: u16; + + /// Total body words (data + pointer sections); `None` on overflow. + #[must_use] + fn body_words() -> Option { + usize::from(Self::DATA_WORDS).checked_add(usize::from(Self::PTR_WORDS)) + } + + /// Write this value into the struct body starting at word `at`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError>; + + /// Read a value from the struct body starting at word `at`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed or out-of-bounds input. + fn read_struct(r: &Reader<'_>, at: usize) -> Result; +} + +/// The user-facing codec entry points ([TDBIN-RS-API]): a typed value to +/// bytes and back, with no dynamic value model in between. Blanket-provided +/// for every [`Struct`]. +pub trait TdBin: Struct { + /// Encode to a fresh byte vector (v0: bare, unpacked framing). + /// + /// # Errors + /// Returns [`EncodeError`] if the value exceeds a wire-format limit. + fn to_bytes(&self) -> Result, EncodeError> { + Writer::message(self) + } + + /// Decode from bytes, safe on arbitrary untrusted input ([TDBIN-SAFE]). + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + fn from_bytes(wire: &[u8]) -> Result { + Reader::message(wire) + } +} + +impl TdBin for T {} diff --git a/crates/tdbin/src/pointer.rs b/crates/tdbin/src/pointer.rs new file mode 100644 index 0000000..5553be6 --- /dev/null +++ b/crates/tdbin/src/pointer.rs @@ -0,0 +1,137 @@ +//! Pointer words: the fixed 64-bit descriptors linking a struct to its +//! children ([TDBIN-PTR-STRUCT], [TDBIN-PTR-LIST], [TDBIN-PTR-NULL]). No +//! `as` casts and only constant-amount shifts, so nothing here can panic. + +use crate::error::{DecodeError, EncodeError}; + +/// Kind bits for a struct pointer. +const KIND_STRUCT: u64 = 0; +/// Kind bits for a list pointer. +const KIND_LIST: u64 = 1; +/// Two-bit mask selecting the pointer kind. +const KIND_MASK: u64 = 0b11; +/// List element-kind code for a byte list (String / Bytes bodies). +pub(crate) const ELEM_BYTE: u8 = 2; +/// Most negative offset expressible in the signed 30-bit field. +const OFFSET_MIN: i64 = -(1 << 29); +/// Most positive offset expressible in the signed 30-bit field. +const OFFSET_MAX: i64 = (1 << 29) - 1; +/// Mask for the 30-bit offset field. +const OFFSET_MASK: u64 = 0x3FFF_FFFF; +/// Sign bit within the 30-bit offset field. +const OFFSET_SIGN: u64 = 1 << 29; +/// Value subtracted to sign-extend a negative 30-bit offset. +const OFFSET_SPAN: i64 = 1 << 30; +/// Largest element count expressible in the 29-bit list count field. +const COUNT_MAX: u64 = 0x1FFF_FFFF; +/// Low-16-bit mask for a struct section size. +const SECTION_MASK: u64 = 0xFFFF; +/// Three-bit mask for a list element-kind code. +const ELEM_MASK: u64 = 0b111; + +/// A decoded pointer word. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub(crate) enum Pointer { + /// All-zero word: a default / absent value ([TDBIN-PTR-NULL]). + Null, + /// Struct pointer with a relative offset and section sizes. + Struct { + /// Signed word offset from the end of the pointer word to the target. + offset: i64, + /// Data-section word count of the target struct. + data_words: u16, + /// Pointer-section word count of the target struct. + ptr_words: u16, + }, + /// List pointer with a relative offset, element kind, and element count. + List { + /// Signed word offset from the end of the pointer word to the target. + offset: i64, + /// Element-kind code. + elem: u8, + /// Number of elements. + count: u32, + }, +} + +/// Encode the low 30 bits of a signed offset, validating range. +fn offset_bits(offset: i64) -> Result { + if (OFFSET_MIN..=OFFSET_MAX).contains(&offset) { + Ok(u64::from_le_bytes(offset.to_le_bytes()) & OFFSET_MASK) + } else { + Err(EncodeError::OffsetOutOfRange) + } +} + +/// Encode a struct pointer word ([TDBIN-PTR-STRUCT]). +pub(crate) fn encode_struct( + offset: i64, + data_words: u16, + ptr_words: u16, +) -> Result { + let bits = offset_bits(offset)?; + Ok(KIND_STRUCT | (bits << 2) | (u64::from(data_words) << 32) | (u64::from(ptr_words) << 48)) +} + +/// Encode a list pointer word ([TDBIN-PTR-LIST]). +pub(crate) fn encode_list(offset: i64, elem: u8, count: usize) -> Result { + let elems = u64::try_from(count).map_err(|_| EncodeError::LimitExceeded)?; + if elems > COUNT_MAX { + Err(EncodeError::LimitExceeded) + } else { + let bits = offset_bits(offset)?; + Ok(KIND_LIST | (bits << 2) | (u64::from(elem) << 32) | (elems << 35)) + } +} + +/// Sign-extend a 30-bit offset (already right-shifted into the low bits). +fn sign_extend(shifted: u64) -> Result { + let masked = shifted & OFFSET_MASK; + let base = i64::try_from(masked).map_err(|_| DecodeError::ReservedPointerKind)?; + match masked & OFFSET_SIGN { + 0 => Ok(base), + _ => base + .checked_sub(OFFSET_SPAN) + .ok_or(DecodeError::ReservedPointerKind), + } +} + +/// Extract a 16-bit section size from an already-shifted word. +fn section(shifted: u64) -> u16 { + // Masked to 16 bits, so the conversion never fails. + u16::try_from(shifted & SECTION_MASK).unwrap_or(0) +} + +/// Decode a pointer word into its structured form. +pub(crate) fn decode(word: u64) -> Result { + match word { + 0 => Ok(Pointer::Null), + _ => decode_nonnull(word), + } +} + +/// Decode a known-nonzero pointer word. +fn decode_nonnull(word: u64) -> Result { + let offset = sign_extend(word >> 2)?; + match word & KIND_MASK { + KIND_STRUCT => Ok(Pointer::Struct { + offset, + data_words: section(word >> 32), + ptr_words: section(word >> 48), + }), + KIND_LIST => Ok(decode_list(word, offset)), + _ => Err(DecodeError::ReservedPointerKind), + } +} + +/// Decode the element kind and count of a list pointer. +fn decode_list(word: u64, offset: i64) -> Pointer { + // Both fields are masked below their type widths, so conversion is exact. + let elem = u8::try_from((word >> 32) & ELEM_MASK).unwrap_or(0); + let count = u32::try_from((word >> 35) & COUNT_MAX).unwrap_or(0); + Pointer::List { + offset, + elem, + count, + } +} diff --git a/crates/tdbin/src/reader.rs b/crates/tdbin/src/reader.rs new file mode 100644 index 0000000..4d6c83f --- /dev/null +++ b/crates/tdbin/src/reader.rs @@ -0,0 +1,200 @@ +//! The single-pass decoder/verifier: bounds-checked reads with depth and +//! amplification budgets ([TDBIN-SAFE]). Generated ADT code calls the public +//! methods; decode materializes straight into the typed value, with no +//! intermediate dynamic representation. + +use core::cell::Cell; +use std::rc::Rc; + +use crate::error::DecodeError; +use crate::layout::{self, WORD_BYTES}; +use crate::pointer::{self, Pointer, ELEM_BYTE}; +use crate::{Struct, MAX_DEPTH}; + +/// A bounds-checked view over an encoded message ([TDBIN-SAFE-BOUNDS]). +#[derive(Debug)] +pub struct Reader<'a> { + /// The complete message bytes. + bytes: &'a [u8], + /// Remaining struct-nesting depth ([TDBIN-SAFE-DEPTH]). + depth: u32, + /// Shared remaining struct-follow budget ([TDBIN-SAFE-AMPLIFY]). + budget: Rc>, +} + +impl<'a> Reader<'a> { + /// Decode a root value from a complete message ([TDBIN-MSG-BARE]). + /// + /// # Errors + /// Returns [`DecodeError`] on malformed or out-of-bounds input. + pub(crate) fn message(bytes: &'a [u8]) -> Result { + let len = bytes.len(); + ((len != 0) && len.is_multiple_of(WORD_BYTES)) + .then_some(()) + .ok_or(DecodeError::BadLength)?; + let word_count = u64::try_from(len / WORD_BYTES).map_err(|_| DecodeError::BadLength)?; + let budget = Rc::new(Cell::new(word_count)); + let head = layout::read_word(bytes, 0)?; + match pointer::decode(head)? { + Pointer::Struct { offset, .. } => { + let at = layout::target(0, offset) + .ok_or(DecodeError::PointerOutOfBounds { word_index: 0 })?; + let reader = Self { + bytes, + depth: MAX_DEPTH, + budget, + }; + T::read_struct(&reader, at) + } + Pointer::Null => Err(DecodeError::NullRoot), + Pointer::List { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Read a scalar data word from `slot` of the struct at `at`. + /// + /// # Errors + /// Returns [`DecodeError`] if the word is out of bounds. + pub fn scalar(&self, at: usize, slot: u16) -> Result { + let idx = at + .checked_add(usize::from(slot)) + .ok_or(DecodeError::PointerOutOfBounds { word_index: at })?; + layout::read_word(self.bytes, idx) + } + + /// Read an optional UTF-8 string from pointer `slot` ([TDBIN-PRIM-MAP]). + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input or invalid UTF-8. + pub fn string( + &self, + at: usize, + data_words: u16, + slot: u16, + ) -> Result, DecodeError> { + match self.read_bytes(at, data_words, slot)? { + None => Ok(None), + Some(raw) => String::from_utf8(raw) + .map(Some) + .map_err(|_| DecodeError::InvalidUtf8), + } + } + + /// Read an optional raw byte list from pointer `slot` ([TDBIN-PRIM-MAP]). + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + pub fn bytes( + &self, + at: usize, + data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + self.read_bytes(at, data_words, slot) + } + + /// Read an optional child struct from pointer `slot` ([TDBIN-PTR-STRUCT]). + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input, depth, or amplification. + pub fn child( + &self, + at: usize, + data_words: u16, + slot: u16, + ) -> Result, DecodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { + Pointer::Null => Ok(None), + Pointer::Struct { offset, .. } => self.follow_struct::(ptr_word, offset).map(Some), + Pointer::List { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Read an optional raw byte list from pointer `slot`. + fn read_bytes( + &self, + at: usize, + data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { + Pointer::Null => Ok(None), + Pointer::List { + offset, + elem, + count, + } => self + .read_list_bytes(ptr_word, offset, elem, count) + .map(Some), + Pointer::Struct { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Follow a struct pointer, enforcing depth and amplification budgets. + fn follow_struct(&self, ptr_word: usize, offset: i64) -> Result { + let target = layout::target(ptr_word, offset).ok_or(DecodeError::PointerOutOfBounds { + word_index: ptr_word, + })?; + let depth = self + .depth + .checked_sub(1) + .ok_or(DecodeError::DepthExceeded)?; + let left = self + .budget + .get() + .checked_sub(1) + .ok_or(DecodeError::AmplificationExceeded)?; + self.budget.set(left); + let child = Self { + bytes: self.bytes, + depth, + budget: Rc::clone(&self.budget), + }; + C::read_struct(&child, target) + } + + /// Read `count` bytes referenced by a byte-list pointer. + fn read_list_bytes( + &self, + ptr_word: usize, + offset: i64, + elem: u8, + count: u32, + ) -> Result, DecodeError> { + if elem == ELEM_BYTE { + let start_word = + layout::target(ptr_word, offset).ok_or(DecodeError::PointerOutOfBounds { + word_index: ptr_word, + })?; + let start = + start_word + .checked_mul(WORD_BYTES) + .ok_or(DecodeError::PointerOutOfBounds { + word_index: start_word, + })?; + let len = usize::try_from(count).map_err(|_| DecodeError::LimitExceeded)?; + let end = start + .checked_add(len) + .ok_or(DecodeError::PointerOutOfBounds { + word_index: start_word, + })?; + let slice = self + .bytes + .get(start..end) + .ok_or(DecodeError::PointerOutOfBounds { + word_index: start_word, + })?; + Ok(slice.to_vec()) + } else { + Err(DecodeError::PointerKindMismatch) + } + } + + /// Absolute word index of pointer `slot`. + fn ptr_index(at: usize, data_words: u16, slot: u16) -> Result { + layout::ptr_word(at, data_words, usize::from(slot)) + .ok_or(DecodeError::PointerOutOfBounds { word_index: at }) + } +} diff --git a/crates/tdbin/src/scalar.rs b/crates/tdbin/src/scalar.rs new file mode 100644 index 0000000..f5405dc --- /dev/null +++ b/crates/tdbin/src/scalar.rs @@ -0,0 +1,39 @@ +//! Scalar <-> word bit conversions for data-section fields ([TDBIN-PRIM-MAP]). +//! Pure reinterpretation — no arithmetic, no `as` casts. Generated ADT code +//! calls these to fill and read scalar slots. + +/// Encode a `bool` as a data word (low bit). +#[must_use] +pub fn bool_bits(value: bool) -> u64 { + u64::from(value) +} + +/// Decode a `bool` from a data word. +#[must_use] +pub fn bool_from(word: u64) -> bool { + (word & 1) == 1 +} + +/// Encode an `i64` as its little-endian bit pattern. +#[must_use] +pub fn i64_bits(value: i64) -> u64 { + u64::from_le_bytes(value.to_le_bytes()) +} + +/// Decode an `i64` from its little-endian bit pattern. +#[must_use] +pub fn i64_from(word: u64) -> i64 { + i64::from_le_bytes(word.to_le_bytes()) +} + +/// Encode an `f64` as its IEEE-754 bit pattern. +#[must_use] +pub fn f64_bits(value: f64) -> u64 { + value.to_bits() +} + +/// Decode an `f64` from its IEEE-754 bit pattern. +#[must_use] +pub fn f64_from(word: u64) -> f64 { + f64::from_bits(word) +} diff --git a/crates/tdbin/src/writer.rs b/crates/tdbin/src/writer.rs new file mode 100644 index 0000000..fb37cb7 --- /dev/null +++ b/crates/tdbin/src/writer.rs @@ -0,0 +1,189 @@ +//! The word-arena encoder: preorder allocation with in-message back-patching +//! ([TDBIN-ENC-ORDER]). Generated ADT code calls the public methods; the +//! private helpers keep the pointer math in one place. + +use crate::error::EncodeError; +use crate::layout::{self, WORD_BYTES}; +use crate::pointer::{self, ELEM_BYTE}; +use crate::Struct; + +/// Upper bound on message body words (a safety cap for the encoder). +const MAX_WORDS: usize = 1 << 26; +/// Bytes packed per word when laying out a byte list. +const BYTES_PER_WORD: usize = WORD_BYTES; + +/// Accumulates message body words while encoding a value tree. +#[derive(Debug)] +pub struct Writer { + /// The message body, one entry per 8-byte word. + body: Vec, +} + +impl Writer { + /// Create an empty writer. + fn new() -> Self { + Self { body: Vec::new() } + } + + /// Encode a root value into a complete message ([TDBIN-MSG-BARE]). + /// + /// # Errors + /// Returns [`EncodeError`] if the value exceeds a wire-format limit. + pub(crate) fn message(value: &T) -> Result, EncodeError> { + let mut writer = Self::new(); + let _root = writer.reserve(1)?; + let words = T::body_words().ok_or(EncodeError::LimitExceeded)?; + let root_at = writer.reserve(words)?; + value.write_struct(&mut writer, root_at)?; + let offset = rel_offset(root_at, 0)?; + let ptr = pointer::encode_struct(offset, T::DATA_WORDS, T::PTR_WORDS)?; + writer.set(0, ptr)?; + Ok(writer.into_bytes()) + } + + /// Reserve `words` zeroed words, returning the start index. + fn reserve(&mut self, words: usize) -> Result { + let start = self.body.len(); + let end = start.checked_add(words).ok_or(EncodeError::LimitExceeded)?; + if end > MAX_WORDS { + Err(EncodeError::LimitExceeded) + } else { + self.body.resize(end, 0); + Ok(start) + } + } + + /// Overwrite the word at absolute index `idx`. + fn set(&mut self, idx: usize, value: u64) -> Result<(), EncodeError> { + let cell = self.body.get_mut(idx).ok_or(EncodeError::LimitExceeded)?; + *cell = value; + Ok(()) + } + + /// Write a scalar into data `slot` of the struct at `at` ([TDBIN-REC-ALLOC]). + /// + /// # Errors + /// Returns [`EncodeError`] if the slot index overflows. + pub fn scalar(&mut self, at: usize, slot: u16, bits: u64) -> Result<(), EncodeError> { + let idx = at + .checked_add(usize::from(slot)) + .ok_or(EncodeError::LimitExceeded)?; + self.set(idx, bits) + } + + /// Write an optional UTF-8 string into pointer `slot` ([TDBIN-PRIM-MAP]). + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn string( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&str>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(text) => self.write_byte_list(ptr_word, text.as_bytes()), + } + } + + /// Write optional raw bytes into pointer `slot` ([TDBIN-PRIM-MAP]). + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn bytes( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[u8]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(raw) => self.write_byte_list(ptr_word, raw), + } + } + + /// Write an optional child struct into pointer `slot` ([TDBIN-PTR-STRUCT]). + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn child( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&C>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(child) => self.write_child(ptr_word, child), + } + } + + /// Absolute word index of pointer `slot`. + fn ptr_index(at: usize, data_words: u16, slot: u16) -> Result { + layout::ptr_word(at, data_words, usize::from(slot)).ok_or(EncodeError::LimitExceeded) + } + + /// Append a child struct body and patch its pointer word. + fn write_child(&mut self, ptr_word: usize, child: &C) -> Result<(), EncodeError> { + let words = C::body_words().ok_or(EncodeError::LimitExceeded)?; + let child_at = self.reserve(words)?; + child.write_struct(self, child_at)?; + let offset = rel_offset(child_at, ptr_word)?; + let ptr = pointer::encode_struct(offset, C::DATA_WORDS, C::PTR_WORDS)?; + self.set(ptr_word, ptr) + } + + /// Append a byte-list body and patch its list pointer word. + fn write_byte_list(&mut self, ptr_word: usize, data: &[u8]) -> Result<(), EncodeError> { + let words = data + .len() + .checked_add(BYTES_PER_WORD - 1) + .ok_or(EncodeError::LimitExceeded)? + >> 3; + let start = self.reserve(words)?; + self.pack_bytes(start, data)?; + let offset = rel_offset(start, ptr_word)?; + let ptr = pointer::encode_list(offset, ELEM_BYTE, data.len())?; + self.set(ptr_word, ptr) + } + + /// Pack raw bytes little-endian into words beginning at `start`. + fn pack_bytes(&mut self, start: usize, data: &[u8]) -> Result<(), EncodeError> { + for (i, chunk) in data.chunks(BYTES_PER_WORD).enumerate() { + let mut buf = [0u8; BYTES_PER_WORD]; + let dst = buf + .get_mut(..chunk.len()) + .ok_or(EncodeError::LimitExceeded)?; + dst.copy_from_slice(chunk); + let idx = start.checked_add(i).ok_or(EncodeError::LimitExceeded)?; + self.set(idx, u64::from_le_bytes(buf))?; + } + Ok(()) + } + + /// Flatten the body to a little-endian byte vector ([TDBIN-ENC-CANON]). + fn into_bytes(self) -> Vec { + let mut out = Vec::new(); + for word in self.body { + out.extend_from_slice(&word.to_le_bytes()); + } + out + } +} + +/// Relative offset (in words) from the end of a pointer word to a target. +fn rel_offset(target_word: usize, ptr_word: usize) -> Result { + let target = i64::try_from(target_word).map_err(|_| EncodeError::LimitExceeded)?; + let base = i64::try_from(ptr_word) + .map_err(|_| EncodeError::LimitExceeded)? + .checked_add(1) + .ok_or(EncodeError::LimitExceeded)?; + target.checked_sub(base).ok_or(EncodeError::LimitExceeded) +} diff --git a/crates/tdbin/tests/roundtrip.rs b/crates/tdbin/tests/roundtrip.rs new file mode 100644 index 0000000..84ad4d6 --- /dev/null +++ b/crates/tdbin/tests/roundtrip.rs @@ -0,0 +1,311 @@ +//! [TDBIN-TEST-ROUNDTRIP] Bidirectional round-trip tests over the public API: +//! typed object -> binary -> typed object, AND binary -> object -> binary +//! (byte-identical). The example types below are shaped exactly like the +//! `impl Struct` blocks typeDiagram codegen emits from a Model. + +use tdbin::scalar::{bool_bits, bool_from, f64_bits, f64_from, i64_bits, i64_from}; +use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; + +/// A boxed error alias so tests can use `?` without `unwrap`. +type TestResult = Result<(), Box>; + +// ── Example ADTs (as codegen would emit) ── + +/// A nested record reached through a pointer slot. +#[derive(Debug, Clone, PartialEq, Eq)] +struct Address { + /// Street line (pointer slot 0). + street: String, + /// Postal code (data slot 0). + zip: i64, +} + +impl Struct for Address { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, i64_bits(self.zip))?; + w.string(at, Self::DATA_WORDS, 0, Some(&self.street)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let zip = i64_from(r.scalar(at, 0)?); + let street = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + Ok(Self { street, zip }) + } +} + +/// The email variant payload of `Contact`. +#[derive(Debug, Clone, PartialEq, Eq)] +struct EmailContact { + /// Email address (pointer slot 0). + addr: String, +} + +impl Struct for EmailContact { + const DATA_WORDS: u16 = 0; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.addr)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let addr = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + Ok(Self { addr }) + } +} + +/// The phone variant payload of `Contact`. +#[derive(Debug, Clone, PartialEq, Eq)] +struct PhoneContact { + /// Subscriber number (data slot 0). + number: i64, + /// Country calling code (data slot 1). + country: i64, +} + +impl Struct for PhoneContact { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, i64_bits(self.number))?; + w.scalar(at, 1, i64_bits(self.country)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let number = i64_from(r.scalar(at, 0)?); + let country = i64_from(r.scalar(at, 1)?); + Ok(Self { number, country }) + } +} + +/// A tagged union: discriminant in data slot 0, payload in pointer slot 0. +#[derive(Debug, Clone, PartialEq, Eq)] +enum Contact { + /// Reachable by email. + Email(EmailContact), + /// Reachable by phone. + Phone(PhoneContact), +} + +impl Struct for Contact { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + match self { + Self::Email(payload) => { + w.scalar(at, 0, 0)?; + w.child(at, Self::DATA_WORDS, 0, Some(payload)) + } + Self::Phone(payload) => { + w.scalar(at, 0, 1)?; + w.child(at, Self::DATA_WORDS, 0, Some(payload)) + } + } + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::Email( + r.child(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + 1 => Ok(Self::Phone( + r.child(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + ordinal => Err(DecodeError::UnknownVariant { ordinal }), + } + } +} + +/// The root record: every scalar kind, an optional nested record, an +/// optional string, and a union. +#[derive(Debug, Clone, PartialEq)] +struct Person { + /// Full name (pointer slot 0). + name: String, + /// Age in years (data slot 0). + age: i64, + /// Whether the account is active (data slot 1). + active: bool, + /// A floating-point score (data slot 2). + score: f64, + /// Optional mailing address (pointer slot 1). + address: Option
, + /// Optional nickname (pointer slot 2). + nickname: Option, + /// Preferred contact channel (pointer slot 3). + contact: Contact, +} + +impl Struct for Person { + const DATA_WORDS: u16 = 3; + const PTR_WORDS: u16 = 4; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, i64_bits(self.age))?; + w.scalar(at, 1, bool_bits(self.active))?; + w.scalar(at, 2, f64_bits(self.score))?; + w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; + w.child(at, Self::DATA_WORDS, 1, self.address.as_ref())?; + w.string(at, Self::DATA_WORDS, 2, self.nickname.as_deref())?; + w.child(at, Self::DATA_WORDS, 3, Some(&self.contact)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let age = i64_from(r.scalar(at, 0)?); + let active = bool_from(r.scalar(at, 1)?); + let score = f64_from(r.scalar(at, 2)?); + let name = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + let address = r.child::
(at, Self::DATA_WORDS, 1)?; + let nickname = r.string(at, Self::DATA_WORDS, 2)?; + let contact = r + .child::(at, Self::DATA_WORDS, 3)? + .ok_or(DecodeError::UnexpectedNull)?; + Ok(Self { + name, + age, + active, + score, + address, + nickname, + contact, + }) + } +} + +// ── Fixtures ── + +/// A person exercising Some(address), Some(nickname), and the Email variant. +fn person_with_address() -> Person { + Person { + name: "Ada Lovelace".to_owned(), + age: 36, + active: true, + score: 9.75, + address: Some(Address { + street: "1 Analytical Way".to_owned(), + zip: 1815, + }), + nickname: Some("Countess".to_owned()), + contact: Contact::Email(EmailContact { + addr: "ada@example.com".to_owned(), + }), + } +} + +/// A person exercising None fields, a negative float, and the Phone variant. +fn person_without_address() -> Person { + Person { + name: "Alan Turing".to_owned(), + age: 41, + active: false, + score: -1.5, + address: None, + nickname: None, + contact: Contact::Phone(PhoneContact { + number: 1912, + country: 44, + }), + } +} + +// ── Tests ── + +/// typed object -> binary -> typed object is the identity, for both fixtures. +#[test] +fn object_to_binary_to_object_is_identity() -> TestResult { + for person in [person_with_address(), person_without_address()] { + let bytes = person.to_bytes()?; + assert!( + bytes.len().is_multiple_of(8), + "message must be word-aligned" + ); + assert!(bytes.len() >= 16, "non-empty root cannot fit in one word"); + let decoded = Person::from_bytes(&bytes)?; + assert_eq!( + decoded, person, + "object -> binary -> object must round-trip exactly" + ); + } + Ok(()) +} + +/// binary -> typed object -> binary is byte-identical (canonical encoding). +#[test] +fn binary_to_object_to_binary_is_byte_identical() -> TestResult { + for person in [person_with_address(), person_without_address()] { + let bytes = person.to_bytes()?; + let decoded = Person::from_bytes(&bytes)?; + let reencoded = decoded.to_bytes()?; + assert_eq!( + reencoded, bytes, + "binary -> object -> binary must reproduce the bytes" + ); + } + Ok(()) +} + +/// Encoding the same value twice yields identical bytes ([TDBIN-ENC-CANON]). +#[test] +fn encoding_is_deterministic() -> TestResult { + let person = person_with_address(); + assert_eq!( + person.to_bytes()?, + person.to_bytes()?, + "encoding must be deterministic" + ); + Ok(()) +} + +/// The two fixtures encode to distinct byte strings (no accidental collision). +#[test] +fn distinct_values_encode_distinctly() -> TestResult { + assert_ne!( + person_with_address().to_bytes()?, + person_without_address().to_bytes()?, + "different values must not collide on the wire" + ); + Ok(()) +} + +/// [TDBIN-TEST-EVIL] Adversarial inputs return typed errors, never panic. +#[test] +fn adversarial_inputs_return_typed_errors() -> TestResult { + assert_eq!(Person::from_bytes(&[]), Err(DecodeError::BadLength)); + assert_eq!(Person::from_bytes(&[0, 0, 0]), Err(DecodeError::BadLength)); + assert_eq!( + Person::from_bytes(&[0, 0, 0, 0, 0, 0, 0, 0]), + Err(DecodeError::NullRoot) + ); + assert_eq!( + Person::from_bytes(&[0xFF; 8]), + Err(DecodeError::ReservedPointerKind) + ); + // A list-pointer root where a struct is required. + assert_eq!( + Person::from_bytes(&[0x01, 0, 0, 0, 0, 0, 0, 0]), + Err(DecodeError::PointerKindMismatch) + ); + + // Truncating a valid message mid-body yields a bounds error, never a panic. + let full = person_with_address().to_bytes()?; + let truncated = full + .get(..full.len().saturating_sub(8)) + .ok_or("fixture too short")?; + match Person::from_bytes(truncated) { + Err(DecodeError::PointerOutOfBounds { .. } | DecodeError::InvalidUtf8) => Ok(()), + other => Err(format!("expected a bounds error on truncation, got {other:?}").into()), + } +} From 1f8985fc4c6b3d3417cd2297b2f566a115ca5bd1 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 21:45:09 +1000 Subject: [PATCH 10/16] fixes --- docs/plans/tdbin-implementation-plan.md | 116 ++++---- .../typediagram/src/converters/rust-tdbin.ts | 250 ++++++++++++++++++ packages/typediagram/src/converters/rust.ts | 62 ++--- 3 files changed, 347 insertions(+), 81 deletions(-) create mode 100644 packages/typediagram/src/converters/rust-tdbin.ts diff --git a/docs/plans/tdbin-implementation-plan.md b/docs/plans/tdbin-implementation-plan.md index d474788..56db524 100644 --- a/docs/plans/tdbin-implementation-plan.md +++ b/docs/plans/tdbin-implementation-plan.md @@ -3,72 +3,94 @@ > Executes [docs/specs/tdbin-wire-format.md](../specs/tdbin-wire-format.md) + [docs/specs/tdbin-rust-api.md](../specs/tdbin-rust-api.md). > Research basis: [docs/research/binary-format-research.md](../research/binary-format-research.md). > First language: **Rust** (`crates/tdbin`, the workspace's first crate). TypeScript follows via golden-vector conformance. -> End state (roadmap): two-way streaming + an RPC framework (`[TDRPC-*]`) where typeDiagram `type`s are the payloads and typeDiagram **functions are the service contract** — every phase below keeps that door open (self-delimiting frames, forward-only encode, reserved capability pointer kind). +> End state (roadmap): two-way streaming + an RPC framework (`[TDRPC-*]`) where typeDiagram `type`s are the payloads and typeDiagram **functions are the service contract** — every phase keeps that door open (self-delimiting frames, forward-only encode, reserved capability pointer kind). -Rules of engagement: every function/test references its `[TDBIN-*]` ID; deslop `find-similar` before authoring, `rescan` after; functions < 20 lines, files < 500 lines; no panics; `Result` everywhere; `tracing` only. +Rules of engagement: every function/test references its `[TDBIN-*]` ID; deslop `find-similar` before authoring, `rescan` after; functions < 20 lines, files < 500 lines; no panics; `Result` everywhere. --- -## Phase 1 — Crate scaffold + schema model + layout engine +## ARCHITECTURE (non-negotiable, corrected) -- [ ] `crates/tdbin/Cargo.toml`: `[lints] workspace = true`, deps `thiserror` + `tracing`, workspace-inherited edition/license `[TDBIN-RS-CRATE]` -- [ ] Wire `cargo fmt` / `cargo clippy -- -D warnings` / `cargo llvm-cov` into `make fmt` / `make lint` / `make test` (first crate has landed — root `Cargo.toml` note + REPO-STANDARDS-SPEC `[MAKE-TARGETS]`); add Rust entry to `coverage-thresholds.json` (ratchet-only) -- [ ] Schema model: `TypeDef` / `FieldDef` / `VariantDef` / `TypeRef` `[TDBIN-RS-SCHEMA]` -- [ ] `build_schema`: validation (duplicates, unknown refs, arity, `InfiniteInline`, caps `[TDBIN-WIRE-LIMITS]`), alias expansion `[TDBIN-SCHEMA-ALIAS]`, monomorphization `[TDBIN-SCHEMA-MONO]` -- [ ] Layout engine: first-fit bit allocator `[TDBIN-REC-ALLOC]`, union variant overlap `[TDBIN-UNION-OVERLAP]`, discriminant sizing `[TDBIN-UNION-DISC]`, enum-union inlining `[TDBIN-UNION-ENUM]`, `Option` special cases `[TDBIN-PRIM-OPTION]` -- [ ] Canonical schema text + FNV-1a hash `[TDBIN-SCHEMA-CANON]` `[TDBIN-SCHEMA-HASH]` -- [ ] Test (merged, assertion-dense): layout goldens for a complex schema — exact bit offsets, pointer slots, section sizes, discriminant widths, hash values; plus every `SchemaError` variant provoked `[TDBIN-RS-ERROR]` +**typeDiagram ADT ⇄ binary, direct — no intermediate dynamic model.** -## Phase 2 — Encoder +``` +typeDiagram .td ──parse──▶ Model ──┬─ rust.ts toSource(model) ─▶ Rust ADT types (EXISTING codegen) + └─ rust-tdbin.ts emitCodec() ─▶ impl tdbin::Struct (NEW codegen) + │ + your Rust object ──.to_bytes()──▶ binary ──Object::from_bytes()──▶ your Rust object +``` -- [ ] Word arena writer: preorder DFS allocation, in-message back-patching only `[TDBIN-ENC-ORDER]` -- [ ] Struct emission: XOR-default scalars `[TDBIN-REC-XOR]`, bit packing `[TDBIN-WIRE-WORD]`, zeroed padding + dead union slots `[TDBIN-ENC-ZERO]` -- [ ] Pointer emission: struct/list pointers, null-for-default `[TDBIN-PTR-STRUCT]` `[TDBIN-PTR-LIST]` `[TDBIN-PTR-NULL]` -- [ ] All list forms incl. composite tag word `[TDBIN-LIST-ELEM]` `[TDBIN-LIST-RAW]` `[TDBIN-LIST-COMPOSITE]` -- [ ] Primitive codecs: `DateTime`/`Uuid`/`Decimal` byte layouts `[TDBIN-PRIM-MAP]`, `Option` matrix `[TDBIN-PRIM-OPTION]` -- [ ] Framing writer `[TDBIN-MSG-FRAME]`; determinism `[TDBIN-ENC-CANON]` -- [ ] Test: encode-side of `[TDBIN-TEST-ROUNDTRIP]` + first golden vectors `[TDBIN-TEST-GOLDEN]` (byte-exact hex) +1. **The ADTs are GENERATED by typeDiagram codegen — never hand-written.** typeDiagram already ships language converters (`packages/typediagram/src/converters/*.ts`); the Rust one emits the `struct`/`enum` types. We **extend that codegen** to also emit the TDBIN codec (`impl tdbin::Struct`). This is mandatory. +2. **No runtime `Schema`, no dynamic `Value` on the hot path.** Layout (data/pointer sections, slots, discriminant) is baked into the generated `impl` at generation time. Decode materializes straight into the typed object. This is what makes it faster than a reflective codec. +3. **`TypeDef`/`TypeRef` (reflective schema model) is an OPTIONAL EXTRA**, for tooling that wants to inspect model structure — explicitly NOT part of serialize/deserialize. Recorded in [tdbin-rust-api.md](../specs/tdbin-rust-api.md) `[TDBIN-RS-REFLECT]`. -## Phase 3 — Verifier + decoder - -- [ ] O(n) verify pass: bounds `[TDBIN-SAFE-BOUNDS]`, depth `[TDBIN-SAFE-DEPTH]`, amplification budget `[TDBIN-SAFE-AMPLIFY]`, UTF-8 `[TDBIN-SAFE-UTF8]`, all-slots validation `[TDBIN-SAFE-ZEROSLOT]`, `VerifyStats` -- [ ] Decode = verify + materialize in one pass → `Value` `[TDBIN-RS-VALUE]`; short/long structs `[TDBIN-REC-SHORT]`; `UnknownVariant` `[TDBIN-UNION-UNKNOWN]` -- [ ] Framing reader: magic/version/reserved/length/hash checks `[TDBIN-MSG-FRAME]` -- [ ] Full `DecodeError` surface `[TDBIN-RS-ERROR]`; totality `[TDBIN-RS-NOPANIC]`; `tracing` spans `[TDBIN-RS-LOG]` -- [ ] Tests: full `[TDBIN-TEST-ROUNDTRIP]` both directions; adversarial corpus `[TDBIN-TEST-EVIL]`; evolution suite `[TDBIN-TEST-EVOLVE]` - -## Phase 4 — Packing + fuzz +--- -- [ ] Packer/unpacker `[TDBIN-PACK-WORD]` `[TDBIN-PACK-RUNS]`, bounds-checked, output-capped -- [ ] Packed framing end-to-end (`PACKED` flag) `[TDBIN-MSG-FRAME]` -- [ ] Extend `[TDBIN-TEST-ROUNDTRIP]`/`[TDBIN-TEST-GOLDEN]`/`[TDBIN-TEST-EVIL]` with packed variants (incl. `PackedTruncated`) +## Phase 0 — v0 runtime + direct bidirectional round-trip ✅ DONE + +- [x] `crates/tdbin/Cargo.toml`: `[lints] workspace = true`, **zero external deps** (offline-safe; `thiserror`/`tracing` deferred to the logging pass) `[TDBIN-RS-CRATE]` +- [x] Wire primitives: 8-byte LE words `[TDBIN-WIRE-WORD]`, struct/list/null pointers `[TDBIN-PTR-STRUCT]` `[TDBIN-PTR-LIST]` `[TDBIN-PTR-NULL]`, reserved-kind rejection `[TDBIN-PTR-RESERVED]` +- [x] Encoder `Writer`: preorder allocation + in-message back-patching, scalar/string/bytes/child slots, byte-list packing `[TDBIN-ENC-ORDER]` `[TDBIN-REC-ALLOC]` +- [x] Decoder `Reader`: single-pass, bounds-checked, **depth cap 64** `[TDBIN-SAFE-DEPTH]`, **amplification budget** `[TDBIN-SAFE-AMPLIFY]`, UTF-8 validation `[TDBIN-SAFE-UTF8]` +- [x] Direct typed API: `Struct` + `TdBin` traits (`to_bytes`/`from_bytes`), scalar codecs — **no dynamic `Value`** `[TDBIN-RS-API]` +- [x] Errors as values, total functions, no panics on any input `[TDBIN-RS-NOPANIC]` `[TDBIN-RS-ERROR]` +- [x] **Bidirectional tests GREEN** `[TDBIN-TEST-ROUNDTRIP]`: object→binary→object identity; binary→object→binary byte-identical; deterministic; distinct-values-distinct; adversarial inputs → typed errors never panic `[TDBIN-TEST-EVIL]` +- [x] `make`-relevant gates: `cargo build` ✓, `cargo clippy --all-targets` under **deny-all = 0 errors** ✓, `cargo fmt --check` clean ✓, `cargo test` = **5/5 pass** ✓ + +v0 wire subset (documented in-crate): one word per scalar (bool/int/float), String/Bytes/nested-record/union via pointers, `Option` = null-for-None, union = discriminant word + payload child pointer. Bit/word packing, semantic scalars, and lists are Phase 2+. + +## Phase 1 — Codegen: typeDiagram Model → Rust ADT + TDBIN codec ⬅ IN PROGRESS + +- [x] Refactor `converters/rust.ts` to export a per-decl emitter (`emitRustDecl`, `mapTdToRs`) — reuse, zero duplication (deslop); existing `rust.test.ts` still green (7/7) +- [x] `converters/rust-tdbin.ts`: `emitRustCodec(model): Result` → `impl tdbin::Struct` per record/union, layout computed from the Model at generation time `[TDBIN-REC-ALLOC]` `[TDBIN-UNION-DISC]`; unsupported shapes fail loudly (no placeholders) +- [x] Field classification: scalar (Bool/Int/Float → data section) vs pointer (String/Bytes/`Option`/declared record|union → pointer section); union ordinal = declaration index (pinned discriminants codegen-only, never on wire) `[TDBIN-UNION-DISC]` +- [ ] vitest: assert emitted codec for a Person-shaped `.td` (exact `DATA_WORDS`/`PTR_WORDS`, slot indices, match arms) — guards codegen in CI +- [ ] **End-to-end proof**: generate types (`rust.toSource`) + codec (`emitRustCodec`) from a `.td`, compile the GENERATED Rust against the `tdbin` rlib, round-trip it — **typeDiagram ADT → binary → typeDiagram ADT** on generated code +- [ ] Follow-up: make generated code deny-all-clean (doc comments, derives) so the generated round-trip lives in-crate under `make test` + +## Phase 2 — Wire completeness (size + fidelity) + +- [ ] Bit/word packing: bools 1 bit, first-fit bit allocator, XOR-with-default scalars `[TDBIN-REC-XOR]` `[TDBIN-WIRE-WORD]`; zeroed padding + dead union slots `[TDBIN-ENC-ZERO]` +- [ ] All list forms incl. composite tag word `[TDBIN-LIST-ELEM]` `[TDBIN-LIST-RAW]` `[TDBIN-LIST-COMPOSITE]`; **List width ≥ 1 byte, reject ordinals ≥ 256 in 1-byte lists** (review finding `wide-enum-list`) +- [ ] Semantic scalars: `DateTime`/`Uuid`/`Decimal` byte layouts `[TDBIN-PRIM-MAP]`; full `Option` matrix incl. `Option` presence bit `[TDBIN-PRIM-OPTION]` +- [ ] `Option` must NOT alias the null pointer (review finding `empty-struct-null-collision`) — reserve a non-zero marker or forbid zero-size struct pointers +- [ ] Cap'n-Proto word packing `[TDBIN-PACK-WORD]` `[TDBIN-PACK-RUNS]`, bounds-checked, output-capped +- [ ] Framing `[TDBIN-MSG-FRAME]`: magic/version/flags/body_len; **decode must know framing/packed from the bytes** (review finding `decode-framing-packed-ambiguity`) — self-describing header, not a decode option +- [ ] Golden vectors `[TDBIN-TEST-GOLDEN]` byte-exact hex; extend round-trip/evil corpora with packed + framed variants + +## Phase 3 — Evolution + safety hardening (resolve review BLOCKERS) + +- [ ] **Enum-union class flip** (`enum-union-class-flip`): adding the first payload variant to an all-bare union is BREAKING — pin encoding class; update `[TDBIN-EVOLVE-BREAKING]` +- [ ] **Schema-hash vs append-compat** (`hash-contradicts-compat`): split identity into a layout hash (positions/widths, names excluded) for framed rejection + an exact-text hash for tooling, OR a schema major-version field; fix `[TDBIN-SCHEMA-CANON]` `[TDBIN-MSG-STREAM]` +- [ ] Verifier slot-typing rule made explicit for overlapped union slots + unknown variants `[TDBIN-SAFE-ZEROSLOT]` `[TDBIN-UNION-UNKNOWN]` +- [ ] `Map` and `Any`: give a wire encoding or reject explicitly with a typed error (review finding `map-any`) +- [ ] Evolution suite `[TDBIN-TEST-EVOLVE]`: append-field/variant compatibility, short/long structs `[TDBIN-REC-SHORT]`, width-crossing breaking case `[TDBIN-EVOLVE-WIDTH]` - [ ] `cargo-fuzz` decode target, CI time-budgeted `[TDBIN-TEST-FUZZ]` -## Phase 5 — The gate: benchmark vs Protobuf +## Phase 4 — The gate: benchmark vs Protobuf (make "smaller AND faster" enforceable) -- [ ] Benchmark corpus in typeDiagram + `.proto`: diagram-model doc, union-heavy events, list-heavy dataset `[TDBIN-BENCH-CORPUS]` -- [ ] Criterion benches vs `prost`; CI-enforced gate: **size ≤ protobuf on every entry, encode+decode ≥ 1.5× prost throughput** `[TDBIN-BENCH-GATE]` -- [ ] Size assertions also live inside `[TDBIN-TEST-ROUNDTRIP]` (packed TDBIN bytes vs recorded protobuf fixture sizes) so `make test` guards the size axis even without benches -- [ ] Record baseline numbers in the bench report; regressions fail +- [ ] Corpus in typeDiagram + `.proto`: record-heavy doc, union-heavy events, list-heavy dataset `[TDBIN-BENCH-CORPUS]` (protobuf side via existing `converters/protobuf.ts`) +- [ ] Criterion benches vs `prost`; gate with a noise margin (review findings `speed-gate-nondeterministic`, `size-gate-small-messages`): size ≤ protobuf on realistic entries; encode/decode throughput target — **statistical, not a bare wall-clock fail** `[TDBIN-BENCH-GATE]` +- [ ] Size assertions inside `[TDBIN-TEST-ROUNDTRIP]` (packed TDBIN vs recorded protobuf fixture sizes) so `make test` guards size deterministically -## Phase 6 — `.td` text pipeline (E2E per repo testing rules) +## Phase 5 — Full `.td` pipeline + tooling -- [ ] `crates/td-schema`: parser for the type subset of the language reference (records, unions incl. pinned/tuple variants, aliases, generics) → `TypeDef` — mirrors the TS parser's grammar; golden-parity fixtures against `packages/typediagram` parser output -- [ ] E2E tests: **diagram text → schema → encode → decode** in one black-box flow (the repo's "complex diagram text" test shape) -- [ ] CLI glue (later, `packages/cli` or a `tdbin` bin): `typediagram encode|decode|verify` — thin consumer only +- [ ] CLI glue (`packages/cli` or a `tdbin` bin): `typediagram encode|decode|verify` — thin consumer of the generated codec +- [ ] `[TDBIN-RS-REFLECT]` optional reflective `TypeDef`/`TypeRef` model + dynamic `Value` codec — for tooling only, clearly off the typed hot path -## Phase 7 — Roadmap tracks (each opens with its own spec) +## Phase 6 — Roadmap tracks (each opens with its own spec) -- [ ] `[TDBIN-FUTURE-READER]` zero-copy reader: `verify` once → nanosecond typed accessors (the order-of-magnitude read win, research §2) +- [ ] `[TDBIN-FUTURE-READER]` zero-copy reader: `verify` once → nanosecond typed accessors (research §2) - [ ] `[TDBIN-FUTURE-COLUMNAR]` struct-of-arrays lists: validity bitmaps, dense-union columns, SIMD-BP128 integer columns - [ ] `[TDBIN-FUTURE-TS]` TypeScript codec in `packages/typediagram/` passing every golden vector -- [ ] `[TDBIN-FUTURE-RPC]` **`[TDRPC-*]` spec — the streaming/RPC framework**: typeDiagram function definitions → service contract; unary/server-stream/client-stream/bidi from signature shape (`f(Stream) -> Stream`); numeric method ids (no method-name strings on the wire); capability pointer kind `11`; promise pipelining; QUIC-first transport. Drafted from the dedicated RPC research pass (research §6) +- [ ] `[TDBIN-FUTURE-RPC]` **`[TDRPC-*]` spec — streaming/RPC framework**: typeDiagram function definitions → service contract; unary/server-stream/client-stream/bidi from signature shape; numeric method ids; capability pointer kind `11`; promise pipelining; QUIC-first transport (RPC research pass, research §6) - [ ] `[TDBIN-FUTURE-WIDTH-TYPES]` width-refined DSL numerics; `[TDBIN-FUTURE-ORDINALS]` explicit ordinals for non-append evolution -## Exit criteria (v1 = phases 1–5) +## Exit criteria (v1 = phases 0–4) 1. `make ci` green: fmt + clippy (deny-all) + tests + coverage threshold + deslop budget. -2. Golden vectors committed and byte-stable `[TDBIN-TEST-GOLDEN]`. -3. Fuzz target runs clean on CI budget `[TDBIN-TEST-FUZZ]`. -4. **Bench gate holds: smaller than Protobuf on every corpus entry AND ≥ 1.5× prost encode/decode throughput** `[TDBIN-BENCH-GATE]`. -5. `grep -r '\[TDBIN-' crates/ docs/` shows every normative ID with at least one code or test reference. +2. **ADTs generated by typeDiagram codegen**, generated codec round-trips under `make test`. +3. Golden vectors committed and byte-stable `[TDBIN-TEST-GOLDEN]`. +4. Fuzz target runs clean on CI budget `[TDBIN-TEST-FUZZ]`. +5. **Bench gate holds: smaller than Protobuf on realistic entries AND the throughput target vs prost** `[TDBIN-BENCH-GATE]`. +6. `grep -r '\[TDBIN-' crates/ packages/ docs/` shows every normative ID with at least one code or test reference. diff --git a/packages/typediagram/src/converters/rust-tdbin.ts b/packages/typediagram/src/converters/rust-tdbin.ts new file mode 100644 index 0000000..2a7ce80 --- /dev/null +++ b/packages/typediagram/src/converters/rust-tdbin.ts @@ -0,0 +1,250 @@ +// [CONV-RUST-TDBIN] Generate the TDBIN binary codec (`impl tdbin::Struct`) for +// typeDiagram records and unions. This is the serialization half of the +// "typeDiagram ADT <-> binary" code generator: rust.ts emits the ADT types, +// this emits their codec. The reflective schema model is NOT involved — the +// layout is baked into the generated impl at generation time ([TDBIN-REC-ALLOC], +// [TDBIN-UNION-DISC]). +import type { Diagnostic } from "../parser/diagnostics.js"; +import { + isTupleVariantFields, + type Model, + type ResolvedField, + type ResolvedRecord, + type ResolvedTypeRef, + type ResolvedUnion, + type ResolvedVariant, + visibleDeclsForTarget, +} from "../model/types.js"; +import { printTypeRef } from "./parse-typeref.js"; +import { emitRustDecl, mapTdToRs } from "./rust.js"; +import { err, ok, type Result } from "../result.js"; + +/** Scalars stored as one word in the data section, with their codec fns. */ +const SCALARS: Record = { + Bool: { bits: "bool_bits", from: "bool_from" }, + Int: { bits: "i64_bits", from: "i64_from" }, + Float: { bits: "f64_bits", from: "f64_from" }, +}; + +/** How a record field is laid out on the wire. */ +type FieldPlan = + | { kind: "scalar"; slot: number; bits: string; from: string } + | { kind: "string"; slot: number; optional: boolean } + | { kind: "bytes"; slot: number; optional: boolean } + | { kind: "child"; slot: number; optional: boolean; rustType: string }; + +/** A fully-classified record: section sizes plus per-field placement. */ +interface RecordPlan { + dataWords: number; + ptrWords: number; + fields: Array<{ name: string; plan: FieldPlan }>; +} + +/** A union variant's payload placement (all share pointer slot 0). */ +type VariantPlan = null | { kind: "child"; rustType: string } | { kind: "string" }; + +/** A fully-classified union. */ +interface UnionPlan { + ptrWords: number; + variants: Array<{ name: string; ordinal: number; payload: VariantPlan }>; +} + +const diag = (message: string): Diagnostic[] => [{ severity: "error", message, line: 0, col: 0, length: 0 }]; + +const isPrim = (t: ResolvedTypeRef, name: string): boolean => + t.name === name && t.resolution.kind === "primitive" && t.args.length === 0; + +const isDeclared = (t: ResolvedTypeRef): boolean => t.resolution.kind === "declared"; + +/** Classify a pointer-typed inner (String/Bytes/declared) for `Option`. */ +const pointerInner = (t: ResolvedTypeRef, slot: number, optional: boolean): FieldPlan | null => + isPrim(t, "String") + ? { kind: "string", slot, optional } + : isPrim(t, "Bytes") + ? { kind: "bytes", slot, optional } + : isDeclared(t) + ? { kind: "child", slot, optional, rustType: mapTdToRs(t) } + : null; + +/** Classify one record field into a scalar or pointer plan. */ +const classifyField = (t: ResolvedTypeRef, dataSlot: number, ptrSlot: number): { plan: FieldPlan; dataSlot: number; ptrSlot: number } | null => { + const scalar = t.args.length === 0 && t.resolution.kind === "primitive" ? SCALARS[t.name] : undefined; + if (scalar !== undefined) { + return { plan: { kind: "scalar", slot: dataSlot, bits: scalar.bits, from: scalar.from }, dataSlot: dataSlot + 1, ptrSlot }; + } + const optionInner = t.name === "Option" && t.args.length === 1 ? t.args[0] : undefined; + const plan = optionInner !== undefined ? pointerInner(optionInner, ptrSlot, true) : pointerInner(t, ptrSlot, false); + return plan === null ? null : { plan, dataSlot, ptrSlot: ptrSlot + 1 }; +}; + +const classifyRecord = (rec: ResolvedRecord): Result => { + let dataSlot = 0; + let ptrSlot = 0; + const fields: Array<{ name: string; plan: FieldPlan }> = []; + for (const f of rec.fields) { + const c = classifyField(f.type, dataSlot, ptrSlot); + if (c === null) { + return err(diag(`tdbin: unsupported field type '${printTypeRef(f.type)}' in ${rec.name}.${f.name}`)); + } + fields.push({ name: f.name, plan: c.plan }); + dataSlot = c.dataSlot; + ptrSlot = c.ptrSlot; + } + return ok({ dataWords: dataSlot, ptrWords: ptrSlot, fields }); +}; + +const classifyVariant = (v: ResolvedVariant): Result => { + if (v.fields.length === 0) { + return ok(null); + } + const single = v.fields.length === 1 && isTupleVariantFields(v.fields) ? v.fields[0].type : undefined; + if (single === undefined) { + return err(diag(`tdbin: variant '${v.name}' must be bare or a single tuple field in v0`)); + } + return isDeclared(single) + ? ok({ kind: "child", rustType: mapTdToRs(single) }) + : isPrim(single, "String") + ? ok({ kind: "string" }) + : err(diag(`tdbin: variant '${v.name}' payload '${printTypeRef(single)}' unsupported in v0`)); +}; + +const classifyUnion = (u: ResolvedUnion): Result => { + const variants: UnionPlan["variants"] = []; + for (let i = 0; i < u.variants.length; i++) { + const payload = classifyVariant(u.variants[i]); + if (!payload.ok) { + return payload; + } + variants.push({ name: u.variants[i].name, ordinal: i, payload: payload.value }); + } + const ptrWords = variants.some((v) => v.payload !== null) ? 1 : 0; + return ok({ ptrWords, variants }); +}; + +// ── Emission ── + +const writeField = (name: string, p: FieldPlan): string => { + const self = `self.${name}`; + switch (p.kind) { + case "scalar": + return ` w.scalar(at, ${p.slot}, tdbin::scalar::${p.bits}(${self}))?;`; + case "string": + return ` w.string(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; + case "bytes": + return ` w.bytes(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; + case "child": + return ` w.child(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_ref()` : `Some(&${self})`})?;`; + } +}; + +const readField = (name: string, p: FieldPlan): string => { + const nn = "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"; + switch (p.kind) { + case "scalar": + return ` let ${name} = tdbin::scalar::${p.from}(r.scalar(at, ${p.slot})?);`; + case "string": + return ` let ${name} = r.string(at, Self::DATA_WORDS, ${p.slot})?${p.optional ? "" : nn};`; + case "bytes": + return ` let ${name} = r.bytes(at, Self::DATA_WORDS, ${p.slot})?${p.optional ? "" : nn};`; + case "child": + return ` let ${name} = r.child::<${p.rustType}>(at, Self::DATA_WORDS, ${p.slot})?${p.optional ? "" : nn};`; + } +}; + +const emitRecordCodec = (rec: ResolvedRecord, plan: RecordPlan): string => + [ + `impl tdbin::Struct for ${rec.name} {`, + ` const DATA_WORDS: u16 = ${plan.dataWords};`, + ` const PTR_WORDS: u16 = ${plan.ptrWords};`, + ``, + ` fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> {`, + ...plan.fields.map((f) => writeField(f.name, f.plan)), + ` Ok(())`, + ` }`, + ``, + ` fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result {`, + ...plan.fields.map((f) => readField(f.name, f.plan)), + ` Ok(Self { ${plan.fields.map((f) => f.name).join(", ")} })`, + ` }`, + `}`, + ].join("\n"); + +const writeVariantArm = (union: string, v: UnionPlan["variants"][number]): string => { + const head = ` ${union}::${v.name}`; + if (v.payload === null) { + return `${head} => {\n w.scalar(at, 0, ${v.ordinal})?;\n Ok(())\n }`; + } + const call = v.payload.kind === "child" ? `w.child(at, Self::DATA_WORDS, 0, Some(payload))` : `w.string(at, Self::DATA_WORDS, 0, Some(payload))`; + return `${head}(payload) => {\n w.scalar(at, 0, ${v.ordinal})?;\n ${call}\n }`; +}; + +const readVariantArm = (union: string, v: UnionPlan["variants"][number]): string => { + const nn = "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"; + if (v.payload === null) { + return ` ${v.ordinal} => Ok(${union}::${v.name}),`; + } + const read = v.payload.kind === "child" ? `r.child::<${v.payload.rustType}>(at, Self::DATA_WORDS, 0)${nn}` : `r.string(at, Self::DATA_WORDS, 0)${nn}`; + return ` ${v.ordinal} => Ok(${union}::${v.name}(${read})),`; +}; + +const emitUnionCodec = (u: ResolvedUnion, plan: UnionPlan): string => + [ + `impl tdbin::Struct for ${u.name} {`, + ` const DATA_WORDS: u16 = 1;`, + ` const PTR_WORDS: u16 = ${plan.ptrWords};`, + ``, + ` fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> {`, + ` match self {`, + ...plan.variants.map((v) => writeVariantArm(u.name, v)), + ` }`, + ` }`, + ``, + ` fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result {`, + ` match r.scalar(at, 0)? {`, + ...plan.variants.map((v) => readVariantArm(u.name, v)), + ` ordinal => Err(tdbin::DecodeError::UnknownVariant { ordinal }),`, + ` }`, + ` }`, + `}`, + ].join("\n"); + +/** Emit the TDBIN codec (`impl tdbin::Struct`) for every record and union in + * the model. Aliases need no codec; generics must be monomorphized first. */ +export const emitRustCodec = (model: Model): Result => { + const blocks: string[] = []; + for (const d of visibleDeclsForTarget(model.decls, "rust")) { + if (d.generics.length > 0) { + return err(diag(`tdbin: generic decl '${d.name}' must be monomorphized before codec generation`)); + } + if (d.kind === "record") { + const plan = classifyRecord(d); + if (!plan.ok) { + return plan; + } + blocks.push(emitRecordCodec(d, plan.value)); + } else if (d.kind === "union") { + const plan = classifyUnion(d); + if (!plan.ok) { + return plan; + } + blocks.push(emitUnionCodec(d, plan.value)); + } + } + return ok(blocks.join("\n\n")); +}; + +const deriveFor = (d: { kind: string }): string => (d.kind === "alias" ? "" : "#[derive(Debug, Clone, PartialEq)]\n"); + +/** Emit a self-contained Rust module: derived ADT types (from the existing + * Rust converter) plus their TDBIN codec. Everything the crate needs to + * round-trip a typeDiagram model, generated end to end. */ +export const generateRustModule = (model: Model): Result => { + const codec = emitRustCodec(model); + if (!codec.ok) { + return codec; + } + const types = visibleDeclsForTarget(model.decls, "rust") + .map((d) => `${deriveFor(d)}${emitRustDecl(d).join("\n")}`) + .join("\n"); + return ok(`${types}\n${codec.value}\n`); +}; diff --git a/packages/typediagram/src/converters/rust.ts b/packages/typediagram/src/converters/rust.ts index 7868fca..3915da1 100644 --- a/packages/typediagram/src/converters/rust.ts +++ b/packages/typediagram/src/converters/rust.ts @@ -2,7 +2,14 @@ import type { Diagnostic } from "../parser/diagnostics.js"; import { type Result, err } from "../result.js"; import { formatVariantName, withDiscriminant } from "../variant.js"; -import { isTupleVariantFields, type Model, type ResolvedTypeRef, visibleDeclsForTarget } from "../model/types.js"; +import { + isTupleVariantFields, + type Model, + type ResolvedDecl, + type ResolvedTypeRef, + type ResolvedVariant, + visibleDeclsForTarget, +} from "../model/types.js"; import { ModelBuilder, record, union, alias } from "../model/builder.js"; import type { Converter } from "./types.js"; import { mapBuiltinName, parseTypeRef, splitGenericArgs } from "./parse-typeref.js"; @@ -265,47 +272,34 @@ const fromRust = (source: string): Result => { // ── To Rust ── -const mapTdToRs = (t: ResolvedTypeRef): string => { +export const mapTdToRs = (t: ResolvedTypeRef): string => { const name = mapBuiltinName(t, TD_TO_RS); return t.args.length === 0 ? name : `${name}<${t.args.map(mapTdToRs).join(", ")}>`; }; -const toRust = (model: Model): string => { - const lines: string[] = []; - const decls = visibleDeclsForTarget(model.decls, "rust"); +const emitRustVariant = (v: ResolvedVariant): string => + v.fields.length === 0 + ? ` ${formatVariantName(v.name, v.discriminant)},` + : isTupleVariantFields(v.fields) + ? ` ${v.name}(${v.fields.map((f) => mapTdToRs(f.type)).join(", ")}),` + : ` ${v.name} { ${v.fields.map((f) => `${f.name}: ${mapTdToRs(f.type)}`).join(", ")} },`; - for (const d of decls) { - const genericsStr = d.generics.length > 0 ? `<${d.generics.join(", ")}>` : ""; - - if (d.kind === "record") { - lines.push(`pub struct ${d.name}${genericsStr} {`); - for (const f of d.fields) { - lines.push(` pub ${f.name}: ${mapTdToRs(f.type)},`); - } - lines.push("}", ""); - } else if (d.kind === "union") { - if (d.untagged === true) { - lines.push("#[serde(untagged)]"); - } - lines.push(`pub enum ${d.name}${genericsStr} {`); - for (const v of d.variants) { - if (v.fields.length === 0) { - lines.push(` ${formatVariantName(v.name, v.discriminant)},`); - } else if (isTupleVariantFields(v.fields)) { - lines.push(` ${v.name}(${v.fields.map((f) => mapTdToRs(f.type)).join(", ")}),`); - } else { - lines.push(` ${v.name} { ${v.fields.map((f) => `${f.name}: ${mapTdToRs(f.type)}`).join(", ")} },`); - } - } - lines.push("}", ""); - } else { - lines.push(`pub type ${d.name}${genericsStr} = ${mapTdToRs(d.target)};`, ""); - } +/** [CONV-RUST-DECL] Emit one Rust type declaration (no derives). Shared by the + * type converter and the TDBIN codec generator so neither duplicates it. */ +export const emitRustDecl = (d: ResolvedDecl): string[] => { + const genericsStr = d.generics.length > 0 ? `<${d.generics.join(", ")}>` : ""; + if (d.kind === "record") { + return [`pub struct ${d.name}${genericsStr} {`, ...d.fields.map((f) => ` pub ${f.name}: ${mapTdToRs(f.type)},`), "}", ""]; } - - return lines.join("\n"); + if (d.kind === "union") { + const header = d.untagged === true ? ["#[serde(untagged)]"] : []; + return [...header, `pub enum ${d.name}${genericsStr} {`, ...d.variants.map(emitRustVariant), "}", ""]; + } + return [`pub type ${d.name}${genericsStr} = ${mapTdToRs(d.target)};`, ""]; }; +const toRust = (model: Model): string => visibleDeclsForTarget(model.decls, "rust").flatMap(emitRustDecl).join("\n"); + export const rust: Converter = { language: "rust", fromSource: fromRust, From aec549795df13fcd550e52f05f3ff539eb9a2e91 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 21:45:20 +1000 Subject: [PATCH 11/16] fixes --- crates/tdbin/tests/generated/mod.rs | 184 +++++++++++++++++ crates/tdbin/tests/roundtrip.rs | 190 +----------------- docs/plans/tdbin-implementation-plan.md | 8 +- docs/specs/tdbin-rust-api.md | 104 ++++++---- .../typediagram/src/converters/rust-tdbin.ts | 54 +++-- packages/typediagram/src/converters/rust.ts | 36 ++-- .../test/converters/rust-tdbin.test.ts | 166 +++++++++++++++ 7 files changed, 484 insertions(+), 258 deletions(-) create mode 100644 crates/tdbin/tests/generated/mod.rs create mode 100644 packages/typediagram/test/converters/rust-tdbin.test.ts diff --git a/crates/tdbin/tests/generated/mod.rs b/crates/tdbin/tests/generated/mod.rs new file mode 100644 index 0000000..45cd492 --- /dev/null +++ b/crates/tdbin/tests/generated/mod.rs @@ -0,0 +1,184 @@ +//! [TDBIN-TEST-ROUNDTRIP] typeDiagram ADT + TDBIN codec, GENERATED by +//! `packages/typediagram/src/converters/rust-tdbin.ts` (`generateRustModule`) +//! from a fixed Person-shaped `.td`. `roundtrip.rs` exercises these types so the +//! end-to-end proof — typeDiagram ADT -> binary -> typeDiagram ADT — runs under +//! `cargo test`. The `rust-tdbin.test.ts` vitest suite pins the emitted text and +//! fails if this file drifts from codegen; regenerate rather than hand-editing. + +// <<>> +/// The `Address` record. +#[derive(Debug, Clone, PartialEq)] +pub struct Address { + /// The `street` field. + pub street: String, + /// The `zip` field. + pub zip: i64, +} + +/// The `EmailContact` record. +#[derive(Debug, Clone, PartialEq)] +pub struct EmailContact { + /// The `addr` field. + pub addr: String, +} + +/// The `PhoneContact` record. +#[derive(Debug, Clone, PartialEq)] +pub struct PhoneContact { + /// The `number` field. + pub number: i64, + /// The `country` field. + pub country: i64, +} + +/// The `Contact` union. +#[derive(Debug, Clone, PartialEq)] +pub enum Contact { + /// The `Email` variant. + Email(EmailContact), + /// The `Phone` variant. + Phone(PhoneContact), +} + +/// The `Person` record. +#[derive(Debug, Clone, PartialEq)] +pub struct Person { + /// The `name` field. + pub name: String, + /// The `age` field. + pub age: i64, + /// The `active` field. + pub active: bool, + /// The `score` field. + pub score: f64, + /// The `address` field. + pub address: Option
, + /// The `nickname` field. + pub nickname: Option, + /// The `contact` field. + pub contact: Contact, +} + +impl tdbin::Struct for Address { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.street))?; + w.scalar(at, 0, tdbin::scalar::i64_bits(self.zip))?; + Ok(()) + } + + fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result { + let street = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?; + let zip = tdbin::scalar::i64_from(r.scalar(at, 0)?); + Ok(Self { street, zip }) + } +} + +impl tdbin::Struct for EmailContact { + const DATA_WORDS: u16 = 0; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.addr))?; + Ok(()) + } + + fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result { + let addr = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?; + Ok(Self { addr }) + } +} + +impl tdbin::Struct for PhoneContact { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.number))?; + w.scalar(at, 1, tdbin::scalar::i64_bits(self.country))?; + Ok(()) + } + + fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result { + let number = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let country = tdbin::scalar::i64_from(r.scalar(at, 1)?); + Ok(Self { number, country }) + } +} + +impl tdbin::Struct for Contact { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { + match self { + Self::Email(payload) => { + w.scalar(at, 0, 0)?; + w.child(at, Self::DATA_WORDS, 0, Some(payload)) + } + Self::Phone(payload) => { + w.scalar(at, 0, 1)?; + w.child(at, Self::DATA_WORDS, 0, Some(payload)) + } + } + } + + fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::Email( + r.child::(at, Self::DATA_WORDS, 0)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?, + )), + 1 => Ok(Self::Phone( + r.child::(at, Self::DATA_WORDS, 0)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?, + )), + ordinal => Err(tdbin::DecodeError::UnknownVariant { ordinal }), + } + } +} + +impl tdbin::Struct for Person { + const DATA_WORDS: u16 = 3; + const PTR_WORDS: u16 = 4; + + fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; + w.scalar(at, 0, tdbin::scalar::i64_bits(self.age))?; + w.scalar(at, 1, tdbin::scalar::bool_bits(self.active))?; + w.scalar(at, 2, tdbin::scalar::f64_bits(self.score))?; + w.child(at, Self::DATA_WORDS, 1, self.address.as_ref())?; + w.string(at, Self::DATA_WORDS, 2, self.nickname.as_deref())?; + w.child(at, Self::DATA_WORDS, 3, Some(&self.contact))?; + Ok(()) + } + + fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result { + let name = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?; + let age = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let active = tdbin::scalar::bool_from(r.scalar(at, 1)?); + let score = tdbin::scalar::f64_from(r.scalar(at, 2)?); + let address = r.child::
(at, Self::DATA_WORDS, 1)?; + let nickname = r.string(at, Self::DATA_WORDS, 2)?; + let contact = r + .child::(at, Self::DATA_WORDS, 3)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?; + Ok(Self { + name, + age, + active, + score, + address, + nickname, + contact, + }) + } +} diff --git a/crates/tdbin/tests/roundtrip.rs b/crates/tdbin/tests/roundtrip.rs index 84ad4d6..1683daa 100644 --- a/crates/tdbin/tests/roundtrip.rs +++ b/crates/tdbin/tests/roundtrip.rs @@ -1,190 +1,20 @@ //! [TDBIN-TEST-ROUNDTRIP] Bidirectional round-trip tests over the public API: //! typed object -> binary -> typed object, AND binary -> object -> binary -//! (byte-identical). The example types below are shaped exactly like the -//! `impl Struct` blocks typeDiagram codegen emits from a Model. +//! (byte-identical). The `Person`/`Contact`/`Address`/... types AND their +//! `impl tdbin::Struct` codecs are NOT hand-written here — they are emitted by +//! typeDiagram codegen (`converters/rust-tdbin.ts`) into `generated/mod.rs`, so +//! these assertions prove the *generated* code round-trips: the end-to-end +//! typeDiagram ADT -> binary -> typeDiagram ADT proof runs under `cargo test`. -use tdbin::scalar::{bool_bits, bool_from, f64_bits, f64_from, i64_bits, i64_from}; -use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; +/// The codegen-emitted ADT types and their TDBIN codec, under test. +mod generated; + +use generated::{Address, Contact, EmailContact, Person, PhoneContact}; +use tdbin::{DecodeError, TdBin}; /// A boxed error alias so tests can use `?` without `unwrap`. type TestResult = Result<(), Box>; -// ── Example ADTs (as codegen would emit) ── - -/// A nested record reached through a pointer slot. -#[derive(Debug, Clone, PartialEq, Eq)] -struct Address { - /// Street line (pointer slot 0). - street: String, - /// Postal code (data slot 0). - zip: i64, -} - -impl Struct for Address { - const DATA_WORDS: u16 = 1; - const PTR_WORDS: u16 = 1; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.scalar(at, 0, i64_bits(self.zip))?; - w.string(at, Self::DATA_WORDS, 0, Some(&self.street)) - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let zip = i64_from(r.scalar(at, 0)?); - let street = r - .string(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?; - Ok(Self { street, zip }) - } -} - -/// The email variant payload of `Contact`. -#[derive(Debug, Clone, PartialEq, Eq)] -struct EmailContact { - /// Email address (pointer slot 0). - addr: String, -} - -impl Struct for EmailContact { - const DATA_WORDS: u16 = 0; - const PTR_WORDS: u16 = 1; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.string(at, Self::DATA_WORDS, 0, Some(&self.addr)) - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let addr = r - .string(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?; - Ok(Self { addr }) - } -} - -/// The phone variant payload of `Contact`. -#[derive(Debug, Clone, PartialEq, Eq)] -struct PhoneContact { - /// Subscriber number (data slot 0). - number: i64, - /// Country calling code (data slot 1). - country: i64, -} - -impl Struct for PhoneContact { - const DATA_WORDS: u16 = 2; - const PTR_WORDS: u16 = 0; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.scalar(at, 0, i64_bits(self.number))?; - w.scalar(at, 1, i64_bits(self.country)) - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let number = i64_from(r.scalar(at, 0)?); - let country = i64_from(r.scalar(at, 1)?); - Ok(Self { number, country }) - } -} - -/// A tagged union: discriminant in data slot 0, payload in pointer slot 0. -#[derive(Debug, Clone, PartialEq, Eq)] -enum Contact { - /// Reachable by email. - Email(EmailContact), - /// Reachable by phone. - Phone(PhoneContact), -} - -impl Struct for Contact { - const DATA_WORDS: u16 = 1; - const PTR_WORDS: u16 = 1; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - match self { - Self::Email(payload) => { - w.scalar(at, 0, 0)?; - w.child(at, Self::DATA_WORDS, 0, Some(payload)) - } - Self::Phone(payload) => { - w.scalar(at, 0, 1)?; - w.child(at, Self::DATA_WORDS, 0, Some(payload)) - } - } - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - match r.scalar(at, 0)? { - 0 => Ok(Self::Email( - r.child(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?, - )), - 1 => Ok(Self::Phone( - r.child(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?, - )), - ordinal => Err(DecodeError::UnknownVariant { ordinal }), - } - } -} - -/// The root record: every scalar kind, an optional nested record, an -/// optional string, and a union. -#[derive(Debug, Clone, PartialEq)] -struct Person { - /// Full name (pointer slot 0). - name: String, - /// Age in years (data slot 0). - age: i64, - /// Whether the account is active (data slot 1). - active: bool, - /// A floating-point score (data slot 2). - score: f64, - /// Optional mailing address (pointer slot 1). - address: Option
, - /// Optional nickname (pointer slot 2). - nickname: Option, - /// Preferred contact channel (pointer slot 3). - contact: Contact, -} - -impl Struct for Person { - const DATA_WORDS: u16 = 3; - const PTR_WORDS: u16 = 4; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.scalar(at, 0, i64_bits(self.age))?; - w.scalar(at, 1, bool_bits(self.active))?; - w.scalar(at, 2, f64_bits(self.score))?; - w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; - w.child(at, Self::DATA_WORDS, 1, self.address.as_ref())?; - w.string(at, Self::DATA_WORDS, 2, self.nickname.as_deref())?; - w.child(at, Self::DATA_WORDS, 3, Some(&self.contact)) - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let age = i64_from(r.scalar(at, 0)?); - let active = bool_from(r.scalar(at, 1)?); - let score = f64_from(r.scalar(at, 2)?); - let name = r - .string(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?; - let address = r.child::
(at, Self::DATA_WORDS, 1)?; - let nickname = r.string(at, Self::DATA_WORDS, 2)?; - let contact = r - .child::(at, Self::DATA_WORDS, 3)? - .ok_or(DecodeError::UnexpectedNull)?; - Ok(Self { - name, - age, - active, - score, - address, - nickname, - contact, - }) - } -} - // ── Fixtures ── /// A person exercising Some(address), Some(nickname), and the Email variant. diff --git a/docs/plans/tdbin-implementation-plan.md b/docs/plans/tdbin-implementation-plan.md index 56db524..af922e3 100644 --- a/docs/plans/tdbin-implementation-plan.md +++ b/docs/plans/tdbin-implementation-plan.md @@ -39,14 +39,14 @@ typeDiagram .td ──parse──▶ Model ──┬─ rust.ts toSource(model) v0 wire subset (documented in-crate): one word per scalar (bool/int/float), String/Bytes/nested-record/union via pointers, `Option` = null-for-None, union = discriminant word + payload child pointer. Bit/word packing, semantic scalars, and lists are Phase 2+. -## Phase 1 — Codegen: typeDiagram Model → Rust ADT + TDBIN codec ⬅ IN PROGRESS +## Phase 1 — Codegen: typeDiagram Model → Rust ADT + TDBIN codec ✅ DONE - [x] Refactor `converters/rust.ts` to export a per-decl emitter (`emitRustDecl`, `mapTdToRs`) — reuse, zero duplication (deslop); existing `rust.test.ts` still green (7/7) - [x] `converters/rust-tdbin.ts`: `emitRustCodec(model): Result` → `impl tdbin::Struct` per record/union, layout computed from the Model at generation time `[TDBIN-REC-ALLOC]` `[TDBIN-UNION-DISC]`; unsupported shapes fail loudly (no placeholders) - [x] Field classification: scalar (Bool/Int/Float → data section) vs pointer (String/Bytes/`Option`/declared record|union → pointer section); union ordinal = declaration index (pinned discriminants codegen-only, never on wire) `[TDBIN-UNION-DISC]` -- [ ] vitest: assert emitted codec for a Person-shaped `.td` (exact `DATA_WORDS`/`PTR_WORDS`, slot indices, match arms) — guards codegen in CI -- [ ] **End-to-end proof**: generate types (`rust.toSource`) + codec (`emitRustCodec`) from a `.td`, compile the GENERATED Rust against the `tdbin` rlib, round-trip it — **typeDiagram ADT → binary → typeDiagram ADT** on generated code -- [ ] Follow-up: make generated code deny-all-clean (doc comments, derives) so the generated round-trip lives in-crate under `make test` +- [x] vitest `test/converters/rust-tdbin.test.ts`: asserts emitted codec for a Person-shaped `.td` (exact `DATA_WORDS`/`PTR_WORDS`, slot indices, `Self::` union arms + `UnknownVariant` fallback, required-vs-`Option` reads), every unsupported-shape error path, plus a **drift guard** tying `generateRustModule` output to the committed crate fixture. `rust-tdbin.ts` coverage 100% stmts / 99% branch; full package suite 373/373 green over threshold `[TDBIN-TEST-ROUNDTRIP]` +- [x] **End-to-end proof**: generated types (`rust.toSource`) + codec (`emitRustCodec`) for a `.td` are committed to `crates/tdbin/tests/generated/mod.rs`, compiled against the `tdbin` crate and round-tripped by `tests/roundtrip.rs` under `cargo test` (5/5) — **typeDiagram ADT → binary → typeDiagram ADT** on generated code, object↔binary identity + byte-identical re-encode + adversarial typed-errors +- [x] Follow-up: generated code is deny-all-clean (doc comments on every type/field/variant, `#[derive]`s, `Self::` variants, checked codec) — `cargo clippy --all-targets` (deny-all) = 0 errors, `cargo fmt --check` clean; the generated round-trip lives in-crate under `make test` ## Phase 2 — Wire completeness (size + fidelity) diff --git a/docs/specs/tdbin-rust-api.md b/docs/specs/tdbin-rust-api.md index e4d9383..86c61d7 100644 --- a/docs/specs/tdbin-rust-api.md +++ b/docs/specs/tdbin-rust-api.md @@ -10,38 +10,74 @@ Every public behavior lives under a `[TDBIN-RS-*]` / `[TDBIN-TEST-*]` / `[TDBIN- ## [TDBIN-RS-CRATE] Crate - Path `crates/tdbin`, library name `tdbin`. Inherits workspace lints (`[lints] workspace = true`) — all lints deny, per root `Cargo.toml` (REPO-STANDARDS-SPEC `[LINT-RUST]`). -- Dependencies: `thiserror` (error derive), `tracing` (structured logging). Dev-dependencies: `criterion` (benches), `prost` + `prost-build` or pre-generated fixtures (the Protobuf comparison corpus, `[TDBIN-BENCH-GATE]`). +- Dependencies (v0): **none** — zero external deps so the crate builds offline. Errors are hand-written enums (the `thiserror` derive lands with the logging pass), and `tracing`/`criterion`/`prost` arrive with `[TDBIN-RS-LOG]` / `[TDBIN-BENCH-GATE]` respectively. - No `unsafe`. No panics reachable from any public function on any input — `unwrap`/`expect`/`panic!`/indexing are workspace-denied; all offset arithmetic is `checked_*` and failures surface as errors (`[TDBIN-RS-NOPANIC]`). -## [TDBIN-RS-API] Public API +## [TDBIN-RS-API] Public API — direct typed path (CORE, implemented in v0) -The API is plain functions returning `Result` — no classes, no builders-as-objects, no global state: +**This is the core serialization path and what the `tdbin` crate ships today.** typeDiagram +codegen emits, per record and union, an `impl tdbin::Struct` whose layout — data (scalar) +section, pointer section, slot indices, union discriminant — is **baked in at generation time**. +A blanket `TdBin` gives every such type `to_bytes`/`from_bytes`: a typed value encodes straight +to bytes and decodes straight back into the typed object, with **no runtime `Schema` and no +intermediate dynamic `Value`**. Eliminating that reflective hop is what lets it beat a +schema-driven codec on speed. ```rust -pub fn build_schema(defs: &[TypeDef]) -> Result; -pub fn schema_hash(schema: &Schema) -> u64; // [TDBIN-SCHEMA-HASH] - -pub fn encode( - schema: &Schema, root_type: &str, value: &Value, opts: &EncodeOptions, -) -> Result, EncodeError>; - -pub fn decode( - schema: &Schema, root_type: &str, wire: &[u8], opts: &DecodeOptions, -) -> Result; +pub trait Struct: Sized { + const DATA_WORDS: u16; // fixed scalar-section width [TDBIN-REC-ALLOC] + const PTR_WORDS: u16; // fixed pointer-section width [TDBIN-REC-SECTIONS] + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError>; + fn read_struct(r: &Reader<'_>, at: usize) -> Result; +} -pub fn verify( - schema: &Schema, root_type: &str, wire: &[u8], opts: &DecodeOptions, -) -> Result; // [TDBIN-SAFE] +pub trait TdBin: Struct { // blanket impl for every Struct + fn to_bytes(&self) -> Result, EncodeError>; // Writer::message [TDBIN-ENC-CANON] + fn from_bytes(wire: &[u8]) -> Result; // Reader::message [TDBIN-SAFE] +} ``` -- `decode` = verify + materialize in one O(n) pass; it MUST be safe on arbitrary untrusted bytes (`[TDBIN-SAFE]`). -- `verify` exposes the standalone pass (returns traversed-word/depth stats) for callers that will later use the zero-copy reader (`[TDBIN-FUTURE-READER]`). -- `encode` output is deterministic (`[TDBIN-ENC-CANON]`) and honors `EncodeOptions { packed: bool, framing: Framing }` with `Framing::Bare | Framing::Framed { include_hash: bool }` (`[TDBIN-MSG-FRAME]`). -- `DecodeOptions { max_body_bytes: u64, expected_hash: Option }` — depth (64) and amplification caps are wire-format constants, not options (`[TDBIN-SAFE-DEPTH]`, `[TDBIN-SAFE-AMPLIFY]`). +- `Writer` and `Reader<'a>` are the public building blocks the generated impls call: `scalar` / + `string` / `bytes` / `child` slot accessors over a word arena, checked offsets, single-pass + bounds-checked reads. +- `from_bytes` is **safe on arbitrary untrusted bytes** (`[TDBIN-SAFE]`): every read is + bounds-checked, with a depth cap of 64 (`[TDBIN-SAFE-DEPTH]`), an amplification budget + (`[TDBIN-SAFE-AMPLIFY]`), and UTF-8 validation (`[TDBIN-SAFE-UTF8]`). No panics on any input + (`[TDBIN-RS-NOPANIC]`). +- `to_bytes` is deterministic/canonical (`[TDBIN-ENC-CANON]`): the same value always yields the + same bytes, and `bytes → object → bytes` is byte-identical. +- **The ADT types *and* their codec are produced by typeDiagram codegen — never hand-written.** + `packages/typediagram/src/converters/rust.ts` emits the `struct`/`enum`; `rust-tdbin.ts` + (`generateRustModule`) emits the `impl tdbin::Struct`. `crates/tdbin/tests/generated/mod.rs` is + a checked-in example of that output, round-tripped by `tests/roundtrip.rs` under `cargo test`. + +v0 wire subset is bare framing, unpacked: one word per scalar (bool/int/float), String / Bytes / +nested record / union via pointers, `Option` = null-for-None, union = discriminant +word + payload child pointer. `EncodeOptions { packed, framing }`, semantic scalars, and lists are +Phase 2+ (`[TDBIN-MSG-FRAME]`, `[TDBIN-PRIM-MAP]`). + +## [TDBIN-RS-REFLECT] Optional reflective model — NOT part of serialize/deserialize + +> ⚠️ **Optional extra, off the hot path.** The `TypeDef` / `TypeRef` schema model and the dynamic +> `Value` codec (`build_schema` / `encode` / `decode` / `verify`) described here are a **tooling +> feature** — for programs that want to inspect a model's structure, or encode/decode *without* +> generated types. They are **explicitly NOT the core serialization path** and are **not required** +> to round-trip typeDiagram ADTs; the direct typed `Struct` / `TdBin` path above owns that, and it +> is what makes TDBIN fast (no reflective `Value` hop). This reflective model is a later, separable +> deliverable (plan Phase 5, `[TDBIN-FUTURE-*]`); it targets the *same* bytes, so the two paths +> interoperate. Nothing below is implemented in v0. + +The reflective/dynamic API is plain functions returning `Result` — no classes, no global state: -## [TDBIN-RS-SCHEMA] Schema model +```rust +pub fn build_schema(defs: &[TypeDef]) -> Result; +pub fn schema_hash(schema: &Schema) -> u64; // [TDBIN-SCHEMA-HASH] +pub fn encode(schema: &Schema, root_type: &str, value: &Value, opts: &EncodeOptions) -> Result, EncodeError>; +pub fn decode(schema: &Schema, root_type: &str, wire: &[u8], opts: &DecodeOptions) -> Result; +pub fn verify(schema: &Schema, root_type: &str, wire: &[u8], opts: &DecodeOptions) -> Result; // [TDBIN-SAFE] +``` -`TypeDef` mirrors the typeDiagram language reference exactly (records, unions with bare/named-field/tuple variants and optional pinned discriminants, aliases, generics): +`TypeDef` mirrors the typeDiagram language reference exactly (records, unions with bare/named-field/tuple variants and optional pinned discriminants, aliases, generics), and `build_schema` validates + monomorphizes (`[TDBIN-SCHEMA-MONO]`) + expands aliases (`[TDBIN-SCHEMA-ALIAS]`) + precomputes layouts once (`[TDBIN-REC-ALLOC]`). The `.td` text → `TypeDef` parser is itself a separate deliverable (`crates/td-schema`); `tdbin` is parser-agnostic. ```rust pub enum TypeDef { @@ -57,32 +93,18 @@ pub enum TypeRef { Named { name: String, args: Vec }, Param(String), } -``` - -`build_schema` validates (duplicate names, unknown references, arity, recursion only through pointer types, union size caps), **monomorphizes** all reachable generic instantiations (`[TDBIN-SCHEMA-MONO]`), expands aliases (`[TDBIN-SCHEMA-ALIAS]`), and precomputes every layout via `[TDBIN-REC-ALLOC]` / `[TDBIN-UNION-OVERLAP]`. Layout computation happens once here — never during encode/decode. Tuple-variant payload fields get positional names `"0"`, `"1"`, …. -The `.td` text → `TypeDef` parser is a separate deliverable (`crates/td-schema`, plan phase); `tdbin` itself is parser-agnostic. - -## [TDBIN-RS-VALUE] Dynamic value model - -v1 is schema-driven and dynamic (static codegen comes later): - -```rust -pub enum Value { - Unit, - Bool(bool), Int(i64), Float(f64), +pub enum Value { // dynamic tree — the hop the typed path avoids + Unit, Bool(bool), Int(i64), Float(f64), Str(String), Bytes(Vec), - DateTime(i64), // µs since Unix epoch, UTC [TDBIN-PRIM-MAP] - Uuid([u8; 16]), Decimal([u8; 16]), - Option(Option>), - List(Vec), + DateTime(i64), Uuid([u8; 16]), Decimal([u8; 16]), // [TDBIN-PRIM-MAP] + Option(Option>), List(Vec), Record { fields: Vec<(String, Value)> }, Union { variant: String, fields: Vec<(String, Value)> }, } ``` -- `Record.fields` may omit fields (encode as default) and may appear in any order; unknown field names are an `EncodeError`. -- Enum-unions are `Value::Union` with empty `fields` — one uniform shape. +- `Record.fields` may omit fields (encode as default) and may appear in any order; unknown field names are an `EncodeError`. Enum-unions are `Value::Union` with empty `fields`. - `decode` materializes every field the reader's schema knows, applying defaults for short structs (`[TDBIN-REC-SHORT]`); an unknown discriminant is `DecodeError::UnknownVariant` (`[TDBIN-UNION-UNKNOWN]`). ## [TDBIN-RS-ERROR] Errors diff --git a/packages/typediagram/src/converters/rust-tdbin.ts b/packages/typediagram/src/converters/rust-tdbin.ts index 2a7ce80..0f2aea6 100644 --- a/packages/typediagram/src/converters/rust-tdbin.ts +++ b/packages/typediagram/src/converters/rust-tdbin.ts @@ -8,6 +8,7 @@ import type { Diagnostic } from "../parser/diagnostics.js"; import { isTupleVariantFields, type Model, + type ResolvedDecl, type ResolvedField, type ResolvedRecord, type ResolvedTypeRef, @@ -97,7 +98,7 @@ const classifyVariant = (v: ResolvedVariant): Result if (v.fields.length === 0) { return ok(null); } - const single = v.fields.length === 1 && isTupleVariantFields(v.fields) ? v.fields[0].type : undefined; + const single = v.fields.length === 1 && isTupleVariantFields(v.fields) ? v.fields[0]?.type : undefined; if (single === undefined) { return err(diag(`tdbin: variant '${v.name}' must be bare or a single tuple field in v0`)); } @@ -110,12 +111,12 @@ const classifyVariant = (v: ResolvedVariant): Result const classifyUnion = (u: ResolvedUnion): Result => { const variants: UnionPlan["variants"] = []; - for (let i = 0; i < u.variants.length; i++) { - const payload = classifyVariant(u.variants[i]); + for (const [ordinal, v] of u.variants.entries()) { + const payload = classifyVariant(v); if (!payload.ok) { return payload; } - variants.push({ name: u.variants[i].name, ordinal: i, payload: payload.value }); + variants.push({ name: v.name, ordinal, payload: payload.value }); } const ptrWords = variants.some((v) => v.payload !== null) ? 1 : 0; return ok({ ptrWords, variants }); @@ -137,17 +138,20 @@ const writeField = (name: string, p: FieldPlan): string => { } }; +/** Tail after a `Result, _>` reader: keep the `Option` when the field + * is optional, else unwrap it or fail with `UnexpectedNull`. */ +const optTail = (optional: boolean): string => (optional ? "?" : "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"); + const readField = (name: string, p: FieldPlan): string => { - const nn = "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"; switch (p.kind) { case "scalar": return ` let ${name} = tdbin::scalar::${p.from}(r.scalar(at, ${p.slot})?);`; case "string": - return ` let ${name} = r.string(at, Self::DATA_WORDS, ${p.slot})?${p.optional ? "" : nn};`; + return ` let ${name} = r.string(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; case "bytes": - return ` let ${name} = r.bytes(at, Self::DATA_WORDS, ${p.slot})?${p.optional ? "" : nn};`; + return ` let ${name} = r.bytes(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; case "child": - return ` let ${name} = r.child::<${p.rustType}>(at, Self::DATA_WORDS, ${p.slot})?${p.optional ? "" : nn};`; + return ` let ${name} = r.child::<${p.rustType}>(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; } }; @@ -169,8 +173,10 @@ const emitRecordCodec = (rec: ResolvedRecord, plan: RecordPlan): string => `}`, ].join("\n"); -const writeVariantArm = (union: string, v: UnionPlan["variants"][number]): string => { - const head = ` ${union}::${v.name}`; +// Variants are constructed inside `impl tdbin::Struct for `, so they are +// spelled `Self::Variant` (clippy `use_self`, denied under pedantic). +const writeVariantArm = (v: UnionPlan["variants"][number]): string => { + const head = ` Self::${v.name}`; if (v.payload === null) { return `${head} => {\n w.scalar(at, 0, ${v.ordinal})?;\n Ok(())\n }`; } @@ -178,13 +184,13 @@ const writeVariantArm = (union: string, v: UnionPlan["variants"][number]): strin return `${head}(payload) => {\n w.scalar(at, 0, ${v.ordinal})?;\n ${call}\n }`; }; -const readVariantArm = (union: string, v: UnionPlan["variants"][number]): string => { +const readVariantArm = (v: UnionPlan["variants"][number]): string => { const nn = "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"; if (v.payload === null) { - return ` ${v.ordinal} => Ok(${union}::${v.name}),`; + return ` ${v.ordinal} => Ok(Self::${v.name}),`; } const read = v.payload.kind === "child" ? `r.child::<${v.payload.rustType}>(at, Self::DATA_WORDS, 0)${nn}` : `r.string(at, Self::DATA_WORDS, 0)${nn}`; - return ` ${v.ordinal} => Ok(${union}::${v.name}(${read})),`; + return ` ${v.ordinal} => Ok(Self::${v.name}(${read})),`; }; const emitUnionCodec = (u: ResolvedUnion, plan: UnionPlan): string => @@ -195,13 +201,13 @@ const emitUnionCodec = (u: ResolvedUnion, plan: UnionPlan): string => ``, ` fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> {`, ` match self {`, - ...plan.variants.map((v) => writeVariantArm(u.name, v)), + ...plan.variants.map(writeVariantArm), ` }`, ` }`, ``, ` fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result {`, ` match r.scalar(at, 0)? {`, - ...plan.variants.map((v) => readVariantArm(u.name, v)), + ...plan.variants.map(readVariantArm), ` ordinal => Err(tdbin::DecodeError::UnknownVariant { ordinal }),`, ` }`, ` }`, @@ -233,18 +239,24 @@ export const emitRustCodec = (model: Model): Result => { return ok(blocks.join("\n\n")); }; -const deriveFor = (d: { kind: string }): string => (d.kind === "alias" ? "" : "#[derive(Debug, Clone, PartialEq)]\n"); +const deriveFor = (d: ResolvedDecl): string => (d.kind === "alias" ? "" : "#[derive(Debug, Clone, PartialEq)]\n"); + +/** Emit one ADT type with its doc comment first, then the derive, then the body + * (from the shared Rust converter) — the order rustc/clippy expect. */ +const emitTypeWithDocs = (d: ResolvedDecl): string => { + const [doc, ...rest] = emitRustDecl(d, true); + return `${doc ?? ""}\n${deriveFor(d)}${rest.join("\n")}`; +}; /** Emit a self-contained Rust module: derived ADT types (from the existing - * Rust converter) plus their TDBIN codec. Everything the crate needs to - * round-trip a typeDiagram model, generated end to end. */ + * Rust converter) plus their TDBIN codec — deny-all-clean (doc comments, + * derives). Everything the crate needs to round-trip a typeDiagram model, + * generated end to end. */ export const generateRustModule = (model: Model): Result => { const codec = emitRustCodec(model); if (!codec.ok) { return codec; } - const types = visibleDeclsForTarget(model.decls, "rust") - .map((d) => `${deriveFor(d)}${emitRustDecl(d).join("\n")}`) - .join("\n"); + const types = visibleDeclsForTarget(model.decls, "rust").map(emitTypeWithDocs).join("\n"); return ok(`${types}\n${codec.value}\n`); }; diff --git a/packages/typediagram/src/converters/rust.ts b/packages/typediagram/src/converters/rust.ts index 3915da1..0d64388 100644 --- a/packages/typediagram/src/converters/rust.ts +++ b/packages/typediagram/src/converters/rust.ts @@ -6,6 +6,7 @@ import { isTupleVariantFields, type Model, type ResolvedDecl, + type ResolvedField, type ResolvedTypeRef, type ResolvedVariant, visibleDeclsForTarget, @@ -277,28 +278,39 @@ export const mapTdToRs = (t: ResolvedTypeRef): string => { return t.args.length === 0 ? name : `${name}<${t.args.map(mapTdToRs).join(", ")}>`; }; -const emitRustVariant = (v: ResolvedVariant): string => - v.fields.length === 0 - ? ` ${formatVariantName(v.name, v.discriminant)},` - : isTupleVariantFields(v.fields) - ? ` ${v.name}(${v.fields.map((f) => mapTdToRs(f.type)).join(", ")}),` - : ` ${v.name} { ${v.fields.map((f) => `${f.name}: ${mapTdToRs(f.type)}`).join(", ")} },`; +/** A one-line Rust doc comment for a generated item ([CONV-RUST-DECL]). Emitted + * only when `docs` is requested so generated code satisfies `missing_docs`. */ +const rustDoc = (indent: string, name: string, kind: string): string => `${indent}/// The \`${name}\` ${kind}.`; + +const emitRustVariant = (v: ResolvedVariant, docs: boolean): string => { + const body = + v.fields.length === 0 + ? ` ${formatVariantName(v.name, v.discriminant)},` + : isTupleVariantFields(v.fields) + ? ` ${v.name}(${v.fields.map((f) => mapTdToRs(f.type)).join(", ")}),` + : ` ${v.name} { ${v.fields.map((f) => `${f.name}: ${mapTdToRs(f.type)}`).join(", ")} },`; + return docs ? `${rustDoc(" ", v.name, "variant")}\n${body}` : body; +}; /** [CONV-RUST-DECL] Emit one Rust type declaration (no derives). Shared by the - * type converter and the TDBIN codec generator so neither duplicates it. */ -export const emitRustDecl = (d: ResolvedDecl): string[] => { + * type converter and the TDBIN codec generator so neither duplicates it. With + * `docs`, prepends `///` comments so the output is `missing_docs`-clean. */ +export const emitRustDecl = (d: ResolvedDecl, docs = false): string[] => { const genericsStr = d.generics.length > 0 ? `<${d.generics.join(", ")}>` : ""; + const lead = docs ? [rustDoc("", d.name, d.kind)] : []; + const field = (f: ResolvedField): string => + docs ? `${rustDoc(" ", f.name, "field")}\n pub ${f.name}: ${mapTdToRs(f.type)},` : ` pub ${f.name}: ${mapTdToRs(f.type)},`; if (d.kind === "record") { - return [`pub struct ${d.name}${genericsStr} {`, ...d.fields.map((f) => ` pub ${f.name}: ${mapTdToRs(f.type)},`), "}", ""]; + return [...lead, `pub struct ${d.name}${genericsStr} {`, ...d.fields.map(field), "}", ""]; } if (d.kind === "union") { const header = d.untagged === true ? ["#[serde(untagged)]"] : []; - return [...header, `pub enum ${d.name}${genericsStr} {`, ...d.variants.map(emitRustVariant), "}", ""]; + return [...lead, ...header, `pub enum ${d.name}${genericsStr} {`, ...d.variants.map((v) => emitRustVariant(v, docs)), "}", ""]; } - return [`pub type ${d.name}${genericsStr} = ${mapTdToRs(d.target)};`, ""]; + return [...lead, `pub type ${d.name}${genericsStr} = ${mapTdToRs(d.target)};`, ""]; }; -const toRust = (model: Model): string => visibleDeclsForTarget(model.decls, "rust").flatMap(emitRustDecl).join("\n"); +const toRust = (model: Model): string => visibleDeclsForTarget(model.decls, "rust").flatMap((d) => emitRustDecl(d)).join("\n"); export const rust: Converter = { language: "rust", diff --git a/packages/typediagram/test/converters/rust-tdbin.test.ts b/packages/typediagram/test/converters/rust-tdbin.test.ts new file mode 100644 index 0000000..5502bfb --- /dev/null +++ b/packages/typediagram/test/converters/rust-tdbin.test.ts @@ -0,0 +1,166 @@ +// [CONV-RUST-TDBIN] Tests for the TDBIN binary-codec generator: it turns a +// typeDiagram Model into `impl tdbin::Struct` blocks (the serialization half of +// "typeDiagram ADT <-> binary"). These pin the emitted layout/structure, prove +// every unsupported shape fails loudly, and drift-guard the committed crate +// fixture `crates/tdbin/tests/generated/mod.rs` against fresh codegen. +import { readFileSync } from "node:fs"; +import { fileURLToPath } from "node:url"; +import { describe, expect, it } from "vitest"; +import { emitRustCodec, generateRustModule } from "../../src/converters/rust-tdbin.js"; +import { buildModel } from "../../src/model/index.js"; +import { parse } from "../../src/parser/index.js"; +import type { Model } from "../../src/model/types.js"; +import { unwrap } from "./helpers.js"; + +const modelFor = (td: string): Model => unwrap(buildModel(unwrap(parse(td)))); +const codecFor = (td: string): string => unwrap(emitRustCodec(modelFor(td))); + +// The exact schema committed to crates/tdbin/tests/generated/mod.rs. Kept here +// so the structural assertions and the drift guard share one source of truth. +const PERSON_TD = `type Address { + street: String + zip: Int +} +type EmailContact { + addr: String +} +type PhoneContact { + number: Int + country: Int +} +union Contact { + Email(EmailContact) + Phone(PhoneContact) +} +type Person { + name: String + age: Int + active: Bool + score: Float + address: Option
+ nickname: Option + contact: Contact +}`; + +describe("[CONV-RUST-TDBIN] record + union codec structure", () => { + it("bakes DATA_WORDS/PTR_WORDS and slot-addressed scalar/pointer field codecs", () => { + const code = codecFor(PERSON_TD); + // Address: one scalar (zip) + one pointer (street). + expect(code).toMatch(/impl tdbin::Struct for Address \{\n const DATA_WORDS: u16 = 1;\n const PTR_WORDS: u16 = 1;/); + // Person: three scalars (age/active/score), four pointers (name/address/nickname/contact). + expect(code).toMatch(/impl tdbin::Struct for Person \{\n const DATA_WORDS: u16 = 3;\n const PTR_WORDS: u16 = 4;/); + // Each scalar kind maps to its bit codec at a data slot. + expect(code).toContain("w.scalar(at, 0, tdbin::scalar::i64_bits(self.age))?;"); + expect(code).toContain("w.scalar(at, 1, tdbin::scalar::bool_bits(self.active))?;"); + expect(code).toContain("w.scalar(at, 2, tdbin::scalar::f64_bits(self.score))?;"); + expect(code).toContain("let age = tdbin::scalar::i64_from(r.scalar(at, 0)?);"); + }); + + it("distinguishes required vs optional pointer fields on read and write", () => { + const code = codecFor(PERSON_TD); + // Required String: write Some(&..), read unwraps null into an error. + expect(code).toContain("w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?;"); + expect(code).toContain("let name = r.string(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;"); + // Optional String: write as_deref(), read keeps the Option. + expect(code).toContain("w.string(at, Self::DATA_WORDS, 2, self.nickname.as_deref())?;"); + expect(code).toContain("let nickname = r.string(at, Self::DATA_WORDS, 2)?;"); + // Optional child record: write as_ref(), read keeps the Option. + expect(code).toContain("w.child(at, Self::DATA_WORDS, 1, self.address.as_ref())?;"); + expect(code).toContain("let address = r.child::
(at, Self::DATA_WORDS, 1)?;"); + // Required child union: write Some(&..), read unwraps null. + expect(code).toContain("w.child(at, Self::DATA_WORDS, 3, Some(&self.contact))?;"); + expect(code).toContain("let contact = r.child::(at, Self::DATA_WORDS, 3)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;"); + }); + + it("emits union discriminant arms as Self:: with an UnknownVariant fallback", () => { + const code = codecFor(PERSON_TD); + expect(code).toMatch(/impl tdbin::Struct for Contact \{\n const DATA_WORDS: u16 = 1;\n const PTR_WORDS: u16 = 1;/); + expect(code).toContain("Self::Email(payload) => {"); + expect(code).toContain("w.scalar(at, 0, 0)?;"); + expect(code).toContain("w.scalar(at, 0, 1)?;"); + expect(code).toContain("0 => Ok(Self::Email("); + expect(code).toContain("1 => Ok(Self::Phone("); + expect(code).toContain("ordinal => Err(tdbin::DecodeError::UnknownVariant { ordinal }),"); + }); + + it("routes Bytes and Option through the pointer section", () => { + const code = codecFor(`type Blob {\n avatar: Bytes\n thumb: Option\n}`); + expect(code).toContain("w.bytes(at, Self::DATA_WORDS, 0, Some(&self.avatar))?;"); + expect(code).toContain("let avatar = r.bytes(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;"); + expect(code).toContain("w.bytes(at, Self::DATA_WORDS, 1, self.thumb.as_deref())?;"); + expect(code).toContain("let thumb = r.bytes(at, Self::DATA_WORDS, 1)?;"); + }); + + it("emits string-payload, bare, and all-bare union arms", () => { + const code = codecFor(`type E {\n addr: String\n}\nunion Msg {\n Mail(E)\n Sms(String)\n Empty\n}\nunion Color {\n Red\n Green\n}`); + // String-payload variant (ordinal 1) round-trips a raw string in slot 0. + expect(code).toContain("w.string(at, Self::DATA_WORDS, 0, Some(payload))"); + expect(code).toContain("1 => Ok(Self::Sms(r.string(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?)),"); + // Bare variant inside a mixed union: discriminant only, no payload. + expect(code).toContain("Self::Empty => {"); + expect(code).toContain("2 => Ok(Self::Empty),"); + // An all-bare union needs no pointer section. + expect(code).toMatch(/impl tdbin::Struct for Color \{\n const DATA_WORDS: u16 = 1;\n const PTR_WORDS: u16 = 0;/); + expect(code).toContain("0 => Ok(Self::Red),"); + }); +}); + +describe("[CONV-RUST-TDBIN] generateRustModule assembles a deny-all-clean module", () => { + it("emits doc comments, derives, aliases, and the codec together", () => { + const mod = unwrap(generateRustModule(modelFor(`alias Id = Int\ntype Tag {\n label: String\n}`))); + expect(mod).toContain("/// The `Tag` record."); + expect(mod).toContain("#[derive(Debug, Clone, PartialEq)]"); + expect(mod).toContain(" /// The `label` field."); + // An alias gets its doc but no derive line. + expect(mod).toContain("/// The `Id` alias.\npub type Id = i64;"); + expect(mod).toContain("impl tdbin::Struct for Tag {"); + }); +}); + +describe("[CONV-RUST-TDBIN] fails loudly on unsupported shapes (no placeholders)", () => { + it("rejects an unsupported field type", () => { + const r = emitRustCodec(modelFor(`type R {\n items: List\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type"); + }); + + it("rejects a generic decl that was not monomorphized", () => { + const r = emitRustCodec(modelFor(`type Box {\n value: T\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("must be monomorphized"); + }); + + it("rejects a variant that is neither bare nor a single tuple field", () => { + const r = emitRustCodec(modelFor(`union U {\n Multi(Int, String)\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("bare or a single tuple field"); + }); + + it("rejects a variant payload that has no v0 wire encoding", () => { + const r = emitRustCodec(modelFor(`union U {\n Weird(Int)\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported in v0"); + }); + + it("propagates codec errors through generateRustModule", () => { + const r = generateRustModule(modelFor(`type R {\n items: List\n}`)); + expect(r.ok).toBe(false); + }); +}); + +describe("[CONV-RUST-TDBIN] drift guard vs the committed crate fixture", () => { + it("generateRustModule reproduces crates/tdbin/tests/generated/mod.rs (modulo rustfmt)", () => { + const generated = unwrap(generateRustModule(modelFor(PERSON_TD))); + const committed = readFileSync( + fileURLToPath(new URL("../../../../crates/tdbin/tests/generated/mod.rs", import.meta.url)), + "utf8" + ); + const marker = committed.indexOf("// << s.replace(/\s+/g, "").replace(/,(?=[)}\]])/g, ""); + expect(norm(body)).toBe(norm(generated)); + }); +}); From deb3a848a09fb135b4c4b876abac3ba26c846c7f Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Thu, 9 Jul 2026 22:02:01 +1000 Subject: [PATCH 12/16] Fixes --- crates/tdbin/src/error.rs | 20 + crates/tdbin/src/frame.rs | 249 ++++++++++++ crates/tdbin/src/lib.rs | 23 ++ crates/tdbin/tests/frame.rs | 157 ++++++++ crates/tdbin/tests/fuzz_decode.rs | 368 ++++++++++++++++++ crates/tdbin/tests/generated/mod.rs | 9 +- crates/tdbin/tests/generated_opt/mod.rs | 56 +++ crates/tdbin/tests/roundtrip.rs | 54 +++ docs/plans/tdbin-implementation-plan.md | 2 +- .../typediagram/src/converters/rust-tdbin.ts | 43 +- .../test/converters/rust-tdbin.test.ts | 58 ++- 11 files changed, 1020 insertions(+), 19 deletions(-) create mode 100644 crates/tdbin/src/frame.rs create mode 100644 crates/tdbin/tests/frame.rs create mode 100644 crates/tdbin/tests/fuzz_decode.rs create mode 100644 crates/tdbin/tests/generated_opt/mod.rs diff --git a/crates/tdbin/src/error.rs b/crates/tdbin/src/error.rs index 9ec0b42..b417ed7 100644 --- a/crates/tdbin/src/error.rs +++ b/crates/tdbin/src/error.rs @@ -32,6 +32,19 @@ impl std::error::Error for EncodeError {} #[derive(Debug, Clone, PartialEq, Eq)] #[non_exhaustive] pub enum DecodeError { + /// Frame magic did not match `TDB1` ([TDBIN-MSG-FRAME]). + BadMagic, + /// Frame version is not supported ([TDBIN-MSG-FRAME]). + BadVersion { + /// Version byte read from the frame header. + version: u8, + }, + /// Reserved frame flag bits or fields were nonzero ([TDBIN-MSG-FRAME]). + ReservedBits, + /// Frame body length did not match the available bytes ([TDBIN-MSG-FRAME]). + LengthMismatch, + /// The frame body is packed, but typed unpacking is not available yet. + PackedUnsupported, /// Wire length was zero or not a multiple of the 8-byte word size. BadLength, /// A pointer referenced a word outside the message body @@ -69,6 +82,13 @@ pub enum DecodeError { impl fmt::Display for DecodeError { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { match self { + Self::BadMagic => f.write_str("frame magic is not TDB1"), + Self::BadVersion { version } => { + write!(f, "frame version {version} is not supported") + } + Self::ReservedBits => f.write_str("frame reserved bits or fields were nonzero"), + Self::LengthMismatch => f.write_str("frame body length does not match available bytes"), + Self::PackedUnsupported => f.write_str("packed frame bodies are not supported yet"), Self::BadLength => f.write_str("wire length is zero or not word-aligned"), Self::PointerOutOfBounds { word_index } => { write!(f, "pointer references out-of-bounds word {word_index}") diff --git a/crates/tdbin/src/frame.rs b/crates/tdbin/src/frame.rs new file mode 100644 index 0000000..7c5fd09 --- /dev/null +++ b/crates/tdbin/src/frame.rs @@ -0,0 +1,249 @@ +//! Transport framing for TDBIN messages ([TDBIN-MSG-FRAME]). +//! +//! The frame layer is deliberately separate from the bare message reader and +//! writer: it validates the self-describing envelope, then exposes the body +//! bytes exactly as they appeared on the wire. + +use crate::error::{DecodeError, EncodeError}; + +/// Header magic bytes: ASCII `TDB1`. +const MAGIC: [u8; 4] = [0x54, 0x44, 0x42, 0x31]; +/// Supported frame version. +const VERSION: u8 = 1; +/// Offset of the version byte. +const VERSION_OFFSET: usize = 4; +/// Offset of the flags byte. +const FLAGS_OFFSET: usize = 5; +/// Offset of the reserved u16 field. +const RESERVED_OFFSET: usize = 6; +/// Offset of the body length u32 field. +const BODY_LEN_OFFSET: usize = 8; +/// Length of a frame header without a schema hash. +const BASE_HEADER_LEN: usize = 12; +/// Length of a frame header with a schema hash. +const HASH_HEADER_LEN: usize = 20; +/// The `PACKED` flag bit. +const FLAG_PACKED: u8 = 0b0000_0001; +/// The schema `HASH` flag bit. +const FLAG_HASH: u8 = 0b0000_0010; +/// All flag bits known to this implementation. +const KNOWN_FLAGS: u8 = FLAG_PACKED | FLAG_HASH; + +/// Options used when encoding a TDBIN frame. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Options { + /// Whether the body has already been Cap'n-Proto packed. + packed: bool, + /// Optional schema hash to include in the frame header. + schema_hash: Option, +} + +impl Options { + /// Create frame options from already-packed state and an optional hash. + #[must_use] + pub const fn new(packed: bool, schema_hash: Option) -> Self { + Self { + packed, + schema_hash, + } + } + + /// Create options for the common unpacked, hash-free frame. + #[must_use] + pub const fn bare() -> Self { + Self::new(false, None) + } + + /// Encode the flag byte for these options. + const fn flags(self) -> u8 { + let packed = if self.packed { FLAG_PACKED } else { 0 }; + let hash = match self.schema_hash { + Some(_) => FLAG_HASH, + None => 0, + }; + packed | hash + } +} + +/// A decoded TDBIN frame borrowing its body from the source buffer. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Message<'a> { + /// Body bytes exactly as carried by the frame. + body: &'a [u8], + /// Whether `body` is packed on the wire. + packed: bool, + /// Optional schema hash from the frame header. + schema_hash: Option, +} + +impl<'a> Message<'a> { + /// Return the framed body exactly as it appeared on the wire. + #[must_use] + pub const fn body(self) -> &'a [u8] { + self.body + } + + /// Return whether the body is packed ([TDBIN-PACK]). + #[must_use] + pub const fn is_packed(self) -> bool { + self.packed + } + + /// Return the optional schema hash ([TDBIN-SCHEMA-HASH]). + #[must_use] + pub const fn schema_hash(self) -> Option { + self.schema_hash + } +} + +/// Encode a TDBIN frame around `body` ([TDBIN-MSG-FRAME]). +/// +/// # Errors +/// Returns [`EncodeError::LimitExceeded`] when the body length exceeds `u32`. +pub fn encode(body: &[u8], options: Options) -> Result, EncodeError> { + let body_len = u32::try_from(body.len()).map_err(|_| EncodeError::LimitExceeded)?; + let header_len = header_len(options.flags()); + let capacity = header_len + .checked_add(body.len()) + .ok_or(EncodeError::LimitExceeded)?; + let mut out = Vec::with_capacity(capacity); + out.extend_from_slice(&MAGIC); + out.push(VERSION); + out.push(options.flags()); + out.extend_from_slice(&0_u16.to_le_bytes()); + out.extend_from_slice(&body_len.to_le_bytes()); + append_hash(&mut out, options.schema_hash); + out.extend_from_slice(body); + Ok(out) +} + +/// Decode a TDBIN frame, validating every reserved field and length. +/// +/// # Errors +/// Returns [`DecodeError`] when the frame header or body length is malformed. +pub fn decode(bytes: &[u8]) -> Result, DecodeError> { + require_len(bytes, BASE_HEADER_LEN)?; + require_magic(bytes)?; + require_version(bytes)?; + let flags = read_u8(bytes, FLAGS_OFFSET)?; + require_known_flags(flags)?; + require_reserved(bytes)?; + let body_len = read_u32(bytes, BODY_LEN_OFFSET)?; + let schema_hash = read_schema_hash(bytes, flags)?; + let body = read_body(bytes, header_len(flags), body_len)?; + Ok(Message { + body, + packed: has_flag(flags, FLAG_PACKED), + schema_hash, + }) +} + +/// Append the optional schema hash to an output buffer. +fn append_hash(out: &mut Vec, schema_hash: Option) { + if let Some(value) = schema_hash { + out.extend_from_slice(&value.to_le_bytes()); + } +} + +/// Return the header length implied by `flags`. +const fn header_len(flags: u8) -> usize { + if has_flag(flags, FLAG_HASH) { + HASH_HEADER_LEN + } else { + BASE_HEADER_LEN + } +} + +/// Return whether `flag` is set in `flags`. +const fn has_flag(flags: u8, flag: u8) -> bool { + flags & flag == flag +} + +/// Require at least `needed` bytes. +fn require_len(bytes: &[u8], needed: usize) -> Result<(), DecodeError> { + bytes + .get(..needed) + .map(|_| ()) + .ok_or(DecodeError::LengthMismatch) +} + +/// Require the frame magic bytes. +fn require_magic(bytes: &[u8]) -> Result<(), DecodeError> { + let got = bytes + .get(..MAGIC.len()) + .ok_or(DecodeError::LengthMismatch)?; + (got == MAGIC.as_slice()) + .then_some(()) + .ok_or(DecodeError::BadMagic) +} + +/// Require the supported frame version. +fn require_version(bytes: &[u8]) -> Result<(), DecodeError> { + match read_u8(bytes, VERSION_OFFSET)? { + VERSION => Ok(()), + version => Err(DecodeError::BadVersion { version }), + } +} + +/// Require that no unknown flag bits are set. +fn require_known_flags(flags: u8) -> Result<(), DecodeError> { + (flags & !KNOWN_FLAGS == 0) + .then_some(()) + .ok_or(DecodeError::ReservedBits) +} + +/// Require the reserved u16 header field to be zero. +fn require_reserved(bytes: &[u8]) -> Result<(), DecodeError> { + (read_u16(bytes, RESERVED_OFFSET)? == 0) + .then_some(()) + .ok_or(DecodeError::ReservedBits) +} + +/// Read the optional schema hash. +fn read_schema_hash(bytes: &[u8], flags: u8) -> Result, DecodeError> { + if has_flag(flags, FLAG_HASH) { + read_u64(bytes, BASE_HEADER_LEN).map(Some) + } else { + Ok(None) + } +} + +/// Read and validate the frame body. +fn read_body(bytes: &[u8], start: usize, body_len: u32) -> Result<&[u8], DecodeError> { + let len = usize::try_from(body_len).map_err(|_| DecodeError::LengthMismatch)?; + let end = start.checked_add(len).ok_or(DecodeError::LengthMismatch)?; + let body = bytes.get(start..end).ok_or(DecodeError::LengthMismatch)?; + (bytes.len() == end) + .then_some(body) + .ok_or(DecodeError::LengthMismatch) +} + +/// Read one byte at `offset`. +fn read_u8(bytes: &[u8], offset: usize) -> Result { + bytes + .get(offset) + .copied() + .ok_or(DecodeError::LengthMismatch) +} + +/// Read a little-endian u16 at `offset`. +fn read_u16(bytes: &[u8], offset: usize) -> Result { + read_fixed::<2>(bytes, offset).map(u16::from_le_bytes) +} + +/// Read a little-endian u32 at `offset`. +fn read_u32(bytes: &[u8], offset: usize) -> Result { + read_fixed::<4>(bytes, offset).map(u32::from_le_bytes) +} + +/// Read a little-endian u64 at `offset`. +fn read_u64(bytes: &[u8], offset: usize) -> Result { + read_fixed::<8>(bytes, offset).map(u64::from_le_bytes) +} + +/// Read a fixed-size byte array at `offset`. +fn read_fixed(bytes: &[u8], offset: usize) -> Result<[u8; N], DecodeError> { + let end = offset.checked_add(N).ok_or(DecodeError::LengthMismatch)?; + let slice = bytes.get(offset..end).ok_or(DecodeError::LengthMismatch)?; + <[u8; N]>::try_from(slice).map_err(|_| DecodeError::LengthMismatch) +} diff --git a/crates/tdbin/src/lib.rs b/crates/tdbin/src/lib.rs index 1adb16c..4ec9b5c 100644 --- a/crates/tdbin/src/lib.rs +++ b/crates/tdbin/src/lib.rs @@ -15,6 +15,7 @@ //! round-trip. Every item references its `[TDBIN-*]` spec ID. mod error; +pub mod frame; mod layout; mod pointer; mod reader; @@ -81,6 +82,28 @@ pub trait TdBin: Struct { fn from_bytes(wire: &[u8]) -> Result { Reader::message(wire) } + + /// Encode to a fresh framed byte vector ([TDBIN-MSG-FRAME]). + /// + /// # Errors + /// Returns [`EncodeError`] if the value or frame exceeds a wire-format limit. + fn to_framed_bytes(&self, schema_hash: Option) -> Result, EncodeError> { + let body = self.to_bytes()?; + frame::encode(&body, frame::Options::new(false, schema_hash)) + } + + /// Decode from framed bytes, safe on arbitrary untrusted input. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed frames, packed bodies, or bad body bytes. + fn from_framed_bytes(wire: &[u8]) -> Result { + let message = frame::decode(wire)?; + if message.is_packed() { + Err(DecodeError::PackedUnsupported) + } else { + Reader::message(message.body()) + } + } } impl TdBin for T {} diff --git a/crates/tdbin/tests/frame.rs b/crates/tdbin/tests/frame.rs new file mode 100644 index 0000000..11c90f2 --- /dev/null +++ b/crates/tdbin/tests/frame.rs @@ -0,0 +1,157 @@ +//! [TDBIN-MSG-FRAME] black-box tests for the public frame envelope API. + +use tdbin::frame::{self, Options}; +use tdbin::{DecodeError, TdBin}; + +/// The codegen-emitted ADT types and their TDBIN codec, under test. +mod generated; + +use generated::{Address, Contact, EmailContact, Person, PhoneContact}; + +/// A boxed error alias so tests can use `?` without `unwrap`. +type TestResult = Result>; + +/// Return a copy of `bytes` with one byte changed. +fn with_byte(bytes: &[u8], offset: usize, value: u8) -> TestResult> { + let mut out = bytes.to_vec(); + let slot = out.get_mut(offset).ok_or("fixture offset out of bounds")?; + *slot = value; + Ok(out) +} + +/// Build a generated `Person` fixture for framed helper tests. +fn person_for_frame(contact: Contact) -> Person { + Person { + name: "Frame Person".to_owned(), + age: 42, + active: true, + score: 1.25, + address: Some(Address { + street: "Frame Street".to_owned(), + zip: 8080, + }), + nickname: None, + contact, + } +} + +/// [TDBIN-MSG-FRAME] An unpacked body without a hash has the 12-byte header. +#[test] +fn tdbin_msg_frame_round_trips_unpacked_body() -> TestResult { + let body = [0xAA, 0xBB, 0xCC, 0xDD, 0, 1, 2, 3]; + let framed = frame::encode(&body, Options::bare())?; + let expected = vec![ + 0x54, 0x44, 0x42, 0x31, 1, 0, 0, 0, 8, 0, 0, 0, 0xAA, 0xBB, 0xCC, 0xDD, 0, 1, 2, 3, + ]; + + assert_eq!(framed, expected, "frame header must be byte-exact"); + let decoded = frame::decode(&framed)?; + assert_eq!(decoded.body(), body, "decoded body must be borrowed intact"); + assert_eq!(decoded.schema_hash(), None, "hash flag must be absent"); + assert!(!decoded.is_packed(), "packed flag must be absent"); + Ok(()) +} + +/// [TDBIN-MSG-FRAME] Packed+hash flags are self-described by the header bytes. +#[test] +fn tdbin_msg_frame_round_trips_packed_hash_metadata() -> TestResult { + let body = [1, 0, 0]; + let framed = frame::encode(&body, Options::new(true, Some(0x0102_0304_0506_0708)))?; + let expected = vec![ + 0x54, 0x44, 0x42, 0x31, 1, 3, 0, 0, 3, 0, 0, 0, 8, 7, 6, 5, 4, 3, 2, 1, 1, 0, 0, + ]; + + assert_eq!(framed, expected, "hash-bearing frame must be byte-exact"); + let decoded = frame::decode(&framed)?; + assert_eq!(decoded.body(), body, "packed body bytes stay packed"); + assert_eq!( + decoded.schema_hash(), + Some(0x0102_0304_0506_0708), + "schema hash must decode little-endian" + ); + assert!( + decoded.is_packed(), + "packed flag must be recovered from bytes" + ); + Ok(()) +} + +/// [TDBIN-MSG-FRAME] Generated ADTs can use the framed `TdBin` helpers. +#[test] +fn tdbin_msg_frame_round_trips_generated_typed_value() -> TestResult { + for person in [ + person_for_frame(Contact::Email(EmailContact { + addr: "frame@example.com".to_owned(), + })), + person_for_frame(Contact::Phone(PhoneContact { + number: 1234, + country: 61, + })), + ] { + let framed = person.to_framed_bytes(Some(0x1122_3344_5566_7788))?; + let decoded_frame = frame::decode(&framed)?; + assert_eq!( + decoded_frame.schema_hash(), + Some(0x1122_3344_5566_7788), + "framed typed encode must preserve schema hash" + ); + assert!(!decoded_frame.is_packed(), "typed framing is unpacked"); + assert_eq!( + Person::from_framed_bytes(&framed)?, + person, + "framed typed value must round-trip" + ); + } + Ok(()) +} + +/// [TDBIN-MSG-FRAME] Typed framed decode rejects packed bodies until unpacking lands. +#[test] +fn tdbin_msg_frame_typed_decode_rejects_packed_body() -> TestResult { + let person = person_for_frame(Contact::Phone(PhoneContact { + number: 777, + country: 1, + })); + let body = person.to_bytes()?; + let framed = frame::encode(&body, Options::new(true, None))?; + + assert_eq!( + Person::from_framed_bytes(&framed), + Err(DecodeError::PackedUnsupported), + "typed decode must not treat packed bodies as bare messages" + ); + Ok(()) +} + +/// [TDBIN-MSG-FRAME] Readers reject invalid header fields and body lengths. +#[test] +fn tdbin_msg_frame_rejects_invalid_headers() -> TestResult { + let framed = frame::encode(&[9, 8, 7], Options::bare())?; + + assert_eq!( + frame::decode(&with_byte(&framed, 0, b'X')?), + Err(DecodeError::BadMagic), + "wrong magic must be rejected" + ); + assert_eq!( + frame::decode(&with_byte(&framed, 4, 2)?), + Err(DecodeError::BadVersion { version: 2 }), + "unknown version must be rejected" + ); + assert_eq!( + frame::decode(&with_byte(&framed, 5, 4)?), + Err(DecodeError::ReservedBits), + "unknown flags must be rejected" + ); + assert_eq!( + frame::decode(&with_byte(&framed, 6, 1)?), + Err(DecodeError::ReservedBits), + "reserved field must be zero" + ); + assert_eq!( + frame::decode(&with_byte(&framed, 8, 4)?), + Err(DecodeError::LengthMismatch), + "body_len must match the available body bytes exactly" + ); + Ok(()) +} diff --git a/crates/tdbin/tests/fuzz_decode.rs b/crates/tdbin/tests/fuzz_decode.rs new file mode 100644 index 0000000..b383123 --- /dev/null +++ b/crates/tdbin/tests/fuzz_decode.rs @@ -0,0 +1,368 @@ +//! [TDBIN-TEST-FUZZ] Decode-robustness lane: a large, deterministic adversarial +//! corpus driven through the PUBLIC codec API (`TdBin::from_bytes`), proving the +//! decoder is total and safe on arbitrary untrusted bytes ([TDBIN-RS-NOPANIC], +//! [TDBIN-SAFE-DEPTH], [TDBIN-SAFE-UTF8], [TDBIN-UNION-UNKNOWN]). +//! +//! This lane is intentionally DISJOINT from `roundtrip.rs`: that file pins the +//! fixed `BadLength`/`NullRoot`/`ReservedPointerKind`/`PointerKindMismatch` byte +//! patterns; here we cover what it does not — randomized mutation under the +//! decode-determinism and canonical-fixpoint invariants, plus the depth cap, the +//! unknown-union ordinal, and the invalid-UTF-8 path. Every type and its codec is +//! hand-written against the STABLE public `Struct` trait, so this lane never +//! depends on generated fixtures or the wire-format additions in flight. +//! +//! Floating-point scalars are deliberately excluded from the fuzzed types: a +//! random `f64` is frequently `NaN`, and `NaN != NaN` would make the value-based +//! fixpoint assertion non-reflexive. `f64` fidelity is covered by `roundtrip.rs`. + +use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; + +/// Boxed-error alias so tests use `?` without `unwrap`/`expect`. +type TestResult = Result<(), Box>; + +/// Fuzz iterations per shape (deterministic; each is cheap). +const ROUNDS: usize = 512; +/// Fixed PRNG seed — the corpus is fully reproducible ([TDBIN-TEST-FUZZ]). +const SEED: u64 = 0x853c_49e6_748f_ea9b; + +// ── Hand-written `Struct` shapes, one per decode path ── + +/// A pointerless record of two scalar words (data-section decode). +#[derive(Debug, Clone, PartialEq)] +struct Flat { + /// Signed-integer scalar slot. + count: i64, + /// Boolean scalar slot. + flag: bool, +} + +impl Struct for Flat { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.count))?; + w.scalar(at, 1, tdbin::scalar::bool_bits(self.flag))?; + Ok(()) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let count = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let flag = tdbin::scalar::bool_from(r.scalar(at, 1)?); + Ok(Self { count, flag }) + } +} + +/// A single required string (pointer-section decode + UTF-8 validation). +#[derive(Debug, Clone, PartialEq)] +struct WithString { + /// Required UTF-8 string field. + text: String, +} + +impl Struct for WithString { + const DATA_WORDS: u16 = 0; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.text))?; + Ok(()) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let text = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + Ok(Self { text }) + } +} + +/// A one-scalar leaf used as a union payload. +#[derive(Debug, Clone, PartialEq)] +struct Leaf { + /// Scalar payload. + value: i64, +} + +impl Struct for Leaf { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.value))?; + Ok(()) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + Ok(Self { + value: tdbin::scalar::i64_from(r.scalar(at, 0)?), + }) + } +} + +/// A tagged union: discriminant word plus a payload child pointer. +#[derive(Debug, Clone, PartialEq)] +enum Choice { + /// Ordinal 0. + First(Leaf), + /// Ordinal 1. + Second(Leaf), +} + +impl Struct for Choice { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + match self { + Self::First(payload) => { + w.scalar(at, 0, 0)?; + w.child(at, Self::DATA_WORDS, 0, Some(payload)) + } + Self::Second(payload) => { + w.scalar(at, 0, 1)?; + w.child(at, Self::DATA_WORDS, 0, Some(payload)) + } + } + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::First( + r.child::(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + 1 => Ok(Self::Second( + r.child::(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + ordinal => Err(DecodeError::UnknownVariant { ordinal }), + } + } +} + +/// A self-referential struct used to build nesting past the decoder depth cap. +#[derive(Debug, Clone, PartialEq)] +struct Deep { + /// Optional next link. + next: Option>, +} + +impl Struct for Deep { + const DATA_WORDS: u16 = 0; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.child(at, Self::DATA_WORDS, 0, self.next.as_deref())?; + Ok(()) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let next = r.child::(at, Self::DATA_WORDS, 0)?.map(Box::new); + Ok(Self { next }) + } +} + +// ── Deterministic corpus generation ── + +/// A minimal LCG PRNG (deterministic, wrapping — no timing or OS entropy). +struct Lcg { + /// Current internal state. + state: u64, +} + +impl Lcg { + /// Seed the generator. + fn new(seed: u64) -> Self { + Self { state: seed } + } + + /// Advance and return the next pseudo-random word. + fn next(&mut self) -> u64 { + self.state = self + .state + .wrapping_mul(6_364_136_223_846_793_005) + .wrapping_add(1_442_695_040_888_963_407); + self.state + } +} + +/// Bit-flip roughly one in eight bytes of `base`. +fn flip_bits(lcg: &mut Lcg, base: &[u8]) -> Vec { + let mut out = base.to_vec(); + for byte in &mut out { + if lcg.next() & 0x07 == 0 { + if let Some(&mask) = lcg.next().to_le_bytes().first() { + *byte ^= mask; + } + } + } + out +} + +/// Keep a random prefix of whole words (may be empty → `BadLength` path). +fn truncate_words(lcg: &mut Lcg, base: &[u8]) -> Vec { + let keep = usize::try_from(lcg.next() & 0x0F).unwrap_or(0); + base.chunks(8).take(keep).flatten().copied().collect() +} + +/// Append a random number of whole random words. +fn append_words(lcg: &mut Lcg, base: &[u8]) -> Vec { + let extra = usize::try_from(lcg.next() & 0x07).unwrap_or(0); + let mut out = base.to_vec(); + for _ in 0..extra { + out.extend_from_slice(&lcg.next().to_le_bytes()); + } + out +} + +/// Append 1–7 random bytes, breaking word alignment (`BadLength` path). +fn append_tail_bytes(lcg: &mut Lcg, base: &[u8]) -> Vec { + let mut out = base.to_vec(); + let take = usize::try_from((lcg.next() & 0x07) | 0x01).unwrap_or(1); + let word = lcg.next().to_le_bytes(); + out.extend_from_slice(word.get(..take).unwrap_or(&word)); + out +} + +/// Produce one adversarial mutation of `base`. +fn mutate(lcg: &mut Lcg, base: &[u8]) -> Vec { + match lcg.next() & 0x03 { + 0 => flip_bits(lcg, base), + 1 => truncate_words(lcg, base), + 2 => append_words(lcg, base), + _ => append_tail_bytes(lcg, base), + } +} + +/// A buffer of 0–15 fully random whole words. +fn random_words(lcg: &mut Lcg) -> Vec { + let words = usize::try_from(lcg.next() & 0x0F).unwrap_or(0); + let mut out = Vec::new(); + for _ in 0..words { + out.extend_from_slice(&lcg.next().to_le_bytes()); + } + out +} + +/// A `Deep` chain `n` links long (root plus `n` nested children). +fn deep_chain(n: usize) -> Deep { + let mut node = Deep { next: None }; + for _ in 0..n { + node = Deep { + next: Some(Box::new(node)), + }; + } + node +} + +/// First index at which `needle` occurs in `haystack`, if any. +fn find_subslice(haystack: &[u8], needle: &[u8]) -> Option { + haystack.windows(needle.len()).position(|w| w == needle) +} + +// ── Invariants ── + +/// Decode `buf`, asserting decode determinism and — when it decodes — the +/// canonical re-encode fixpoint: `from_bytes(x) = Ok(v)` implies re-encoding `v` +/// and decoding again yields exactly `v` ([TDBIN-ENC-CANON], [TDBIN-RS-NOPANIC]). +fn exercise(buf: &[u8]) -> TestResult +where + T: TdBin + Clone + PartialEq + core::fmt::Debug, +{ + let decoded = T::from_bytes(buf); + assert_eq!( + decoded, + T::from_bytes(buf), + "decode of identical bytes must be deterministic" + ); + if let Ok(value) = &decoded { + let reencoded = value.to_bytes()?; + let expected: Result<&T, &DecodeError> = Ok(value); + assert_eq!( + T::from_bytes(&reencoded).as_ref(), + expected, + "decode must be a fixpoint under canonical re-encode" + ); + } + Ok(()) +} + +/// Run `ROUNDS` mutation and `ROUNDS` random inputs of `T` through `exercise`. +fn fuzz(base: &[u8], lcg: &mut Lcg) -> TestResult +where + T: TdBin + Clone + PartialEq + core::fmt::Debug, +{ + for _ in 0..ROUNDS { + exercise::(&mutate(lcg, base))?; + exercise::(&random_words(lcg))?; + } + Ok(()) +} + +// ── Tests ── + +/// [TDBIN-TEST-FUZZ] Across scalar, string, union, and nested shapes, decode is +/// total (never panics), deterministic, and a canonical re-encode fixpoint over +/// a large mutated + random corpus. +#[test] +fn decode_is_total_deterministic_and_fixpoint_under_fuzz() -> TestResult { + let mut lcg = Lcg::new(SEED); + fuzz::(&Flat { count: -7, flag: true }.to_bytes()?, &mut lcg)?; + fuzz::( + &WithString { + text: "hello, tdbin".to_owned(), + } + .to_bytes()?, + &mut lcg, + )?; + fuzz::(&Choice::Second(Leaf { value: 42 }).to_bytes()?, &mut lcg)?; + fuzz::(&deep_chain(8).to_bytes()?, &mut lcg)?; + Ok(()) +} + +/// [TDBIN-SAFE-DEPTH] The encoder has no depth cap, but decoding a chain nested +/// past `MAX_DEPTH` (64) must return `DepthExceeded`, never overflow the stack. +#[test] +fn depth_cap_rejects_overdeep_nesting() -> TestResult { + let bytes = deep_chain(128).to_bytes()?; + assert_eq!(Deep::from_bytes(&bytes), Err(DecodeError::DepthExceeded)); + Ok(()) +} + +/// [TDBIN-UNION-UNKNOWN] A discriminant with no matching variant is rejected as +/// `UnknownVariant`, carrying the offending ordinal — not silently accepted. +#[test] +fn unknown_union_ordinal_is_rejected() -> TestResult { + let bytes = Choice::First(Leaf { value: 1 }).to_bytes()?; + let mut evil = bytes.clone(); + // The union discriminant is root data word 0 (bytes 8..16 in canonical v0). + evil.get_mut(8..16) + .ok_or("message too short for a discriminant")? + .copy_from_slice(&9u64.to_le_bytes()); + match Choice::from_bytes(&evil) { + Err(DecodeError::UnknownVariant { ordinal: 9 }) => Ok(()), + other => Err(format!("expected UnknownVariant{{ordinal:9}}, got {other:?}").into()), + } +} + +/// [TDBIN-SAFE-UTF8] A string field carrying a non-UTF-8 byte is rejected as +/// `InvalidUtf8`, never surfaced as a lossy or panicking decode. +#[test] +fn invalid_utf8_string_is_rejected() -> TestResult { + let marker = "MARKERvalue"; + let bytes = WithString { + text: marker.to_owned(), + } + .to_bytes()?; + let mut evil = bytes.clone(); + let at = find_subslice(&evil, marker.as_bytes()).ok_or("marker not found on the wire")?; + // 0xFF is never a valid UTF-8 byte; corrupt the leading byte of the payload. + let byte = evil.get_mut(at).ok_or("payload index past end")?; + *byte = 0xFF; + assert_eq!( + WithString::from_bytes(&evil), + Err(DecodeError::InvalidUtf8) + ); + Ok(()) +} diff --git a/crates/tdbin/tests/generated/mod.rs b/crates/tdbin/tests/generated/mod.rs index 45cd492..31f3f1c 100644 --- a/crates/tdbin/tests/generated/mod.rs +++ b/crates/tdbin/tests/generated/mod.rs @@ -1,9 +1,10 @@ //! [TDBIN-TEST-ROUNDTRIP] typeDiagram ADT + TDBIN codec, GENERATED by //! `packages/typediagram/src/converters/rust-tdbin.ts` (`generateRustModule`) -//! from a fixed Person-shaped `.td`. `roundtrip.rs` exercises these types so the -//! end-to-end proof — typeDiagram ADT -> binary -> typeDiagram ADT — runs under -//! `cargo test`. The `rust-tdbin.test.ts` vitest suite pins the emitted text and -//! fails if this file drifts from codegen; regenerate rather than hand-editing. +//! from a fixed Person-shaped `.td`. `roundtrip.rs`, `frame.rs` and `golden.rs` +//! exercise these types so the end-to-end proof — typeDiagram ADT -> binary -> +//! typeDiagram ADT — runs under `cargo test`. The `rust-tdbin.test.ts` vitest +//! suite pins the emitted text and fails if this file drifts from codegen; +//! regenerate rather than hand-editing. // <<>> /// The `Address` record. diff --git a/crates/tdbin/tests/generated_opt/mod.rs b/crates/tdbin/tests/generated_opt/mod.rs new file mode 100644 index 0000000..d170448 --- /dev/null +++ b/crates/tdbin/tests/generated_opt/mod.rs @@ -0,0 +1,56 @@ +//! [TDBIN-PRIM-OPTION] GENERATED `Option` fixture (presence + value +//! slots), emitted by `packages/typediagram/src/converters/rust-tdbin.ts` +//! (`generateRustModule`). Included only by `roundtrip.rs`; kept separate from +//! the shared Person fixture so the framing/golden test binaries do not carry an +//! unused type (`-D dead-code`). Regenerate rather than hand-editing. + +// <<>> +/// The `Measurement` record. +#[derive(Debug, Clone, PartialEq)] +pub struct Measurement { + /// The `label` field. + pub label: String, + /// The `count` field. + pub count: Option, + /// The `flagged` field. + pub flagged: Option, + /// The `ratio` field. + pub ratio: Option, +} + +impl tdbin::Struct for Measurement { + const DATA_WORDS: u16 = 6; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.label))?; + w.scalar(at, 0, u64::from(self.count.is_some()))?; + w.scalar(at, 1, self.count.map_or(0, tdbin::scalar::i64_bits))?; + w.scalar(at, 2, u64::from(self.flagged.is_some()))?; + w.scalar(at, 3, self.flagged.map_or(0, tdbin::scalar::bool_bits))?; + w.scalar(at, 4, u64::from(self.ratio.is_some()))?; + w.scalar(at, 5, self.ratio.map_or(0, tdbin::scalar::f64_bits))?; + Ok(()) + } + + fn read_struct(r: &tdbin::Reader<'_>, at: usize) -> Result { + let label = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(tdbin::DecodeError::UnexpectedNull)?; + let count_present = r.scalar(at, 0)? != 0; + let count_value = tdbin::scalar::i64_from(r.scalar(at, 1)?); + let count = count_present.then_some(count_value); + let flagged_present = r.scalar(at, 2)? != 0; + let flagged_value = tdbin::scalar::bool_from(r.scalar(at, 3)?); + let flagged = flagged_present.then_some(flagged_value); + let ratio_present = r.scalar(at, 4)? != 0; + let ratio_value = tdbin::scalar::f64_from(r.scalar(at, 5)?); + let ratio = ratio_present.then_some(ratio_value); + Ok(Self { + label, + count, + flagged, + ratio, + }) + } +} diff --git a/crates/tdbin/tests/roundtrip.rs b/crates/tdbin/tests/roundtrip.rs index 1683daa..a50176c 100644 --- a/crates/tdbin/tests/roundtrip.rs +++ b/crates/tdbin/tests/roundtrip.rs @@ -8,8 +8,12 @@ /// The codegen-emitted ADT types and their TDBIN codec, under test. mod generated; +/// The codegen-emitted `Option` fixture (separate module so the framing +/// and golden test binaries do not carry an unused type under `-D dead-code`). +mod generated_opt; use generated::{Address, Contact, EmailContact, Person, PhoneContact}; +use generated_opt::Measurement; use tdbin::{DecodeError, TdBin}; /// A boxed error alias so tests can use `?` without `unwrap`. @@ -51,6 +55,26 @@ fn person_without_address() -> Person { } } +/// A measurement with every `Option` present. +fn measurement_full() -> Measurement { + Measurement { + label: "temp".to_owned(), + count: Some(42), + flagged: Some(true), + ratio: Some(0.5), + } +} + +/// A measurement with every `Option` absent (`None` encodes as zeros). +fn measurement_empty() -> Measurement { + Measurement { + label: "empty".to_owned(), + count: None, + flagged: None, + ratio: None, + } +} + // ── Tests ── /// typed object -> binary -> typed object is the identity, for both fixtures. @@ -139,3 +163,33 @@ fn adversarial_inputs_return_typed_errors() -> TestResult { other => Err(format!("expected a bounds error on truncation, got {other:?}").into()), } } + +/// [TDBIN-PRIM-OPTION] `Option` presence flags round-trip: `Some` keeps +/// the value, `None` decodes back to `None`, both directions stay byte-identical, +/// and present/absent never collide on the wire. +#[test] +fn option_scalar_presence_round_trips() -> TestResult { + for measurement in [measurement_full(), measurement_empty()] { + let bytes = measurement.to_bytes()?; + let decoded = Measurement::from_bytes(&bytes)?; + assert_eq!( + decoded, measurement, + "Option must round-trip exactly" + ); + assert_eq!( + decoded.to_bytes()?, + bytes, + "re-encode must be byte-identical" + ); + } + let empty = Measurement::from_bytes(&measurement_empty().to_bytes()?)?; + assert_eq!(empty.count, None, "absent Int decodes to None"); + assert_eq!(empty.flagged, None, "absent Bool decodes to None"); + assert_eq!(empty.ratio, None, "absent Float decodes to None"); + assert_ne!( + measurement_full().to_bytes()?, + measurement_empty().to_bytes()?, + "present and absent must not collide" + ); + Ok(()) +} diff --git a/docs/plans/tdbin-implementation-plan.md b/docs/plans/tdbin-implementation-plan.md index af922e3..ffe30c2 100644 --- a/docs/plans/tdbin-implementation-plan.md +++ b/docs/plans/tdbin-implementation-plan.md @@ -55,7 +55,7 @@ v0 wire subset (documented in-crate): one word per scalar (bool/int/float), Stri - [ ] Semantic scalars: `DateTime`/`Uuid`/`Decimal` byte layouts `[TDBIN-PRIM-MAP]`; full `Option` matrix incl. `Option` presence bit `[TDBIN-PRIM-OPTION]` - [ ] `Option` must NOT alias the null pointer (review finding `empty-struct-null-collision`) — reserve a non-zero marker or forbid zero-size struct pointers - [ ] Cap'n-Proto word packing `[TDBIN-PACK-WORD]` `[TDBIN-PACK-RUNS]`, bounds-checked, output-capped -- [ ] Framing `[TDBIN-MSG-FRAME]`: magic/version/flags/body_len; **decode must know framing/packed from the bytes** (review finding `decode-framing-packed-ambiguity`) — self-describing header, not a decode option +- [x] Framing `[TDBIN-MSG-FRAME]`: magic/version/flags/body_len; **decode must know framing/packed from the bytes** (review finding `decode-framing-packed-ambiguity`) — self-describing header, not a decode option - [ ] Golden vectors `[TDBIN-TEST-GOLDEN]` byte-exact hex; extend round-trip/evil corpora with packed + framed variants ## Phase 3 — Evolution + safety hardening (resolve review BLOCKERS) diff --git a/packages/typediagram/src/converters/rust-tdbin.ts b/packages/typediagram/src/converters/rust-tdbin.ts index 0f2aea6..975c1ee 100644 --- a/packages/typediagram/src/converters/rust-tdbin.ts +++ b/packages/typediagram/src/converters/rust-tdbin.ts @@ -30,6 +30,7 @@ const SCALARS: Record = { /** How a record field is laid out on the wire. */ type FieldPlan = | { kind: "scalar"; slot: number; bits: string; from: string } + | { kind: "optScalar"; presenceSlot: number; valueSlot: number; bits: string; from: string } | { kind: "string"; slot: number; optional: boolean } | { kind: "bytes"; slot: number; optional: boolean } | { kind: "child"; slot: number; optional: boolean; rustType: string }; @@ -67,14 +68,37 @@ const pointerInner = (t: ResolvedTypeRef, slot: number, optional: boolean): Fiel ? { kind: "child", slot, optional, rustType: mapTdToRs(t) } : null; -/** Classify one record field into a scalar or pointer plan. */ -const classifyField = (t: ResolvedTypeRef, dataSlot: number, ptrSlot: number): { plan: FieldPlan; dataSlot: number; ptrSlot: number } | null => { - const scalar = t.args.length === 0 && t.resolution.kind === "primitive" ? SCALARS[t.name] : undefined; +/** A classified field plan plus the advanced data/pointer cursors. */ +type Placed = { plan: FieldPlan; dataSlot: number; ptrSlot: number } | null; + +/** The one-word scalar codec for a bare primitive (Bool/Int/Float), else undefined. */ +const scalarOf = (t: ResolvedTypeRef): { bits: string; from: string } | undefined => + t.args.length === 0 && t.resolution.kind === "primitive" ? SCALARS[t.name] : undefined; + +/** Classify an `Option` field: a scalar inner takes a presence slot + a value + * slot ([TDBIN-PRIM-OPTION], word-granular in v0 until bit-packing collapses the + * flag to 1 bit); a pointer inner takes one pointer slot with null = `None`. */ +const classifyOption = (inner: ResolvedTypeRef, dataSlot: number, ptrSlot: number): Placed => { + const innerScalar = scalarOf(inner); + if (innerScalar !== undefined) { + const plan: FieldPlan = { kind: "optScalar", presenceSlot: dataSlot, valueSlot: dataSlot + 1, bits: innerScalar.bits, from: innerScalar.from }; + return { plan, dataSlot: dataSlot + 2, ptrSlot }; + } + const plan = pointerInner(inner, ptrSlot, true); + return plan === null ? null : { plan, dataSlot, ptrSlot: ptrSlot + 1 }; +}; + +/** Classify one record field into a scalar, `Option`, or pointer plan. */ +const classifyField = (t: ResolvedTypeRef, dataSlot: number, ptrSlot: number): Placed => { + const scalar = scalarOf(t); if (scalar !== undefined) { return { plan: { kind: "scalar", slot: dataSlot, bits: scalar.bits, from: scalar.from }, dataSlot: dataSlot + 1, ptrSlot }; } const optionInner = t.name === "Option" && t.args.length === 1 ? t.args[0] : undefined; - const plan = optionInner !== undefined ? pointerInner(optionInner, ptrSlot, true) : pointerInner(t, ptrSlot, false); + if (optionInner !== undefined) { + return classifyOption(optionInner, dataSlot, ptrSlot); + } + const plan = pointerInner(t, ptrSlot, false); return plan === null ? null : { plan, dataSlot, ptrSlot: ptrSlot + 1 }; }; @@ -129,6 +153,11 @@ const writeField = (name: string, p: FieldPlan): string => { switch (p.kind) { case "scalar": return ` w.scalar(at, ${p.slot}, tdbin::scalar::${p.bits}(${self}))?;`; + case "optScalar": + return [ + ` w.scalar(at, ${p.presenceSlot}, u64::from(${self}.is_some()))?;`, + ` w.scalar(at, ${p.valueSlot}, ${self}.map_or(0, tdbin::scalar::${p.bits}))?;`, + ].join("\n"); case "string": return ` w.string(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; case "bytes": @@ -146,6 +175,12 @@ const readField = (name: string, p: FieldPlan): string => { switch (p.kind) { case "scalar": return ` let ${name} = tdbin::scalar::${p.from}(r.scalar(at, ${p.slot})?);`; + case "optScalar": + return [ + ` let ${name}_present = r.scalar(at, ${p.presenceSlot})? != 0;`, + ` let ${name}_value = tdbin::scalar::${p.from}(r.scalar(at, ${p.valueSlot})?);`, + ` let ${name} = ${name}_present.then_some(${name}_value);`, + ].join("\n"); case "string": return ` let ${name} = r.string(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; case "bytes": diff --git a/packages/typediagram/test/converters/rust-tdbin.test.ts b/packages/typediagram/test/converters/rust-tdbin.test.ts index 5502bfb..425758d 100644 --- a/packages/typediagram/test/converters/rust-tdbin.test.ts +++ b/packages/typediagram/test/converters/rust-tdbin.test.ts @@ -42,6 +42,14 @@ type Person { contact: Contact }`; +// The Option fixture committed to crates/tdbin/tests/generated_opt/mod.rs. +const MEASUREMENT_TD = `type Measurement { + label: String + count: Option + flagged: Option + ratio: Option +}`; + describe("[CONV-RUST-TDBIN] record + union codec structure", () => { it("bakes DATA_WORDS/PTR_WORDS and slot-addressed scalar/pointer field codecs", () => { const code = codecFor(PERSON_TD); @@ -105,6 +113,25 @@ describe("[CONV-RUST-TDBIN] record + union codec structure", () => { }); }); +describe("[CONV-RUST-TDBIN] Option presence + value slots", () => { + it("allocates a presence slot then a value slot per Option ([TDBIN-PRIM-OPTION])", () => { + const code = codecFor(MEASUREMENT_TD); + // label (String) is the sole pointer; three Option fill 6 data words. + expect(code).toMatch(/impl tdbin::Struct for Measurement \{\n const DATA_WORDS: u16 = 6;\n const PTR_WORDS: u16 = 1;/); + // Write: presence = is_some(), value = map_or(0, codec) so None writes zeros. + expect(code).toContain("w.scalar(at, 0, u64::from(self.count.is_some()))?;"); + expect(code).toContain("w.scalar(at, 1, self.count.map_or(0, tdbin::scalar::i64_bits))?;"); + expect(code).toContain("w.scalar(at, 2, u64::from(self.flagged.is_some()))?;"); + expect(code).toContain("w.scalar(at, 3, self.flagged.map_or(0, tdbin::scalar::bool_bits))?;"); + expect(code).toContain("w.scalar(at, 5, self.ratio.map_or(0, tdbin::scalar::f64_bits))?;"); + // Read: the presence flag gates then_some over the decoded value. + expect(code).toContain("let count_present = r.scalar(at, 0)? != 0;"); + expect(code).toContain("let count_value = tdbin::scalar::i64_from(r.scalar(at, 1)?);"); + expect(code).toContain("let count = count_present.then_some(count_value);"); + expect(code).toContain("let ratio = ratio_present.then_some(ratio_value);"); + }); +}); + describe("[CONV-RUST-TDBIN] generateRustModule assembles a deny-all-clean module", () => { it("emits doc comments, derives, aliases, and the codec together", () => { const mod = unwrap(generateRustModule(modelFor(`alias Id = Int\ntype Tag {\n label: String\n}`))); @@ -124,6 +151,12 @@ describe("[CONV-RUST-TDBIN] fails loudly on unsupported shapes (no placeholders) expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type"); }); + it("rejects an Option over an unsupported inner type", () => { + const r = emitRustCodec(modelFor(`type R {\n x: Option>\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type"); + }); + it("rejects a generic decl that was not monomorphized", () => { const r = emitRustCodec(modelFor(`type Box {\n value: T\n}`)); expect(r.ok).toBe(false); @@ -148,19 +181,24 @@ describe("[CONV-RUST-TDBIN] fails loudly on unsupported shapes (no placeholders) }); }); -describe("[CONV-RUST-TDBIN] drift guard vs the committed crate fixture", () => { - it("generateRustModule reproduces crates/tdbin/tests/generated/mod.rs (modulo rustfmt)", () => { - const generated = unwrap(generateRustModule(modelFor(PERSON_TD))); - const committed = readFileSync( - fileURLToPath(new URL("../../../../crates/tdbin/tests/generated/mod.rs", import.meta.url)), - "utf8" - ); +describe("[CONV-RUST-TDBIN] drift guard vs the committed crate fixtures", () => { + // rustfmt only rewraps and adds trailing commas; compare token streams with + // whitespace and trailing commas normalized away. + const norm = (s: string): string => s.replace(/\s+/g, "").replace(/,(?=[)}\]])/g, ""); + const expectReproduces = (td: string, relPath: string): void => { + const generated = unwrap(generateRustModule(modelFor(td))); + const committed = readFileSync(fileURLToPath(new URL(relPath, import.meta.url)), "utf8"); const marker = committed.indexOf("// << s.replace(/\s+/g, "").replace(/,(?=[)}\]])/g, ""); expect(norm(body)).toBe(norm(generated)); + }; + + it("reproduces generated/mod.rs (Person fixture)", () => { + expectReproduces(PERSON_TD, "../../../../crates/tdbin/tests/generated/mod.rs"); + }); + + it("reproduces generated_opt/mod.rs (Option Measurement fixture)", () => { + expectReproduces(MEASUREMENT_TD, "../../../../crates/tdbin/tests/generated_opt/mod.rs"); }); }); From bbad58f53029cd90970709cfe721ebb2dbce54e6 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Fri, 10 Jul 2026 02:31:33 +1000 Subject: [PATCH 13/16] Complete TDBIN implementation gate --- Cargo.lock | 486 +++++++++++++++ Makefile | 16 + coverage-thresholds.json | 18 +- crates/tdbin/Cargo.toml | 16 + crates/tdbin/benches/gate.rs | 143 +++++ crates/tdbin/examples/bench.rs | 131 ++++ crates/tdbin/fuzz/.gitignore | 3 + crates/tdbin/fuzz/Cargo.lock | 94 +++ crates/tdbin/fuzz/Cargo.toml | 21 + crates/tdbin/fuzz/fuzz_targets/decode.rs | 72 +++ crates/tdbin/src/error.rs | 9 +- crates/tdbin/src/frame.rs | 10 + crates/tdbin/src/lib.rs | 14 +- crates/tdbin/src/pack.rs | 321 ++++++++++ crates/tdbin/src/pointer.rs | 10 +- crates/tdbin/src/reader.rs | 501 ++++++++++++++- crates/tdbin/src/reflect.rs | 251 ++++++++ crates/tdbin/src/scalar.rs | 20 + crates/tdbin/src/writer.rs | 331 +++++++++- crates/tdbin/tests/evolution.rs | 252 ++++++++ crates/tdbin/tests/frame.rs | 10 +- crates/tdbin/tests/fuzz_decode.rs | 411 ++++--------- crates/tdbin/tests/generated/mod.rs | 4 +- crates/tdbin/tests/golden.rs | 175 ++++++ crates/tdbin/tests/lists.rs | 262 ++++++++ crates/tdbin/tests/pack.rs | 108 ++++ crates/tdbin/tests/packing.rs | 128 ++++ crates/tdbin/tests/reflect.rs | 144 +++++ crates/tdbin/tests/size_gate.rs | 100 +++ crates/tdbin/tests/support/bench_corpus.rs | 485 +++++++++++++++ docs/benchmarks/tdbin-corpus.proto | 105 ++++ docs/benchmarks/tdbin-corpus.td | 97 +++ docs/plans/tdbin-implementation-plan.md | 53 +- docs/reports/tdbin-bench-report.md | 51 ++ docs/research/binary-format-research.md | 246 ++++---- docs/specs/tdbin-future-columnar.md | 28 + docs/specs/tdbin-future-reader.md | 27 + docs/specs/tdbin-future-typescript.md | 25 + docs/specs/tdbin-future-width-types.md | 26 + docs/specs/tdbin-rust-api.md | 14 +- docs/specs/tdbin-wire-format.md | 199 +++--- docs/specs/tdrpc.md | 31 + packages/cli/src/args.ts | 26 +- packages/cli/src/cli.ts | 70 ++- packages/cli/src/io.ts | 8 +- packages/cli/test/args.test.ts | 18 + packages/cli/test/cli.e2e.test.ts | 66 ++ packages/cli/test/io.test.ts | 23 + packages/cli/tsconfig.build.json | 1 + packages/typediagram/package.json | 4 + packages/typediagram/src/converters/csharp.ts | 4 +- packages/typediagram/src/converters/dart.ts | 4 +- .../src/converters/parse-typeref.ts | 9 + .../typediagram/src/converters/protobuf.ts | 6 +- packages/typediagram/src/converters/python.ts | 6 +- .../typediagram/src/converters/rust-tdbin.ts | 578 ++++++++++++++++-- packages/typediagram/src/converters/rust.ts | 18 +- packages/typediagram/src/layout/elk.ts | 6 +- .../typediagram/test/converters/go.test.ts | 73 +++ .../test/converters/rust-tdbin.test.ts | 194 +++++- .../test/converters/typescript.test.ts | 31 + packages/typediagram/test/elk-project.test.ts | 76 +++ packages/typediagram/test/index.test.ts | 19 +- packages/typediagram/test/layout.test.ts | 6 + packages/typediagram/test/render.test.ts | 59 ++ .../vscode/test/export-pdf-physical.test.ts | 4 +- packages/vscode/test/export-pdf.test.ts | 18 +- packages/vscode/test/extension.test.ts | 14 +- .../vscode/test/markdown-it-plugin.test.ts | 6 +- packages/vscode/test/vscode-mock.ts | 2 +- packages/vscode/tsconfig.build.json | 1 + packages/web/e2e/playground.spec.ts | 2 +- 72 files changed, 6138 insertions(+), 662 deletions(-) create mode 100644 crates/tdbin/benches/gate.rs create mode 100644 crates/tdbin/examples/bench.rs create mode 100644 crates/tdbin/fuzz/.gitignore create mode 100644 crates/tdbin/fuzz/Cargo.lock create mode 100644 crates/tdbin/fuzz/Cargo.toml create mode 100644 crates/tdbin/fuzz/fuzz_targets/decode.rs create mode 100644 crates/tdbin/src/pack.rs create mode 100644 crates/tdbin/src/reflect.rs create mode 100644 crates/tdbin/tests/evolution.rs create mode 100644 crates/tdbin/tests/golden.rs create mode 100644 crates/tdbin/tests/lists.rs create mode 100644 crates/tdbin/tests/pack.rs create mode 100644 crates/tdbin/tests/packing.rs create mode 100644 crates/tdbin/tests/reflect.rs create mode 100644 crates/tdbin/tests/size_gate.rs create mode 100644 crates/tdbin/tests/support/bench_corpus.rs create mode 100644 docs/benchmarks/tdbin-corpus.proto 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Formatting (write)..." npx prettier --write . + @echo "==> Formatting Rust (cargo fmt)..." + cargo fmt ## clean: Remove all build artifacts from every package (dist, per-package ## coverage, root coverage, eleventy + typedoc output). @@ -109,6 +115,8 @@ _coverage_check: _fmt_check: @echo "==> Format check (read-only)..." npx prettier --check . + @echo "==> Rust format check (read-only)..." + cargo fmt --check _eslint: @echo "==> ESLint..." @@ -118,6 +126,14 @@ _banned_deps: @echo "==> Banned-deps check..." npm run check-banned-deps --workspace=packages/typediagram +_cargo_test: + @echo "==> Rust tests (cargo test --workspace, fail-fast)..." + cargo test --workspace + +_cargo_clippy: + @echo "==> Rust clippy (workspace, all targets, deny-all)..." + cargo clippy --workspace --all-targets -- -D warnings + _bundle_size: @echo "==> Bundle-size budget..." npm run bundle-size --workspace=packages/typediagram diff --git a/coverage-thresholds.json b/coverage-thresholds.json index 6e1a5b6..f616e06 100644 --- a/coverage-thresholds.json +++ b/coverage-thresholds.json @@ -4,22 +4,22 @@ "default_threshold": 90, "projects": { "packages/typediagram": { - "statements": 95, - "branches": 90.89, - "functions": 98.58, - "lines": 95 + "statements": 96.12, + "branches": 91.05, + "functions": 98.68, + "lines": 96.01 }, "packages/cli": { - "statements": 96.71, - "branches": 97.16, + "statements": 99, + "branches": 98.37, "functions": 99, - "lines": 96.71 + "lines": 99 }, "packages/web": { - "statements": 97.64864864864865, + "statements": 97.65996649916248, "branches": 95.86, "functions": 97.93617021276596, - "lines": 97.62306368330465 + "lines": 97.63481228668942 }, "packages/vscode": { "statements": 99, diff --git a/crates/tdbin/Cargo.toml b/crates/tdbin/Cargo.toml index 68c508c..465428a 100644 --- a/crates/tdbin/Cargo.toml +++ b/crates/tdbin/Cargo.toml @@ -12,3 +12,19 @@ publish = false [lints] workspace = true + +# prost is the COMPETITOR baseline for the honest size/speed benchmark, pulled in +# only for the `size_gate` test and the `bench` example. It is a DEV-dependency so +# the shipped runtime stays zero-dep ([TDBIN-BENCH-CORPUS], [TDBIN-BENCH-GATE]). +[dev-dependencies] +criterion = { version = "0.8.2", default-features = false, features = ["cargo_bench_support"] } +prost = "0.14" + +# The TDBIN-vs-Protobuf speed benchmark, run via `cargo run --release --example bench`. +[[example]] +name = "bench" + +# The statistical TDBIN-vs-Protobuf benchmark, run via `cargo bench -p tdbin --bench gate`. +[[bench]] +name = "gate" +harness = false diff --git a/crates/tdbin/benches/gate.rs b/crates/tdbin/benches/gate.rs new file mode 100644 index 0000000..c862651 --- /dev/null +++ b/crates/tdbin/benches/gate.rs @@ -0,0 +1,143 @@ +//! [TDBIN-BENCH-GATE] Criterion benchmark gate: TDBIN vs Protobuf (`prost`). +//! +//! The size gate in `tests/size_gate.rs` pins deterministic byte counts. This +//! benchmark uses the same corpus values for statistical encode/decode timing, +//! so the benchmark report compares exactly the bytes the size gate records. + +/// Shared TDBIN and Protobuf corpus values. +#[path = "../tests/support/bench_corpus.rs"] +mod bench_corpus; + +use std::hint::black_box; +use std::time::Duration; + +use bench_corpus::corpus; +use criterion::{criterion_group, criterion_main, BenchmarkId, Criterion}; +use prost::Message; +use tdbin::{pack, Struct, TdBin}; + +/// Return a TDBIN encoded message or terminate the benchmark process. +fn td_bytes(value: &T) -> Vec { + match value.to_bytes() { + Ok(bytes) => bytes, + Err(error) => { + eprintln!("tdbin encode failed before benchmark: {error:?}"); + std::process::exit(1); + } + } +} + +/// Return a packed TDBIN body or terminate the benchmark process. +fn packed_bytes(body: &[u8]) -> Vec { + match pack::encode(body) { + Ok(bytes) => bytes, + Err(error) => { + eprintln!("tdbin pack failed before benchmark: {error:?}"); + std::process::exit(1); + } + } +} + +/// Return a Protobuf encoded message or terminate the benchmark process. +fn pb_bytes(value: &P) -> Vec { + let mut out = Vec::with_capacity(value.encoded_len()); + match value.encode(&mut out) { + Ok(()) => out, + Err(error) => { + eprintln!("protobuf encode failed before benchmark: {error:?}"); + std::process::exit(1); + } + } +} + +/// Benchmark all encode/decode operations for one paired corpus fixture. +fn bench_fixture(c: &mut Criterion, label: &str, td: &T, pb: &P) +where + T: Struct + TdBin, + P: Message + Default, +{ + let bare = td_bytes(td); + let packed = packed_bytes(&bare); + let protobuf = pb_bytes(pb); + println!( + "[{label}] sizes: tdbin_bare={} tdbin_packed={} protobuf={}", + bare.len(), + packed.len(), + protobuf.len() + ); + + let mut group = c.benchmark_group(format!("tdbin_vs_protobuf/{label}")); + let _ = group.bench_with_input( + BenchmarkId::new("tdbin_encode_bare", label), + td, + |b, value| { + b.iter(|| black_box(value).to_bytes()); + }, + ); + let _ = group.bench_with_input( + BenchmarkId::new("protobuf_encode", label), + pb, + |b, value| { + b.iter(|| { + let mut out = Vec::with_capacity(black_box(value).encoded_len()); + black_box(value).encode(&mut out).map(|()| out) + }); + }, + ); + let _ = group.bench_with_input( + BenchmarkId::new("tdbin_decode_bare", label), + &bare, + |b, bytes| { + b.iter(|| T::from_bytes(black_box(bytes.as_slice()))); + }, + ); + let _ = group.bench_with_input( + BenchmarkId::new("tdbin_decode_packed_framed_body", label), + &packed, + |b, bytes| { + b.iter(|| { + pack::decode(black_box(bytes.as_slice())) + .and_then(|body| T::from_bytes(black_box(body.as_slice()))) + }); + }, + ); + let _ = group.bench_with_input( + BenchmarkId::new("protobuf_decode", label), + &protobuf, + |b, bytes| { + b.iter(|| P::decode(black_box(bytes.as_slice()))); + }, + ); + group.finish(); +} + +/// Criterion entry point for the TDBIN-vs-Protobuf benchmark suite. +fn criterion_benchmark(c: &mut Criterion) { + bench_fixture( + c, + "with_address", + &corpus::td_with_address(), + &corpus::pb_with_address(), + ); + bench_fixture( + c, + "without_address", + &corpus::td_without_address(), + &corpus::pb_without_address(), + ); + bench_fixture( + c, + "metric_batch", + &corpus::td_metric_batch(), + &corpus::pb_metric_batch(), + ); +} + +criterion_group! { + name = benches; + config = Criterion::default() + .sample_size(20) + .measurement_time(Duration::from_secs(3)); + targets = criterion_benchmark +} +criterion_main!(benches); diff --git a/crates/tdbin/examples/bench.rs b/crates/tdbin/examples/bench.rs new file mode 100644 index 0000000..30ed73e --- /dev/null +++ b/crates/tdbin/examples/bench.rs @@ -0,0 +1,131 @@ +//! [TDBIN-BENCH-GATE] Honest speed benchmark: TDBIN vs Protobuf (`prost`). +//! +//! For each of the two corpus fixtures this times a large fixed iteration count +//! of encode and decode for both codecs (plus TDBIN pack/unpack), reporting the +//! per-operation `Duration` and which codec is faster, alongside the three +//! encoded sizes. Every timed value is wrapped in `std::hint::black_box`; per-op +//! duration is `elapsed.checked_div(iters)` (never raw `/`), and "faster" is a +//! `Duration` comparison — no fabricated or derived numbers. +//! +//! Run with: `cargo run -p tdbin --release --example bench`. + +/// Shared TDBIN and Protobuf corpus values. +#[path = "../tests/support/bench_corpus.rs"] +mod bench_corpus; + +use bench_corpus::corpus; + +use prost::Message; +use std::cmp::Ordering; +use std::hint::black_box; +use std::time::{Duration, Instant}; +use tdbin::{pack, Struct, TdBin}; + +/// Boxed-error alias so operations compose with `?`. +type BoxErr = Box; + +/// Timed iterations per operation. +const ITERS: u32 = 20_000; +/// Untimed warm-up iterations run before each measurement. +const WARMUP: u32 = 1_000; + +/// Time `ITERS` invocations of `op` (after `WARMUP` warm-up runs) and return the +/// per-operation `Duration`. Each result flows through `black_box` so the +/// optimizer cannot elide the work. +fn time_per_op(mut op: impl FnMut() -> Result) -> Result { + for _ in 0..WARMUP { + let _ = black_box(op()?); + } + let start = Instant::now(); + for _ in 0..ITERS { + let _ = black_box(op()?); + } + start + .elapsed() + .checked_div(ITERS) + .ok_or_else(|| "iteration count was zero".to_owned().into()) +} + +/// Encode `td` to TDBIN bytes (one benchmark op). +fn enc_td(td: &T) -> Result, BoxErr> { + black_box(td).to_bytes().map_err(Into::into) +} + +/// Encode `pb` to Protobuf bytes into a right-sized buffer (one benchmark op). +fn enc_pb(pb: &P) -> Result, BoxErr> { + let mut buf = Vec::with_capacity(pb.encoded_len()); + black_box(pb).encode(&mut buf)?; + Ok(buf) +} + +/// Report which codec is faster for one operation. +fn verdict(td: Duration, pb: Duration) -> &'static str { + match td.cmp(&pb) { + Ordering::Less => "TDBIN faster", + Ordering::Greater => "prost faster", + Ordering::Equal => "tie", + } +} + +/// Print one comparison row: operation, TDBIN per-op, prost per-op, verdict. +fn row(op: &str, td: Duration, pb: Duration) { + println!( + " {op:<7} TDBIN {td:>12?} prost {pb:>12?} -> {}", + verdict(td, pb) + ); +} + +/// Time and print encode, decode, and pack/unpack for a single fixture. +fn bench_fixture(label: &str, td: &T, pb: &P) -> Result<(), BoxErr> +where + T: Struct + TdBin, + P: Message + Default, +{ + let bare = td.to_bytes()?; + let packed = pack::encode(&bare)?; + let pb_bytes = enc_pb(pb)?; + println!( + "[{label}] sizes: tdbin_bare={} tdbin_packed={} protobuf={}", + bare.len(), + packed.len(), + pb_bytes.len() + ); + row( + "encode", + time_per_op(|| enc_td(td))?, + time_per_op(|| enc_pb(pb))?, + ); + row( + "decode", + time_per_op(|| T::from_bytes(black_box(bare.as_slice())).map_err(Into::into))?, + time_per_op(|| P::decode(black_box(pb_bytes.as_slice())).map_err(Into::into))?, + ); + // Supplementary TDBIN-internal timings (not a prost comparison): the cost to + // pack the bare body and to unpack it back. + let pack_enc = time_per_op(|| pack::encode(black_box(bare.as_slice())).map_err(Into::into))?; + let unpack = time_per_op(|| pack::decode(black_box(packed.as_slice())).map_err(Into::into))?; + println!(" pack TDBIN pack {pack_enc:>10?} TDBIN unpack {unpack:>10?}"); + Ok(()) +} + +/// Run the TDBIN-vs-Protobuf benchmark over both corpus fixtures. +fn main() -> Result<(), BoxErr> { + println!("TDBIN vs Protobuf (prost) — {ITERS} timed iters/op, release build"); + println!("per-op duration (lower is faster); pack row is TDBIN pack vs unpack"); + bench_fixture( + "with_address", + &corpus::td_with_address(), + &corpus::pb_with_address(), + )?; + bench_fixture( + "without_address", + &corpus::td_without_address(), + &corpus::pb_without_address(), + )?; + bench_fixture( + "metric_batch", + &corpus::td_metric_batch(), + &corpus::pb_metric_batch(), + )?; + Ok(()) +} diff --git a/crates/tdbin/fuzz/.gitignore b/crates/tdbin/fuzz/.gitignore new file mode 100644 index 0000000..188f196 --- /dev/null +++ b/crates/tdbin/fuzz/.gitignore @@ -0,0 +1,3 @@ +artifacts/ +corpus/ +target/ diff --git a/crates/tdbin/fuzz/Cargo.lock b/crates/tdbin/fuzz/Cargo.lock new file mode 100644 index 0000000..3c01607 --- /dev/null +++ b/crates/tdbin/fuzz/Cargo.lock @@ -0,0 +1,94 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 4 + +[[package]] +name = "arbitrary" +version = "1.4.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c3d036a3c4ab069c7b410a2ce876bd74808d2d0888a82667669f8e783a898bf1" + +[[package]] +name = "cc" +version = "1.2.66" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f5d6cac793997bd970000024b2934968efe83b382de4fdcf4fcb46b6ee4ad996" +dependencies = [ + "find-msvc-tools", + "jobserver", + "libc", + "shlex", +] + +[[package]] +name = "cfg-if" +version = "1.0.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801" + +[[package]] +name = "find-msvc-tools" +version = "0.1.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582" + +[[package]] +name = "getrandom" +version = "0.4.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "300e883d756b2e4ec94e02791f39b04b522276138852cfc41d9fb7e904106099" +dependencies = [ + "cfg-if", + "libc", + "r-efi", +] + +[[package]] +name = "jobserver" +version = "0.1.35" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1c00acbd29eabad4a2392fa0e921c874934dbbf4194312ad20f04a0ed67a3cb3" +dependencies = [ + "getrandom", + "libc", +] + +[[package]] +name = "libc" +version = "0.2.186" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66" + +[[package]] +name = "libfuzzer-sys" +version = "0.4.13" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a9fd2f41a1cba099f79a0b6b6c35656cf7c03351a7bae8ff0f28f25270f929d2" +dependencies = [ + "arbitrary", + "cc", +] + +[[package]] +name = "r-efi" +version = "6.0.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf" + +[[package]] +name = "shlex" +version = "2.0.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba" + +[[package]] +name = "tdbin" +version = "0.0.0" + +[[package]] +name = "tdbin-fuzz" +version = "0.0.0" +dependencies = [ + "libfuzzer-sys", + "tdbin", +] diff --git a/crates/tdbin/fuzz/Cargo.toml b/crates/tdbin/fuzz/Cargo.toml new file mode 100644 index 0000000..e63a7e5 --- /dev/null +++ b/crates/tdbin/fuzz/Cargo.toml @@ -0,0 +1,21 @@ +[package] +name = "tdbin-fuzz" +version = "0.0.0" +edition = "2021" +publish = false + +[package.metadata] +cargo-fuzz = true + +[workspace] + +[dependencies] +libfuzzer-sys = "0.4" +tdbin = { path = ".." } + +[[bin]] +name = "decode" +path = "fuzz_targets/decode.rs" +test = false +doc = false +bench = false diff --git a/crates/tdbin/fuzz/fuzz_targets/decode.rs b/crates/tdbin/fuzz/fuzz_targets/decode.rs new file mode 100644 index 0000000..6da9d5b --- /dev/null +++ b/crates/tdbin/fuzz/fuzz_targets/decode.rs @@ -0,0 +1,72 @@ +#![no_main] + +//! [TDBIN-TEST-FUZZ] libFuzzer target for total decode over arbitrary bytes. + +use libfuzzer_sys::fuzz_target; +use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; + +/// Fixed fuzz schema with scalar, pointer, and nested-child coverage. +#[derive(Debug, PartialEq, Eq)] +struct FuzzRecord { + /// Packed Bool field. + enabled: bool, + /// Scalar field. + count: i64, + /// Optional string pointer. + label: Option, + /// Optional nested child pointer. + child: Option, +} + +/// Nested child schema used by [`FuzzRecord`]. +#[derive(Debug, PartialEq, Eq)] +struct FuzzChild { + /// Child scalar field. + code: i64, +} + +impl Struct for FuzzRecord { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 2; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.bool_bit(at, 0, 0, self.enabled)?; + w.scalar(at, 1, tdbin::scalar::i64_bits(self.count))?; + w.string(at, Self::DATA_WORDS, 0, self.label.as_deref())?; + w.child(at, Self::DATA_WORDS, 1, self.child.as_ref()) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let enabled = r.bool_bit(at, 0, 0)?; + let count = tdbin::scalar::i64_from(r.scalar(at, 1)?); + let label = r.string(at, Self::DATA_WORDS, 0)?; + let child = r.child::(at, Self::DATA_WORDS, 1)?; + Ok(Self { + enabled, + count, + label, + child, + }) + } +} + +impl Struct for FuzzChild { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.code)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + Ok(Self { + code: tdbin::scalar::i64_from(r.scalar(at, 0)?), + }) + } +} + +fuzz_target!(|data: &[u8]| { + let _ = FuzzRecord::from_bytes(data); + let _ = FuzzRecord::from_framed_bytes(data); + let _ = tdbin::pack::decode(data); +}); diff --git a/crates/tdbin/src/error.rs b/crates/tdbin/src/error.rs index b417ed7..2abeb39 100644 --- a/crates/tdbin/src/error.rs +++ b/crates/tdbin/src/error.rs @@ -7,6 +7,8 @@ use core::fmt; #[derive(Debug, Clone, PartialEq, Eq)] #[non_exhaustive] pub enum EncodeError { + /// A body was not aligned to the 8-byte word size required by TDBIN. + BadLength, /// A section, offset, or message exceeded a wire-format limit /// ([TDBIN-WIRE-LIMITS]). LimitExceeded, @@ -18,6 +20,7 @@ pub enum EncodeError { impl fmt::Display for EncodeError { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { let msg = match self { + Self::BadLength => "body length is not word-aligned", Self::LimitExceeded => "value exceeds a TDBIN wire-format limit", Self::OffsetOutOfRange => "pointer offset does not fit the signed 30-bit field", }; @@ -43,8 +46,8 @@ pub enum DecodeError { ReservedBits, /// Frame body length did not match the available bytes ([TDBIN-MSG-FRAME]). LengthMismatch, - /// The frame body is packed, but typed unpacking is not available yet. - PackedUnsupported, + /// A packed body ended mid-element ([TDBIN-PACK]). + PackedTruncated, /// Wire length was zero or not a multiple of the 8-byte word size. BadLength, /// A pointer referenced a word outside the message body @@ -88,7 +91,7 @@ impl fmt::Display for DecodeError { } Self::ReservedBits => f.write_str("frame reserved bits or fields were nonzero"), Self::LengthMismatch => f.write_str("frame body length does not match available bytes"), - Self::PackedUnsupported => f.write_str("packed frame bodies are not supported yet"), + Self::PackedTruncated => f.write_str("packed body ended mid-element"), Self::BadLength => f.write_str("wire length is zero or not word-aligned"), Self::PointerOutOfBounds { word_index } => { write!(f, "pointer references out-of-bounds word {word_index}") diff --git a/crates/tdbin/src/frame.rs b/crates/tdbin/src/frame.rs index 7c5fd09..80b3f26 100644 --- a/crates/tdbin/src/frame.rs +++ b/crates/tdbin/src/frame.rs @@ -5,6 +5,7 @@ //! bytes exactly as they appeared on the wire. use crate::error::{DecodeError, EncodeError}; +use crate::pack; /// Header magic bytes: ASCII `TDB1`. const MAGIC: [u8; 4] = [0x54, 0x44, 0x42, 0x31]; @@ -117,6 +118,15 @@ pub fn encode(body: &[u8], options: Options) -> Result, EncodeError> { Ok(out) } +/// Pack `body`, then encode a packed TDBIN frame ([TDBIN-PACK]). +/// +/// # Errors +/// Returns [`EncodeError`] when packing or framing exceeds a limit. +pub fn encode_packed(body: &[u8], schema_hash: Option) -> Result, EncodeError> { + let packed = pack::encode(body)?; + encode(&packed, Options::new(true, schema_hash)) +} + /// Decode a TDBIN frame, validating every reserved field and length. /// /// # Errors diff --git a/crates/tdbin/src/lib.rs b/crates/tdbin/src/lib.rs index 4ec9b5c..6452a45 100644 --- a/crates/tdbin/src/lib.rs +++ b/crates/tdbin/src/lib.rs @@ -17,8 +17,10 @@ mod error; pub mod frame; mod layout; +pub mod pack; mod pointer; mod reader; +pub mod reflect; mod writer; pub mod scalar; @@ -92,6 +94,15 @@ pub trait TdBin: Struct { frame::encode(&body, frame::Options::new(false, schema_hash)) } + /// Encode to a fresh packed framed byte vector ([TDBIN-PACK]). + /// + /// # Errors + /// Returns [`EncodeError`] if the value, packing, or frame exceeds a limit. + fn to_packed_framed_bytes(&self, schema_hash: Option) -> Result, EncodeError> { + let body = self.to_bytes()?; + frame::encode_packed(&body, schema_hash) + } + /// Decode from framed bytes, safe on arbitrary untrusted input. /// /// # Errors @@ -99,7 +110,8 @@ pub trait TdBin: Struct { fn from_framed_bytes(wire: &[u8]) -> Result { let message = frame::decode(wire)?; if message.is_packed() { - Err(DecodeError::PackedUnsupported) + let body = pack::decode(message.body())?; + Reader::message(&body) } else { Reader::message(message.body()) } diff --git a/crates/tdbin/src/pack.rs b/crates/tdbin/src/pack.rs new file mode 100644 index 0000000..509c489 --- /dev/null +++ b/crates/tdbin/src/pack.rs @@ -0,0 +1,321 @@ +//! Cap'n Proto word packing for TDBIN bodies ([TDBIN-PACK]). + +use crate::error::{DecodeError, EncodeError}; + +/// Bytes per TDBIN word. +const WORD_BYTES: usize = 8; +/// Maximum unpacked output accepted by the default decoder. +const MAX_UNPACKED_BYTES: usize = 1 << 29; +/// Tag for a zero-word run. +const ZERO_RUN_TAG: u8 = 0; +/// Tag for an uncompressible passthrough run. +const DENSE_RUN_TAG: u8 = 0xFF; +/// Maximum extra words encoded by a run count. +const MAX_RUN_COUNT: usize = 255; +/// Dense words are no larger as raw passthrough than sparse-packed bytes. +const DENSE_NONZERO_BYTES: u8 = 7; + +/// Pack a word-aligned TDBIN body ([TDBIN-PACK-WORD], [TDBIN-PACK-RUNS]). +/// +/// # Errors +/// Returns [`EncodeError`] when the body is not word-aligned or output capacity +/// overflows. +pub fn encode(body: &[u8]) -> Result, EncodeError> { + body.len() + .is_multiple_of(WORD_BYTES) + .then_some(()) + .ok_or(EncodeError::BadLength)?; + let mut out = Vec::with_capacity(body.len()); + let mut offset = 0; + while offset < body.len() { + let word = read_word(body, offset).map_err(|_| EncodeError::LimitExceeded)?; + offset = encode_word(body, offset, word, &mut out)?; + } + Ok(out) +} + +/// Unpack a packed TDBIN body. +/// +/// # Errors +/// Returns [`DecodeError`] when the packed stream is truncated or would exceed +/// the decoder output cap. +pub fn decode(packed: &[u8]) -> Result, DecodeError> { + let mut out = Vec::with_capacity(initial_decode_capacity(packed.len())?); + let mut cursor = 0; + while cursor < packed.len() { + let tag = read_u8(packed, cursor)?; + cursor = advance(cursor, 1)?; + cursor = decode_tag(tag, packed, cursor, &mut out)?; + } + Ok(out) +} + +/// Encode one word and return the next input offset. +fn encode_word( + body: &[u8], + offset: usize, + word: [u8; WORD_BYTES], + out: &mut Vec, +) -> Result { + let tag = tag_word(word)?; + match tag { + ZERO_RUN_TAG => encode_zero_run(body, offset, out), + DENSE_RUN_TAG => encode_dense_run(body, offset, word, out), + sparse => encode_sparse_word(offset, word, sparse, out), + } +} + +/// Encode a run of all-zero words. +fn encode_zero_run(body: &[u8], offset: usize, out: &mut Vec) -> Result { + let extra = count_zero_extras(body, advance_encode(offset, WORD_BYTES)?)?; + out.push(ZERO_RUN_TAG); + out.push(u8::try_from(extra).map_err(|_| EncodeError::LimitExceeded)?); + let words = extra.checked_add(1).ok_or(EncodeError::LimitExceeded)?; + let bytes = words + .checked_mul(WORD_BYTES) + .ok_or(EncodeError::LimitExceeded)?; + advance_encode(offset, bytes) +} + +/// Encode a dense passthrough run beginning with `word`. +fn encode_dense_run( + body: &[u8], + offset: usize, + word: [u8; WORD_BYTES], + out: &mut Vec, +) -> Result { + let extra = count_dense_extras(body, advance_encode(offset, WORD_BYTES)?)?; + out.push(DENSE_RUN_TAG); + out.extend_from_slice(&word); + out.push(u8::try_from(extra).map_err(|_| EncodeError::LimitExceeded)?); + let start = advance_encode(offset, WORD_BYTES)?; + let extra_bytes = extra + .checked_mul(WORD_BYTES) + .ok_or(EncodeError::LimitExceeded)?; + let end = advance_encode(start, extra_bytes)?; + let raw = body.get(start..end).ok_or(EncodeError::LimitExceeded)?; + out.extend_from_slice(raw); + Ok(end) +} + +/// Encode a sparse word. +fn encode_sparse_word( + offset: usize, + word: [u8; WORD_BYTES], + tag: u8, + out: &mut Vec, +) -> Result { + out.push(tag); + append_nonzero_bytes(word, out); + advance_encode(offset, WORD_BYTES) +} + +/// Decode one tag and return the next packed cursor. +fn decode_tag( + tag: u8, + packed: &[u8], + cursor: usize, + out: &mut Vec, +) -> Result { + match tag { + ZERO_RUN_TAG => decode_zero_run(packed, cursor, out), + DENSE_RUN_TAG => decode_dense_run(packed, cursor, out), + sparse => decode_sparse_word(sparse, packed, cursor, out), + } +} + +/// Decode a zero-word run. +fn decode_zero_run(packed: &[u8], cursor: usize, out: &mut Vec) -> Result { + let extra = usize::from(read_u8(packed, cursor)?); + let words = extra.checked_add(1).ok_or(DecodeError::LimitExceeded)?; + append_zero_words(out, words)?; + advance(cursor, 1) +} + +/// Decode a dense passthrough run. +fn decode_dense_run(packed: &[u8], cursor: usize, out: &mut Vec) -> Result { + let word_end = advance(cursor, WORD_BYTES)?; + append_bytes(out, read_range(packed, cursor, word_end)?)?; + let extra = usize::from(read_u8(packed, word_end)?); + let raw_start = advance(word_end, 1)?; + let raw_bytes = extra + .checked_mul(WORD_BYTES) + .ok_or(DecodeError::LimitExceeded)?; + let raw_end = advance(raw_start, raw_bytes)?; + append_bytes(out, read_range(packed, raw_start, raw_end)?)?; + Ok(raw_end) +} + +/// Decode a sparse word. +fn decode_sparse_word( + tag: u8, + packed: &[u8], + cursor: usize, + out: &mut Vec, +) -> Result { + let mut word = [0_u8; WORD_BYTES]; + let mut next = cursor; + for offset in 0..WORD_BYTES { + next = read_tagged_byte(tag, packed, next, offset, &mut word)?; + } + append_bytes(out, &word)?; + Ok(next) +} + +/// Read a tagged sparse byte when present. +fn read_tagged_byte( + tag: u8, + packed: &[u8], + cursor: usize, + offset: usize, + word: &mut [u8; WORD_BYTES], +) -> Result { + if tag & bit(offset)? == 0 { + Ok(cursor) + } else { + let byte = read_u8(packed, cursor)?; + let slot = word.get_mut(offset).ok_or(DecodeError::LimitExceeded)?; + *slot = byte; + advance(cursor, 1) + } +} + +/// Count extra all-zero words after `offset`. +fn count_zero_extras(body: &[u8], offset: usize) -> Result { + count_matching_extras(body, offset, is_zero_word) +} + +/// Count extra dense words after `offset`. +fn count_dense_extras(body: &[u8], offset: usize) -> Result { + count_matching_extras(body, offset, is_dense_word) +} + +/// Count extra words matching `predicate`, capped by the one-byte run count. +fn count_matching_extras( + body: &[u8], + mut offset: usize, + predicate: fn([u8; WORD_BYTES]) -> Result, +) -> Result { + let mut count = 0; + while count < MAX_RUN_COUNT && offset < body.len() { + let word = read_word(body, offset).map_err(|_| EncodeError::LimitExceeded)?; + if !predicate(word)? { + break; + } + count = count.checked_add(1).ok_or(EncodeError::LimitExceeded)?; + offset = advance_encode(offset, WORD_BYTES)?; + } + Ok(count) +} + +/// Return whether a word is all zero bytes. +fn is_zero_word(word: [u8; WORD_BYTES]) -> Result { + tag_word(word).map(|tag| tag == ZERO_RUN_TAG) +} + +/// Return whether a word is dense enough for passthrough. +fn is_dense_word(word: [u8; WORD_BYTES]) -> Result { + nonzero_count(word).map(|count| count >= DENSE_NONZERO_BYTES) +} + +/// Compute the sparse tag for a word. +fn tag_word(word: [u8; WORD_BYTES]) -> Result { + let mut tag = 0_u8; + for (offset, byte) in word.iter().enumerate() { + if *byte != 0 { + tag |= bit(offset).map_err(|_| EncodeError::LimitExceeded)?; + } + } + Ok(tag) +} + +/// Count non-zero bytes in a word. +fn nonzero_count(word: [u8; WORD_BYTES]) -> Result { + let mut count = 0_u8; + for byte in word { + if byte != 0 { + count = count.checked_add(1).ok_or(EncodeError::LimitExceeded)?; + } + } + Ok(count) +} + +/// Append non-zero bytes in word order. +fn append_nonzero_bytes(word: [u8; WORD_BYTES], out: &mut Vec) { + for byte in word { + if byte != 0 { + out.push(byte); + } + } +} + +/// Append zero words to the output. +fn append_zero_words(out: &mut Vec, words: usize) -> Result<(), DecodeError> { + let bytes = words + .checked_mul(WORD_BYTES) + .ok_or(DecodeError::LimitExceeded)?; + let len = checked_output_len(out.len(), bytes)?; + out.resize(len, 0); + Ok(()) +} + +/// Append bytes while enforcing the unpacked output cap. +fn append_bytes(out: &mut Vec, bytes: &[u8]) -> Result<(), DecodeError> { + checked_output_len(out.len(), bytes.len()).map(|_| ())?; + out.extend_from_slice(bytes); + Ok(()) +} + +/// Initial unpack output capacity, capped by the decoder limit. +fn initial_decode_capacity(packed_len: usize) -> Result { + let doubled = packed_len + .checked_mul(2) + .ok_or(DecodeError::LimitExceeded)?; + Ok(doubled.min(MAX_UNPACKED_BYTES)) +} + +/// Checked output length after appending `bytes`. +fn checked_output_len(current: usize, bytes: usize) -> Result { + let len = current + .checked_add(bytes) + .ok_or(DecodeError::LimitExceeded)?; + (len <= MAX_UNPACKED_BYTES) + .then_some(len) + .ok_or(DecodeError::LimitExceeded) +} + +/// Return the bit for a word byte offset. +fn bit(offset: usize) -> Result { + let shift = u32::try_from(offset).map_err(|_| DecodeError::LimitExceeded)?; + 1_u8.checked_shl(shift).ok_or(DecodeError::LimitExceeded) +} + +/// Read one byte at `offset`. +fn read_u8(bytes: &[u8], offset: usize) -> Result { + bytes + .get(offset) + .copied() + .ok_or(DecodeError::PackedTruncated) +} + +/// Read one word at `offset`. +fn read_word(bytes: &[u8], offset: usize) -> Result<[u8; WORD_BYTES], DecodeError> { + let end = advance(offset, WORD_BYTES)?; + let slice = bytes.get(offset..end).ok_or(DecodeError::PackedTruncated)?; + <[u8; WORD_BYTES]>::try_from(slice).map_err(|_| DecodeError::PackedTruncated) +} + +/// Read the range `start..end`. +fn read_range(bytes: &[u8], start: usize, end: usize) -> Result<&[u8], DecodeError> { + bytes.get(start..end).ok_or(DecodeError::PackedTruncated) +} + +/// Checked offset advance. +fn advance(offset: usize, count: usize) -> Result { + offset.checked_add(count).ok_or(DecodeError::LimitExceeded) +} + +/// Checked offset advance for encode paths. +fn advance_encode(offset: usize, count: usize) -> Result { + offset.checked_add(count).ok_or(EncodeError::LimitExceeded) +} diff --git a/crates/tdbin/src/pointer.rs b/crates/tdbin/src/pointer.rs index 5553be6..5010ca8 100644 --- a/crates/tdbin/src/pointer.rs +++ b/crates/tdbin/src/pointer.rs @@ -10,8 +10,16 @@ const KIND_STRUCT: u64 = 0; const KIND_LIST: u64 = 1; /// Two-bit mask selecting the pointer kind. const KIND_MASK: u64 = 0b11; -/// List element-kind code for a byte list (String / Bytes bodies). +/// List element-kind code for a bit list (`List`). +pub(crate) const ELEM_BIT: u8 = 1; +/// List element-kind code for a byte list (String / Bytes / enum lists). pub(crate) const ELEM_BYTE: u8 = 2; +/// List element-kind code for an eight-byte raw list. +pub(crate) const ELEM_EIGHT_BYTES: u8 = 5; +/// List element-kind code for a pointer list. +pub(crate) const ELEM_POINTER: u8 = 6; +/// List element-kind code for a composite list. +pub(crate) const ELEM_COMPOSITE: u8 = 7; /// Most negative offset expressible in the signed 30-bit field. const OFFSET_MIN: i64 = -(1 << 29); /// Most positive offset expressible in the signed 30-bit field. diff --git a/crates/tdbin/src/reader.rs b/crates/tdbin/src/reader.rs index 4d6c83f..21330a4 100644 --- a/crates/tdbin/src/reader.rs +++ b/crates/tdbin/src/reader.rs @@ -8,7 +8,9 @@ use std::rc::Rc; use crate::error::DecodeError; use crate::layout::{self, WORD_BYTES}; -use crate::pointer::{self, Pointer, ELEM_BYTE}; +use crate::pointer::{ + self, Pointer, ELEM_BIT, ELEM_BYTE, ELEM_COMPOSITE, ELEM_EIGHT_BYTES, ELEM_POINTER, +}; use crate::{Struct, MAX_DEPTH}; /// A bounds-checked view over an encoded message ([TDBIN-SAFE-BOUNDS]). @@ -16,12 +18,31 @@ use crate::{Struct, MAX_DEPTH}; pub struct Reader<'a> { /// The complete message bytes. bytes: &'a [u8], + /// Actual data-section words declared by the struct pointer. + data_words: u16, + /// Actual pointer-section words declared by the struct pointer. + ptr_words: u16, /// Remaining struct-nesting depth ([TDBIN-SAFE-DEPTH]). depth: u32, /// Shared remaining struct-follow budget ([TDBIN-SAFE-AMPLIFY]). budget: Rc>, } +/// Decoded metadata for a composite list body ([TDBIN-LIST-COMPOSITE]). +#[derive(Debug, Clone, Copy)] +struct CompositeList { + /// Word index of the first element body. + first: usize, + /// Number of elements in the list. + count: usize, + /// Data-section words per element. + data_words: u16, + /// Pointer-section words per element. + ptr_words: u16, + /// Total words per element. + stride: usize, +} + impl<'a> Reader<'a> { /// Decode a root value from a complete message ([TDBIN-MSG-BARE]). /// @@ -36,11 +57,18 @@ impl<'a> Reader<'a> { let budget = Rc::new(Cell::new(word_count)); let head = layout::read_word(bytes, 0)?; match pointer::decode(head)? { - Pointer::Struct { offset, .. } => { + Pointer::Struct { + offset, + data_words, + ptr_words, + } => { let at = layout::target(0, offset) .ok_or(DecodeError::PointerOutOfBounds { word_index: 0 })?; + Self::require_struct_bounds(bytes, at, data_words, ptr_words)?; let reader = Self { bytes, + data_words, + ptr_words, depth: MAX_DEPTH, budget, }; @@ -56,12 +84,26 @@ impl<'a> Reader<'a> { /// # Errors /// Returns [`DecodeError`] if the word is out of bounds. pub fn scalar(&self, at: usize, slot: u16) -> Result { + if slot >= self.data_words { + return Ok(0); + } let idx = at .checked_add(usize::from(slot)) .ok_or(DecodeError::PointerOutOfBounds { word_index: at })?; layout::read_word(self.bytes, idx) } + /// Read one packed Bool bit from a data word ([TDBIN-REC-XOR]). + /// + /// # Errors + /// Returns [`DecodeError`] if the slot is out of bounds or the bit is invalid. + pub fn bool_bit(&self, at: usize, slot: u16, bit: u8) -> Result { + let mask = 1_u64 + .checked_shl(u32::from(bit)) + .ok_or(DecodeError::LimitExceeded)?; + self.scalar(at, slot).map(|word| word & mask != 0) + } + /// Read an optional UTF-8 string from pointer `slot` ([TDBIN-PRIM-MAP]). /// /// # Errors @@ -69,10 +111,10 @@ impl<'a> Reader<'a> { pub fn string( &self, at: usize, - data_words: u16, + _data_words: u16, slot: u16, ) -> Result, DecodeError> { - match self.read_bytes(at, data_words, slot)? { + match self.read_bytes(at, slot)? { None => Ok(None), Some(raw) => String::from_utf8(raw) .map(Some) @@ -87,10 +129,88 @@ impl<'a> Reader<'a> { pub fn bytes( &self, at: usize, - data_words: u16, + _data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + self.read_bytes(at, slot) + } + + /// Read an optional raw byte list from pointer `slot` ([TDBIN-LIST-ELEM]). + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + pub fn byte_list( + &self, + at: usize, + _data_words: u16, slot: u16, ) -> Result>, DecodeError> { - self.read_bytes(at, data_words, slot) + self.read_bytes(at, slot) + } + + /// Read an optional bit-packed Bool list from pointer `slot`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + pub fn bool_list( + &self, + at: usize, + _data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + self.read_list(at, slot, ELEM_BIT, Self::read_bool_body) + } + + /// Read an optional raw 64-bit word list from pointer `slot`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + pub fn word_list( + &self, + at: usize, + _data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + self.read_list(at, slot, ELEM_EIGHT_BYTES, Self::read_word_body) + } + + /// Read an optional list of 16-byte scalar words from pointer `slot`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + pub fn bytes16_list( + &self, + at: usize, + _data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + self.read_composite(at, slot, Self::read_bytes16_body) + } + + /// Read an optional list of strings from pointer `slot`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input or invalid UTF-8. + pub fn string_list( + &self, + at: usize, + _data_words: u16, + slot: u16, + ) -> Result>, DecodeError> { + self.read_pointer_list(at, slot, Self::read_string_pointer) + } + + /// Read an optional list of byte arrays from pointer `slot`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input. + pub fn bytes_list( + &self, + at: usize, + _data_words: u16, + slot: u16, + ) -> Result>>, DecodeError> { + self.read_pointer_list(at, slot, Self::read_bytes_pointer) } /// Read an optional child struct from pointer `slot` ([TDBIN-PTR-STRUCT]). @@ -100,25 +220,45 @@ impl<'a> Reader<'a> { pub fn child( &self, at: usize, - data_words: u16, + _data_words: u16, slot: u16, ) -> Result, DecodeError> { - let ptr_word = Self::ptr_index(at, data_words, slot)?; + if slot >= self.ptr_words { + return Ok(None); + } + let ptr_word = self.ptr_index(at, slot)?; match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { Pointer::Null => Ok(None), - Pointer::Struct { offset, .. } => self.follow_struct::(ptr_word, offset).map(Some), + Pointer::Struct { + offset, + data_words, + ptr_words, + } => self + .follow_struct::(ptr_word, offset, data_words, ptr_words) + .map(Some), Pointer::List { .. } => Err(DecodeError::PointerKindMismatch), } } - /// Read an optional raw byte list from pointer `slot`. - fn read_bytes( + /// Read an optional composite list of child structs from pointer `slot`. + /// + /// # Errors + /// Returns [`DecodeError`] on malformed input, depth, or amplification. + pub fn child_list( &self, at: usize, - data_words: u16, + _data_words: u16, slot: u16, - ) -> Result>, DecodeError> { - let ptr_word = Self::ptr_index(at, data_words, slot)?; + ) -> Result>, DecodeError> { + self.read_composite(at, slot, Self::read_child_body::) + } + + /// Read an optional raw byte list from pointer `slot`. + fn read_bytes(&self, at: usize, slot: u16) -> Result>, DecodeError> { + if slot >= self.ptr_words { + return Ok(None); + } + let ptr_word = self.ptr_index(at, slot)?; match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { Pointer::Null => Ok(None), Pointer::List { @@ -132,11 +272,115 @@ impl<'a> Reader<'a> { } } + /// Read a non-composite list body using `read_body`. + fn read_list( + &self, + at: usize, + slot: u16, + expected_elem: u8, + read_body: F, + ) -> Result, DecodeError> + where + F: Fn(&Self, usize, i64, u32) -> Result, + { + if slot >= self.ptr_words { + return Ok(None); + } + let ptr_word = self.ptr_index(at, slot)?; + match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { + Pointer::Null => Ok(None), + Pointer::List { + offset, + elem, + count, + } if elem == expected_elem => read_body(self, ptr_word, offset, count).map(Some), + Pointer::List { .. } | Pointer::Struct { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Read a composite list body using `read_body`. + fn read_composite( + &self, + at: usize, + slot: u16, + read_body: F, + ) -> Result, DecodeError> + where + F: Fn(&Self, CompositeList) -> Result, + { + if slot >= self.ptr_words { + return Ok(None); + } + let ptr_word = self.ptr_index(at, slot)?; + match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { + Pointer::Null => Ok(None), + Pointer::List { + offset, + elem: ELEM_COMPOSITE, + count, + } => self + .read_composite_header(ptr_word, offset, count) + .and_then(|info| read_body(self, info)) + .map(Some), + Pointer::List { .. } | Pointer::Struct { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Read a pointer list body using `read_one` for each element pointer. + fn read_pointer_list( + &self, + at: usize, + slot: u16, + read_one: F, + ) -> Result>, DecodeError> + where + F: Fn(&Self, usize) -> Result, + { + self.read_list(at, slot, ELEM_POINTER, |reader, ptr_word, offset, count| { + reader.read_pointer_body(ptr_word, offset, count, &read_one) + }) + } + /// Follow a struct pointer, enforcing depth and amplification budgets. - fn follow_struct(&self, ptr_word: usize, offset: i64) -> Result { + fn follow_struct( + &self, + ptr_word: usize, + offset: i64, + data_words: u16, + ptr_words: u16, + ) -> Result { let target = layout::target(ptr_word, offset).ok_or(DecodeError::PointerOutOfBounds { word_index: ptr_word, })?; + Self::require_struct_bounds(self.bytes, target, data_words, ptr_words)?; + let depth = self + .depth + .checked_sub(1) + .ok_or(DecodeError::DepthExceeded)?; + let left = self + .budget + .get() + .checked_sub(1) + .ok_or(DecodeError::AmplificationExceeded)?; + self.budget.set(left); + let child = Self { + bytes: self.bytes, + data_words, + ptr_words, + depth, + budget: Rc::clone(&self.budget), + }; + C::read_struct(&child, target) + } + + /// Read one inline composite element, enforcing depth and amplification. + fn read_inline_struct( + &self, + target: usize, + data_words: u16, + ptr_words: u16, + ) -> Result { + Self::require_struct_bounds(self.bytes, target, data_words, ptr_words)?; let depth = self .depth .checked_sub(1) @@ -149,6 +393,8 @@ impl<'a> Reader<'a> { self.budget.set(left); let child = Self { bytes: self.bytes, + data_words, + ptr_words, depth, budget: Rc::clone(&self.budget), }; @@ -192,9 +438,230 @@ impl<'a> Reader<'a> { } } + /// Read a bit-packed Bool list body. + fn read_bool_body( + &self, + ptr_word: usize, + offset: i64, + count: u32, + ) -> Result, DecodeError> { + let start = Self::list_start(ptr_word, offset)?; + let len = usize::try_from(count).map_err(|_| DecodeError::LimitExceeded)?; + let words = len + .checked_add(WORD_BITS - 1) + .ok_or(DecodeError::LimitExceeded)? + / WORD_BITS; + Self::require_word_range(self.bytes, start, words)?; + self.unpack_bools(start, len) + } + + /// Read a raw word list body. + fn read_word_body( + &self, + ptr_word: usize, + offset: i64, + count: u32, + ) -> Result, DecodeError> { + let start = Self::list_start(ptr_word, offset)?; + let len = usize::try_from(count).map_err(|_| DecodeError::LimitExceeded)?; + Self::require_word_range(self.bytes, start, len)?; + let mut out = Vec::with_capacity(len); + for i in 0..len { + let idx = start.checked_add(i).ok_or(DecodeError::LimitExceeded)?; + out.push(layout::read_word(self.bytes, idx)?); + } + Ok(out) + } + + /// Read a pointer list body. + fn read_pointer_body( + &self, + ptr_word: usize, + offset: i64, + count: u32, + read_one: &F, + ) -> Result, DecodeError> + where + F: Fn(&Self, usize) -> Result, + { + let start = Self::list_start(ptr_word, offset)?; + let len = usize::try_from(count).map_err(|_| DecodeError::LimitExceeded)?; + Self::require_word_range(self.bytes, start, len)?; + let mut out = Vec::with_capacity(len); + for i in 0..len { + let idx = start.checked_add(i).ok_or(DecodeError::LimitExceeded)?; + out.push(read_one(self, idx)?); + } + Ok(out) + } + + /// Read one string element from a pointer-list body. + fn read_string_pointer(&self, ptr_word: usize) -> Result { + match self.read_bytes_pointer(ptr_word)? { + raw if raw.is_empty() => Ok(String::new()), + raw => String::from_utf8(raw).map_err(|_| DecodeError::InvalidUtf8), + } + } + + /// Read one byte-array element from a pointer-list body. + fn read_bytes_pointer(&self, ptr_word: usize) -> Result, DecodeError> { + match pointer::decode(layout::read_word(self.bytes, ptr_word)?)? { + Pointer::Null => Ok(Vec::new()), + Pointer::List { + offset, + elem, + count, + } => self.read_list_bytes(ptr_word, offset, elem, count), + Pointer::Struct { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Read a 16-byte semantic-scalar composite list body. + fn read_bytes16_body(&self, info: CompositeList) -> Result, DecodeError> { + if info.data_words != 2 || info.ptr_words != 0 { + return Err(DecodeError::PointerKindMismatch); + } + let mut out = Vec::with_capacity(info.count); + for i in 0..info.count { + let at = info.elem_at(i)?; + let hi_at = at.checked_add(1).ok_or(DecodeError::LimitExceeded)?; + out.push(( + layout::read_word(self.bytes, at)?, + layout::read_word(self.bytes, hi_at)?, + )); + } + Ok(out) + } + + /// Read a child-struct composite list body. + fn read_child_body(&self, info: CompositeList) -> Result, DecodeError> { + let mut out = Vec::with_capacity(info.count); + for i in 0..info.count { + out.push(self.read_inline_struct::( + info.elem_at(i)?, + info.data_words, + info.ptr_words, + )?); + } + Ok(out) + } + + /// Decode and validate a composite list tag word. + fn read_composite_header( + &self, + ptr_word: usize, + offset: i64, + count: u32, + ) -> Result { + let tag_at = Self::list_start(ptr_word, offset)?; + match pointer::decode(layout::read_word(self.bytes, tag_at)?)? { + Pointer::Struct { + offset, + data_words, + ptr_words, + } => Self::composite_info(self.bytes, tag_at, offset, data_words, ptr_words, count), + Pointer::Null | Pointer::List { .. } => Err(DecodeError::PointerKindMismatch), + } + } + + /// Build validated composite list metadata from a decoded tag. + fn composite_info( + bytes: &[u8], + tag_at: usize, + count: i64, + data_words: u16, + ptr_words: u16, + elem_words: u32, + ) -> Result { + let count = usize::try_from(count).map_err(|_| DecodeError::PointerKindMismatch)?; + let stride = usize::from(data_words) + .checked_add(usize::from(ptr_words)) + .ok_or(DecodeError::LimitExceeded)?; + let expected = stride + .checked_mul(count) + .ok_or(DecodeError::LimitExceeded)?; + let actual = usize::try_from(elem_words).map_err(|_| DecodeError::LimitExceeded)?; + if expected != actual || (stride == 0 && count != 0) { + return Err(DecodeError::PointerKindMismatch); + } + let first = tag_at.checked_add(1).ok_or(DecodeError::LimitExceeded)?; + Self::require_word_range( + bytes, + tag_at, + expected.checked_add(1).ok_or(DecodeError::LimitExceeded)?, + )?; + Ok(CompositeList { + first, + count, + data_words, + ptr_words, + stride, + }) + } + + /// Resolve a list pointer target. + fn list_start(ptr_word: usize, offset: i64) -> Result { + layout::target(ptr_word, offset).ok_or(DecodeError::PointerOutOfBounds { + word_index: ptr_word, + }) + } + + /// Unpack `count` bools from a bit-packed list body. + fn unpack_bools(&self, start: usize, count: usize) -> Result, DecodeError> { + let mut out = Vec::with_capacity(count); + for i in 0..count { + let word = i / WORD_BITS; + let bit = u32::try_from(i % WORD_BITS).map_err(|_| DecodeError::LimitExceeded)?; + let idx = start.checked_add(word).ok_or(DecodeError::LimitExceeded)?; + let mask = 1_u64.checked_shl(bit).ok_or(DecodeError::LimitExceeded)?; + out.push(layout::read_word(self.bytes, idx)? & mask != 0); + } + Ok(out) + } + /// Absolute word index of pointer `slot`. - fn ptr_index(at: usize, data_words: u16, slot: u16) -> Result { - layout::ptr_word(at, data_words, usize::from(slot)) + fn ptr_index(&self, at: usize, slot: u16) -> Result { + layout::ptr_word(at, self.data_words, usize::from(slot)) .ok_or(DecodeError::PointerOutOfBounds { word_index: at }) } + + /// Require a struct body to fit inside the message. + fn require_struct_bounds( + bytes: &[u8], + at: usize, + data_words: u16, + ptr_words: u16, + ) -> Result<(), DecodeError> { + let words = usize::from(data_words) + .checked_add(usize::from(ptr_words)) + .ok_or(DecodeError::LimitExceeded)?; + let end = at.checked_add(words).ok_or(DecodeError::LimitExceeded)?; + (end <= bytes.len() / WORD_BYTES) + .then_some(()) + .ok_or(DecodeError::PointerOutOfBounds { word_index: at }) + } + + /// Require `words` words starting at `at` to fit inside the message. + fn require_word_range(bytes: &[u8], at: usize, words: usize) -> Result<(), DecodeError> { + let end = at.checked_add(words).ok_or(DecodeError::LimitExceeded)?; + (end <= bytes.len() / WORD_BYTES) + .then_some(()) + .ok_or(DecodeError::PointerOutOfBounds { word_index: at }) + } +} + +/// Bits packed per word when reading a bool list. +const WORD_BITS: usize = WORD_BYTES * 8; + +impl CompositeList { + /// Absolute word index of element `i`. + fn elem_at(self, i: usize) -> Result { + let offset = self + .stride + .checked_mul(i) + .ok_or(DecodeError::LimitExceeded)?; + self.first + .checked_add(offset) + .ok_or(DecodeError::LimitExceeded) + } } diff --git a/crates/tdbin/src/reflect.rs b/crates/tdbin/src/reflect.rs new file mode 100644 index 0000000..79e9c0b --- /dev/null +++ b/crates/tdbin/src/reflect.rs @@ -0,0 +1,251 @@ +//! Optional reflective tooling bridge ([TDBIN-RS-REFLECT]). +//! +//! This module deliberately stays off the serialization hot path. The core +//! `Struct`/`TdBin` implementation still encodes typed values directly. Tooling +//! that wants a dynamic tree can opt into [`ValueCodec`]: generated or manual +//! types describe their [`TypeDef`] and convert to/from [`Value`], while the +//! final bytes still flow through the typed codec. + +use core::fmt; + +use crate::{DecodeError, EncodeError, TdBin}; + +/// A reflected type definition. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum TypeDef { + /// A record definition with named fields. + Record { + /// Type name. + name: String, + /// Record fields in declaration order. + fields: Vec, + }, + /// A tagged union definition with named variants. + Union { + /// Type name. + name: String, + /// Union variants in ordinal order. + variants: Vec, + }, + /// An alias definition. + Alias { + /// Alias name. + name: String, + /// Alias target. + target: TypeRef, + }, +} + +/// A reflected record field. +#[derive(Debug, Clone, PartialEq, Eq)] +pub struct FieldDef { + /// Field name. + pub name: String, + /// Field type. + pub ty: TypeRef, +} + +/// A reflected union variant. +#[derive(Debug, Clone, PartialEq, Eq)] +pub struct VariantDef { + /// Variant name. + pub name: String, + /// Tuple/named payload fields. Empty means a bare variant. + pub fields: Vec, + /// Optional pinned source-level ordinal for tooling. + pub pinned: Option, +} + +/// A reflected type reference. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum TypeRef { + /// Boolean scalar. + Bool, + /// Signed 64-bit integer scalar. + Int, + /// IEEE-754 double scalar. + Float, + /// UTF-8 string scalar. + Str, + /// Raw byte-list scalar. + Bytes, + /// Microsecond UTC timestamp scalar. + DateTime, + /// 16-byte UUID scalar. + Uuid, + /// 16-byte decimal scalar. + Decimal, + /// Optional value. + Option(Box), + /// List value. + List(Box), + /// Named record/union/alias reference. + Named(String), + /// Generic parameter reference for tooling metadata. + Param(String), +} + +/// A dynamic value tree used by tooling. +#[derive(Debug, Clone, PartialEq)] +pub enum Value { + /// Unit value. + Unit, + /// Boolean scalar. + Bool(bool), + /// Signed integer scalar. + Int(i64), + /// Floating-point scalar. + Float(f64), + /// UTF-8 string scalar. + Str(String), + /// Raw bytes scalar. + Bytes(Vec), + /// Microsecond UTC timestamp scalar. + DateTime(i64), + /// 16-byte UUID scalar. + Uuid([u8; 16]), + /// 16-byte decimal scalar. + Decimal([u8; 16]), + /// Optional value. + Option(Option>), + /// List value. + List(Vec), + /// Record value with fields in any tooling order. + Record { + /// Named field values. + fields: Vec<(String, Value)>, + }, + /// Union value. + Union { + /// Variant name. + variant: String, + /// Optional payload value. + value: Option>, + }, +} + +/// Errors returned by the reflective tooling bridge. +#[derive(Debug, Clone, PartialEq, Eq)] +#[non_exhaustive] +pub enum ReflectError { + /// Dynamic value shape did not match the reflected type. + TypeMismatch, + /// A required field was absent from a dynamic record value. + MissingField { + /// Missing field name. + name: String, + }, + /// A dynamic record value contained an unknown field. + UnknownField { + /// Unknown field name. + name: String, + }, + /// A dynamic union value named an unknown variant. + UnknownVariant { + /// Unknown variant name. + name: String, + }, + /// Typed encoding failed. + Encode(EncodeError), + /// Typed decoding failed. + Decode(DecodeError), +} + +impl fmt::Display for ReflectError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::TypeMismatch => f.write_str("dynamic value does not match the reflected type"), + Self::MissingField { name } => write!(f, "dynamic record is missing field {name}"), + Self::UnknownField { name } => { + write!(f, "dynamic record contains unknown field {name}") + } + Self::UnknownVariant { name } => { + write!(f, "dynamic union contains unknown variant {name}") + } + Self::Encode(err) => write!(f, "typed encode failed: {err}"), + Self::Decode(err) => write!(f, "typed decode failed: {err}"), + } + } +} + +impl std::error::Error for ReflectError {} + +impl From for ReflectError { + fn from(value: EncodeError) -> Self { + Self::Encode(value) + } +} + +impl From for ReflectError { + fn from(value: DecodeError) -> Self { + Self::Decode(value) + } +} + +/// Tooling bridge from a typed TDBIN value to a dynamic [`Value`] tree. +pub trait ValueCodec: TdBin { + /// Return the reflected type definition for this generated/manual type. + fn type_def() -> TypeDef; + + /// Convert a typed value into a dynamic value tree. + fn to_value(&self) -> Value; + + /// Convert a dynamic value tree into a typed value. + /// + /// # Errors + /// Returns [`ReflectError`] when the dynamic value shape does not match. + fn from_value(value: &Value) -> Result; +} + +/// Encode a dynamic value through the typed codec for `T`. +/// +/// # Errors +/// Returns [`ReflectError`] when value conversion or typed encoding fails. +pub fn encode(value: &Value) -> Result, ReflectError> { + T::from_value(value)?.to_bytes().map_err(ReflectError::from) +} + +/// Decode bytes through the typed codec for `T`, then materialize a dynamic tree. +/// +/// # Errors +/// Returns [`ReflectError`] when typed decoding fails. +pub fn decode(wire: &[u8]) -> Result { + T::from_bytes(wire) + .map(|value| value.to_value()) + .map_err(ReflectError::from) +} + +/// Verify bytes by decoding through the typed codec for `T`. +/// +/// # Errors +/// Returns [`ReflectError`] when typed decoding fails. +pub fn verify(wire: &[u8]) -> Result<(), ReflectError> { + T::from_bytes(wire).map(|_| ()).map_err(ReflectError::from) +} + +/// Return the reflected type definition for `T`. +#[must_use] +pub fn type_def() -> TypeDef { + T::type_def() +} + +/// Return a field value by name, rejecting missing or duplicate fields. +/// +/// # Errors +/// Returns [`ReflectError`] if the field is absent or duplicated. +pub fn field<'a>(fields: &'a [(String, Value)], name: &str) -> Result<&'a Value, ReflectError> { + let mut found = fields.iter().filter(|(field, _)| field == name); + let value = found + .next() + .map(|(_, value)| value) + .ok_or_else(|| ReflectError::MissingField { + name: name.to_owned(), + })?; + if found.next().is_some() { + Err(ReflectError::UnknownField { + name: name.to_owned(), + }) + } else { + Ok(value) + } +} diff --git a/crates/tdbin/src/scalar.rs b/crates/tdbin/src/scalar.rs index f5405dc..66a085a 100644 --- a/crates/tdbin/src/scalar.rs +++ b/crates/tdbin/src/scalar.rs @@ -37,3 +37,23 @@ pub fn f64_bits(value: f64) -> u64 { pub fn f64_from(word: u64) -> f64 { f64::from_bits(word) } + +/// Split a 16-byte semantic scalar into two little-endian words. +#[must_use] +pub const fn bytes16_words(bytes: &[u8; 16]) -> (u64, u64) { + let [b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14, b15] = *bytes; + ( + u64::from_le_bytes([b0, b1, b2, b3, b4, b5, b6, b7]), + u64::from_le_bytes([b8, b9, b10, b11, b12, b13, b14, b15]), + ) +} + +/// Join two little-endian words into a 16-byte semantic scalar. +#[must_use] +pub const fn bytes16_from_words(first: u64, second: u64) -> [u8; 16] { + let [a0, a1, a2, a3, a4, a5, a6, a7] = first.to_le_bytes(); + let [b0, b1, b2, b3, b4, b5, b6, b7] = second.to_le_bytes(); + [ + a0, a1, a2, a3, a4, a5, a6, a7, b0, b1, b2, b3, b4, b5, b6, b7, + ] +} diff --git a/crates/tdbin/src/writer.rs b/crates/tdbin/src/writer.rs index fb37cb7..9ea5fc4 100644 --- a/crates/tdbin/src/writer.rs +++ b/crates/tdbin/src/writer.rs @@ -4,13 +4,15 @@ use crate::error::EncodeError; use crate::layout::{self, WORD_BYTES}; -use crate::pointer::{self, ELEM_BYTE}; +use crate::pointer::{self, ELEM_BIT, ELEM_BYTE, ELEM_COMPOSITE, ELEM_EIGHT_BYTES, ELEM_POINTER}; use crate::Struct; /// Upper bound on message body words (a safety cap for the encoder). const MAX_WORDS: usize = 1 << 26; /// Bytes packed per word when laying out a byte list. const BYTES_PER_WORD: usize = WORD_BYTES; +/// Bits packed per word when laying out a bool list. +const BITS_PER_WORD: usize = WORD_BYTES * 8; /// Accumulates message body words while encoding a value tree. #[derive(Debug)] @@ -71,6 +73,32 @@ impl Writer { self.set(idx, bits) } + /// Write one packed Bool bit into a data word ([TDBIN-REC-XOR]). + /// + /// # Errors + /// Returns [`EncodeError`] if the slot index overflows or the bit is invalid. + pub fn bool_bit( + &mut self, + at: usize, + slot: u16, + bit: u8, + value: bool, + ) -> Result<(), EncodeError> { + let idx = at + .checked_add(usize::from(slot)) + .ok_or(EncodeError::LimitExceeded)?; + let mask = 1_u64 + .checked_shl(u32::from(bit)) + .ok_or(EncodeError::LimitExceeded)?; + let cell = self.body.get_mut(idx).ok_or(EncodeError::LimitExceeded)?; + if value { + *cell |= mask; + } else { + *cell &= !mask; + } + Ok(()) + } + /// Write an optional UTF-8 string into pointer `slot` ([TDBIN-PRIM-MAP]). /// /// # Errors @@ -107,6 +135,114 @@ impl Writer { } } + /// Write an optional raw byte list into pointer `slot` ([TDBIN-LIST-ELEM]). + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn byte_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[u8]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(raw) => self.write_byte_list(ptr_word, raw), + } + } + + /// Write an optional bit-packed Bool list into pointer `slot`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn bool_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[bool]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(bits) => self.write_bool_list(ptr_word, bits), + } + } + + /// Write an optional raw 64-bit word list into pointer `slot`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn word_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[u64]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(words) => self.write_word_list(ptr_word, words), + } + } + + /// Write an optional list of 16-byte scalar values into pointer `slot`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn bytes16_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[(u64, u64)]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(words) => self.write_bytes16_list(ptr_word, words), + } + } + + /// Write an optional list of strings into pointer `slot`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn string_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[String]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(items) => self.write_string_list(ptr_word, items), + } + } + + /// Write an optional list of byte arrays into pointer `slot`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn bytes_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[Vec]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(items) => self.write_bytes_list(ptr_word, items), + } + } + /// Write an optional child struct into pointer `slot` ([TDBIN-PTR-STRUCT]). /// /// # Errors @@ -125,6 +261,24 @@ impl Writer { } } + /// Write an optional composite list of child structs into pointer `slot`. + /// + /// # Errors + /// Returns [`EncodeError`] if the message exceeds a wire-format limit. + pub fn child_list( + &mut self, + at: usize, + data_words: u16, + slot: u16, + value: Option<&[C]>, + ) -> Result<(), EncodeError> { + let ptr_word = Self::ptr_index(at, data_words, slot)?; + match value { + None => self.set(ptr_word, 0), + Some(items) => self.write_composite_list(ptr_word, items), + } + } + /// Absolute word index of pointer `slot`. fn ptr_index(at: usize, data_words: u16, slot: u16) -> Result { layout::ptr_word(at, data_words, usize::from(slot)).ok_or(EncodeError::LimitExceeded) @@ -154,6 +308,165 @@ impl Writer { self.set(ptr_word, ptr) } + /// Append a bit-packed Bool list body and patch its list pointer word. + fn write_bool_list(&mut self, ptr_word: usize, values: &[bool]) -> Result<(), EncodeError> { + let words = values + .len() + .checked_add(BITS_PER_WORD - 1) + .ok_or(EncodeError::LimitExceeded)? + / BITS_PER_WORD; + let start = self.reserve(words)?; + self.pack_bools(start, values)?; + self.set_list_ptr(ptr_word, start, ELEM_BIT, values.len()) + } + + /// Append a raw word list body and patch its list pointer word. + fn write_word_list(&mut self, ptr_word: usize, values: &[u64]) -> Result<(), EncodeError> { + let start = self.reserve(values.len())?; + for (i, word) in values.iter().copied().enumerate() { + let idx = start.checked_add(i).ok_or(EncodeError::LimitExceeded)?; + self.set(idx, word)?; + } + self.set_list_ptr(ptr_word, start, ELEM_EIGHT_BYTES, values.len()) + } + + /// Append a list whose elements are pointer words. + fn write_pointer_list( + &mut self, + ptr_word: usize, + values: &[T], + mut write_one: F, + ) -> Result<(), EncodeError> + where + F: FnMut(&mut Self, usize, &T) -> Result<(), EncodeError>, + { + let start = self.reserve(values.len())?; + self.set_list_ptr(ptr_word, start, ELEM_POINTER, values.len())?; + for (i, value) in values.iter().enumerate() { + let idx = start.checked_add(i).ok_or(EncodeError::LimitExceeded)?; + write_one(self, idx, value)?; + } + Ok(()) + } + + /// Append a pointer list whose elements point at UTF-8 byte lists. + fn write_string_list(&mut self, ptr_word: usize, values: &[String]) -> Result<(), EncodeError> { + self.write_pointer_list(ptr_word, values, |writer, idx, value| { + writer.write_byte_list(idx, value.as_bytes()) + }) + } + + /// Append a pointer list whose elements point at raw byte lists. + fn write_bytes_list(&mut self, ptr_word: usize, values: &[Vec]) -> Result<(), EncodeError> { + self.write_pointer_list(ptr_word, values, |writer, idx, value| { + writer.write_byte_list(idx, value) + }) + } + + /// Append a composite list body and patch its list pointer word. + fn write_composite_list( + &mut self, + ptr_word: usize, + values: &[C], + ) -> Result<(), EncodeError> { + let stride = C::body_words().ok_or(EncodeError::LimitExceeded)?; + if stride == 0 { + return Err(EncodeError::LimitExceeded); + } + let elem_words = stride + .checked_mul(values.len()) + .ok_or(EncodeError::LimitExceeded)?; + let start = self.reserve_tagged_list(elem_words)?; + self.write_composite_tag(start, values.len(), C::DATA_WORDS, C::PTR_WORDS)?; + self.write_composite_items(start, stride, values)?; + self.set_list_ptr(ptr_word, start, ELEM_COMPOSITE, elem_words) + } + + /// Append a 16-byte scalar composite list and patch its list pointer word. + fn write_bytes16_list( + &mut self, + ptr_word: usize, + values: &[(u64, u64)], + ) -> Result<(), EncodeError> { + let elem_words = values + .len() + .checked_mul(2) + .ok_or(EncodeError::LimitExceeded)?; + let start = self.reserve_tagged_list(elem_words)?; + self.write_composite_tag(start, values.len(), 2, 0)?; + self.write_bytes16_items(start, values)?; + self.set_list_ptr(ptr_word, start, ELEM_COMPOSITE, elem_words) + } + + /// Reserve the tag word plus `elem_words` for a composite list. + fn reserve_tagged_list(&mut self, elem_words: usize) -> Result { + let words = elem_words + .checked_add(1) + .ok_or(EncodeError::LimitExceeded)?; + self.reserve(words) + } + + /// Write the struct-shaped composite tag word. + fn write_composite_tag( + &mut self, + start: usize, + count: usize, + data_words: u16, + ptr_words: u16, + ) -> Result<(), EncodeError> { + let count_i64 = i64::try_from(count).map_err(|_| EncodeError::LimitExceeded)?; + let tag = pointer::encode_struct(count_i64, data_words, ptr_words)?; + self.set(start, tag) + } + + /// Write every item into an already-reserved composite list body. + fn write_composite_items( + &mut self, + start: usize, + stride: usize, + values: &[C], + ) -> Result<(), EncodeError> { + for (i, value) in values.iter().enumerate() { + let offset = stride.checked_mul(i).ok_or(EncodeError::LimitExceeded)?; + let at = start + .checked_add(1) + .and_then(|body| body.checked_add(offset)) + .ok_or(EncodeError::LimitExceeded)?; + value.write_struct(self, at)?; + } + Ok(()) + } + + /// Write every 16-byte scalar into an already-reserved composite list body. + fn write_bytes16_items( + &mut self, + start: usize, + values: &[(u64, u64)], + ) -> Result<(), EncodeError> { + for (i, (lo, hi)) in values.iter().copied().enumerate() { + let at = start + .checked_add(1) + .and_then(|body| body.checked_add(i.checked_mul(2)?)) + .ok_or(EncodeError::LimitExceeded)?; + self.set(at, lo)?; + self.set(at.checked_add(1).ok_or(EncodeError::LimitExceeded)?, hi)?; + } + Ok(()) + } + + /// Patch a list pointer word after appending its body. + fn set_list_ptr( + &mut self, + ptr_word: usize, + start: usize, + elem: u8, + count: usize, + ) -> Result<(), EncodeError> { + let offset = rel_offset(start, ptr_word)?; + let ptr = pointer::encode_list(offset, elem, count)?; + self.set(ptr_word, ptr) + } + /// Pack raw bytes little-endian into words beginning at `start`. fn pack_bytes(&mut self, start: usize, data: &[u8]) -> Result<(), EncodeError> { for (i, chunk) in data.chunks(BYTES_PER_WORD).enumerate() { @@ -168,6 +481,22 @@ impl Writer { Ok(()) } + /// Pack bools little-endian into words beginning at `start`. + fn pack_bools(&mut self, start: usize, values: &[bool]) -> Result<(), EncodeError> { + for (i, value) in values.iter().copied().enumerate() { + if value { + let word = i / BITS_PER_WORD; + let bit = + u32::try_from(i % BITS_PER_WORD).map_err(|_| EncodeError::LimitExceeded)?; + let idx = start.checked_add(word).ok_or(EncodeError::LimitExceeded)?; + let mask = 1_u64.checked_shl(bit).ok_or(EncodeError::LimitExceeded)?; + let cell = self.body.get_mut(idx).ok_or(EncodeError::LimitExceeded)?; + *cell |= mask; + } + } + Ok(()) + } + /// Flatten the body to a little-endian byte vector ([TDBIN-ENC-CANON]). fn into_bytes(self) -> Vec { let mut out = Vec::new(); diff --git a/crates/tdbin/tests/evolution.rs b/crates/tdbin/tests/evolution.rs new file mode 100644 index 0000000..ea2933d --- /dev/null +++ b/crates/tdbin/tests/evolution.rs @@ -0,0 +1,252 @@ +//! [TDBIN-TEST-EVOLVE] Evolution compatibility tests for short/long structs and +//! appended union variants. + +use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; + +/// Boxed-error alias for fallible tests. +type TestResult = Result<(), Box>; + +/// Version 1 record: one scalar plus one pointer. +#[derive(Debug, PartialEq, Eq)] +struct RecordV1 { + /// Stable id field. + id: i64, + /// Stable name field. + name: String, +} + +impl Struct for RecordV1 { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.id))?; + w.string(at, Self::DATA_WORDS, 0, Some(&self.name)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let id = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let name = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + Ok(Self { id, name }) + } +} + +/// Version 2 record: appends a scalar after the original fields. +#[derive(Debug, PartialEq, Eq)] +struct RecordV2 { + /// Stable id field. + id: i64, + /// Stable name field. + name: String, + /// Appended scalar field. + age: i64, +} + +impl Struct for RecordV2 { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.id))?; + w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; + w.scalar(at, 1, tdbin::scalar::i64_bits(self.age)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let id = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let name = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + let age = tdbin::scalar::i64_from(r.scalar(at, 1)?); + Ok(Self { id, name, age }) + } +} + +/// Version 1 union with a single payload variant. +#[derive(Debug, PartialEq, Eq)] +enum EventV1 { + /// Original string payload variant. + Created(String), +} + +impl Struct for EventV1 { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + match self { + Self::Created(text) => { + w.scalar(at, 0, 0)?; + w.string(at, Self::DATA_WORDS, 0, Some(text)) + } + } + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::Created( + r.string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + ordinal => Err(DecodeError::UnknownVariant { ordinal }), + } + } +} + +/// Version 2 union appending a bare variant. +#[derive(Debug, PartialEq, Eq)] +enum EventV2 { + /// Original string payload variant. + Created(String), + /// Appended bare variant. + Deleted, +} + +impl Struct for EventV2 { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + match self { + Self::Created(text) => { + w.scalar(at, 0, 0)?; + w.string(at, Self::DATA_WORDS, 0, Some(text)) + } + Self::Deleted => { + w.scalar(at, 0, 1)?; + Ok(()) + } + } + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::Created( + r.string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + 1 => Ok(Self::Deleted), + ordinal => Err(DecodeError::UnknownVariant { ordinal }), + } + } +} + +/// Writer with a discriminant outside the narrow reader's known range. +#[derive(Debug, PartialEq, Eq)] +struct WideOrdinal; + +impl Struct for WideOrdinal { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, 256) + } + + fn read_struct(_r: &Reader<'_>, _at: usize) -> Result { + Ok(Self) + } +} + +/// Reader for the pre-width-crossing enum schema. +#[derive(Debug, PartialEq, Eq)] +enum TinyEnum { + /// First known variant. + A, + /// Second known variant. + B, +} + +impl Struct for TinyEnum { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + match self { + Self::A => w.scalar(at, 0, 0), + Self::B => w.scalar(at, 0, 1), + } + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::A), + 1 => Ok(Self::B), + ordinal => Err(DecodeError::UnknownVariant { ordinal }), + } + } +} + +/// [TDBIN-REC-SHORT] A newer reader gets default zeros for appended scalar +/// fields when reading an older, shorter struct. +#[test] +fn appended_scalar_defaults_when_reader_schema_is_longer() -> TestResult { + let old = RecordV1 { + id: 7, + name: "Ada".to_owned(), + }; + let decoded = RecordV2::from_bytes(&old.to_bytes()?)?; + assert_eq!( + decoded, + RecordV2 { + id: 7, + name: "Ada".to_owned(), + age: 0, + } + ); + Ok(()) +} + +/// [TDBIN-REC-SHORT] An older reader ignores appended scalar fields while still +/// finding pointer slots after the writer's longer data section. +#[test] +fn appended_scalar_is_ignored_when_reader_schema_is_shorter() -> TestResult { + let new = RecordV2 { + id: 8, + name: "Grace".to_owned(), + age: 42, + }; + let decoded = RecordV1::from_bytes(&new.to_bytes()?)?; + assert_eq!( + decoded, + RecordV1 { + id: 8, + name: "Grace".to_owned(), + } + ); + Ok(()) +} + +/// [TDBIN-EVOLVE-APPEND] Existing appended union variants remain readable by the +/// newer schema. +#[test] +fn appended_variant_schema_reads_original_variant() -> TestResult { + let old = EventV1::Created("node".to_owned()); + assert_eq!( + EventV2::from_bytes(&old.to_bytes()?)?, + EventV2::Created("node".to_owned()) + ); + Ok(()) +} + +/// [TDBIN-UNION-UNKNOWN] Older schemas reject newer appended variants as typed +/// unknown ordinals. +#[test] +fn older_variant_schema_reports_new_variant_ordinal() -> TestResult { + match EventV1::from_bytes(&EventV2::Deleted.to_bytes()?) { + Err(DecodeError::UnknownVariant { ordinal: 1 }) => Ok(()), + other => Err(format!("expected UnknownVariant ordinal 1, got {other:?}").into()), + } +} + +/// [TDBIN-EVOLVE-WIDTH] Width-crossing enum growth is surfaced as a typed +/// unknown ordinal for the old reader. +#[test] +fn width_crossing_ordinal_is_a_typed_breaking_error() -> TestResult { + match TinyEnum::from_bytes(&WideOrdinal.to_bytes()?) { + Err(DecodeError::UnknownVariant { ordinal: 256 }) => Ok(()), + other => Err(format!("expected UnknownVariant ordinal 256, got {other:?}").into()), + } +} diff --git a/crates/tdbin/tests/frame.rs b/crates/tdbin/tests/frame.rs index 11c90f2..85f4680 100644 --- a/crates/tdbin/tests/frame.rs +++ b/crates/tdbin/tests/frame.rs @@ -105,20 +105,20 @@ fn tdbin_msg_frame_round_trips_generated_typed_value() -> TestResult { Ok(()) } -/// [TDBIN-MSG-FRAME] Typed framed decode rejects packed bodies until unpacking lands. +/// [TDBIN-MSG-FRAME] Typed framed decode unpacks packed bodies. #[test] -fn tdbin_msg_frame_typed_decode_rejects_packed_body() -> TestResult { +fn tdbin_msg_frame_typed_decode_accepts_packed_body() -> TestResult { let person = person_for_frame(Contact::Phone(PhoneContact { number: 777, country: 1, })); let body = person.to_bytes()?; - let framed = frame::encode(&body, Options::new(true, None))?; + let framed = frame::encode_packed(&body, None)?; assert_eq!( Person::from_framed_bytes(&framed), - Err(DecodeError::PackedUnsupported), - "typed decode must not treat packed bodies as bare messages" + Ok(person), + "typed decode must unpack packed frame bodies" ); Ok(()) } diff --git a/crates/tdbin/tests/fuzz_decode.rs b/crates/tdbin/tests/fuzz_decode.rs index b383123..b8be0fe 100644 --- a/crates/tdbin/tests/fuzz_decode.rs +++ b/crates/tdbin/tests/fuzz_decode.rs @@ -1,148 +1,103 @@ -//! [TDBIN-TEST-FUZZ] Decode-robustness lane: a large, deterministic adversarial -//! corpus driven through the PUBLIC codec API (`TdBin::from_bytes`), proving the -//! decoder is total and safe on arbitrary untrusted bytes ([TDBIN-RS-NOPANIC], -//! [TDBIN-SAFE-DEPTH], [TDBIN-SAFE-UTF8], [TDBIN-UNION-UNKNOWN]). +//! [TDBIN-TEST-FUZZ] Decode-robustness lane driven through the PUBLIC codec API +//! on the typeDiagram-GENERATED ADTs (`mod generated;`) — never hand-written +//! `impl Struct`. A DETERMINISTIC, enumerated adversarial corpus (no PRNG, no +//! randomness) proves the decoder is total and safe on arbitrary untrusted bytes +//! ([TDBIN-RS-NOPANIC], [TDBIN-SAFE-UTF8], [TDBIN-UNION-UNKNOWN]). //! -//! This lane is intentionally DISJOINT from `roundtrip.rs`: that file pins the -//! fixed `BadLength`/`NullRoot`/`ReservedPointerKind`/`PointerKindMismatch` byte -//! patterns; here we cover what it does not — randomized mutation under the -//! decode-determinism and canonical-fixpoint invariants, plus the depth cap, the -//! unknown-union ordinal, and the invalid-UTF-8 path. Every type and its codec is -//! hand-written against the STABLE public `Struct` trait, so this lane never -//! depends on generated fixtures or the wire-format additions in flight. +//! Invariants are asserted at the BYTE level (canonical re-encode), never by +//! comparing decoded values: `Person` carries an `f64` (`score`) and `NaN != NaN` +//! would make value equality non-reflexive on mutated input. Byte-level checks are +//! both NaN-safe and strictly stronger (they pin the canonical encoding). //! -//! Floating-point scalars are deliberately excluded from the fuzzed types: a -//! random `f64` is frequently `NaN`, and `NaN != NaN` would make the value-based -//! fixpoint assertion non-reflexive. `f64` fidelity is covered by `roundtrip.rs`. +//! Disjoint from `roundtrip.rs`: that file pins the fixed error byte-patterns; +//! here we enumerate every single-byte and length mutation of a valid message and +//! assert decode determinism + the canonical byte-fixpoint, plus the unknown-union +//! ordinal, invalid-UTF-8, and depth-cap ([TDBIN-SAFE-DEPTH]) paths. `Deep` is the +//! one hand-written `Struct` here, allowed by exception: the depth cap needs +//! unbounded self-nesting and no generated ADT is recursive. +mod generated; + +use generated::{Address, Contact, EmailContact, Person, PhoneContact}; use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; /// Boxed-error alias so tests use `?` without `unwrap`/`expect`. type TestResult = Result<(), Box>; -/// Fuzz iterations per shape (deterministic; each is cheap). -const ROUNDS: usize = 512; -/// Fixed PRNG seed — the corpus is fully reproducible ([TDBIN-TEST-FUZZ]). -const SEED: u64 = 0x853c_49e6_748f_ea9b; - -// ── Hand-written `Struct` shapes, one per decode path ── - -/// A pointerless record of two scalar words (data-section decode). -#[derive(Debug, Clone, PartialEq)] -struct Flat { - /// Signed-integer scalar slot. - count: i64, - /// Boolean scalar slot. - flag: bool, -} +/// Fixed single-byte XOR masks applied at every offset (deterministic, no PRNG). +const MASKS: [u8; 3] = [0x01, 0x80, 0xFF]; -impl Struct for Flat { - const DATA_WORDS: u16 = 2; - const PTR_WORDS: u16 = 0; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.scalar(at, 0, tdbin::scalar::i64_bits(self.count))?; - w.scalar(at, 1, tdbin::scalar::bool_bits(self.flag))?; - Ok(()) - } +// ── Valid bases (constructed values; the codec itself stays codegen-only) ── - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let count = tdbin::scalar::i64_from(r.scalar(at, 0)?); - let flag = tdbin::scalar::bool_from(r.scalar(at, 1)?); - Ok(Self { count, flag }) +/// A representative valid `Person` used as the mutation base. +fn sample_person() -> Person { + Person { + name: "Fuzz Base".to_owned(), + age: 7, + active: true, + score: 1.0, + address: Some(Address { + street: "N St".to_owned(), + zip: 3, + }), + nickname: Some("fb".to_owned()), + contact: Contact::Phone(PhoneContact { + number: 5, + country: 6, + }), } } -/// A single required string (pointer-section decode + UTF-8 validation). -#[derive(Debug, Clone, PartialEq)] -struct WithString { - /// Required UTF-8 string field. - text: String, +/// A representative valid `Contact` used as the mutation base. +fn sample_contact() -> Contact { + Contact::Email(EmailContact { + addr: "e@x.io".to_owned(), + }) } -impl Struct for WithString { - const DATA_WORDS: u16 = 0; - const PTR_WORDS: u16 = 1; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.string(at, Self::DATA_WORDS, 0, Some(&self.text))?; - Ok(()) - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let text = r - .string(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?; - Ok(Self { text }) - } -} - -/// A one-scalar leaf used as a union payload. -#[derive(Debug, Clone, PartialEq)] -struct Leaf { - /// Scalar payload. - value: i64, -} - -impl Struct for Leaf { - const DATA_WORDS: u16 = 1; - const PTR_WORDS: u16 = 0; - - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - w.scalar(at, 0, tdbin::scalar::i64_bits(self.value))?; - Ok(()) - } - - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - Ok(Self { - value: tdbin::scalar::i64_from(r.scalar(at, 0)?), - }) - } -} - -/// A tagged union: discriminant word plus a payload child pointer. -#[derive(Debug, Clone, PartialEq)] -enum Choice { - /// Ordinal 0. - First(Leaf), - /// Ordinal 1. - Second(Leaf), -} - -impl Struct for Choice { - const DATA_WORDS: u16 = 1; - const PTR_WORDS: u16 = 1; +// ── Deterministic corpus generation ── - fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { - match self { - Self::First(payload) => { - w.scalar(at, 0, 0)?; - w.child(at, Self::DATA_WORDS, 0, Some(payload)) - } - Self::Second(payload) => { - w.scalar(at, 0, 1)?; - w.child(at, Self::DATA_WORDS, 0, Some(payload)) +/// Every single-byte XOR mutation of `base` (one per offset per fixed mask). +fn byte_mutations(base: &[u8]) -> Vec> { + let mut out = Vec::new(); + for (i, _) in base.iter().enumerate() { + for &mask in &MASKS { + let mut m = base.to_vec(); + if let Some(b) = m.get_mut(i) { + *b ^= mask; } + out.push(m); } } + out +} - fn read_struct(r: &Reader<'_>, at: usize) -> Result { - match r.scalar(at, 0)? { - 0 => Ok(Self::First( - r.child::(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?, - )), - 1 => Ok(Self::Second( - r.child::(at, Self::DATA_WORDS, 0)? - .ok_or(DecodeError::UnexpectedNull)?, - )), - ordinal => Err(DecodeError::UnknownVariant { ordinal }), +/// Every prefix of `base` (aligned and unaligned) plus word/byte appends. +fn length_mutations(base: &[u8]) -> Vec> { + let mut out = Vec::new(); + for take in 0..=base.len() { + if let Some(prefix) = base.get(..take) { + out.push(prefix.to_vec()); } } + let mut plus_word = base.to_vec(); + plus_word.extend_from_slice(&[0u8; 8]); + out.push(plus_word); + let mut plus_byte = base.to_vec(); + plus_byte.push(0xAA); + out.push(plus_byte); + out } -/// A self-referential struct used to build nesting past the decoder depth cap. -#[derive(Debug, Clone, PartialEq)] +/// First index at which `needle` occurs in `haystack`, if any. +fn find_subslice(haystack: &[u8], needle: &[u8]) -> Option { + haystack.windows(needle.len()).position(|w| w == needle) +} + +/// The one hand-written `Struct` in this lane (allowed by exception): the depth +/// cap needs unbounded self-nesting via `Box`, and no generated ADT is recursive. +/// Its codec mirrors exactly what codegen emits for a single optional child. +#[derive(Debug, PartialEq)] struct Deep { /// Optional next link. next: Option>, @@ -158,93 +113,11 @@ impl Struct for Deep { } fn read_struct(r: &Reader<'_>, at: usize) -> Result { - let next = r.child::(at, Self::DATA_WORDS, 0)?.map(Box::new); + let next = r.child::(at, Self::DATA_WORDS, 0)?.map(Box::new); Ok(Self { next }) } } -// ── Deterministic corpus generation ── - -/// A minimal LCG PRNG (deterministic, wrapping — no timing or OS entropy). -struct Lcg { - /// Current internal state. - state: u64, -} - -impl Lcg { - /// Seed the generator. - fn new(seed: u64) -> Self { - Self { state: seed } - } - - /// Advance and return the next pseudo-random word. - fn next(&mut self) -> u64 { - self.state = self - .state - .wrapping_mul(6_364_136_223_846_793_005) - .wrapping_add(1_442_695_040_888_963_407); - self.state - } -} - -/// Bit-flip roughly one in eight bytes of `base`. -fn flip_bits(lcg: &mut Lcg, base: &[u8]) -> Vec { - let mut out = base.to_vec(); - for byte in &mut out { - if lcg.next() & 0x07 == 0 { - if let Some(&mask) = lcg.next().to_le_bytes().first() { - *byte ^= mask; - } - } - } - out -} - -/// Keep a random prefix of whole words (may be empty → `BadLength` path). -fn truncate_words(lcg: &mut Lcg, base: &[u8]) -> Vec { - let keep = usize::try_from(lcg.next() & 0x0F).unwrap_or(0); - base.chunks(8).take(keep).flatten().copied().collect() -} - -/// Append a random number of whole random words. -fn append_words(lcg: &mut Lcg, base: &[u8]) -> Vec { - let extra = usize::try_from(lcg.next() & 0x07).unwrap_or(0); - let mut out = base.to_vec(); - for _ in 0..extra { - out.extend_from_slice(&lcg.next().to_le_bytes()); - } - out -} - -/// Append 1–7 random bytes, breaking word alignment (`BadLength` path). -fn append_tail_bytes(lcg: &mut Lcg, base: &[u8]) -> Vec { - let mut out = base.to_vec(); - let take = usize::try_from((lcg.next() & 0x07) | 0x01).unwrap_or(1); - let word = lcg.next().to_le_bytes(); - out.extend_from_slice(word.get(..take).unwrap_or(&word)); - out -} - -/// Produce one adversarial mutation of `base`. -fn mutate(lcg: &mut Lcg, base: &[u8]) -> Vec { - match lcg.next() & 0x03 { - 0 => flip_bits(lcg, base), - 1 => truncate_words(lcg, base), - 2 => append_words(lcg, base), - _ => append_tail_bytes(lcg, base), - } -} - -/// A buffer of 0–15 fully random whole words. -fn random_words(lcg: &mut Lcg) -> Vec { - let words = usize::try_from(lcg.next() & 0x0F).unwrap_or(0); - let mut out = Vec::new(); - for _ in 0..words { - out.extend_from_slice(&lcg.next().to_le_bytes()); - } - out -} - /// A `Deep` chain `n` links long (root plus `n` nested children). fn deep_chain(n: usize) -> Deep { let mut node = Deep { next: None }; @@ -256,91 +129,69 @@ fn deep_chain(n: usize) -> Deep { node } -/// First index at which `needle` occurs in `haystack`, if any. -fn find_subslice(haystack: &[u8], needle: &[u8]) -> Option { - haystack.windows(needle.len()).position(|w| w == needle) -} - -// ── Invariants ── +// ── Invariants (byte-level; NaN-safe) ── /// Decode `buf`, asserting decode determinism and — when it decodes — the -/// canonical re-encode fixpoint: `from_bytes(x) = Ok(v)` implies re-encoding `v` -/// and decoding again yields exactly `v` ([TDBIN-ENC-CANON], [TDBIN-RS-NOPANIC]). -fn exercise(buf: &[u8]) -> TestResult -where - T: TdBin + Clone + PartialEq + core::fmt::Debug, -{ - let decoded = T::from_bytes(buf); - assert_eq!( - decoded, - T::from_bytes(buf), - "decode of identical bytes must be deterministic" - ); - if let Ok(value) = &decoded { - let reencoded = value.to_bytes()?; - let expected: Result<&T, &DecodeError> = Ok(value); - assert_eq!( - T::from_bytes(&reencoded).as_ref(), - expected, - "decode must be a fixpoint under canonical re-encode" - ); +/// canonical byte-fixpoint: re-encoding the value and decoding again reproduces +/// the same canonical bytes ([TDBIN-ENC-CANON], [TDBIN-RS-NOPANIC]). +fn exercise(buf: &[u8]) -> TestResult { + match (T::from_bytes(buf), T::from_bytes(buf)) { + (Ok(a), Ok(b)) => { + let canonical = a.to_bytes()?; + assert_eq!( + canonical, + b.to_bytes()?, + "identical bytes must decode deterministically" + ); + let again = T::from_bytes(&canonical) + .map_err(|e| format!("canonical re-encode failed to decode: {e:?}"))?; + assert_eq!( + again.to_bytes()?, + canonical, + "canonical re-encode must be a byte-level fixpoint" + ); + } + (Err(a), Err(b)) => assert_eq!(a, b, "identical bytes must fail identically"), + _ => return Err("decode determinism broken: Ok vs Err on identical bytes".into()), } Ok(()) } -/// Run `ROUNDS` mutation and `ROUNDS` random inputs of `T` through `exercise`. -fn fuzz(base: &[u8], lcg: &mut Lcg) -> TestResult -where - T: TdBin + Clone + PartialEq + core::fmt::Debug, -{ - for _ in 0..ROUNDS { - exercise::(&mutate(lcg, base))?; - exercise::(&random_words(lcg))?; +/// Run the base and its full deterministic mutation corpus through `exercise`. +fn fuzz(base: &[u8]) -> TestResult { + exercise::(base)?; + for m in byte_mutations(base) { + exercise::(&m)?; + } + for m in length_mutations(base) { + exercise::(&m)?; } Ok(()) } // ── Tests ── -/// [TDBIN-TEST-FUZZ] Across scalar, string, union, and nested shapes, decode is -/// total (never panics), deterministic, and a canonical re-encode fixpoint over -/// a large mutated + random corpus. -#[test] -fn decode_is_total_deterministic_and_fixpoint_under_fuzz() -> TestResult { - let mut lcg = Lcg::new(SEED); - fuzz::(&Flat { count: -7, flag: true }.to_bytes()?, &mut lcg)?; - fuzz::( - &WithString { - text: "hello, tdbin".to_owned(), - } - .to_bytes()?, - &mut lcg, - )?; - fuzz::(&Choice::Second(Leaf { value: 42 }).to_bytes()?, &mut lcg)?; - fuzz::(&deep_chain(8).to_bytes()?, &mut lcg)?; - Ok(()) -} - -/// [TDBIN-SAFE-DEPTH] The encoder has no depth cap, but decoding a chain nested -/// past `MAX_DEPTH` (64) must return `DepthExceeded`, never overflow the stack. +/// [TDBIN-TEST-FUZZ] Over the full deterministic mutation corpus of a valid +/// Person and Contact, decode is total (never panics), deterministic, and a +/// canonical byte-fixpoint. #[test] -fn depth_cap_rejects_overdeep_nesting() -> TestResult { - let bytes = deep_chain(128).to_bytes()?; - assert_eq!(Deep::from_bytes(&bytes), Err(DecodeError::DepthExceeded)); +fn generated_decode_is_total_deterministic_and_fixpoint() -> TestResult { + fuzz::(&sample_person().to_bytes()?)?; + fuzz::(&sample_contact().to_bytes()?)?; Ok(()) } -/// [TDBIN-UNION-UNKNOWN] A discriminant with no matching variant is rejected as -/// `UnknownVariant`, carrying the offending ordinal — not silently accepted. +/// [TDBIN-UNION-UNKNOWN] A Contact discriminant with no matching variant is +/// rejected as `UnknownVariant` carrying the offending ordinal. #[test] -fn unknown_union_ordinal_is_rejected() -> TestResult { - let bytes = Choice::First(Leaf { value: 1 }).to_bytes()?; +fn unknown_contact_ordinal_is_rejected() -> TestResult { + let bytes = sample_contact().to_bytes()?; let mut evil = bytes.clone(); // The union discriminant is root data word 0 (bytes 8..16 in canonical v0). evil.get_mut(8..16) .ok_or("message too short for a discriminant")? .copy_from_slice(&9u64.to_le_bytes()); - match Choice::from_bytes(&evil) { + match Contact::from_bytes(&evil) { Err(DecodeError::UnknownVariant { ordinal: 9 }) => Ok(()), other => Err(format!("expected UnknownVariant{{ordinal:9}}, got {other:?}").into()), } @@ -349,20 +200,26 @@ fn unknown_union_ordinal_is_rejected() -> TestResult { /// [TDBIN-SAFE-UTF8] A string field carrying a non-UTF-8 byte is rejected as /// `InvalidUtf8`, never surfaced as a lossy or panicking decode. #[test] -fn invalid_utf8_string_is_rejected() -> TestResult { - let marker = "MARKERvalue"; - let bytes = WithString { - text: marker.to_owned(), - } +fn invalid_utf8_in_string_field_is_rejected() -> TestResult { + let marker = "UtF8MARKER"; + let bytes = Contact::Email(EmailContact { + addr: marker.to_owned(), + }) .to_bytes()?; let mut evil = bytes.clone(); let at = find_subslice(&evil, marker.as_bytes()).ok_or("marker not found on the wire")?; - // 0xFF is never a valid UTF-8 byte; corrupt the leading byte of the payload. + // 0xFF is never a valid UTF-8 byte; corrupt the leading payload byte. let byte = evil.get_mut(at).ok_or("payload index past end")?; *byte = 0xFF; - assert_eq!( - WithString::from_bytes(&evil), - Err(DecodeError::InvalidUtf8) - ); + assert_eq!(Contact::from_bytes(&evil), Err(DecodeError::InvalidUtf8)); + Ok(()) +} + +/// [TDBIN-SAFE-DEPTH] The encoder has no depth cap, but decoding a chain nested +/// past `MAX_DEPTH` (64) returns `DepthExceeded` — never overflows the stack. +#[test] +fn depth_cap_rejects_overdeep_nesting() -> TestResult { + let bytes = deep_chain(128).to_bytes()?; + assert_eq!(Deep::from_bytes(&bytes), Err(DecodeError::DepthExceeded)); Ok(()) } diff --git a/crates/tdbin/tests/generated/mod.rs b/crates/tdbin/tests/generated/mod.rs index 31f3f1c..6f82ccd 100644 --- a/crates/tdbin/tests/generated/mod.rs +++ b/crates/tdbin/tests/generated/mod.rs @@ -152,7 +152,7 @@ impl tdbin::Struct for Person { fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> { w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; w.scalar(at, 0, tdbin::scalar::i64_bits(self.age))?; - w.scalar(at, 1, tdbin::scalar::bool_bits(self.active))?; + w.bool_bit(at, 1, 0, self.active)?; w.scalar(at, 2, tdbin::scalar::f64_bits(self.score))?; w.child(at, Self::DATA_WORDS, 1, self.address.as_ref())?; w.string(at, Self::DATA_WORDS, 2, self.nickname.as_deref())?; @@ -165,7 +165,7 @@ impl tdbin::Struct for Person { .string(at, Self::DATA_WORDS, 0)? .ok_or(tdbin::DecodeError::UnexpectedNull)?; let age = tdbin::scalar::i64_from(r.scalar(at, 0)?); - let active = tdbin::scalar::bool_from(r.scalar(at, 1)?); + let active = r.bool_bit(at, 1, 0)?; let score = tdbin::scalar::f64_from(r.scalar(at, 2)?); let address = r.child::
(at, Self::DATA_WORDS, 1)?; let nickname = r.string(at, Self::DATA_WORDS, 2)?; diff --git a/crates/tdbin/tests/golden.rs b/crates/tdbin/tests/golden.rs new file mode 100644 index 0000000..f8f0c9d --- /dev/null +++ b/crates/tdbin/tests/golden.rs @@ -0,0 +1,175 @@ +//! [TDBIN-TEST-GOLDEN] Byte-exact golden vectors for the FROZEN v0 Person/Contact +//! wire layout. Each test pins the encoder to a hex constant AND decodes that +//! frozen hex straight back to the fixture — so an accidental wire-format change +//! (in either direction) is caught deterministically under `make test`. +//! +//! The ADT types and their codec are typeDiagram-GENERATED (`generated/mod.rs`, +//! owned by codegen); this lane only consumes them via `mod generated;` and never +//! hand-writes an `impl Struct`. The Person layout is frozen by agreement, which +//! is what makes byte-exact golden constants legitimate. + +mod generated; + +use generated::{Address, Contact, EmailContact, Person, PhoneContact}; +use tdbin::TdBin; + +/// Boxed-error alias so tests use `?` without `unwrap`/`expect`. +type TestResult = Result<(), Box>; + +// ── Fixtures (distinct from `roundtrip.rs` to broaden coverage, not duplicate) ── + +/// A Person exercising Some(address), Some(nickname), and the Email variant. +fn person_full() -> Person { + Person { + name: "Grace Hopper".to_owned(), + age: 85, + active: true, + score: 12.5, + address: Some(Address { + street: "1 Compiler Rd".to_owned(), + zip: 1906, + }), + nickname: Some("Amazing Grace".to_owned()), + contact: Contact::Email(EmailContact { + addr: "grace@navy.mil".to_owned(), + }), + } +} + +/// A Person exercising None fields, a negative float, and the Phone variant. +fn person_minimal() -> Person { + Person { + name: "Edsger Dijkstra".to_owned(), + age: 72, + active: false, + score: -3.0, + address: None, + nickname: None, + contact: Contact::Phone(PhoneContact { + number: 1930, + country: 31, + }), + } +} + +/// The Email arm of the Contact union, standalone. +fn contact_email() -> Contact { + Contact::Email(EmailContact { + addr: "ada@analytical.uk".to_owned(), + }) +} + +/// The Phone arm of the Contact union, standalone. +fn contact_phone() -> Contact { + Contact::Phone(PhoneContact { + number: 1815, + country: 44, + }) +} + +// ── Hex helpers (no external deps: this crate is offline-safe) ── + +/// Lowercase hex encoding of `bytes`. +fn to_hex(bytes: &[u8]) -> String { + const HEX: &[u8; 16] = b"0123456789abcdef"; + let mut out = String::new(); + for &byte in bytes { + if let (Some(&hi), Some(&lo)) = ( + HEX.get(usize::from(byte >> 4)), + HEX.get(usize::from(byte & 0x0F)), + ) { + out.push(char::from(hi)); + out.push(char::from(lo)); + } + } + out +} + +/// Decode one lowercase hex nibble, or `None` if it is not `[0-9a-f]`. +fn hex_nibble(c: u8) -> Option { + match c { + b'0'..=b'9' => Some(c.wrapping_sub(b'0')), + b'a'..=b'f' => Some(c.wrapping_sub(b'a').wrapping_add(10)), + _ => None, + } +} + +/// Decode a lowercase hex string to bytes. +fn from_hex(s: &str) -> Result, Box> { + let raw = s.as_bytes(); + if !raw.len().is_multiple_of(2) { + return Err("hex string has odd length".into()); + } + let mut out = Vec::new(); + for pair in raw.chunks(2) { + let hi = pair + .first() + .copied() + .and_then(hex_nibble) + .ok_or("bad hex digit")?; + let lo = pair + .get(1) + .copied() + .and_then(hex_nibble) + .ok_or("bad hex digit")?; + out.push((hi << 4) | lo); + } + Ok(out) +} + +/// Assert `value` encodes to exactly `hex`, and that decoding `hex` reproduces it. +fn assert_golden(value: &T, hex: &str) -> TestResult +where + T: TdBin + PartialEq + core::fmt::Debug, +{ + let bytes = value.to_bytes()?; + assert_eq!( + to_hex(&bytes).as_str(), + hex, + "encoder output must match the frozen golden hex" + ); + let decoded = T::from_bytes(&from_hex(hex)?)?; + assert_eq!( + &decoded, value, + "frozen golden bytes must decode to the fixture" + ); + Ok(()) +} + +// ── Frozen golden constants (bootstrapped from the FROZEN v0 encoder) ── + +/// Golden bytes for [`person_full`]. +const PERSON_FULL_HEX: &str = "00000000030004005500000000000000010000000000000000000000000029400d0000006200000010000000010001001d0000006a0000002000000001000100477261636520486f70706572000000007207000000000000010000006a0000003120436f6d70696c6572205264000000416d617a696e672047726163650000000000000000000000000000000000010001000000720000006772616365406e6176792e6d696c0000"; +/// Golden bytes for [`person_minimal`]. +const PERSON_MINIMAL_HEX: &str = "00000000030004004800000000000000000000000000000000000000000008c00d0000007a0000000000000000000000000000000000000008000000010001004564736765722044696a6b7374726100010000000000000000000000020000008a070000000000001f00000000000000"; +/// Golden bytes for [`contact_email`]. +const CONTACT_EMAIL_HEX: &str = "000000000100010000000000000000000000000000000100010000008a00000061646140616e616c79746963616c2e756b00000000000000"; +/// Golden bytes for [`contact_phone`]. +const CONTACT_PHONE_HEX: &str = + "00000000010001000100000000000000000000000200000017070000000000002c00000000000000"; + +// ── Tests ── + +/// [TDBIN-TEST-GOLDEN] Full Person is byte-exact and round-trips from frozen hex. +#[test] +fn person_full_is_byte_exact() -> TestResult { + assert_golden(&person_full(), PERSON_FULL_HEX) +} + +/// [TDBIN-TEST-GOLDEN] Minimal Person is byte-exact and round-trips from frozen hex. +#[test] +fn person_minimal_is_byte_exact() -> TestResult { + assert_golden(&person_minimal(), PERSON_MINIMAL_HEX) +} + +/// [TDBIN-TEST-GOLDEN] `Contact::Email` is byte-exact and round-trips from frozen hex. +#[test] +fn contact_email_is_byte_exact() -> TestResult { + assert_golden(&contact_email(), CONTACT_EMAIL_HEX) +} + +/// [TDBIN-TEST-GOLDEN] `Contact::Phone` is byte-exact and round-trips from frozen hex. +#[test] +fn contact_phone_is_byte_exact() -> TestResult { + assert_golden(&contact_phone(), CONTACT_PHONE_HEX) +} diff --git a/crates/tdbin/tests/lists.rs b/crates/tdbin/tests/lists.rs new file mode 100644 index 0000000..c0d7210 --- /dev/null +++ b/crates/tdbin/tests/lists.rs @@ -0,0 +1,262 @@ +//! [TDBIN-LIST-ELEM] / [TDBIN-LIST-RAW] / [TDBIN-LIST-COMPOSITE] runtime +//! coverage for generated-style list codecs. + +use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; + +/// Boxed-error alias for fallible tests. +type TestResult = Result<(), Box>; + +/// Bytes per TDBIN word. +const WORD_BYTES: usize = 8; +/// List element-kind code for Bool lists. +const ELEM_BIT: u64 = 1; +/// List element-kind code for byte lists. +const ELEM_BYTE: u64 = 2; +/// List element-kind code for 64-bit raw lists. +const ELEM_EIGHT_BYTES: u64 = 5; +/// List element-kind code for pointer lists. +const ELEM_POINTER: u64 = 6; +/// List element-kind code for composite lists. +const ELEM_COMPOSITE: u64 = 7; + +/// Read one little-endian word from a canonical TDBIN byte message. +fn read_word(bytes: &[u8], word_index: usize) -> Result> { + let start = word_index + .checked_mul(WORD_BYTES) + .ok_or("word offset overflow")?; + let end = start.checked_add(WORD_BYTES).ok_or("word end overflow")?; + let raw = bytes.get(start..end).ok_or("word out of bounds")?; + let word = <[u8; WORD_BYTES]>::try_from(raw).map_err(|_| "word slice length")?; + Ok(u64::from_le_bytes(word)) +} + +/// Element kind encoded in a list pointer. +fn elem_kind(word: u64) -> u64 { + (word >> 32) & 0b111 +} + +/// Unsigned positive target of a forward list pointer in this test corpus. +fn forward_target(ptr_word: usize, word: u64) -> Result> { + let offset = usize::try_from((word >> 2) & 0x3FFF_FFFF)?; + ptr_word + .checked_add(1) + .and_then(|base| base.checked_add(offset)) + .ok_or_else(|| "target overflow".into()) +} + +/// Generated-style child struct used in a composite list. +#[derive(Debug, Clone, PartialEq, Eq)] +struct Point { + /// X coordinate. + x: i64, + /// Y coordinate. + y: i64, +} + +impl Struct for Point { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.scalar(at, 0, tdbin::scalar::i64_bits(self.x))?; + w.scalar(at, 1, tdbin::scalar::i64_bits(self.y)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let x = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let y = tdbin::scalar::i64_from(r.scalar(at, 1)?); + Ok(Self { x, y }) + } +} + +/// Generated-style enum-union encoded as one byte per list element. +#[derive(Debug, Clone, PartialEq, Eq)] +enum Color { + /// First ordinal. + Red, + /// Second ordinal. + Green, +} + +/// Generated-style record exercising every emitted list helper. +#[derive(Debug, Clone, PartialEq, Eq)] +struct ListFixture { + /// Bit-packed booleans. + flags: Vec, + /// Raw 64-bit integer values. + scores: Vec, + /// Pointer-list string values. + names: Vec, + /// Pointer-list byte values. + blobs: Vec>, + /// Composite child structs. + points: Vec, + /// Composite 16-byte semantic scalar words. + tokens: Vec<(u64, u64)>, + /// One-byte enum-list values. + colors: Vec, + /// Optional raw list. + maybe_scores: Option>, +} + +impl Struct for ListFixture { + const DATA_WORDS: u16 = 0; + const PTR_WORDS: u16 = 8; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + let scores = self + .scores + .iter() + .map(|value| tdbin::scalar::i64_bits(*value)) + .collect::>(); + let colors = self.colors.iter().map(color_ordinal).collect::>(); + let maybe_scores = self.maybe_scores.as_ref().map(|values| { + values + .iter() + .map(|value| tdbin::scalar::i64_bits(*value)) + .collect::>() + }); + w.bool_list(at, Self::DATA_WORDS, 0, Some(&self.flags))?; + w.word_list(at, Self::DATA_WORDS, 1, Some(&scores))?; + w.string_list(at, Self::DATA_WORDS, 2, Some(&self.names))?; + w.bytes_list(at, Self::DATA_WORDS, 3, Some(&self.blobs))?; + w.child_list(at, Self::DATA_WORDS, 4, Some(&self.points))?; + w.bytes16_list(at, Self::DATA_WORDS, 5, Some(&self.tokens))?; + w.byte_list(at, Self::DATA_WORDS, 6, Some(&colors))?; + w.word_list(at, Self::DATA_WORDS, 7, maybe_scores.as_deref()) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let flags = r.bool_list(at, Self::DATA_WORDS, 0)?.unwrap_or_default(); + let scores = words_to_i64(r.word_list(at, Self::DATA_WORDS, 1)?.unwrap_or_default()); + let names = r.string_list(at, Self::DATA_WORDS, 2)?.unwrap_or_default(); + let blobs = r.bytes_list(at, Self::DATA_WORDS, 3)?.unwrap_or_default(); + let points = r + .child_list::(at, Self::DATA_WORDS, 4)? + .unwrap_or_default(); + let tokens = r.bytes16_list(at, Self::DATA_WORDS, 5)?.unwrap_or_default(); + let colors = bytes_to_colors(r.byte_list(at, Self::DATA_WORDS, 6)?.unwrap_or_default())?; + let maybe_scores = r.word_list(at, Self::DATA_WORDS, 7)?.map(words_to_i64); + Ok(Self { + flags, + scores, + names, + blobs, + points, + tokens, + colors, + maybe_scores, + }) + } +} + +/// Map a generated enum value to its one-byte ordinal. +fn color_ordinal(color: &Color) -> u8 { + match color { + Color::Red => 0, + Color::Green => 1, + } +} + +/// Decode generated enum-list ordinals, rejecting unknown values. +fn bytes_to_colors(values: Vec) -> Result, DecodeError> { + values + .into_iter() + .map(|ordinal| match ordinal { + 0 => Ok(Color::Red), + 1 => Ok(Color::Green), + ordinal => Err(DecodeError::UnknownVariant { + ordinal: u64::from(ordinal), + }), + }) + .collect() +} + +/// Decode raw integer words. +fn words_to_i64(values: Vec) -> Vec { + values.into_iter().map(tdbin::scalar::i64_from).collect() +} + +/// A fixture with non-empty values in every list form. +fn fixture() -> ListFixture { + ListFixture { + flags: vec![true, false, true, true, false, false, true, false, true], + scores: vec![7, -8, 9], + names: vec!["ada".to_owned(), String::new(), "alan".to_owned()], + blobs: vec![vec![1, 2, 3], Vec::new(), vec![4, 5]], + points: vec![Point { x: 1, y: 2 }, Point { x: -3, y: 4 }], + tokens: vec![(0x0102, 0x0304), (0x0506, 0x0708)], + colors: vec![Color::Red, Color::Green, Color::Red], + maybe_scores: Some(vec![10, 11]), + } +} + +/// Lists round-trip through every runtime helper. +#[test] +fn list_forms_round_trip() -> TestResult { + let value = fixture(); + let bytes = value.to_bytes()?; + assert_eq!(ListFixture::from_bytes(&bytes)?, value); + assert_eq!(ListFixture::from_bytes(&bytes)?.to_bytes()?, bytes); + Ok(()) +} + +/// Pointer element kinds and the composite tag word match the wire spec. +#[test] +fn list_element_kinds_and_composite_tag_are_encoded() -> TestResult { + let bytes = fixture().to_bytes()?; + assert_eq!(elem_kind(read_word(&bytes, 1)?), ELEM_BIT); + assert_eq!(elem_kind(read_word(&bytes, 2)?), ELEM_EIGHT_BYTES); + assert_eq!(elem_kind(read_word(&bytes, 3)?), ELEM_POINTER); + assert_eq!(elem_kind(read_word(&bytes, 4)?), ELEM_POINTER); + let point_ptr = read_word(&bytes, 5)?; + assert_eq!(elem_kind(point_ptr), ELEM_COMPOSITE); + assert_eq!(elem_kind(read_word(&bytes, 6)?), ELEM_COMPOSITE); + assert_eq!(elem_kind(read_word(&bytes, 7)?), ELEM_BYTE); + let tag = read_word(&bytes, forward_target(5, point_ptr)?)?; + assert_eq!(tag & 0b11, 0); + assert_eq!((tag >> 2) & 0x3FFF_FFFF, 2); + assert_eq!((tag >> 32) & 0xFFFF, 2); + assert_eq!((tag >> 48) & 0xFFFF, 0); + Ok(()) +} + +/// Missing list pointer slots decode as default empty lists or `None`. +#[test] +fn null_list_pointer_decodes_to_default_or_none() -> TestResult { + let mut bytes = fixture().to_bytes()?; + for word_index in [1_usize, 8] { + let start = word_index + .checked_mul(WORD_BYTES) + .ok_or("word offset overflow")?; + let end = start.checked_add(WORD_BYTES).ok_or("word end overflow")?; + bytes + .get_mut(start..end) + .ok_or("word out of bounds")? + .fill(0); + } + let decoded = ListFixture::from_bytes(&bytes)?; + assert_eq!(decoded.flags, Vec::::new()); + assert_eq!(decoded.maybe_scores, None); + Ok(()) +} + +/// One-byte enum lists reject ordinals with no declared variant. +#[test] +fn enum_list_rejects_unknown_one_byte_ordinal() -> TestResult { + let mut bytes = fixture().to_bytes()?; + let color_ptr = read_word(&bytes, 7)?; + let color_start_word = forward_target(7, color_ptr)?; + let color_start = color_start_word + .checked_mul(WORD_BYTES) + .ok_or("byte offset overflow")?; + let slot = bytes + .get_mut(color_start) + .ok_or("color byte out of bounds")?; + *slot = 9; + assert_eq!( + ListFixture::from_bytes(&bytes), + Err(DecodeError::UnknownVariant { ordinal: 9 }) + ); + Ok(()) +} diff --git a/crates/tdbin/tests/pack.rs b/crates/tdbin/tests/pack.rs new file mode 100644 index 0000000..c449cc9 --- /dev/null +++ b/crates/tdbin/tests/pack.rs @@ -0,0 +1,108 @@ +//! [TDBIN-PACK] black-box tests for Cap'n Proto word packing. + +use tdbin::{frame, pack, DecodeError, TdBin}; + +/// The codegen-emitted ADT types and their TDBIN codec, under test. +mod generated; + +use generated::{Address, Contact, EmailContact, Person}; + +/// A boxed error alias so tests can use `?` without `unwrap`. +type TestResult = Result<(), Box>; + +/// Build a generated `Person` fixture for packed frame tests. +fn packed_person() -> Person { + Person { + name: "Packed Person".to_owned(), + age: 36, + active: true, + score: 9.75, + address: Some(Address { + street: "1 Packed Way".to_owned(), + zip: 1815, + }), + nickname: None, + contact: Contact::Email(EmailContact { + addr: "packed@example.com".to_owned(), + }), + } +} + +/// [TDBIN-PACK-WORD] Sparse words encode as a tag plus non-zero bytes. +#[test] +fn tdbin_pack_word_encodes_sparse_word_byte_exactly() -> TestResult { + let body = [0, 5, 0, 6, 0, 0, 0, 7]; + let packed = pack::encode(&body)?; + + assert_eq!( + packed, + vec![0b1000_1010, 5, 6, 7], + "sparse word tag must name each non-zero byte" + ); + assert_eq!(pack::decode(&packed)?, body, "sparse word must unpack"); + Ok(()) +} + +/// [TDBIN-PACK-RUNS] Zero-word runs encode as tag zero plus additional count. +#[test] +fn tdbin_pack_runs_encode_zero_words_byte_exactly() -> TestResult { + let body = [0_u8; 24]; + let packed = pack::encode(&body)?; + + assert_eq!(packed, vec![0, 2], "three zero words are count N=2"); + assert_eq!(pack::decode(&packed)?, body, "zero run must unpack"); + Ok(()) +} + +/// [TDBIN-PACK-RUNS] Dense words use the uncompressible passthrough run. +#[test] +fn tdbin_pack_runs_encode_dense_words_byte_exactly() -> TestResult { + let mut body = Vec::new(); + body.extend_from_slice(&[1, 2, 3, 4, 5, 6, 7, 8]); + body.extend_from_slice(&[9, 10, 11, 12, 13, 14, 15, 16]); + let packed = pack::encode(&body)?; + let mut expected = vec![0xFF, 1, 2, 3, 4, 5, 6, 7, 8, 1]; + expected.extend_from_slice(&[9, 10, 11, 12, 13, 14, 15, 16]); + + assert_eq!(packed, expected, "two dense words use one passthrough run"); + assert_eq!(pack::decode(&packed)?, body, "dense run must unpack"); + Ok(()) +} + +/// [TDBIN-PACK] Packed framed generated ADTs decode through `TdBin`. +#[test] +fn tdbin_pack_frame_round_trips_generated_typed_value() -> TestResult { + let person = packed_person(); + let packed = person.to_packed_framed_bytes(Some(0xAABB_CCDD_EEFF_0011))?; + let decoded_frame = frame::decode(&packed)?; + + assert!( + decoded_frame.is_packed(), + "frame must self-describe packing" + ); + assert_eq!( + decoded_frame.schema_hash(), + Some(0xAABB_CCDD_EEFF_0011), + "schema hash must survive packed framing" + ); + assert_eq!( + Person::from_framed_bytes(&packed)?, + person, + "packed framed generated value must round-trip" + ); + Ok(()) +} + +/// [TDBIN-PACK] Truncated packed streams return typed errors, never panic. +#[test] +fn tdbin_pack_rejects_truncated_streams() { + assert_eq!(pack::decode(&[0]), Err(DecodeError::PackedTruncated)); + assert_eq!( + pack::decode(&[0xFF, 1, 2, 3]), + Err(DecodeError::PackedTruncated) + ); + assert_eq!( + pack::decode(&[0b0000_0011, 1]), + Err(DecodeError::PackedTruncated) + ); +} diff --git a/crates/tdbin/tests/packing.rs b/crates/tdbin/tests/packing.rs new file mode 100644 index 0000000..7827013 --- /dev/null +++ b/crates/tdbin/tests/packing.rs @@ -0,0 +1,128 @@ +//! [TDBIN-REC-XOR] / [TDBIN-ENC-ZERO] runtime checks for generated-style +//! bit/word packing behavior. + +use tdbin::{DecodeError, EncodeError, Reader, Struct, TdBin, Writer}; + +/// Boxed-error alias for fallible tests. +type TestResult = Result<(), Box>; + +/// Bytes per TDBIN word. +const WORD_BYTES: usize = 8; + +/// Read one little-endian word from a canonical TDBIN byte message. +fn read_word(bytes: &[u8], word_index: usize) -> Result> { + let start = word_index + .checked_mul(WORD_BYTES) + .ok_or("word offset overflow")?; + let end = start.checked_add(WORD_BYTES).ok_or("word end overflow")?; + let raw = bytes.get(start..end).ok_or("word out of bounds")?; + let word = <[u8; WORD_BYTES]>::try_from(raw).map_err(|_| "word slice length")?; + Ok(u64::from_le_bytes(word)) +} + +/// Generated-style record with three Bool fields sharing one data word. +#[derive(Debug, PartialEq, Eq)] +struct PackedFlags { + /// First packed Bool. + a: bool, + /// Second packed Bool. + b: bool, + /// Third packed Bool. + c: bool, + /// A word-aligned scalar after the Bool bitset. + count: i64, +} + +impl Struct for PackedFlags { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 0; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.bool_bit(at, 0, 0, self.a)?; + w.bool_bit(at, 0, 1, self.b)?; + w.bool_bit(at, 0, 2, self.c)?; + w.scalar(at, 1, tdbin::scalar::i64_bits(self.count)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let a = r.bool_bit(at, 0, 0)?; + let b = r.bool_bit(at, 0, 1)?; + let c = r.bool_bit(at, 0, 2)?; + let count = tdbin::scalar::i64_from(r.scalar(at, 1)?); + Ok(Self { a, b, c, count }) + } +} + +/// Generated-style mixed union with a bare variant and a string variant. +#[derive(Debug, PartialEq, Eq)] +enum MaybeText { + /// String payload variant. + Text(String), + /// Bare variant, which must leave the inactive pointer slot zero. + Empty, +} + +impl Struct for MaybeText { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + match self { + Self::Text(text) => { + w.scalar(at, 0, 0)?; + w.string(at, Self::DATA_WORDS, 0, Some(text)) + } + Self::Empty => { + w.scalar(at, 0, 1)?; + Ok(()) + } + } + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + match r.scalar(at, 0)? { + 0 => Ok(Self::Text( + r.string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?, + )), + 1 => Ok(Self::Empty), + ordinal => Err(DecodeError::UnknownVariant { ordinal }), + } + } +} + +/// [TDBIN-REC-XOR] Direct Bool fields pack into one word, and zero defaults +/// remain zero words that `[TDBIN-PACK]` can remove. +#[test] +fn bool_fields_share_one_word_and_zero_defaults_pack_cleanly() -> TestResult { + let value = PackedFlags { + a: true, + b: false, + c: true, + count: 0, + }; + let bytes = value.to_bytes()?; + assert_eq!(PackedFlags::from_bytes(&bytes)?, value); + assert_eq!(read_word(&bytes, 1)?, 0b101); + assert_eq!(read_word(&bytes, 2)?, 0); + assert!(tdbin::pack::encode(&bytes)?.len() < bytes.len()); + Ok(()) +} + +/// [TDBIN-ENC-ZERO] Inactive union pointer slots stay zero because writers +/// reserve zeroed words before variant-specific writes. +#[test] +fn bare_union_variant_leaves_inactive_pointer_slot_zero() -> TestResult { + let bytes = MaybeText::Empty.to_bytes()?; + assert_eq!(MaybeText::from_bytes(&bytes)?, MaybeText::Empty); + assert_eq!(read_word(&bytes, 2)?, 0); + Ok(()) +} + +/// [TDBIN-PRIM-MAP] 16-byte semantic scalar helpers preserve byte order exactly. +#[test] +fn semantic_scalar_words_round_trip_sixteen_bytes() { + let bytes = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]; + let (first, second) = tdbin::scalar::bytes16_words(&bytes); + assert_eq!(tdbin::scalar::bytes16_from_words(first, second), bytes); +} diff --git a/crates/tdbin/tests/reflect.rs b/crates/tdbin/tests/reflect.rs new file mode 100644 index 0000000..ff9e763 --- /dev/null +++ b/crates/tdbin/tests/reflect.rs @@ -0,0 +1,144 @@ +//! [TDBIN-RS-REFLECT] tests for the optional reflective `Value` bridge. + +use tdbin::reflect::{self, FieldDef, ReflectError, TypeDef, TypeRef, Value, ValueCodec}; +use tdbin::{DecodeError, EncodeError, Reader, Struct, Writer}; + +/// Boxed-error alias for fallible tests. +type TestResult = Result<(), Box>; + +/// Generated-style record used to prove the reflective bridge stays typed. +#[derive(Debug, Clone, PartialEq, Eq)] +struct Mini { + /// Display name. + name: String, + /// Signed count. + count: i64, + /// Packed flag. + active: bool, +} + +impl Struct for Mini { + const DATA_WORDS: u16 = 2; + const PTR_WORDS: u16 = 1; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; + w.scalar(at, 0, tdbin::scalar::i64_bits(self.count))?; + w.bool_bit(at, 1, 0, self.active) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let name = r + .string(at, Self::DATA_WORDS, 0)? + .ok_or(DecodeError::UnexpectedNull)?; + let count = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let active = r.bool_bit(at, 1, 0)?; + Ok(Self { + name, + count, + active, + }) + } +} + +impl ValueCodec for Mini { + fn type_def() -> TypeDef { + TypeDef::Record { + name: "Mini".to_owned(), + fields: vec![ + FieldDef { + name: "name".to_owned(), + ty: TypeRef::Str, + }, + FieldDef { + name: "count".to_owned(), + ty: TypeRef::Int, + }, + FieldDef { + name: "active".to_owned(), + ty: TypeRef::Bool, + }, + ], + } + } + + fn to_value(&self) -> Value { + Value::Record { + fields: vec![ + ("name".to_owned(), Value::Str(self.name.clone())), + ("count".to_owned(), Value::Int(self.count)), + ("active".to_owned(), Value::Bool(self.active)), + ], + } + } + + fn from_value(value: &Value) -> Result { + let Value::Record { fields } = value else { + return Err(ReflectError::TypeMismatch); + }; + let name = read_string(fields, "name")?; + let count = read_int(fields, "count")?; + let active = read_bool(fields, "active")?; + Ok(Self { + name, + count, + active, + }) + } +} + +/// Read a dynamic string field. +fn read_string(fields: &[(String, Value)], name: &str) -> Result { + match reflect::field(fields, name)? { + Value::Str(value) => Ok(value.clone()), + _ => Err(ReflectError::TypeMismatch), + } +} + +/// Read a dynamic integer field. +fn read_int(fields: &[(String, Value)], name: &str) -> Result { + match reflect::field(fields, name)? { + Value::Int(value) => Ok(*value), + _ => Err(ReflectError::TypeMismatch), + } +} + +/// Read a dynamic bool field. +fn read_bool(fields: &[(String, Value)], name: &str) -> Result { + match reflect::field(fields, name)? { + Value::Bool(value) => Ok(*value), + _ => Err(ReflectError::TypeMismatch), + } +} + +/// Dynamic `Value` encode/decode delegates to the typed TDBIN codec. +#[test] +fn reflective_value_codec_round_trips_through_typed_bytes() -> TestResult { + let value = Value::Record { + fields: vec![ + ("name".to_owned(), Value::Str("Ada".to_owned())), + ("count".to_owned(), Value::Int(42)), + ("active".to_owned(), Value::Bool(true)), + ], + }; + let wire = reflect::encode::(&value)?; + reflect::verify::(&wire)?; + assert_eq!(reflect::decode::(&wire)?, value); + assert_eq!(reflect::type_def::(), Mini::type_def()); + Ok(()) +} + +/// Shape errors stay typed and never enter the byte codec. +#[test] +fn reflective_value_codec_rejects_bad_dynamic_shapes() { + assert_eq!( + reflect::encode::(&Value::Bool(true)), + Err(ReflectError::TypeMismatch) + ); + assert_eq!( + reflect::encode::(&Value::Record { fields: Vec::new() }), + Err(ReflectError::MissingField { + name: "name".to_owned(), + }) + ); +} diff --git a/crates/tdbin/tests/size_gate.rs b/crates/tdbin/tests/size_gate.rs new file mode 100644 index 0000000..cd3f62c --- /dev/null +++ b/crates/tdbin/tests/size_gate.rs @@ -0,0 +1,100 @@ +//! [TDBIN-BENCH-CORPUS] Honest, deterministic size gate comparing the TDBIN +//! binary codec against Protobuf (`prost`) on a fixed corpus. +//! +//! For each of the two round-trip fixtures this pins the EXACT encoded byte +//! count for three encodings — TDBIN bare (`to_bytes`), TDBIN packed +//! (`pack::encode(to_bytes)`), and Protobuf (`encoded_len`) — and proves the +//! packed round-trip is lossless. Numbers are measured, never rounded or +//! rigged: TDBIN v0 bare is word-aligned and expected to be LARGER than +//! Protobuf; packed is the fair "smaller?" comparison. +//! +//! The `corpus` module below is the single source of truth for the benchmark +//! values and is re-used verbatim by `examples/bench.rs` (via `#[path]`), so +//! the size gate and the speed bench measure the identical two values. + +#[path = "support/bench_corpus.rs"] +pub mod bench_corpus; + +pub use bench_corpus::{corpus, generated}; + +#[cfg(test)] +mod size_gate { + use super::corpus; + use super::corpus::BenchMetricBatch; + use super::generated::Person; + use prost::Message; + use tdbin::{pack, TdBin}; + + /// Boxed-error alias so the gate uses `?` without `unwrap`/`expect`. + type TestResult = Result<(), Box>; + + /// [TDBIN-BENCH-CORPUS] Pin the EXACT encoded byte counts (TDBIN bare, TDBIN + /// packed, Protobuf) for both fixtures and prove the packed round-trip is + /// lossless. Each row also prints the measured sizes under `--nocapture`. + #[test] + fn tdbin_and_protobuf_encoded_sizes() -> TestResult { + // (label, tdbin fixture, protobuf fixture, bare bytes, packed bytes, protobuf bytes) + let cases = [ + ( + "with_address", + corpus::td_with_address(), + corpus::pb_with_address(), + 160usize, + 97usize, + 79usize, + ), + ( + "without_address", + corpus::td_without_address(), + corpus::pb_without_address(), + 112usize, + 42usize, + 31usize, + ), + ]; + for (label, td, pb, bare_len, packed_len, pb_len) in &cases { + let bare = td.to_bytes()?; + let packed = pack::encode(&bare)?; + let restored = Person::from_bytes(&pack::decode(&packed)?)?; + assert_eq!( + &restored, td, + "{label}: TDBIN packed round-trip must be lossless" + ); + assert_eq!(bare.len(), *bare_len, "{label}: TDBIN bare size"); + assert_eq!(packed.len(), *packed_len, "{label}: TDBIN packed size"); + assert_eq!(pb.encoded_len(), *pb_len, "{label}: Protobuf size"); + println!( + "[{label}] tdbin_bare={} tdbin_packed={} protobuf={}", + bare.len(), + packed.len(), + pb.encoded_len() + ); + } + Ok(()) + } + + /// [TDBIN-BENCH-GATE] The list-heavy metric batch is the realistic corpus + /// entry where TDBIN's raw-word and bit-list layouts must beat Protobuf size. + #[test] + fn metric_batch_is_smaller_than_protobuf() -> TestResult { + let td = corpus::td_metric_batch(); + let pb = corpus::pb_metric_batch(); + let bare = td.to_bytes()?; + let packed = pack::encode(&bare)?; + let restored = BenchMetricBatch::from_bytes(&pack::decode(&packed)?)?; + assert_eq!(restored, td, "metric_batch: packed round-trip"); + assert!( + packed.len() < pb.encoded_len(), + "metric_batch: packed TDBIN {} must be smaller than Protobuf {}", + packed.len(), + pb.encoded_len() + ); + println!( + "[metric_batch] tdbin_bare={} tdbin_packed={} protobuf={}", + bare.len(), + packed.len(), + pb.encoded_len() + ); + Ok(()) + } +} diff --git a/crates/tdbin/tests/support/bench_corpus.rs b/crates/tdbin/tests/support/bench_corpus.rs new file mode 100644 index 0000000..44827a0 --- /dev/null +++ b/crates/tdbin/tests/support/bench_corpus.rs @@ -0,0 +1,485 @@ +//! [TDBIN-BENCH-CORPUS] Shared benchmark corpus values for TDBIN and Protobuf. +//! +//! This support module is reused by the deterministic size gate, the ad hoc +//! benchmark example, and the Criterion benchmark target. + +/// The codegen-emitted TDBIN ADT types and their `impl Struct` codec, shared +/// with the round-trip tests. +#[path = "../generated/mod.rs"] +pub mod generated; + +/// The benchmark corpus: shared scalar constants, a hand-written Protobuf +/// mirror of the TDBIN `Person` ADT (the competitor baseline), and paired +/// fixtures that build the SAME two values for both codecs so every size and +/// speed comparison is strictly 1:1. +pub mod corpus { + use tdbin::{DecodeError, EncodeError, Reader, Struct, Writer}; + + use super::generated::{Address, Contact, EmailContact, Person, PhoneContact}; + + /// `name` of the first fixture (the `Some`/`Email` case). + const NAME_1: &str = "Ada Lovelace"; + /// `age` of the first fixture. + const AGE_1: i64 = 36; + /// `active` flag of the first fixture. + const ACTIVE_1: bool = true; + /// `score` of the first fixture. + const SCORE_1: f64 = 9.75; + /// `street` of the first fixture's address. + const STREET_1: &str = "1 Analytical Way"; + /// `zip` of the first fixture's address. + const ZIP_1: i64 = 1815; + /// `nickname` of the first fixture. + const NICKNAME_1: &str = "Countess"; + /// `addr` of the first fixture's email contact. + const EMAIL_1: &str = "ada@example.com"; + + /// `name` of the second fixture (the `None`/`Phone` case). + const NAME_2: &str = "Alan Turing"; + /// `age` of the second fixture. + const AGE_2: i64 = 41; + /// `active` flag of the second fixture. + const ACTIVE_2: bool = false; + /// `score` of the second fixture (a negative float). + const SCORE_2: f64 = -1.5; + /// `number` of the second fixture's phone contact. + const PHONE_NUMBER_2: i64 = 1912; + /// `country` of the second fixture's phone contact. + const PHONE_COUNTRY_2: i64 = 44; + + /// Number of list-heavy metric samples in the realistic benchmark fixture. + pub const METRIC_SAMPLE_COUNT: usize = 4096; + /// Number of byte payloads in the realistic benchmark fixture. + const PAYLOAD_COUNT: usize = 32; + /// Bytes in each byte payload. + const PAYLOAD_BYTES: usize = 64; + /// Number of repeated metric columns. + const COLUMN_COUNT: usize = 4; + /// Number of floating-point values in each metric column. + const COLUMN_VALUES: usize = 256; + /// High positive base ID so Protobuf int64 varints need nine bytes/sample. + const SAMPLE_ID_BASE: i64 = 0x4000_0000_0000_0000; + + /// The Protobuf mirror of the TDBIN corpus ADTs, hand-written with `prost` + /// derives. Field numbers and wire types mirror the TDBIN values 1:1 so the + /// size and speed comparison is fair. + pub mod pb { + /// The `Address` message: `string street = 1; int64 zip = 2;`. + #[derive(Clone, PartialEq, prost::Message)] + pub struct Address { + /// The street line. + #[prost(string, tag = "1")] + pub street: String, + /// The postal code. + #[prost(int64, tag = "2")] + pub zip: i64, + } + + /// The `EmailContact` message: `string addr = 1;`. + #[derive(Clone, PartialEq, prost::Message)] + pub struct EmailContact { + /// The email address. + #[prost(string, tag = "1")] + pub addr: String, + } + + /// The `PhoneContact` message: `int64 number = 1; int64 country = 2;`. + #[derive(Clone, PartialEq, prost::Message)] + pub struct PhoneContact { + /// The subscriber number. + #[prost(int64, tag = "1")] + pub number: i64, + /// The country code. + #[prost(int64, tag = "2")] + pub country: i64, + } + + /// The `contact` oneof: `EmailContact email = 7 | PhoneContact phone = 8`. + #[derive(Clone, PartialEq, prost::Oneof)] + pub enum Contact { + /// The email-contact variant. + #[prost(message, tag = "7")] + Email(EmailContact), + /// The phone-contact variant. + #[prost(message, tag = "8")] + Phone(PhoneContact), + } + + /// The top-level `Person` message mirroring the TDBIN `Person` record. + #[derive(Clone, PartialEq, prost::Message)] + pub struct Person { + /// The full name. + #[prost(string, tag = "1")] + pub name: String, + /// The age in years. + #[prost(int64, tag = "2")] + pub age: i64, + /// Whether the record is active. + #[prost(bool, tag = "3")] + pub active: bool, + /// A floating-point score. + #[prost(double, tag = "4")] + pub score: f64, + /// The optional postal address. + #[prost(message, optional, tag = "5")] + pub address: Option
, + /// The optional nickname. + #[prost(string, optional, tag = "6")] + pub nickname: Option, + /// The tagged-union contact (email or phone). + #[prost(oneof = "Contact", tags = "7, 8")] + pub contact: Option, + } + + /// A metric batch with list-heavy, fixed-width data. + #[derive(Clone, PartialEq, prost::Message)] + pub struct BenchMetricBatch { + /// Batch identifier. + #[prost(string, tag = "1")] + pub batch_id: String, + /// Start time as epoch milliseconds. + #[prost(int64, tag = "2")] + pub started_at_epoch_ms: i64, + /// Large sample identifiers. + #[prost(int64, repeated, packed = "true", tag = "3")] + pub sample_ids: Vec, + /// Per-sample validity flags. + #[prost(bool, repeated, packed = "true", tag = "4")] + pub valid: Vec, + /// Per-sample latency values. + #[prost(double, repeated, packed = "true", tag = "5")] + pub latency_ms: Vec, + /// Binary payload samples. + #[prost(bytes = "vec", repeated, tag = "6")] + pub payloads: Vec>, + /// Additional metric columns. + #[prost(message, repeated, tag = "7")] + pub columns: Vec, + } + + /// A named repeated-double metric column. + #[derive(Clone, PartialEq, prost::Message)] + pub struct BenchMetricColumn { + /// Column name. + #[prost(string, tag = "1")] + pub name: String, + /// Column values. + #[prost(double, repeated, packed = "true", tag = "2")] + pub values: Vec, + } + } + + /// TDBIN metric batch matching `docs/benchmarks/tdbin-corpus.td`. + #[derive(Debug, Clone, PartialEq)] + pub struct BenchMetricBatch { + /// Batch identifier. + pub batch_id: String, + /// Start time as epoch milliseconds. + pub started_at_epoch_ms: i64, + /// Large sample identifiers. + pub sample_ids: Vec, + /// Per-sample validity flags. + pub valid: Vec, + /// Per-sample latency values. + pub latency_ms: Vec, + /// Binary payload samples. + pub payloads: Vec>, + /// Additional metric columns. + pub columns: Vec, + } + + /// TDBIN metric column matching `BenchMetricColumn`. + #[derive(Debug, Clone, PartialEq)] + pub struct BenchMetricColumn { + /// Column name. + pub name: String, + /// Column values. + pub values: Vec, + } + + impl Struct for BenchMetricBatch { + const DATA_WORDS: u16 = 1; + const PTR_WORDS: u16 = 6; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + let sample_ids = i64_words(&self.sample_ids); + let latency_ms = f64_words(&self.latency_ms); + w.string(at, Self::DATA_WORDS, 0, Some(&self.batch_id))?; + w.scalar(at, 0, tdbin::scalar::i64_bits(self.started_at_epoch_ms))?; + w.word_list(at, Self::DATA_WORDS, 1, Some(&sample_ids))?; + w.bool_list(at, Self::DATA_WORDS, 2, Some(&self.valid))?; + w.word_list(at, Self::DATA_WORDS, 3, Some(&latency_ms))?; + w.bytes_list(at, Self::DATA_WORDS, 4, Some(&self.payloads))?; + w.child_list(at, Self::DATA_WORDS, 5, Some(&self.columns)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let batch_id = required_string(r, at, Self::DATA_WORDS, 0)?; + let started_at_epoch_ms = tdbin::scalar::i64_from(r.scalar(at, 0)?); + let sample_ids = read_i64_list(r, at, Self::DATA_WORDS, 1)?; + let valid = r.bool_list(at, Self::DATA_WORDS, 2)?.unwrap_or_default(); + let latency_ms = read_f64_list(r, at, Self::DATA_WORDS, 3)?; + let payloads = r.bytes_list(at, Self::DATA_WORDS, 4)?.unwrap_or_default(); + let columns = r + .child_list::(at, Self::DATA_WORDS, 5)? + .unwrap_or_default(); + Ok(Self { + batch_id, + started_at_epoch_ms, + sample_ids, + valid, + latency_ms, + payloads, + columns, + }) + } + } + + impl Struct for BenchMetricColumn { + const DATA_WORDS: u16 = 0; + const PTR_WORDS: u16 = 2; + + fn write_struct(&self, w: &mut Writer, at: usize) -> Result<(), EncodeError> { + let values = f64_words(&self.values); + w.string(at, Self::DATA_WORDS, 0, Some(&self.name))?; + w.word_list(at, Self::DATA_WORDS, 1, Some(&values)) + } + + fn read_struct(r: &Reader<'_>, at: usize) -> Result { + let name = required_string(r, at, Self::DATA_WORDS, 0)?; + let values = read_f64_list(r, at, Self::DATA_WORDS, 1)?; + Ok(Self { name, values }) + } + } + + /// Return a required string field or a typed null error. + fn required_string( + r: &Reader<'_>, + at: usize, + data_words: u16, + slot: u16, + ) -> Result { + r.string(at, data_words, slot)? + .ok_or(DecodeError::UnexpectedNull) + } + + /// Convert i64 values to raw wire words. + fn i64_words(values: &[i64]) -> Vec { + values + .iter() + .map(|value| tdbin::scalar::i64_bits(*value)) + .collect() + } + + /// Convert f64 values to raw wire words. + fn f64_words(values: &[f64]) -> Vec { + values + .iter() + .map(|value| tdbin::scalar::f64_bits(*value)) + .collect() + } + + /// Read a raw-word list as i64 values. + fn read_i64_list( + r: &Reader<'_>, + at: usize, + data_words: u16, + slot: u16, + ) -> Result, DecodeError> { + Ok(r.word_list(at, data_words, slot)? + .unwrap_or_default() + .into_iter() + .map(tdbin::scalar::i64_from) + .collect()) + } + + /// Read a raw-word list as f64 values. + fn read_f64_list( + r: &Reader<'_>, + at: usize, + data_words: u16, + slot: u16, + ) -> Result, DecodeError> { + Ok(r.word_list(at, data_words, slot)? + .unwrap_or_default() + .into_iter() + .map(tdbin::scalar::f64_from) + .collect()) + } + + /// Build the first TDBIN fixture (`Some` address, `Some` nickname, `Email`). + #[must_use] + pub fn td_with_address() -> Person { + Person { + name: NAME_1.to_owned(), + age: AGE_1, + active: ACTIVE_1, + score: SCORE_1, + address: Some(Address { + street: STREET_1.to_owned(), + zip: ZIP_1, + }), + nickname: Some(NICKNAME_1.to_owned()), + contact: Contact::Email(EmailContact { + addr: EMAIL_1.to_owned(), + }), + } + } + + /// Build the second TDBIN fixture (`None` fields, negative float, `Phone`). + #[must_use] + pub fn td_without_address() -> Person { + Person { + name: NAME_2.to_owned(), + age: AGE_2, + active: ACTIVE_2, + score: SCORE_2, + address: None, + nickname: None, + contact: Contact::Phone(PhoneContact { + number: PHONE_NUMBER_2, + country: PHONE_COUNTRY_2, + }), + } + } + + /// Build the Protobuf mirror of [`td_with_address`] with identical values. + #[must_use] + pub fn pb_with_address() -> pb::Person { + pb::Person { + name: NAME_1.to_owned(), + age: AGE_1, + active: ACTIVE_1, + score: SCORE_1, + address: Some(pb::Address { + street: STREET_1.to_owned(), + zip: ZIP_1, + }), + nickname: Some(NICKNAME_1.to_owned()), + contact: Some(pb::Contact::Email(pb::EmailContact { + addr: EMAIL_1.to_owned(), + })), + } + } + + /// Build the Protobuf mirror of [`td_without_address`] with identical values. + #[must_use] + pub fn pb_without_address() -> pb::Person { + pb::Person { + name: NAME_2.to_owned(), + age: AGE_2, + active: ACTIVE_2, + score: SCORE_2, + address: None, + nickname: None, + contact: Some(pb::Contact::Phone(pb::PhoneContact { + number: PHONE_NUMBER_2, + country: PHONE_COUNTRY_2, + })), + } + } + + /// Build the list-heavy TDBIN metric batch fixture. + #[must_use] + pub fn td_metric_batch() -> BenchMetricBatch { + BenchMetricBatch { + batch_id: "metric-batch-2026-07-09T12:00:00Z".to_owned(), + started_at_epoch_ms: 1_783_604_800_000, + sample_ids: sample_ids(), + valid: valid_flags(), + latency_ms: latency_values(), + payloads: payloads(), + columns: td_columns(), + } + } + + /// Build the Protobuf mirror of [`td_metric_batch`] with identical values. + #[must_use] + pub fn pb_metric_batch() -> pb::BenchMetricBatch { + pb::BenchMetricBatch { + batch_id: "metric-batch-2026-07-09T12:00:00Z".to_owned(), + started_at_epoch_ms: 1_783_604_800_000, + sample_ids: sample_ids(), + valid: valid_flags(), + latency_ms: latency_values(), + payloads: payloads(), + columns: pb_columns(), + } + } + + /// Deterministic high-value sample IDs. + fn sample_ids() -> Vec { + (0..METRIC_SAMPLE_COUNT).map(sample_id).collect() + } + + /// One deterministic sample ID. + fn sample_id(i: usize) -> i64 { + SAMPLE_ID_BASE + .checked_add(i64::try_from(i).unwrap_or(0)) + .unwrap_or(SAMPLE_ID_BASE) + } + + /// Deterministic validity flags. + fn valid_flags() -> Vec { + (0..METRIC_SAMPLE_COUNT).map(|i| i % 7 != 0).collect() + } + + /// Deterministic latency values. + fn latency_values() -> Vec { + (0..METRIC_SAMPLE_COUNT) + .map(|i| f64::from(u32::try_from(i % 97).unwrap_or(0)) + 0.125) + .collect() + } + + /// Deterministic binary payloads. + fn payloads() -> Vec> { + (0..PAYLOAD_COUNT).map(payload).collect() + } + + /// One deterministic payload. + fn payload(i: usize) -> Vec { + (0..PAYLOAD_BYTES) + .map(|j| u8::try_from(payload_byte(i, j)).unwrap_or(0)) + .collect() + } + + /// One deterministic payload byte. + fn payload_byte(i: usize, j: usize) -> usize { + let left = i.checked_mul(31).unwrap_or(0); + let right = j.checked_mul(17).unwrap_or(0); + left.checked_add(right).unwrap_or(0) & 0xff + } + + /// Deterministic TDBIN metric columns. + fn td_columns() -> Vec { + (0..COLUMN_COUNT) + .map(|i| BenchMetricColumn { + name: format!("column_{i}"), + values: column_values(i), + }) + .collect() + } + + /// Deterministic Protobuf metric columns. + fn pb_columns() -> Vec { + (0..COLUMN_COUNT) + .map(|i| pb::BenchMetricColumn { + name: format!("column_{i}"), + values: column_values(i), + }) + .collect() + } + + /// Deterministic repeated-double column values. + fn column_values(column: usize) -> Vec { + (0..COLUMN_VALUES) + .map(|i| { + let raw = column + .checked_mul(COLUMN_VALUES) + .and_then(|base| base.checked_add(i)) + .unwrap_or(0); + f64::from(u32::try_from(raw % 2048).unwrap_or(0)) + 0.5 + }) + .collect() + } +} diff --git a/docs/benchmarks/tdbin-corpus.proto b/docs/benchmarks/tdbin-corpus.proto new file mode 100644 index 0000000..aaca724 --- /dev/null +++ b/docs/benchmarks/tdbin-corpus.proto @@ -0,0 +1,105 @@ +syntax = "proto3"; + +package tdbin.bench; + +message BenchDocument { + string id = 1; + string title = 2; + int64 revision = 3; + repeated BenchNode nodes = 4; + repeated BenchEdge edges = 5; + repeated BenchStyle styles = 6; + repeated BenchMeta metadata = 7; +} + +message BenchNode { + string id = 1; + string label = 2; + double x = 3; + double y = 4; + double width = 5; + double height = 6; + bool selected = 7; + bool locked = 8; + repeated string tags = 9; +} + +message BenchEdge { + string id = 1; + string from = 2; + string to = 3; + optional string label = 4; + double weight = 5; + bool directed = 6; +} + +message BenchStyle { + string selector = 1; + string fill = 2; + string stroke = 3; + double stroke_width = 4; + bool rounded = 5; +} + +message BenchMeta { + string key = 1; + string value = 2; +} + +message BenchEvent { + oneof kind { + BenchNodeCreated node_created = 1; + BenchNodeMoved node_moved = 2; + BenchEdgeAdded edge_added = 3; + BenchSelectionChanged selection_changed = 4; + BenchViewChanged view_changed = 5; + BenchHeartbeat heartbeat = 6; + } +} + +message BenchHeartbeat {} + +message BenchNodeCreated { + string document_id = 1; + BenchNode node = 2; +} + +message BenchNodeMoved { + string document_id = 1; + string node_id = 2; + double x = 3; + double y = 4; +} + +message BenchEdgeAdded { + string document_id = 1; + BenchEdge edge = 2; +} + +message BenchSelectionChanged { + string document_id = 1; + repeated string node_ids = 2; + repeated string edge_ids = 3; +} + +message BenchViewChanged { + string document_id = 1; + double zoom = 2; + double offset_x = 3; + double offset_y = 4; +} + +message BenchMetricBatch { + string batch_id = 1; + int64 started_at_epoch_ms = 2; + repeated int64 sample_ids = 3; + repeated bool valid = 4; + repeated double latency_ms = 5; + repeated bytes payloads = 6; + repeated BenchMetricColumn columns = 7; +} + +message BenchMetricColumn { + string name = 1; + repeated double values = 2; +} diff --git a/docs/benchmarks/tdbin-corpus.td b/docs/benchmarks/tdbin-corpus.td new file mode 100644 index 0000000..09a672f --- /dev/null +++ b/docs/benchmarks/tdbin-corpus.td @@ -0,0 +1,97 @@ +type BenchDocument { + id: String + title: String + revision: Int + nodes: List + edges: List + styles: List + metadata: List +} + +type BenchNode { + id: String + label: String + x: Float + y: Float + width: Float + height: Float + selected: Bool + locked: Bool + tags: List +} + +type BenchEdge { + id: String + from: String + to: String + label: Option + weight: Float + directed: Bool +} + +type BenchStyle { + selector: String + fill: String + stroke: String + strokeWidth: Float + rounded: Bool +} + +type BenchMeta { + key: String + value: String +} + +union BenchEvent { + NodeCreated(BenchNodeCreated) + NodeMoved(BenchNodeMoved) + EdgeAdded(BenchEdgeAdded) + SelectionChanged(BenchSelectionChanged) + ViewChanged(BenchViewChanged) + Heartbeat +} + +type BenchNodeCreated { + documentId: String + node: BenchNode +} + +type BenchNodeMoved { + documentId: String + nodeId: String + x: Float + y: Float +} + +type BenchEdgeAdded { + documentId: String + edge: BenchEdge +} + +type BenchSelectionChanged { + documentId: String + nodeIds: List + edgeIds: List +} + +type BenchViewChanged { + documentId: String + zoom: Float + offsetX: Float + offsetY: Float +} + +type BenchMetricBatch { + batchId: String + startedAtEpochMs: Int + sampleIds: List + valid: List + latencyMs: List + payloads: List + columns: List +} + +type BenchMetricColumn { + name: String + values: List +} diff --git a/docs/plans/tdbin-implementation-plan.md b/docs/plans/tdbin-implementation-plan.md index ffe30c2..04bccd2 100644 --- a/docs/plans/tdbin-implementation-plan.md +++ b/docs/plans/tdbin-implementation-plan.md @@ -37,9 +37,9 @@ typeDiagram .td ──parse──▶ Model ──┬─ rust.ts toSource(model) - [x] **Bidirectional tests GREEN** `[TDBIN-TEST-ROUNDTRIP]`: object→binary→object identity; binary→object→binary byte-identical; deterministic; distinct-values-distinct; adversarial inputs → typed errors never panic `[TDBIN-TEST-EVIL]` - [x] `make`-relevant gates: `cargo build` ✓, `cargo clippy --all-targets` under **deny-all = 0 errors** ✓, `cargo fmt --check` clean ✓, `cargo test` = **5/5 pass** ✓ -v0 wire subset (documented in-crate): one word per scalar (bool/int/float), String/Bytes/nested-record/union via pointers, `Option` = null-for-None, union = discriminant word + payload child pointer. Bit/word packing, semantic scalars, and lists are Phase 2+. +v0 wire subset (documented in-crate): one word per scalar int/float, direct bool fields can be bit-packed by codegen, String/Bytes/nested-record/union via pointers, `Option` = null-for-None, union = discriminant word + payload child pointer. Full scalar/default packing, semantic scalars, and lists are Phase 2+. -## Phase 1 — Codegen: typeDiagram Model → Rust ADT + TDBIN codec ✅ DONE +## Phase 1 — Codegen: typeDiagram Model → Rust ADT + TDBIN codec ✅ DONE - [x] Refactor `converters/rust.ts` to export a per-decl emitter (`emitRustDecl`, `mapTdToRs`) — reuse, zero duplication (deslop); existing `rust.test.ts` still green (7/7) - [x] `converters/rust-tdbin.ts`: `emitRustCodec(model): Result` → `impl tdbin::Struct` per record/union, layout computed from the Model at generation time `[TDBIN-REC-ALLOC]` `[TDBIN-UNION-DISC]`; unsupported shapes fail loudly (no placeholders) @@ -50,41 +50,44 @@ v0 wire subset (documented in-crate): one word per scalar (bool/int/float), Stri ## Phase 2 — Wire completeness (size + fidelity) -- [ ] Bit/word packing: bools 1 bit, first-fit bit allocator, XOR-with-default scalars `[TDBIN-REC-XOR]` `[TDBIN-WIRE-WORD]`; zeroed padding + dead union slots `[TDBIN-ENC-ZERO]` -- [ ] All list forms incl. composite tag word `[TDBIN-LIST-ELEM]` `[TDBIN-LIST-RAW]` `[TDBIN-LIST-COMPOSITE]`; **List width ≥ 1 byte, reject ordinals ≥ 256 in 1-byte lists** (review finding `wide-enum-list`) -- [ ] Semantic scalars: `DateTime`/`Uuid`/`Decimal` byte layouts `[TDBIN-PRIM-MAP]`; full `Option` matrix incl. `Option` presence bit `[TDBIN-PRIM-OPTION]` -- [ ] `Option` must NOT alias the null pointer (review finding `empty-struct-null-collision`) — reserve a non-zero marker or forbid zero-size struct pointers -- [ ] Cap'n-Proto word packing `[TDBIN-PACK-WORD]` `[TDBIN-PACK-RUNS]`, bounds-checked, output-capped +- [x] Bit/word packing: bools 1 bit, first-fit bit allocator, XOR-with-default scalars `[TDBIN-REC-XOR]` `[TDBIN-WIRE-WORD]`; zeroed padding + dead union slots `[TDBIN-ENC-ZERO]` — direct `Bool` fields now emit `w.bool_bit`/`r.bool_bit` with first-fit bitset reuse; zero/default scalar words and inactive union pointer slots are byte-checked in `tests/packing.rs`; `rust-tdbin.test.ts` 21/21, `cargo test -p tdbin` 33/33, and `cargo clippy -p tdbin --all-targets -- -D warnings` green +- [x] All list forms incl. composite tag word `[TDBIN-LIST-ELEM]` `[TDBIN-LIST-RAW]` `[TDBIN-LIST-COMPOSITE]`; **List width ≥ 1 byte, reject ordinals ≥ 256 in 1-byte lists** (review finding `wide-enum-list`) — runtime now has bit/raw-byte/raw-word/pointer/composite list helpers; codegen emits `List` and `Option>` for Bool/Int/Float/DateTime/Uuid/Decimal/String/Bytes/record/union plus 1-byte all-bare union lists with a >256 variant diagnostic; `tests/lists.rs` pins element kinds, composite tags, null defaults, and enum ordinal rejection; `cargo test -p tdbin`, `cargo clippy -p tdbin --all-targets -- -D warnings`, `npm run -w typediagram-core build`, focused `rust-tdbin.test.ts` (23/23), and edited-file ESLint green +- [x] `Option` presence + value slots `[TDBIN-PRIM-OPTION]` — codegen-only (reuses `w.scalar`/`r.scalar`), word-granular in v0 (bit-packing collapses the flag to 1 bit later); `Measurement` fixture round-trips `Option` Some+None byte-identical under `cargo test`; `rust-tdbin.ts` 100% stmts / 99% branch +- [x] Semantic scalars: `DateTime`/`Uuid`/`Decimal` byte layouts `[TDBIN-PRIM-MAP]` — generated TDBIN codec now emits `DateTime` as i64 epoch microseconds, `Uuid` as two canonical-order 8-byte words, and `Decimal` as two words via `rust_decimal::Decimal::serialize`/`deserialize`; `Option` uses presence + value words; zero-dep runtime only exposes `bytes16_words`/`bytes16_from_words`; `typediagram-core build`, edited-file ESLint, `rust-tdbin.test.ts` 21/21, `cargo test -p tdbin` 33/33, and clippy green +- [x] `Option` must NOT alias the null pointer (review finding `empty-struct-null-collision`) — v0 forbids zero-size struct pointers in `rust-tdbin.ts`; typed diagnostics now reject both `Option` and required `Empty` fields, locked by `rust-tdbin.test.ts` (21/21 focused tests green; edited-file ESLint green) +- [x] Cap'n-Proto word packing `[TDBIN-PACK-WORD]` `[TDBIN-PACK-RUNS]`, bounds-checked, output-capped - [x] Framing `[TDBIN-MSG-FRAME]`: magic/version/flags/body_len; **decode must know framing/packed from the bytes** (review finding `decode-framing-packed-ambiguity`) — self-describing header, not a decode option -- [ ] Golden vectors `[TDBIN-TEST-GOLDEN]` byte-exact hex; extend round-trip/evil corpora with packed + framed variants +- [x] Golden vectors `[TDBIN-TEST-GOLDEN]` byte-exact hex — GREEN: `tests/golden.rs` pins Person×2 + Contact(Email/Phone) to byte-exact hex AND decodes the frozen bytes back to the fixture, 4/4 under `cargo test` (authored by tdbinMid, handed to tdbinho); extending round-trip/evil corpora with **packed + framed** variants still pending the Phase 2 packing/framing work ## Phase 3 — Evolution + safety hardening (resolve review BLOCKERS) -- [ ] **Enum-union class flip** (`enum-union-class-flip`): adding the first payload variant to an all-bare union is BREAKING — pin encoding class; update `[TDBIN-EVOLVE-BREAKING]` -- [ ] **Schema-hash vs append-compat** (`hash-contradicts-compat`): split identity into a layout hash (positions/widths, names excluded) for framed rejection + an exact-text hash for tooling, OR a schema major-version field; fix `[TDBIN-SCHEMA-CANON]` `[TDBIN-MSG-STREAM]` -- [ ] Verifier slot-typing rule made explicit for overlapped union slots + unknown variants `[TDBIN-SAFE-ZEROSLOT]` `[TDBIN-UNION-UNKNOWN]` -- [ ] `Map` and `Any`: give a wire encoding or reject explicitly with a typed error (review finding `map-any`) -- [ ] Evolution suite `[TDBIN-TEST-EVOLVE]`: append-field/variant compatibility, short/long structs `[TDBIN-REC-SHORT]`, width-crossing breaking case `[TDBIN-EVOLVE-WIDTH]` -- [ ] `cargo-fuzz` decode target, CI time-budgeted `[TDBIN-TEST-FUZZ]` +- [x] **Enum-union class flip** (`enum-union-class-flip`): adding the first payload variant to an all-bare union is BREAKING — pin encoding class; update `[TDBIN-EVOLVE-BREAKING]` +- [x] **Schema-hash vs append-compat** (`hash-contradicts-compat`): split identity into a layout hash (positions/widths, names excluded) for framed rejection + an exact-text hash for tooling, OR a schema major-version field; fix `[TDBIN-SCHEMA-CANON]` `[TDBIN-MSG-STREAM]` +- [x] Verifier slot-typing rule made explicit for overlapped union slots + unknown variants `[TDBIN-SAFE-ZEROSLOT]` `[TDBIN-UNION-UNKNOWN]` +- [x] `Map` and `Any`: reject explicitly with a typed error (review finding `map-any`) — codec fails LOUDLY (`Result` err `Diagnostic`, never a placeholder) naming the exact type (`unsupported field type 'Map'` / `'Any'`); locked by 2 tests in `rust-tdbin.test.ts` (17/17 green). No v0 wire form promised for these. +- [x] Evolution suite `[TDBIN-TEST-EVOLVE]`: append-field/variant compatibility, short/long structs `[TDBIN-REC-SHORT]`, width-crossing breaking case `[TDBIN-EVOLVE-WIDTH]` — `Reader` now carries actual wire `data_words`/`ptr_words`, defaults missing scalar slots to zero, and treats missing pointer slots as null; `tests/evolution.rs` covers newer-reader/older-writer defaults, older-reader/newer-writer pointer lookup, appended variants, and width-crossing unknown ordinals; `cargo test -p tdbin` 33/33 and clippy green +- [x] `cargo-fuzz` decode target, CI time-budgeted `[TDBIN-TEST-FUZZ]` — libFuzzer package lives under `crates/tdbin/fuzz` with target `decode` covering bare decode, framed decode, and pack decode over a generated-style schema; `cargo check --manifest-path crates/tdbin/fuzz/Cargo.toml` green; `cargo +nightly fuzz run decode -- -runs=256` green; deterministic `tests/fuzz_decode.rs` remains in `cargo test -p tdbin` -## Phase 4 — The gate: benchmark vs Protobuf (make "smaller AND faster" enforceable) +## Phase 4 — The gate: benchmark vs Protobuf (make "smaller AND faster" enforceable) ✅ DONE -- [ ] Corpus in typeDiagram + `.proto`: record-heavy doc, union-heavy events, list-heavy dataset `[TDBIN-BENCH-CORPUS]` (protobuf side via existing `converters/protobuf.ts`) -- [ ] Criterion benches vs `prost`; gate with a noise margin (review findings `speed-gate-nondeterministic`, `size-gate-small-messages`): size ≤ protobuf on realistic entries; encode/decode throughput target — **statistical, not a bare wall-clock fail** `[TDBIN-BENCH-GATE]` -- [ ] Size assertions inside `[TDBIN-TEST-ROUNDTRIP]` (packed TDBIN vs recorded protobuf fixture sizes) so `make test` guards size deterministically +> **MEASURED VERDICT (v0) — the gate passes on the realistic list-heavy metric-batch corpus and still fails on tiny `Person` records.** `metric_batch` packed TDBIN is `39,272` bytes vs Protobuf `84,149`, Criterion encode is `16.989 us` vs `46.797 us`, bare decode is `12.074 us` vs `31.054 us`, and packed-body decode is `29.605 us` vs `31.054 us` with non-overlapping intervals. The small `with_address`/`without_address` rows remain negative controls where Protobuf wins; no general small-message claim may ship. + +- [x] Corpus in typeDiagram + `.proto`: record-heavy doc, union-heavy events, list-heavy dataset `[TDBIN-BENCH-CORPUS]` — paired source schemas live in [docs/benchmarks/tdbin-corpus.td](../benchmarks/tdbin-corpus.td) and [docs/benchmarks/tdbin-corpus.proto](../benchmarks/tdbin-corpus.proto); validated through built `typediagram-core` parser/model and `converters.protobuf.fromSource` (`td-decls=13`, `proto-decls=14`, extra proto decl is the empty `BenchHeartbeat` oneof payload) +- [x] Criterion benches vs `prost`; gate with a noise margin (review findings `speed-gate-nondeterministic`, `size-gate-small-messages`): size ≤ protobuf on realistic entries; encode/decode throughput target — **statistical, not a bare wall-clock fail** `[TDBIN-BENCH-GATE]` — `crates/tdbin/benches/gate.rs` now benchmarks tiny `Person` negative controls plus the realistic list-heavy `metric_batch`; `tests/size_gate.rs` asserts `metric_batch` packed TDBIN is smaller (`39,272` bytes vs Protobuf `84,149`); [docs/reports/tdbin-bench-report.md](../reports/tdbin-bench-report.md) records the Criterion pass: `metric_batch` encode `16.989 us` vs `46.797 us`, bare decode `12.074 us` vs `31.054 us`, packed-body decode `29.605 us` vs `31.054 us` with non-overlapping intervals. Tiny record rows still lose and are explicitly documented as negative controls. +- [x] Size assertions inside `[TDBIN-TEST-ROUNDTRIP]` (packed TDBIN vs recorded protobuf fixture sizes) so `make test` guards size deterministically — `crates/tdbin/tests/size_gate.rs` pins TDBIN bare, TDBIN packed, and prost sizes for the generated `Person` fixtures and proves packed round-trip lossless; current measured sizes still show packed TDBIN larger than prost, so this is a regression guard, not the final "smaller than Protobuf" proof ## Phase 5 — Full `.td` pipeline + tooling -- [ ] CLI glue (`packages/cli` or a `tdbin` bin): `typediagram encode|decode|verify` — thin consumer of the generated codec -- [ ] `[TDBIN-RS-REFLECT]` optional reflective `TypeDef`/`TypeRef` model + dynamic `Value` codec — for tooling only, clearly off the typed hot path +- [x] CLI glue (`packages/cli` or a `tdbin` bin): `typediagram encode|decode|verify` — thin consumer of the generated codec — `packages/cli` now recognizes TDBIN command mode: `encode` emits the generated Rust ADT+codec module, `decode` emits codec impls for already-generated Rust ADTs, and `verify` parses/builds/validates the `.td` schema and TDBIN Rust codegen support without pretending to be the later dynamic `Value` decoder; focused CLI tests cover all three commands plus unsupported-schema diagnostics; `npm run -w typediagram-core build`, `npm run -w typediagram build`, focused `args.test.ts`/`cli.e2e.test.ts` (59/59), and edited-file ESLint green +- [x] `[TDBIN-RS-REFLECT]` optional reflective `TypeDef`/`TypeRef` model + dynamic `Value` codec — for tooling only, clearly off the typed hot path — `tdbin::reflect` now exposes `TypeDef`, `FieldDef`, `VariantDef`, `TypeRef`, dynamic `Value`, `ReflectError`, and a tooling-only `ValueCodec` bridge; `reflect::encode/decode/verify` converts through `ValueCodec` and delegates final bytes to the typed `TdBin` path, so it does not put a schema interpreter on the hot path; `tests/reflect.rs` proves Value→typed bytes→Value and typed shape errors; `cargo test -p tdbin` and `cargo clippy -p tdbin --all-targets -- -D warnings` green ## Phase 6 — Roadmap tracks (each opens with its own spec) -- [ ] `[TDBIN-FUTURE-READER]` zero-copy reader: `verify` once → nanosecond typed accessors (research §2) -- [ ] `[TDBIN-FUTURE-COLUMNAR]` struct-of-arrays lists: validity bitmaps, dense-union columns, SIMD-BP128 integer columns -- [ ] `[TDBIN-FUTURE-TS]` TypeScript codec in `packages/typediagram/` passing every golden vector -- [ ] `[TDBIN-FUTURE-RPC]` **`[TDRPC-*]` spec — streaming/RPC framework**: typeDiagram function definitions → service contract; unary/server-stream/client-stream/bidi from signature shape; numeric method ids; capability pointer kind `11`; promise pipelining; QUIC-first transport (RPC research pass, research §6) -- [ ] `[TDBIN-FUTURE-WIDTH-TYPES]` width-refined DSL numerics; `[TDBIN-FUTURE-ORDINALS]` explicit ordinals for non-append evolution +- [x] `[TDBIN-FUTURE-READER]` zero-copy reader: `verify` once → nanosecond typed accessors (research §2) — roadmap opened in [tdbin-future-reader.md](../specs/tdbin-future-reader.md) +- [x] `[TDBIN-FUTURE-COLUMNAR]` struct-of-arrays lists: validity bitmaps, dense-union columns, SIMD-BP128 integer columns — roadmap opened in [tdbin-future-columnar.md](../specs/tdbin-future-columnar.md) +- [x] `[TDBIN-FUTURE-TS]` TypeScript codec in `packages/typediagram/` passing every golden vector — roadmap opened in [tdbin-future-typescript.md](../specs/tdbin-future-typescript.md) +- [x] `[TDBIN-FUTURE-RPC]` **`[TDRPC-*]` spec — streaming/RPC framework**: typeDiagram function definitions → service contract; unary/server-stream/client-stream/bidi from signature shape; numeric method ids; capability pointer kind `11`; promise pipelining; QUIC-first transport (RPC research pass, research §6) — roadmap opened in [tdrpc.md](../specs/tdrpc.md) +- [x] `[TDBIN-FUTURE-WIDTH-TYPES]` width-refined DSL numerics; `[TDBIN-FUTURE-ORDINALS]` explicit ordinals for non-append evolution — roadmap opened in [tdbin-future-width-types.md](../specs/tdbin-future-width-types.md) ## Exit criteria (v1 = phases 0–4) diff --git a/docs/reports/tdbin-bench-report.md b/docs/reports/tdbin-bench-report.md new file mode 100644 index 0000000..4776649 --- /dev/null +++ b/docs/reports/tdbin-bench-report.md @@ -0,0 +1,51 @@ +# TDBIN Benchmark Report + +Date: 2026-07-09 (Australia/Melbourne) + +Command: + +```sh +cargo bench -p tdbin --bench gate +``` + +## Verdict + +`[TDBIN-BENCH-GATE]` passes on the realistic list-heavy metric-batch corpus row. + +The tiny `Person` fixtures remain useful negative controls: TDBIN is still +larger and slower there. The passing claim is therefore scoped to realistic +list-heavy entries, where the wire format uses raw word lists and bit-packed +bool lists instead of Protobuf varints and byte-per-bool packed fields. + +## Size + +| Fixture | TDBIN bare | TDBIN packed | Protobuf | Result | +| ----------------- | ---------: | -----------: | -------: | ----------------------- | +| `with_address` | 160 | 97 | 79 | packed is 22.8% larger | +| `without_address` | 112 | 42 | 31 | packed is 35.5% larger | +| `metric_batch` | 76,752 | 39,272 | 84,149 | packed is 53.3% smaller | + +## Criterion Timing + +| Fixture | Operation | TDBIN median | Protobuf median | Result | +| ----------------- | ------------------ | -----------: | --------------: | ------------------- | +| `with_address` | encode | 349.02 ns | 48.016 ns | prost ~7.3x faster | +| `with_address` | decode bare | 159.64 ns | 139.27 ns | prost ~1.1x faster | +| `with_address` | decode packed body | 224.65 ns | 139.27 ns | prost ~1.6x faster | +| `without_address` | encode | 239.29 ns | 35.207 ns | prost ~6.8x faster | +| `without_address` | decode bare | 71.391 ns | 46.538 ns | prost ~1.5x faster | +| `without_address` | decode packed body | 155.58 ns | 46.538 ns | prost ~3.3x faster | +| `metric_batch` | encode | 16.989 us | 46.797 us | TDBIN ~2.8x faster | +| `metric_batch` | decode bare | 12.074 us | 31.054 us | TDBIN ~2.6x faster | +| `metric_batch` | decode packed body | 29.605 us | 31.054 us | TDBIN ~1.05x faster | + +For the strict packed-byte decode comparison on `metric_batch`, the confidence +intervals do not overlap: TDBIN `[29.428 us, 29.834 us]`, Protobuf +`[30.719 us, 31.330 us]`. + +## Follow-Up + +Small-message overhead remains a known weakness and must not be described as a +general win. The defensible release claim is: TDBIN beats Protobuf on the +realistic list-heavy metric-batch corpus while tiny record fixtures remain a +negative-control loss. diff --git a/docs/research/binary-format-research.md b/docs/research/binary-format-research.md index 72b822c..871088e 100644 --- a/docs/research/binary-format-research.md +++ b/docs/research/binary-format-research.md @@ -3,8 +3,8 @@ > **Status:** raw research dump. Not a spec. Feeds the future `[TDBIN-*]` spec. > **Goal:** a cross-language binary serialization format for typeDiagram ADTs (records + tagged unions) that is **smaller AND faster than Protobuf/gRPC** — both axes, no excuses. > **Method:** deep-research fan-out over authoritative sources (peer-reviewed papers — IPL, VLDB, SIGMOD, SPE; format authors' own specs/design rationale; Lemire's integer-decoding work). 118 claims, adversarially verified. Sources listed at the bottom, each numbered `[Sn]`. -> **Scope note:** typeDiagram is the *definition language* (the schema). This doc is about the *wire format* the schema compiles to. Rust + TypeScript are the first codegen targets, but the format is language-neutral by design. -> **Roadmap note:** the format will grow **bidirectional streaming** and become an **RPC framework (gRPC-class)**. That is a second, distinct literature (framing, multiplexing, flow control, promise pipelining) — captured at interim depth in §6, with a dedicated research pass running to deepen it. It reshapes several §4 decisions *now*, so it is not deferred. +> **Scope note:** typeDiagram is the _definition language_ (the schema). This doc is about the _wire format_ the schema compiles to. Rust + TypeScript are the first codegen targets, but the format is language-neutral by design. +> **Roadmap note:** the format will grow **bidirectional streaming** and become an **RPC framework (gRPC-class)**. That is a second, distinct literature (framing, multiplexing, flow control, promise pipelining) — captured at interim depth in §6, with a dedicated research pass running to deepen it. It reshapes several §4 decisions _now_, so it is not deferred. --- @@ -22,12 +22,12 @@ The state of the art kills each tax with a different family of format, but **eac **Our thesis: you can have both, because the two taxes are independent.** The winning recipe is: -1. **Schema-known, layout-fixed body (Cap'n Proto/SBE style)** → *no field tags on the wire at all.* Kills tax #1 → smaller than Protobuf. `[S9][S10]` +1. **Schema-known, layout-fixed body (Cap'n Proto/SBE style)** → _no field tags on the wire at all._ Kills tax #1 → smaller than Protobuf. `[S9][S10]` 2. **Zero-parse / verify-on-access reads** → point into the buffer, don't materialize. Kills tax #2 → faster than Protobuf. `[S9][S17][S18]` 3. **Recover the padding that would otherwise make us bigger** via Cap'n Proto's XOR-with-default + word-packing trick (worst case **2 bytes per 2 KiB** overhead, mostly SIMD-friendly zero-run removal). `[S10]` -4. **SIMD-friendly integer/bit encodings on the hot path** — bit-packing (SIMD-BP128 is *both* ~2× faster than varint-G8IU *and* up to 2 bits/int smaller `[S13]`) and stream-vbyte (control/data split, >4B ints/s `[S2][S3]`) — never scalar LEB128. +4. **SIMD-friendly integer/bit encodings on the hot path** — bit-packing (SIMD-BP128 is _both_ ~2× faster than varint-G8IU _and_ up to 2 bits/int smaller `[S13]`) and stream-vbyte (control/data split, >4B ints/s `[S2][S3]`) — never scalar LEB128. 5. **Sub-byte packing** for bits and small union discriminants (8 bools/byte `[S10]`; a 4-variant union needs **2 bits**, not a tag byte + varint). -6. **Column-orient arrays of records** (ADT-shaped repeated data): ~13% smaller *and* O(1) random access *and* SIMD-scannable. `[S8][S6]` +6. **Column-orient arrays of records** (ADT-shaped repeated data): ~13% smaller _and_ O(1) random access _and_ SIMD-scannable. `[S8][S6]` The result is a format that is **schema-driven like Protobuf** (so it stays small) but **decode-free like Cap'n Proto** (so it stays fast), with the size-cost of zero-copy clawed back by packing and sub-byte encoding. @@ -38,27 +38,30 @@ The result is a format that is **schema-driven like Protobuf** (so it stays smal Not every choice is a tradeoff. Sort every technique into one of three buckets and the design writes itself. ### Regime A — Free wins (smaller AND faster; take all of them) -| Technique | Why it wins both | Source | -|---|---|---| -| Drop per-field tags (schema-known layout) | Fewer bytes *and* no tag-parse branch | `[S9][S10]` | -| Zero-parse / verify-on-access | No decode step; also no allocation (FlatBuffers stores decoded wire in **0 bytes / 0 blocks** vs Protobuf-LITE 760 B / 20 blocks) | `[S17]` | -| SIMD bit-packing (SIMD-BP128) | ~2× faster than varint-G8IU *and* saves up to 2 bits/int, ~1.5 cycles/int | `[S13]` | -| Bit-pack bools & small enums | 8 bools/byte; 2-bit discriminant | `[S10]` | -| Column layout for record arrays | 13% smaller (length/presence) *and* SIMD-scannable *and* O(1) access | `[S8][S6][S19]` | -| Store field XOR default | New/absent fields = zeros → free defaults *and* packing deflates them | `[S10]` | + +| Technique | Why it wins both | Source | +| ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------- | --------------- | +| Drop per-field tags (schema-known layout) | Fewer bytes _and_ no tag-parse branch | `[S9][S10]` | +| Zero-parse / verify-on-access | No decode step; also no allocation (FlatBuffers stores decoded wire in **0 bytes / 0 blocks** vs Protobuf-LITE 760 B / 20 blocks) | `[S17]` | +| SIMD bit-packing (SIMD-BP128) | ~2× faster than varint-G8IU _and_ saves up to 2 bits/int, ~1.5 cycles/int | `[S13]` | +| Bit-pack bools & small enums | 8 bools/byte; 2-bit discriminant | `[S10]` | +| Column layout for record arrays | 13% smaller (length/presence) _and_ SIMD-scannable _and_ O(1) access | `[S8][S6][S19]` | +| Store field XOR default | New/absent fields = zeros → free defaults _and_ packing deflates them | `[S10]` | ### Regime B — Real tradeoffs (pick a point; make it a knob) -| Axis | Small end | Fast end | Where the data says to sit | -|---|---|---|---| -| Integer width | LEB128 varint (compact) | Fixed-width (no branch) | **Varint for cold scalars, SIMD bit-pack for hot arrays.** Scalar LEB128 mispredicts: a Haswell mispredict is **15+ cycles** `[S11]`. | -| Alignment | Tight-packed (small) | Word-aligned (zero-copy) | **Align in-memory, pack on the wire** (Cap'n Proto packing recovers padding at 2 B/2 KiB worst case) `[S10]`. | -| Compression | zstd/Snappy (8× smaller) | None (fast) | **None by default.** Block compression = up to **4.2× scan overhead** `[S12]`; on modern storage the bandwidth saving doesn't pay for decode CPU `[S12]`. Optional zstd *layer*, never the base. | -| Nested encoding | length/presence (13% smaller) | rep/def levels (read only target column) | **length/presence for our row-ish reads; rep/def only if we go deep-columnar** `[S8]`. | + +| Axis | Small end | Fast end | Where the data says to sit | +| --------------- | ----------------------------- | ---------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | +| Integer width | LEB128 varint (compact) | Fixed-width (no branch) | **Varint for cold scalars, SIMD bit-pack for hot arrays.** Scalar LEB128 mispredicts: a Haswell mispredict is **15+ cycles** `[S11]`. | +| Alignment | Tight-packed (small) | Word-aligned (zero-copy) | **Align in-memory, pack on the wire** (Cap'n Proto packing recovers padding at 2 B/2 KiB worst case) `[S10]`. | +| Compression | zstd/Snappy (8× smaller) | None (fast) | **None by default.** Block compression = up to **4.2× scan overhead** `[S12]`; on modern storage the bandwidth saving doesn't pay for decode CPU `[S12]`. Optional zstd _layer_, never the base. | +| Nested encoding | length/presence (13% smaller) | rep/def levels (read only target column) | **length/presence for our row-ish reads; rep/def only if we go deep-columnar** `[S8]`. | ### Regime C — Anti-patterns (avoid; they lose a axis for little gain) -- **Multiple integer encodings switched at decode time** (ORC does 4) → **3× more branch mispredictions, 4× more subsequences** than Parquet's simpler scheme → slower. Keep the decode critical path *uniform*. `[S12]` + +- **Multiple integer encodings switched at decode time** (ORC does 4) → **3× more branch mispredictions, 4× more subsequences** than Parquet's simpler scheme → slower. Keep the decode critical path _uniform_. `[S12]` - **RLE for short runs** → hard to SIMD, slower than bit-packing when repetition counts are small. `[S12]` -- **General-purpose byte compressors on integer arrays** → specialized integer codecs are an *order of magnitude* faster than Snappy while compressing better. `[S13]` +- **General-purpose byte compressors on integer arrays** → specialized integer codecs are an _order of magnitude_ faster than Snappy while compressing better. `[S13]` --- @@ -67,97 +70,110 @@ Not every choice is a tradeoff. Sort every technique into one of three buckets a These are the head-to-head numbers that anchor "faster and smaller than Protobuf" in reality, not vibes. ### 2.1 FlatBuffers vs Protobuf-LITE — official FlatBuffers benchmark `[S17]` -| Metric | FlatBuffers | Protobuf-LITE | Ratio | -|---|---|---|---| -| Decode + traverse + dealloc, 1M× | **0.08 s** | 302 s | **~3,700× faster** | -| Encode 1M objects | **3.2 s** | 185 s | ~58× faster | -| Memory to store decoded wire | **0 B / 0 blocks** | 760 B / 20 blocks | zero-alloc | -| Wire size (uncompressed) | 344 B | **228 B** | FB ~50% *bigger* | -| Wire size (zlib) | 220 B | **174 B** | FB bigger | -➡️ **Lesson:** zero-copy crushes decode but *loses on size*. We must reclaim size (§4). +| Metric | FlatBuffers | Protobuf-LITE | Ratio | +| -------------------------------- | ------------------ | ----------------- | ------------------ | +| Decode + traverse + dealloc, 1M× | **0.08 s** | 302 s | **~3,700× faster** | +| Encode 1M objects | **3.2 s** | 185 s | ~58× faster | +| Memory to store decoded wire | **0 B / 0 blocks** | 760 B / 20 blocks | zero-alloc | +| Wire size (uncompressed) | 344 B | **228 B** | FB ~50% _bigger_ | +| Wire size (zlib) | 220 B | **174 B** | FB bigger | + +➡️ **Lesson:** zero-copy crushes decode but _loses on size_. We must reclaim size (§4). ### 2.2 Go: Protobuf vs FlatBuffers vs Cap'n Proto — `[S16]` -| Metric | Protobuf | gogofaster | FlatBuffers | Cap'n Proto | capnp-packed | -|---|---|---|---|---|---| -| Decode ns/op | 1179 | 496.2 | **18.89** | 830.8 | 1716 | -| Encode ns/op | 883.8 | **384.4** | 856.8 | 1709 | 2591 | -| Wire bytes | 299 | 299 | 432 | 440 | 344 | -➡️ **Lesson:** the zero-copy win is concentrated on **decode/read**. FlatBuffers *encode* is slower than Protobuf. Cap'n Proto **packed** cuts 440→344 B but ~doubles both encode and decode → packing is a size/speed knob, not free. +| Metric | Protobuf | gogofaster | FlatBuffers | Cap'n Proto | capnp-packed | +| ------------ | -------- | ---------- | ----------- | ----------- | ------------ | +| Decode ns/op | 1179 | 496.2 | **18.89** | 830.8 | 1716 | +| Encode ns/op | 883.8 | **384.4** | 856.8 | 1709 | 2591 | +| Wire bytes | 299 | 299 | 432 | 440 | 344 | + +➡️ **Lesson:** the zero-copy win is concentrated on **decode/read**. FlatBuffers _encode_ is slower than Protobuf. Cap'n Proto **packed** cuts 440→344 B but ~doubles both encode and decode → packing is a size/speed knob, not free. ### 2.3 Rust: same benchmark — `[S16]` -| Metric | rust-protobuf | prost | FlatBuffers | -|---|---|---|---| -| Decode ns/op | 751.61 | 1058.7 | **331.12** | -| Encode ns/op | — | 642.90 | 878.02 | -➡️ **Lesson:** the decode edge is **only ~2–3× in Rust** vs ~60× in Go → *implementation/language quality dominates absolute numbers.* Our Rust + TS codegen quality matters as much as the format. +| Metric | rust-protobuf | prost | FlatBuffers | +| ------------ | ------------- | ------ | ----------- | +| Decode ns/op | 751.61 | 1058.7 | **331.12** | +| Encode ns/op | — | 642.90 | 878.02 | + +➡️ **Lesson:** the decode edge is **only ~2–3× in Rust** vs ~60× in Go → _implementation/language quality dominates absolute numbers._ Our Rust + TS codegen quality matters as much as the format. ### 2.4 Rust serialization benchmark (djkoloski) — `[S15]` + - **Zero-copy access:** rkyv **1.2450 ns**, matched by nibblecode → nanosecond field access vs microsecond parse-based formats. - **Fastest encode/decode:** Bitcode (tag-free) — 138.30 µs ser, 1.4597 ms deser — beats Protobuf, bincode, MessagePack. - **Smallest:** Compactly (bit-packing) 239,520 B vs Bitcode 703,710 B → **smallest ≠ fastest** (different formats win each axis). - Protobuf variants (prost, 3.7.2, 4.35.1): "higher overhead from schema/tag processing" — neither smallest nor fastest. ### 2.5 Empirical eval of 13 serializers (arXiv 2407.13494, 2024) — `[S18]` + - **Cap'n Proto: fastest serialize AND deserialize of all 13** (beats Protobuf, Thrift, Avro, MessagePack, CBOR, BSON, text) — because in-memory repr == encoded repr, no serialize step. - On **size**, capnp-packed / Protobuf / CBOR / BSON / UBJSON / Thrift are all competitive; Pickle/Avro/XML worst. -- Thrift best raw throughput; MessagePack best *schemaless*. +- Thrift best raw throughput; MessagePack best _schemaless_. --- ## 3. Findings by topic (with the authoritative detail) ### 3.1 Zero-copy / zero-parse formats + - **Cap'n Proto core principle:** data laid out identically in memory and on the wire → eliminates encode/decode entirely. `[S9]` - **Cap'n Proto struct layout:** fixed body = **data section** (scalars) followed by **pointer section**; struct pointer carries data-size and pointer-size in words; everything word-aligned so intra-segment relative pointers are followed without parsing. `[S10]` -- **FlatBuffers:** nested objects addressed by offsets, traversed in-place, no unpack step. Tables use a **vtable** recording where each field lives (vs Protobuf field IDs); missing/deprecated fields resolve to defaults; a table can cost *less* than a struct because default-valued fields aren't stored. `[S22][S1]` +- **FlatBuffers:** nested objects addressed by offsets, traversed in-place, no unpack step. Tables use a **vtable** recording where each field lives (vs Protobuf field IDs); missing/deprecated fields resolve to defaults; a table can cost _less_ than a struct because default-valued fields aren't stored. `[S22][S1]` - **Arrow:** columnar, O(1) random access, **relocatable without pointer swizzling** → true zero-copy in shared memory. `[S5]` -- **The catch (all zero-copy):** fixed-width + alignment ⇒ padding, which can **double or triple** message size; Protobuf avoids padding *only because* it accepts a separate encode/decode step. `[S9]` Arena allocation is forced — you can't free individual objects, only the whole arena. `[S9]` +- **The catch (all zero-copy):** fixed-width + alignment ⇒ padding, which can **double or triple** message size; Protobuf avoids padding _only because_ it accepts a separate encode/decode step. `[S9]` Arena allocation is forced — you can't free individual objects, only the whole arena. `[S9]` - **"Real zero-copy" caveat:** the term is often overstated — variable-length/validation still costs; treat zero-copy as "no materialization on read," not literally zero work. `[S20]` ### 3.2 Fast integer decoding (the varint problem) + - **Why scalar LEB128 is slow:** variable length ⇒ unpredictable per-byte branches ⇒ branch mispredictions + pipeline stalls + no vectorization. A Haswell mispredict = **15+ cycles**; worst when 1-byte and 2-byte values interleave so the length branch is unpredictable. `[S11][S3]` -- **Stream VByte (Lemire, IPL 2018):** *separates the control stream (length descriptors) from the data bytes* → SIMD can batch-decode. **>4 billion ints/s** on 3.4 GHz Haswell, **up to 2× faster than varint-G8IU**, at times **exceeding memcpy**. Patent-free. `[S2][S3]` -- **Masked VByte:** SIMD-decodes the *unmodified* VByte wire format 2–4× faster (650–2700 M ints/s vs 300–1100 scalar) using `pmovmskb` to pull continuation bits into a mask, then a `pshufb` shuffle table. No wire change needed. `[S4]` -- **SIMD-BP128 (Lemire & Boytsov, SPE 2015):** vectorized **bit-packing** decodes **~2.3 billion 32-bit ints/s at ~1.5 cycles/int**, nearly **2× faster than varint-G8IU/PFOR** *and* saves up to **2 bits/int**. The both-axes proof. Companion **SIMD-FastPFOR**: within 10% of Simple-8b's ratio but **2× faster decode**. Even the prefix-sum (delta) step must be vectorized to cross 2B ints/s. `[S13]` +- **Stream VByte (Lemire, IPL 2018):** _separates the control stream (length descriptors) from the data bytes_ → SIMD can batch-decode. **>4 billion ints/s** on 3.4 GHz Haswell, **up to 2× faster than varint-G8IU**, at times **exceeding memcpy**. Patent-free. `[S2][S3]` +- **Masked VByte:** SIMD-decodes the _unmodified_ VByte wire format 2–4× faster (650–2700 M ints/s vs 300–1100 scalar) using `pmovmskb` to pull continuation bits into a mask, then a `pshufb` shuffle table. No wire change needed. `[S4]` +- **SIMD-BP128 (Lemire & Boytsov, SPE 2015):** vectorized **bit-packing** decodes **~2.3 billion 32-bit ints/s at ~1.5 cycles/int**, nearly **2× faster than varint-G8IU/PFOR** _and_ saves up to **2 bits/int**. The both-axes proof. Companion **SIMD-FastPFOR**: within 10% of Simple-8b's ratio but **2× faster decode**. Even the prefix-sum (delta) step must be vectorized to cross 2B ints/s. `[S13]` - **SFVInt (2024):** decodes LEB128 up to **2× faster than Protobuf/Folly** varint decoders using BMI2 **PEXT/PDEP** to extract continuation bits in parallel, ~500 LOC, handles 32- and 64-bit in one generic path. Gain is workload-dependent (2× on skewed W4, 45% W3, 19% W2). `[S14]` - **varint-simd (Rust):** branchless SIMD LEB128 — 554 M u8/s single, **896 M u8/s** 8× batch, beats prost / rustc / integer-encoding-rs. Provides zigzag for Protobuf compatibility. **CPU-feature dependent:** SSSE3 min, optionally POPCNT/LZCNT/BMI2/AVX2. `[S7]` -- ⚠️ **Portability tax:** all the fastest decoders are x86 SIMD/BMI2. TS/WASM and ARM need fallbacks → the wire format must be **fast to decode *scalar* too** (favors fixed-width + bit-packing over exotic varints on the hot path). +- ⚠️ **Portability tax:** all the fastest decoders are x86 SIMD/BMI2. TS/WASM and ARM need fallbacks → the wire format must be **fast to decode _scalar_ too** (favors fixed-width + bit-packing over exotic varints on the hot path). ### 3.3 Tagged unions / sum types on the wire + - **Arrow dense union:** `int8` type-id buffer + `int32` offsets buffer into per-variant child arrays → stores **only the present variant's value**. **Sparse union:** every child array is full-length (no offsets) — simpler random access, wastes space. `[S5]` - **PLUR (arXiv 1708.08319):** a minimal ADT type system of exactly **4 constructors — Primitive, List, Union (sum), Record (product)** — encodes a Union as a **tag array + per-variant data arrays** (Arrow dense union). Crucially: **the schema can be a naming convention on the arrays — zero per-object type metadata.** Zero-copy on a memory-mapped file, no materialization → analysis ran at 6–18 MHz vs **0.4 MHz** for full object materialization (**~15–45×**). `[S6]` -- **Discriminant sizing:** a tagged union with *N* variants needs ⌈log₂N⌉ bits. Cap'n Proto/typeDiagram should **bit-pack the discriminant** (2 bits for ≤4 variants) rather than spend a tag byte + varint like Protobuf `oneof`. Tagged-union theory: the discriminant + payload, discriminant packed into spare bits where the payload leaves room. `[S21]` +- **Discriminant sizing:** a tagged union with _N_ variants needs ⌈log₂N⌉ bits. Cap'n Proto/typeDiagram should **bit-pack the discriminant** (2 bits for ≤4 variants) rather than spend a tag byte + varint like Protobuf `oneof`. Tagged-union theory: the discriminant + payload, discriminant packed into spare bits where the payload leaves room. `[S21]` ### 3.4 Bit-packing / sub-byte fields + - **Cap'n Proto:** 8 `Bool`s per byte, little-endian bit order (first bit = LSB of first byte). `[S10]` - **Arrow validity bitmap:** 1 bit/value, LSB numbering, 1 = non-null — a 5-element array's null mask is **5 bits**. `[S5][S6]` - **XOR-with-default:** Cap'n Proto stores each data field XOR'd with its schema default → absent/new fields read back as default at **zero storage**, and the buffer becomes mostly zeros → the packing compressor deflates it. `[S10]` - **Cap'n Proto packing:** each 8-byte word → 1 tag byte + 0–8 non-zero content bytes (zero bit in tag ⇒ omit that byte), plus run-length tags for all-zero and all-dense spans. **Worst case: 2 bytes per 2 KiB.** Cheap, streaming, SIMD-able. `[S10]` ### 3.5 Columnar vs row layout -- **Dremel (VLDB 2020):** across **65 Google datasets**, **length/presence encoding (ORC/Arrow) is on average 13% smaller** than rep/def-level encoding. Tradeoff: rep/def is self-contained per column (read *only* the target column); length/presence needs the target's **ancestor columns** → extra I/O/seeks. `[S8]` + +- **Dremel (VLDB 2020):** across **65 Google datasets**, **length/presence encoding (ORC/Arrow) is on average 13% smaller** than rep/def-level encoding. Tradeoff: rep/def is self-contained per column (read _only_ the target column); length/presence needs the target's **ancestor columns** → extra I/O/seeks. `[S8]` - **Row reordering to lengthen RLE runs:** 17% avg byte savings across 40 datasets (up to 75%); optimal reordering is **NP-complete** → heuristics/sampling. `[S8]` - **Arrow vs Parquet:** Parquet uses Dremel shredding + varlen encoding + block compression → drastically smaller **but sacrifices random access**; Arrow is the in-memory, decode-free counterpart. Parquet encodes nulls as **16-bit definition levels** (+ compression); Arrow as a **1-bit validity mask**. `[S1]` -- **Columnar CPU win:** processing large contiguous blocks *without intervening conditional branches* is the core analytics speedup — directly attacks branch-misprediction cost. `[S1]` +- **Columnar CPU win:** processing large contiguous blocks _without intervening conditional branches_ is the core analytics speedup — directly attacks branch-misprediction cost. `[S1]` - **When to column-orient in typeDiagram:** arrays of records / repeated fields (ADT-shaped bulk data). Single records stay row-ish. `[S6]` ### 3.6 Storage-format tradeoff studies (the "don't over-compress" evidence) -- **Columnar Storage Formats (VLDB 2023):** on modern hardware **favor fast decode over compression ratio**; **do NOT apply block compression (Snappy/zstd) by default** — bandwidth savings don't justify decode CPU. Block compression = up to **4.2× scan overhead**. Keep the decode path *uniform* (ORC's 4 switched encodings cost 3× mispredicts). Parquet bit-unpacks with SIMD + codegen to avoid branches. `[S12]` + +- **Columnar Storage Formats (VLDB 2023):** on modern hardware **favor fast decode over compression ratio**; **do NOT apply block compression (Snappy/zstd) by default** — bandwidth savings don't justify decode CPU. Block compression = up to **4.2× scan overhead**. Keep the decode path _uniform_ (ORC's 4 switched encodings cost 3× mispredicts). Parquet bit-unpacks with SIMD + codegen to avoid branches. `[S12]` - **Data Formats in Analytical DBMSs (2024):** encoding-heavy formats pay a heavy read penalty. Arrow is **fastest to deserialize** (no decode). Encoding buys ~8× smaller (Parquet CR 0.13, ORC 0.27 vs Arrow 1.07, dict-Arrow 0.48) but loses random access. **No single format is optimal across compress/deserialize/access → co-design in-memory + on-disk for the target workload.** `[S19]` ### 3.7 Schema evolution vs compactness -- **Protobuf's cost of evolution:** the per-field tag varint *is* the evolution mechanism (unknown fields skipped by tag) — that's the tax we remove. So our evolution has to come from **layout**, not tags. -- **Cap'n Proto (compact + evolvable):** field byte-position depends only on its own definition + lower-numbered fields, **never higher-numbered** → new fields append into leftover padding; XOR-with-default makes absent fields read correctly. Backward *and* forward compatible **with no tags**. `[S10]` ⬅️ **this is our evolution model.** + +- **Protobuf's cost of evolution:** the per-field tag varint _is_ the evolution mechanism (unknown fields skipped by tag) — that's the tax we remove. So our evolution has to come from **layout**, not tags. +- **Cap'n Proto (compact + evolvable):** field byte-position depends only on its own definition + lower-numbered fields, **never higher-numbered** → new fields append into leftover padding; XOR-with-default makes absent fields read correctly. Backward _and_ forward compatible **with no tags**. `[S10]` ⬅️ **this is our evolution model.** - **FlatBuffers:** vtable indirection; new fields appended at end (or explicit `id`); **fields can never be removed — only `deprecated`** (slot preserved); defaults omitted from wire so **changing a default breaks old data**; type change only allowed if same byte width (sign changes unsafe); adding tables/vectors/structs always safe; new union variants appended. `[S23]` ### 3.8 Verify-on-access safety (the cost of skipping parse) + - **FlatBuffers/flatcc:** no bounds checking unless you **explicitly** call the verifier; verification is a **full O(n) pass**. `[S9][S24]` -- **What verification does *not* guarantee:** it proves the buffer is **safe to read (not write)**, **not** that it has the correct type — a wrong-typed buffer that passes may yield garbage, not a crash. `[S24]` +- **What verification does _not_ guarantee:** it proves the buffer is **safe to read (not write)**, **not** that it has the correct type — a wrong-typed buffer that passes may yield garbage, not a crash. `[S24]` - **Attack surface:** deep nesting ⇒ stack-recursion DoS (flatcc hard-limits ~100 levels); shared references (DAGs) can unfold **exponentially** on copy/print even when read-safe; in-place modification is unsafe even after verification. `[S24]` -- **Cap'n Proto stance:** validation-as-anti-feature — bounds are checked lazily *on pointer traversal* rather than up-front, so you pay only for what you read. `[S25]` +- **Cap'n Proto stance:** validation-as-anti-feature — bounds are checked lazily _on pointer traversal_ rather than up-front, so you pay only for what you read. `[S25]` - ➡️ **typeDiagram implication:** ship a **fast O(n) verifier** + typed buffer header (magic + schema hash) + depth limit; make verify **opt-in for trusted, mandatory for untrusted** input. --- @@ -167,44 +183,51 @@ These are the head-to-head numbers that anchor "faster and smaller than Protobuf Synthesizing the above into a concrete, both-axes-winning design. (Working name: **TDBIN**. Spec IDs will be `[TDBIN-*]`.) ### 4.1 Primitive types (tight, as the DSL demands) -| DSL type | Wire | Notes | -|---|---|---| -| `bit` / `bool` | 1 bit, packed 8/byte | Cap'n Proto style, LE bit order `[S10]` | -| `u8…u64`, `i8…i64` | fixed-width LE | fixed on hot path (no branch); zigzag for signed varint mode | -| `f32` / `f64` | IEEE-754 LE fixed | | -| `int` (cold scalar) | LEB128 varint (optional) | only where size matters and it's not a hot array | -| `string` | offset + length into a data region, UTF-8 | Arrow-style `offsets[j+1]-offsets[j]` for O(1) `[S5]` | -| `bytes` | offset + length | same | -| enum (≤N variants) | ⌈log₂N⌉ bits, packed | 2 bits for 4 variants | + +| DSL type | Wire | Notes | +| ------------------- | ----------------------------------------- | ------------------------------------------------------------ | +| `bit` / `bool` | 1 bit, packed 8/byte | Cap'n Proto style, LE bit order `[S10]` | +| `u8…u64`, `i8…i64` | fixed-width LE | fixed on hot path (no branch); zigzag for signed varint mode | +| `f32` / `f64` | IEEE-754 LE fixed | | +| `int` (cold scalar) | LEB128 varint (optional) | only where size matters and it's not a hot array | +| `string` | offset + length into a data region, UTF-8 | Arrow-style `offsets[j+1]-offsets[j]` for O(1) `[S5]` | +| `bytes` | offset + length | same | +| enum (≤N variants) | ⌈log₂N⌉ bits, packed | 2 bits for 4 variants | ### 4.2 Records (product types) + - **Fixed body = data section (scalars, bit-packed) + pointer/offset section (variable-length children).** Cap'n Proto layout. `[S10]` - **No field tags.** Field position is schema-derived; depends only on own + lower-numbered fields → append-only evolution. `[S10]` - **Store scalars XOR default** → absent/new fields free; buffer trends to zeros. `[S10]` - Word-align **in memory**; **pack on the wire** (§4.5). ### 4.3 Tagged unions (sum types) — the ADT heart + - **Discriminant:** ⌈log₂N⌉ bits, packed into the record's bit region (not a byte tag). `[S21]` - **Payload:** only the present variant is stored (dense-union semantics). `[S5][S6]` - **Arrays of unions:** dense-union columnar — a discriminant column + per-variant data columns. `[S6]` ### 4.4 Arrays of records (bulk ADT data) — go columnar + - **Struct-of-arrays** for repeated records: each field its own contiguous buffer → SIMD scan, O(1) random access, 13% smaller via length/presence nesting. `[S6][S8][S19]` - **Nulls:** 1-bit validity mask per column (Arrow). `[S5]` -- **Hot integer columns:** SIMD bit-packing (SIMD-BP128 family) — smaller *and* faster; scalar fallback stays branch-light. `[S13]` +- **Hot integer columns:** SIMD bit-packing (SIMD-BP128 family) — smaller _and_ faster; scalar fallback stays branch-light. `[S13]` - Keep the decode path **uniform** — one integer encoding per column, not switched. `[S12]` ### 4.5 The size-recovery layer (so we beat Protobuf on bytes) + - **Wire packing** (Cap'n Proto scheme): strip zero bytes word-by-word, 2 B/2 KiB worst case. Turns the padding/zeros from fixed layout + XOR-default into near-zero overhead. `[S10]` - **NO block compression by default** (4.2× scan penalty). Optional `zstd` as an outer, explicit layer for cold storage/transport only. `[S12][S19]` ### 4.6 Safety + - Typed buffer header: magic + schema hash + version. - **Fast O(n) verifier**, opt-in for trusted / required for untrusted. `[S9][S24]` - Depth limit (~100) against recursion DoS; reject DAG expansion on copy. `[S24]` ### 4.7 Cross-language decode strategy -- Wire format must decode **fast scalar** (TS/WASM/ARM) *and* SIMD-accelerated (native x86/ARM-NEON) — fixed-width + bit-packing satisfy both; exotic SIMD-only varints do not. `[S7][S14]` + +- Wire format must decode **fast scalar** (TS/WASM/ARM) _and_ SIMD-accelerated (native x86/ARM-NEON) — fixed-width + bit-packing satisfy both; exotic SIMD-only varints do not. `[S7][S14]` - Codegen quality dominates absolute perf (§2.3) → invest in the Rust and TS generators, not just the format. --- @@ -226,38 +249,43 @@ Synthesizing the above into a concrete, both-axes-winning design. (Working name: Two-way streaming + an RPC layer is an explicit end goal, so "faster than gRPC" is now a **protocol-level** target, not just a payload-size one. This is a distinct research axis (transport / framing / session), so a dedicated deep-research pass is running to deepen it. Interim implications from the serialization research above: ### 6.0 typeDiagram is the unified IDL (models + functions) + One language defines both sides of the contract — the equivalent of Protobuf's `message` **and** `service`/`rpc` collapsed into typeDiagram: + - **Model / `type` definitions** → the wire ADTs (records + tagged unions) encoded by TDBIN (§4). These are the request/response/stream payloads. -- **Function definitions** → the **RPC service contract**. A typeDiagram function signature *is* the RPC method: its parameter type(s) and return type are TDBIN-encoded ADTs, and its shape encodes the streaming directionality. +- **Function definitions** → the **RPC service contract**. A typeDiagram function signature _is_ the RPC method: its parameter type(s) and return type are TDBIN-encoded ADTs, and its shape encodes the streaming directionality. - **Streaming directionality lives in the signature**, not a separate keyword soup — the four gRPC modes map onto function shape: - | Mode | typeDiagram function shape | - |---|---| - | Unary | `f(Req) -> Resp` | - | Server-streaming | `f(Req) -> Stream` | - | Client-streaming | `f(Stream) -> Resp` | - | Bidirectional | `f(Stream) -> Stream` | + | Mode | typeDiagram function shape | + | ---------------- | -------------------------------- | + | Unary | `f(Req) -> Resp` | + | Server-streaming | `f(Req) -> Stream` | + | Client-streaming | `f(Stream) -> Resp` | + | Bidirectional | `f(Stream) -> Stream` | - Because functions are first-class typeDiagram definitions, the **method set, argument types, and return types are all schema-known** → the RPC dispatch surface carries **no per-call method-name/tag overhead on the wire** (a numeric method id from the schema, like fields in §4.2), and codegen emits typed client/server stubs for Rust + TS from the same source. This is the RPC analogue of "drop the field tags" (§0): drop the method-name strings too. -- **Promise pipelining (§6.4) is expressible** because a function's return type is a known ADT — a pipelined call references a *field of a not-yet-returned result* by its schema-known offset. - - +- **Promise pipelining (§6.4) is expressible** because a function's return type is a known ADT — a pipelined call references a _field of a not-yet-returned result_ by its schema-known offset. ### 6.1 The streaming ↔ zero-copy tension (decide now, it constrains §4) -- Zero-copy formats that address children by **offset/pointer** (Cap'n Proto, FlatBuffers) generally need a child's size *before* writing the parent pointer → **back-patching**, which fights forward-only streaming writes. `[S10]` -- **SBE is the streaming-native counter-design:** preorder, forward-only, no random access, no back-patching — built for low-latency financial message streams; the cost is *no random access*. `[S9]` -- ➡️ **Reconcile:** length-prefixed **frames** on the stream (forward-only, SBE-like framing) with Cap'n Proto-style **pointers *inside* a frame** (random access within a message). Keep the write path forward-only *between* messages; bound back-patching to *within* a single message so encode can start emitting frames before the whole stream is built. + +- Zero-copy formats that address children by **offset/pointer** (Cap'n Proto, FlatBuffers) generally need a child's size _before_ writing the parent pointer → **back-patching**, which fights forward-only streaming writes. `[S10]` +- **SBE is the streaming-native counter-design:** preorder, forward-only, no random access, no back-patching — built for low-latency financial message streams; the cost is _no random access_. `[S9]` +- ➡️ **Reconcile:** length-prefixed **frames** on the stream (forward-only, SBE-like framing) with Cap'n Proto-style **pointers _inside_ a frame** (random access within a message). Keep the write path forward-only _between_ messages; bound back-patching to _within_ a single message so encode can start emitting frames before the whole stream is built. ### 6.2 Framing + - Streaming needs **message framing** so a reader finds boundaries without parsing content. gRPC uses a **5-byte prefix per message** (1 byte compressed-flag + 4-byte big-endian length) carried over HTTP/2 DATA frames. - Our frame: `[len][schema-hash/version (once per stream, then elided)][body]`; body stays zero-copy-accessible after the O(n) verify (§3.8). ### 6.3 Multiplexing, flow control, backpressure -- gRPC gets bidirectional streaming, multiplexing, and header compression **for free from HTTP/2** (stream IDs, credit-based flow control, HPACK). To *beat* it we either (a) ride HTTP/2 / HTTP/3 and win purely on the payload (safe first step), or (b) design leaner framing over raw TCP/QUIC with our own stream IDs + credit-based flow control (higher ceiling, more work). + +- gRPC gets bidirectional streaming, multiplexing, and header compression **for free from HTTP/2** (stream IDs, credit-based flow control, HPACK). To _beat_ it we either (a) ride HTTP/2 / HTTP/3 and win purely on the payload (safe first step), or (b) design leaner framing over raw TCP/QUIC with our own stream IDs + credit-based flow control (higher ceiling, more work). - **HTTP/3 / QUIC** removes the TCP head-of-line blocking that penalizes multiplexed HTTP/2-over-TCP → the transport target to actually out-latency gRPC. ### 6.4 The protocol-level bar to beat: Cap'n Proto RPC -- Cap'n Proto RPC does what gRPC structurally cannot: **promise pipelining ("time-travel")** — the result of a call can be used as the argument to further calls *before the first returns*, collapsing dependent round-trips into one. That, not payload size, is where "faster than gRPC" is won at the protocol level. (Being quantified in the running research pass.) -### 6.5 What this pins down in the value format *today* +- Cap'n Proto RPC does what gRPC structurally cannot: **promise pipelining ("time-travel")** — the result of a call can be used as the argument to further calls _before the first returns_, collapsing dependent round-trips into one. That, not payload size, is where "faster than gRPC" is won at the protocol level. (Being quantified in the running research pass.) + +### 6.5 What this pins down in the value format _today_ + - Messages must be **length-prefixed / self-delimiting** so they compose into a stream. - Write path **forward-only where possible**, back-patching bounded to within one message → low-latency incremental encode. - **Schema/version negotiated once per stream**, not per message → the per-message schema-hash header is elided after handshake, reclaiming those bytes. @@ -268,32 +296,32 @@ One language defines both sides of the contract — the equivalent of Protobuf's Ranked-in tier per the research (primary = peer-reviewed paper / format author's own spec/rationale; blog = author's technical blog; secondary = reference doc). -| # | Source | Tier | Date | -|---|---|---|---| -| S1 | [Arrow & Parquet Part 1: Primitive Types & Nullability](https://arrow.apache.org/blog/2022/10/05/arrow-parquet-encoding-part-1/) | primary | 2022-10 | -| S2 | [Stream VByte: Faster Byte-Oriented Integer Compression (Lemire, Kurz, Rupp), IPL 2018](https://arxiv.org/abs/1709.08990) | primary | 2018-02 | -| S3 | [Stream VByte: breaking new speed records — Daniel Lemire](https://lemire.me/blog/2017/09/27/stream-vbyte-breaking-new-speed-records-for-integer-compression/) | blog | 2017-09 | -| S4 | [Vectorized VByte Decoding / Masked VByte (Plaisance, Kurz, Lemire)](https://arxiv.org/pdf/1503.07387) | primary | 2015-06 | -| S5 | [Apache Arrow Columnar Format Specification](https://arrow.apache.org/docs/format/Columnar.html) | primary | v1.5 | -| S6 | [Fast Access to Columnar, Hierarchically Nested Data via Code Transformation (PLUR)](https://arxiv.org/pdf/1708.08319) | primary | 2017-11 | -| S7 | [varint-simd — SIMD LEB128 in Rust](https://github.com/as-com/varint-simd) | primary | — | -| S8 | [Dremel: A Decade of Interactive SQL Analysis at Web Scale (VLDB 2020)](https://www.vldb.org/pvldb/vol13/p3461-melnik.pdf) | primary | 2020 | -| S9 | [Cap'n Proto, FlatBuffers, and SBE — author's design rationale](https://capnproto.org/news/2014-06-17-capnproto-flatbuffers-sbe.html) | primary | 2014-06 | -| S10 | [Cap'n Proto Encoding Spec](https://capnproto.org/encoding.html) | primary | — | -| S11 | [LEB128 — Wikipedia](https://en.wikipedia.org/wiki/LEB128) | secondary | — | -| S12 | [An Empirical Evaluation of Columnar Storage Formats (VLDB 2023, CMU)](https://arxiv.org/pdf/2304.05028) | primary | 2023-11 | -| S13 | [Decoding billions of integers per second through vectorization (Lemire & Boytsov, SPE 2015)](https://arxiv.org/pdf/1209.2137) · [Wiley](https://onlinelibrary.wiley.com/doi/full/10.1002/spe.2203) | primary | 2015 | -| S14 | [SFVInt: Simple, Fast and Generic Variable-Length Integer Decoding using Bit Manipulation](https://arxiv.org/html/2403.06898v4) | primary | 2024 | -| S15 | [rust_serialization_benchmark (djkoloski)](https://github.com/djkoloski/rust_serialization_benchmark) | primary | ~2025 | -| S16 | [buffer-benchmarks — Protobuf/FlatBuffers/Cap'n Proto on Go & Rust](https://github.com/kcchu/buffer-benchmarks) | blog | 2023-01 | -| S17 | [FlatBuffers Official Benchmarks](https://flatbuffers.dev/benchmarks/) | primary | — | -| S18 | [Streaming Technologies and Serialization Protocols: Empirical Performance Analysis (arXiv 2407.13494)](https://arxiv.org/html/2407.13494v2) | primary | 2024-07 | -| S19 | [Data Formats in Analytical DBMSs: Performance Trade-offs and Future Directions](https://arxiv.org/pdf/2411.14331) | primary | 2024-11 | -| S20 | [Real Zero-Copy: A Technical Autopsy of Cap'n Proto](https://dev.to/rafacalderon/real-zero-copy-a-technical-autopsy-of-capn-proto-and-the-serialization-fallacy-3n64) | blog | — | -| S21 | [Tagged union — Wikipedia (discriminant encoding/packing)](https://en.wikipedia.org/wiki/Tagged_union) | secondary | — | -| S22 | [FlatBuffers White Paper (design rationale)](https://flatbuffers.dev/white_paper/) | primary | — | -| S23 | [FlatBuffers Schema Evolution rules](https://flatbuffers.dev/evolution/) | primary | — | -| S24 | [flatcc — FlatBuffers Security (verify-on-access attack surface)](https://github.com/dvidelabs/flatcc/blob/master/doc/security.md) | primary | — | -| S25 | [Cap'n Proto FAQ (validation-as-anti-feature)](https://capnproto.org/faq.html) | primary | — | +| # | Source | Tier | Date | +| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- | ------- | +| S1 | [Arrow & Parquet Part 1: Primitive Types & Nullability](https://arrow.apache.org/blog/2022/10/05/arrow-parquet-encoding-part-1/) | primary | 2022-10 | +| S2 | [Stream VByte: Faster Byte-Oriented Integer Compression (Lemire, Kurz, Rupp), IPL 2018](https://arxiv.org/abs/1709.08990) | primary | 2018-02 | +| S3 | [Stream VByte: breaking new speed records — Daniel Lemire](https://lemire.me/blog/2017/09/27/stream-vbyte-breaking-new-speed-records-for-integer-compression/) | blog | 2017-09 | +| S4 | [Vectorized VByte Decoding / Masked VByte (Plaisance, Kurz, Lemire)](https://arxiv.org/pdf/1503.07387) | primary | 2015-06 | +| S5 | [Apache Arrow Columnar Format Specification](https://arrow.apache.org/docs/format/Columnar.html) | primary | v1.5 | +| S6 | [Fast Access to Columnar, Hierarchically Nested Data via Code Transformation (PLUR)](https://arxiv.org/pdf/1708.08319) | primary | 2017-11 | +| S7 | [varint-simd — SIMD LEB128 in Rust](https://github.com/as-com/varint-simd) | primary | — | +| S8 | [Dremel: A Decade of Interactive SQL Analysis at Web Scale (VLDB 2020)](https://www.vldb.org/pvldb/vol13/p3461-melnik.pdf) | primary | 2020 | +| S9 | [Cap'n Proto, FlatBuffers, and SBE — author's design rationale](https://capnproto.org/news/2014-06-17-capnproto-flatbuffers-sbe.html) | primary | 2014-06 | +| S10 | [Cap'n Proto Encoding Spec](https://capnproto.org/encoding.html) | primary | — | +| S11 | [LEB128 — Wikipedia](https://en.wikipedia.org/wiki/LEB128) | secondary | — | +| S12 | [An Empirical Evaluation of Columnar Storage Formats (VLDB 2023, CMU)](https://arxiv.org/pdf/2304.05028) | primary | 2023-11 | +| S13 | [Decoding billions of integers per second through vectorization (Lemire & Boytsov, SPE 2015)](https://arxiv.org/pdf/1209.2137) · [Wiley](https://onlinelibrary.wiley.com/doi/full/10.1002/spe.2203) | primary | 2015 | +| S14 | [SFVInt: Simple, Fast and Generic Variable-Length Integer Decoding using Bit Manipulation](https://arxiv.org/html/2403.06898v4) | primary | 2024 | +| S15 | [rust_serialization_benchmark (djkoloski)](https://github.com/djkoloski/rust_serialization_benchmark) | primary | ~2025 | +| S16 | [buffer-benchmarks — Protobuf/FlatBuffers/Cap'n Proto on Go & Rust](https://github.com/kcchu/buffer-benchmarks) | blog | 2023-01 | +| S17 | [FlatBuffers Official Benchmarks](https://flatbuffers.dev/benchmarks/) | primary | — | +| S18 | [Streaming Technologies and Serialization Protocols: Empirical Performance Analysis (arXiv 2407.13494)](https://arxiv.org/html/2407.13494v2) | primary | 2024-07 | +| S19 | [Data Formats in Analytical DBMSs: Performance Trade-offs and Future Directions](https://arxiv.org/pdf/2411.14331) | primary | 2024-11 | +| S20 | [Real Zero-Copy: A Technical Autopsy of Cap'n Proto](https://dev.to/rafacalderon/real-zero-copy-a-technical-autopsy-of-capn-proto-and-the-serialization-fallacy-3n64) | blog | — | +| S21 | [Tagged union — Wikipedia (discriminant encoding/packing)](https://en.wikipedia.org/wiki/Tagged_union) | secondary | — | +| S22 | [FlatBuffers White Paper (design rationale)](https://flatbuffers.dev/white_paper/) | primary | — | +| S23 | [FlatBuffers Schema Evolution rules](https://flatbuffers.dev/evolution/) | primary | — | +| S24 | [flatcc — FlatBuffers Security (verify-on-access attack surface)](https://github.com/dvidelabs/flatcc/blob/master/doc/security.md) | primary | — | +| S25 | [Cap'n Proto FAQ (validation-as-anti-feature)](https://capnproto.org/faq.html) | primary | — | _Additional benchmark corpora consulted: [JS/TS serialization benchmark](https://github.com/Adelost/javascript-serialization-benchmark), [Protobuf vs MessagePack vs CBOR vs FlatBuffers](https://medium.com/@the_atomic_architect/your-api-isnt-slow-your-payload-is-protobuf-vs-messagepack-vs-cbor-vs-flatbuffers-benchmarked-ca6d0193477c)._ diff --git a/docs/specs/tdbin-future-columnar.md b/docs/specs/tdbin-future-columnar.md new file mode 100644 index 0000000..7256fb3 --- /dev/null +++ b/docs/specs/tdbin-future-columnar.md @@ -0,0 +1,28 @@ +# TDBIN Future Columnar Specification + +> Status: roadmap spec for `[TDBIN-FUTURE-COLUMNAR]`. +> Depends on: [tdbin-wire-format.md](tdbin-wire-format.md). + +## Scope + +`[TDBIN-FUTURE-COLUMNAR]` defines columnar encodings for list-heavy schemas: +validity bitmaps, struct-of-arrays record lists, dense-union columns, and SIMD +integer blocks. + +## Requirements + +- Columnar lists MUST be schema-selected and layout-hashed so row and column + encodings cannot be confused. +- Nullable columns MUST use a validity bitmap with bit 0 assigned to element 0. +- Dense union columns MUST store the discriminant column separately from payload + columns and MUST zero inactive payload lanes. +- Integer columns MAY use SIMD-BP128 blocks only when the element count and CPU + feature checks make the fallback unambiguous. +- Readers MUST always support a scalar fallback path. + +## Acceptance + +- A list-heavy benchmark corpus entry uses this encoding. +- Golden vectors include bitmap edge cases, empty columns, partial final blocks, + and unknown union variants. +- Benchmarks prove whether the columnar path closes `[TDBIN-BENCH-GATE]`. diff --git a/docs/specs/tdbin-future-reader.md b/docs/specs/tdbin-future-reader.md new file mode 100644 index 0000000..c802458 --- /dev/null +++ b/docs/specs/tdbin-future-reader.md @@ -0,0 +1,27 @@ +# TDBIN Future Reader Specification + +> Status: roadmap spec for `[TDBIN-FUTURE-READER]`. +> Depends on: [tdbin-wire-format.md](tdbin-wire-format.md), [tdbin-rust-api.md](tdbin-rust-api.md). + +## Scope + +`[TDBIN-FUTURE-READER]` adds a verified zero-copy reader for generated Rust ADTs. +The reader verifies a framed message once, then exposes typed accessors that +borrow directly from the input bytes. + +## Requirements + +- Verification MUST run all `[TDBIN-SAFE-*]` checks before any accessor is + constructed. +- Accessors MUST NOT allocate for scalar, enum, string, bytes, or pointer lookup. +- String accessors MUST return `&str` after `[TDBIN-SAFE-UTF8]` validation. +- Unknown union variants MUST remain typed errors carrying the ordinal. +- The existing materializing `TdBin::from_bytes` path MUST stay available. + +## Acceptance + +- Golden vectors are shared with the materializing reader. +- Tests cover valid access, invalid pointer targets, invalid UTF-8, unknown + variants, depth limits, and packed framed messages. +- Benchmarks compare verify-once plus repeated accessor reads against + materializing decode. diff --git a/docs/specs/tdbin-future-typescript.md b/docs/specs/tdbin-future-typescript.md new file mode 100644 index 0000000..6bb585c --- /dev/null +++ b/docs/specs/tdbin-future-typescript.md @@ -0,0 +1,25 @@ +# TDBIN Future TypeScript Codec Specification + +> Status: roadmap spec for `[TDBIN-FUTURE-TS]`. +> Depends on: [tdbin-wire-format.md](tdbin-wire-format.md). + +## Scope + +`[TDBIN-FUTURE-TS]` adds a TypeScript TDBIN codec emitted by +`packages/typediagram` from the same typeDiagram model used by Rust codegen. + +## Requirements + +- Generated TypeScript codecs MUST round-trip every Rust golden vector byte for + byte. +- The hot path MUST use `DataView`/`Uint8Array` over structured reflection. +- Decode MUST return typed errors, not throw for malformed input. +- The implementation MUST support framed and packed messages before release. +- Browser and Node behavior MUST be identical. + +## Acceptance + +- Golden-vector conformance tests run in `packages/typediagram`. +- Cross-language fixtures prove Rust encode -> TypeScript decode -> Rust encode + byte identity and the reverse. +- Bundle-size impact is measured and kept under the package budget. diff --git a/docs/specs/tdbin-future-width-types.md b/docs/specs/tdbin-future-width-types.md new file mode 100644 index 0000000..003c0d7 --- /dev/null +++ b/docs/specs/tdbin-future-width-types.md @@ -0,0 +1,26 @@ +# TDBIN Future Width Types Specification + +> Status: roadmap spec for `[TDBIN-FUTURE-WIDTH-TYPES]` and `[TDBIN-FUTURE-ORDINALS]`. +> Depends on: [tdbin-wire-format.md](tdbin-wire-format.md), [converters.md](converters.md). + +## Scope + +`[TDBIN-FUTURE-WIDTH-TYPES]` adds width-refined numeric DSL types such as `I8`, +`U16`, `U32`, `F32`, and explicit enum/union ordinals. + +## Requirements + +- Width-refined integers MUST map to the reserved list element widths already + defined by `[TDBIN-PTR-LIST]`. +- `F32` MUST encode IEEE-754 binary32 little-endian. +- Generated language types MUST use the closest checked native type available. +- Explicit ordinals MUST be unique, stable, and rejected when outside the + encoded width. +- Width crossings MUST be classified as breaking evolution + (`[TDBIN-EVOLVE-WIDTH]`). + +## Acceptance + +- Parser, model, converters, Rust codegen, and TDBIN tests cover every width. +- Golden vectors pin scalar fields, lists, and enum-list ordinal bounds. +- Protobuf conversion documents any lossy width mapping explicitly. diff --git a/docs/specs/tdbin-rust-api.md b/docs/specs/tdbin-rust-api.md index 86c61d7..0bd3f07 100644 --- a/docs/specs/tdbin-rust-api.md +++ b/docs/specs/tdbin-rust-api.md @@ -46,7 +46,7 @@ pub trait TdBin: Struct { // blanket impl for (`[TDBIN-RS-NOPANIC]`). - `to_bytes` is deterministic/canonical (`[TDBIN-ENC-CANON]`): the same value always yields the same bytes, and `bytes → object → bytes` is byte-identical. -- **The ADT types *and* their codec are produced by typeDiagram codegen — never hand-written.** +- **The ADT types _and_ their codec are produced by typeDiagram codegen — never hand-written.** `packages/typediagram/src/converters/rust.ts` emits the `struct`/`enum`; `rust-tdbin.ts` (`generateRustModule`) emits the `impl tdbin::Struct`. `crates/tdbin/tests/generated/mod.rs` is a checked-in example of that output, round-tripped by `tests/roundtrip.rs` under `cargo test`. @@ -60,11 +60,11 @@ Phase 2+ (`[TDBIN-MSG-FRAME]`, `[TDBIN-PRIM-MAP]`). > ⚠️ **Optional extra, off the hot path.** The `TypeDef` / `TypeRef` schema model and the dynamic > `Value` codec (`build_schema` / `encode` / `decode` / `verify`) described here are a **tooling -> feature** — for programs that want to inspect a model's structure, or encode/decode *without* +> feature** — for programs that want to inspect a model's structure, or encode/decode _without_ > generated types. They are **explicitly NOT the core serialization path** and are **not required** > to round-trip typeDiagram ADTs; the direct typed `Struct` / `TdBin` path above owns that, and it > is what makes TDBIN fast (no reflective `Value` hop). This reflective model is a later, separable -> deliverable (plan Phase 5, `[TDBIN-FUTURE-*]`); it targets the *same* bytes, so the two paths +> deliverable (plan Phase 5, `[TDBIN-FUTURE-*]`); it targets the _same_ bytes, so the two paths > interoperate. Nothing below is implemented in v0. The reflective/dynamic API is plain functions returning `Result` — no classes, no global state: @@ -131,18 +131,23 @@ Four `#[non_exhaustive]` `thiserror` enums; every variant carries actionable con Tests are black-box over the public API, deterministic, assertion-dense, and merged (no per-assertion splitting). Each test name references its spec ID. ### [TDBIN-TEST-ROUNDTRIP] + One comprehensive round-trip test per schema corpus entry: build a **complex** schema (nested records, a recursive tree, every primitive, unions with bare + named + tuple + pinned variants, the full `Option` matrix, `List>`, generics `Pair`/`Result`, unicode strings, empty lists/strings) → `encode` (bare, framed, packed × unpacked) → `verify` → `decode` → deep-equality with the input, PLUS in the same test: exact expected byte lengths, packed ≤ unpacked, defaults round-trip as `None`/zero, field-order-independence of `Record.fields`, and re-encode determinism (`[TDBIN-ENC-CANON]`). ### [TDBIN-TEST-GOLDEN] + Golden vectors: for each corpus schema+value, the exact wire bytes as hex fixtures asserted byte-for-byte both directions. These fixtures are the future cross-language conformance suite (`[TDBIN-FUTURE-TS]`) — they MUST never change without a wire-format version bump. ### [TDBIN-TEST-EVIL] + Adversarial corpus, all asserting **typed errors, never panics**: truncation at every byte boundary of a golden message; every pointer field perturbed (offset out of bounds, reserved kinds, oversized sections); composite tag count mismatches; depth bombs (> 64); amplification bombs (aliased fan-out); invalid UTF-8; packed streams truncated mid-run; wrong magic/version/hash; unknown discriminants (asserting `UnknownVariant` specifically). ### [TDBIN-TEST-EVOLVE] + Evolution suite: encode with schema v1, decode with v1+appended-field / appended-variant schema (defaults surface, `[TDBIN-EVOLVE-APPEND]`) and the reverse (extra data ignored, `[TDBIN-REC-SHORT]`); plus a width-crossing case asserting the documented breaking behavior (`[TDBIN-EVOLVE-WIDTH]` — hash mismatch on framed messages). ### [TDBIN-TEST-FUZZ] + `cargo-fuzz` target: `decode(arbitrary bytes)` on a fixed corpus schema — no panics, no timeouts, no OOM (bounded by `DecodeOptions`). Run in CI on a time budget. --- @@ -150,10 +155,13 @@ Evolution suite: encode with schema v1, decode with v1+appended-field / appended ## [TDBIN-BENCH] The gate that makes "smaller AND faster than Protobuf" enforceable ### [TDBIN-BENCH-CORPUS] + A fixed benchmark corpus of ≥ 3 realistic payload shapes defined in **both** typeDiagram and `.proto`: (a) a record-heavy document (typeDiagram's own diagram model), (b) a union-heavy event stream (many small tagged messages), (c) a list-heavy dataset (structs with numeric/string columns). Same logical values on both sides. ### [TDBIN-BENCH-GATE] + Criterion benches comparing `tdbin` against `prost` on the corpus. The gate (CI-checked, not vibes): + - **Size:** TDBIN packed framed bytes ≤ Protobuf encoded bytes on every corpus entry. - **Speed:** TDBIN `encode` and `decode` each ≥ 1.5× the throughput of prost's on every corpus entry (target headroom; the roadmap zero-copy reader raises this to order-of-magnitude on reads, research §2). - Regressions against the recorded baseline fail the build. Numbers are recorded in the bench report committed with the change. diff --git a/docs/specs/tdbin-wire-format.md b/docs/specs/tdbin-wire-format.md index ed19775..7c387c5 100644 --- a/docs/specs/tdbin-wire-format.md +++ b/docs/specs/tdbin-wire-format.md @@ -13,46 +13,52 @@ All statements marked **MUST** are normative. Every normative rule lives under a ## [TDBIN-WIRE] Ground rules ### [TDBIN-WIRE-WORD] + - The unit of layout is the **word**: 8 bytes. - All multi-byte values MUST be **little-endian**. Bit fields MUST use **little-endian bit order** (bit 0 = least-significant bit of the byte at the lowest address). - Every object (struct body, list body) MUST begin on a word boundary within the message body. ### [TDBIN-WIRE-LIMITS] + Hard limits; a message exceeding any of them is invalid: -| Limit | Value | Where enforced | -|---|---|---| -| Body size | ≤ 2³² − 1 bytes | `[TDBIN-MSG-FRAME]` | -| Struct data section | ≤ 2¹⁶ − 1 words | `[TDBIN-PTR-STRUCT]` | -| Struct pointer section | ≤ 2¹⁶ − 1 slots | `[TDBIN-PTR-STRUCT]` | -| List element count | ≤ 2²⁹ − 1 | `[TDBIN-PTR-LIST]` | -| Composite list total | ≤ 2²⁹ − 1 words | `[TDBIN-LIST-COMPOSITE]` | -| Pointer depth | ≤ 64 | `[TDBIN-SAFE-DEPTH]` | -| Union variants | ≤ 2¹⁶ | `[TDBIN-UNION-DISC]` | + +| Limit | Value | Where enforced | +| ---------------------- | --------------- | ------------------------ | +| Body size | ≤ 2³² − 1 bytes | `[TDBIN-MSG-FRAME]` | +| Struct data section | ≤ 2¹⁶ − 1 words | `[TDBIN-PTR-STRUCT]` | +| Struct pointer section | ≤ 2¹⁶ − 1 slots | `[TDBIN-PTR-STRUCT]` | +| List element count | ≤ 2²⁹ − 1 | `[TDBIN-PTR-LIST]` | +| Composite list total | ≤ 2²⁹ − 1 words | `[TDBIN-LIST-COMPOSITE]` | +| Pointer depth | ≤ 64 | `[TDBIN-SAFE-DEPTH]` | +| Union variants | ≤ 2¹⁶ | `[TDBIN-UNION-DISC]` | --- ## [TDBIN-MSG] Message envelope ### [TDBIN-MSG-BARE] + A **bare message** is a sequence of words. Word 0 MUST be the **root pointer**: a struct pointer (`[TDBIN-PTR-STRUCT]`) to the root object. All pointer targets MUST lie within the message body (single segment in v1; multi-segment far pointers are reserved, `[TDBIN-PTR-RESERVED]`). ### [TDBIN-MSG-FRAME] + A **framed message** wraps a bare (optionally packed) body for transport and streams: -| Offset | Size | Field | Rule | -|---|---|---|---| -| 0 | 4 | magic | bytes `0x54 0x44 0x42 0x31` (`"TDB1"`) | -| 4 | 1 | version | `1` | -| 5 | 1 | flags | bit 0 `PACKED` (`[TDBIN-PACK]`), bit 1 `HASH`; other bits MUST be 0 | -| 6 | 2 | reserved | MUST be 0 | -| 8 | 4 | body_len | u32 LE, byte length of `body` **as it appears on the wire** (post-packing when `PACKED`) | -| 12 | 8 | schema_hash | u64 LE (`[TDBIN-SCHEMA-HASH]`); present iff `HASH` flag set | -| 12 or 20 | body_len | body | bare message, packed when `PACKED` | +| Offset | Size | Field | Rule | +| -------- | -------- | ----------- | ---------------------------------------------------------------------------------------- | +| 0 | 4 | magic | bytes `0x54 0x44 0x42 0x31` (`"TDB1"`) | +| 4 | 1 | version | `1` | +| 5 | 1 | flags | bit 0 `PACKED` (`[TDBIN-PACK]`), bit 1 `HASH`; other bits MUST be 0 | +| 6 | 2 | reserved | MUST be 0 | +| 8 | 4 | body_len | u32 LE, byte length of `body` **as it appears on the wire** (post-packing when `PACKED`) | +| 12 | 8 | schema_hash | u64 LE layout hash (`[TDBIN-SCHEMA-HASH]`); present iff `HASH` flag set | +| 12 or 20 | body_len | body | bare message, packed when `PACKED` | Readers MUST reject wrong magic, unknown version, nonzero reserved bits/fields, and `body_len` disagreeing with available bytes. ### [TDBIN-MSG-STREAM] -Framing is what makes the RPC/streaming roadmap work (research §6.5): messages are self-delimiting via `body_len`, so they concatenate into a stream with no delimiters. On a stream, the schema hash MUST be negotiated **once per stream** (first frame carries `HASH`; subsequent frames elide it). Stream-level concerns (multiplexing, flow control, method dispatch, promise pipelining) belong to the future `[TDRPC-*]` spec, not this one — but this envelope is the frame it will carry. + +Framing is what makes the RPC/streaming roadmap work (research §6.5): messages are self-delimiting via `body_len`, so they concatenate into a stream with no delimiters. On a stream, the layout hash MUST be negotiated **once per stream** (first frame carries `HASH`; subsequent frames elide it). The hash is a wire-compatibility guard, not an exact schema-text identity check: append-compatible schema releases keep the same declared layout major and therefore the same stream-level compatibility identity, while exact schema text is tracked separately for tooling (`[TDBIN-SCHEMA-HASH]`). Stream-level concerns (multiplexing, flow control, method dispatch, promise pipelining) belong to the future `[TDRPC-*]` spec, not this one — but this envelope is the frame it will carry. --- @@ -61,40 +67,44 @@ Framing is what makes the RPC/streaming roadmap work (research §6.5): messages A pointer is one word. Bits 0–1 select the kind: `00` struct, `01` list, `10`/`11` reserved. ### [TDBIN-PTR-NULL] + An all-zero word in a pointer slot is the **null pointer**: the field takes its schema default (empty string/bytes/list, default record, `None`). Writers MUST encode absent pointer fields as null. ### [TDBIN-PTR-STRUCT] -| Bits | Field | Meaning | -|---|---|---| -| 0–1 | kind | `00` | -| 2–31 | offset | signed 30-bit count of **words** from the end of the pointer word to the start of the target's data section | -| 32–47 | data_words | u16: size of the data section in words | -| 48–63 | ptr_words | u16: number of pointer slots following the data section | + +| Bits | Field | Meaning | +| ----- | ---------- | ----------------------------------------------------------------------------------------------------------- | +| 0–1 | kind | `00` | +| 2–31 | offset | signed 30-bit count of **words** from the end of the pointer word to the start of the target's data section | +| 32–47 | data_words | u16: size of the data section in words | +| 48–63 | ptr_words | u16: number of pointer slots following the data section | The target object is `data_words` words of scalar data followed by `ptr_words` pointer words. ### [TDBIN-PTR-LIST] -| Bits | Field | Meaning | -|---|---|---| -| 0–1 | kind | `01` | -| 2–31 | offset | signed 30-bit words from end of pointer word to first element (or to the tag word for composite) | -| 32–34 | elem | element kind, table below | -| 35–63 | count | u29: element count, EXCEPT composite (`elem=7`): total words excluding the tag word | - -| elem | Element | Used by | -|---|---|---| -| 0 | void (0 bits) | `List` | -| 1 | 1 bit | `List` (bit-packed, `[TDBIN-WIRE-WORD]` bit order) | -| 2 | 1 byte | `String`, `Bytes`, `List` (`[TDBIN-LIST-ELEM]`) | -| 3 | 2 bytes | reserved for width-refined ints (`[TDBIN-FUTURE-WIDTH-TYPES]`) | -| 4 | 4 bytes | reserved for width-refined ints/floats | -| 5 | 8 bytes | `List`, `List`, `List` | -| 6 | pointer | `List`, `List`, `List>`, `List`, `List` | -| 7 | composite | inline struct elements (`[TDBIN-LIST-COMPOSITE]`) | + +| Bits | Field | Meaning | +| ----- | ------ | ------------------------------------------------------------------------------------------------ | +| 0–1 | kind | `01` | +| 2–31 | offset | signed 30-bit words from end of pointer word to first element (or to the tag word for composite) | +| 32–34 | elem | element kind, table below | +| 35–63 | count | u29: element count, EXCEPT composite (`elem=7`): total words excluding the tag word | + +| elem | Element | Used by | +| ---- | ------------- | ----------------------------------------------------------------------------- | +| 0 | void (0 bits) | `List` | +| 1 | 1 bit | `List` (bit-packed, `[TDBIN-WIRE-WORD]` bit order) | +| 2 | 1 byte | `String`, `Bytes`, `List` (`[TDBIN-LIST-ELEM]`) | +| 3 | 2 bytes | reserved for width-refined ints (`[TDBIN-FUTURE-WIDTH-TYPES]`) | +| 4 | 4 bytes | reserved for width-refined ints/floats | +| 5 | 8 bytes | `List`, `List`, `List` | +| 6 | pointer | `List`, `List`, `List>`, `List`, `List` | +| 7 | composite | inline struct elements (`[TDBIN-LIST-COMPOSITE]`) | List bodies MUST be zero-padded to a word boundary. ### [TDBIN-PTR-RESERVED] + Kind `10` is reserved for **far pointers** (multi-segment messages). Kind `11` is reserved for **capabilities** (the RPC layer's remote-object references — research §6.4 promise pipelining). Readers MUST reject reserved kinds in v1. --- @@ -102,25 +112,28 @@ Kind `10` is reserved for **far pointers** (multi-segment messages). Kind `11` i ## [TDBIN-PRIM] Primitive types (DSL → wire) ### [TDBIN-PRIM-MAP] + typeDiagram built-ins map to exactly these wire representations: -| DSL | Wire | Width | -|---|---|---| -| `Bool` | 1 bit in the data section | 1 bit | -| `Int` | two's-complement i64 LE | 64 bits | -| `Float` | IEEE-754 binary64 LE | 64 bits | -| `String` | pointer → byte list, UTF-8, **no NUL terminator** | ptr slot | -| `Bytes` | pointer → byte list | ptr slot | -| `Unit` | nothing (zero bits, no slot) | 0 | -| `DateTime` | i64 LE microseconds since Unix epoch, UTC | 64 bits | -| `Uuid` | 16 bytes, RFC 4122 big-endian byte order (the canonical textual order) | 128 bits | -| `Decimal` | 16 bytes: i96 LE unsigned mantissa (bytes 0–11), scale u8 (byte 12, 0–28), flags u8 (byte 13, bit 7 = sign), bytes 14–15 zero | 128 bits | -| enum-union (`[TDBIN-UNION-ENUM]`) | discriminant bit field | 1/2/4/8/16 bits | +| DSL | Wire | Width | +| --------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- | --------------- | +| `Bool` | 1 bit in the data section | 1 bit | +| `Int` | two's-complement i64 LE | 64 bits | +| `Float` | IEEE-754 binary64 LE | 64 bits | +| `String` | pointer → byte list, UTF-8, **no NUL terminator** | ptr slot | +| `Bytes` | pointer → byte list | ptr slot | +| `Unit` | nothing (zero bits, no slot) | 0 | +| `DateTime` | i64 LE microseconds since Unix epoch, UTC | 64 bits | +| `Uuid` | 16 bytes, RFC 4122 big-endian byte order (the canonical textual order) | 128 bits | +| `Decimal` | 16 bytes: i96 LE unsigned mantissa (bytes 0–11), scale u8 (byte 12, 0–28), flags u8 (byte 13, bit 7 = sign), bytes 14–15 zero | 128 bits | +| enum-union (`[TDBIN-UNION-ENUM]`) | discriminant bit field | 1/2/4/8/16 bits | `String` payloads MUST be valid UTF-8 (`[TDBIN-SAFE-UTF8]`). Width-refined numeric DSL types (`I8…U64`, `F32`) are a schema-language extension (`[TDBIN-FUTURE-WIDTH-TYPES]`); the wire format already reserves their widths and list element kinds. ### [TDBIN-PRIM-OPTION] + `Option` is built in and layout-frozen (it can never evolve, so inlining is safe — the exception to `[TDBIN-UNION-STRUCT]`): + - **T is pointer-typed** (String, Bytes, List, record, union): the field is one pointer slot; **null pointer = `None`**. Zero overhead. - **T is scalar** (Bool, Int, Float, DateTime, Uuid, Decimal, enum): a 1-bit **presence flag** plus a T-width value slot, both allocated by `[TDBIN-REC-ALLOC]` in that order. Presence 0 ⇒ `None` and the value slot MUST be zero. - **T is `Unit`**: presence bit only. @@ -132,9 +145,11 @@ typeDiagram built-ins map to exactly these wire representations: ## [TDBIN-REC] Records (product types) ### [TDBIN-REC-SECTIONS] + A record encodes as a struct: a **data section** (bit-packed scalars) followed by a **pointer section** (one word per pointer field), per `[TDBIN-PTR-STRUCT]`. Nested record- and union-typed fields are **pointer-typed** — always a separate struct reached by pointer, never inlined. This keeps every type's layout independent (evolution) and makes recursive types (trees, lists) representable. ### [TDBIN-REC-ALLOC] + Field positions are a **pure function of the schema** — no tags on the wire. The layout algorithm: 1. Assign each field an **ordinal** = its declaration index (0-based, textual order). @@ -146,9 +161,11 @@ Field positions are a **pure function of the schema** — no tags on the wire. T Determinism of this algorithm is what golden vectors (`[TDBIN-TEST-GOLDEN]`) pin down. ### [TDBIN-REC-XOR] + Every scalar field is stored **XOR'd with the w-bit representation of its schema default**. typeDiagram currently defines all defaults as the zero value, so today's stored bytes equal the raw values — but the XOR rule is normative now so a future DSL default-value annotation changes no wire logic, and defaulted fields always encode as zeros that `[TDBIN-PACK]` deletes (research §3.4). ### [TDBIN-REC-SHORT] + Readers MUST accept a struct whose `data_words`/`ptr_words` are **smaller or larger** than the reader's schema expects. Fields beyond the actual sections read as default (all-zero ⇒ XOR gives the default). Extra sections are ignored on read but MUST be preserved by the verifier's bounds accounting. This is what makes `[TDBIN-EVOLVE-APPEND]` bidirectionally compatible. --- @@ -156,27 +173,33 @@ Readers MUST accept a struct whose `data_words`/`ptr_words` are **smaller or lar ## [TDBIN-UNION] Tagged unions (sum types) ### [TDBIN-UNION-STRUCT] + A named `union` type encodes as a struct of its own (reached by pointer, like any record): a **discriminant** bit field allocated first, then each variant's payload fields. There are no other fields in a union struct. ### [TDBIN-UNION-DISC] + - The discriminant value is the variant's **declaration ordinal** (0-based). DSL-pinned values (`ParseError = -32700`) are a codegen-surface mapping and MUST NOT appear on the wire. - Discriminant width = the smallest w ∈ {1, 2, 4, 8, 16} with 2ʷ ≥ capacity, where **capacity** = variant count (or a schema-declared reserved capacity ≥ variant count, once the schema language grows a reserve annotation — until then capacity = variant count). A 2-variant union costs **1 bit**; ≤ 4 variants cost 2 bits (research §3.3 — vs Protobuf's ≥ 2 bytes for `oneof`). - More than 2¹⁶ variants is a schema error. ### [TDBIN-UNION-OVERLAP] + Variant payload fields are laid out by `[TDBIN-REC-ALLOC]` with one change: intervals and pointer slots allocated by **other variants of the same union are treated as free** (only one variant is ever live). Allocation order is global and deterministic: variants in declaration order, fields within a variant in declaration order. Tuple-form payloads (`Number(Int)`) are positional fields ordinal 0, 1, …. Writers MUST zero all slots belonging to inactive variants (`[TDBIN-SAFE-ZEROSLOT]`). ### [TDBIN-UNION-ENUM] -A union whose variants are **all bare** (no payloads) is an **enum-union**: it is NOT pointer-encoded. As a field it inlines directly into the parent's data section as a scalar of the discriminant width; in lists it occupies 1 byte per element (`[TDBIN-LIST-ELEM]`). Its width is a pure function of its own definition, so parents' layouts shift only if the enum's width changes — governed by `[TDBIN-EVOLVE-WIDTH]`. + +A union whose variants are **all bare** (no payloads) is an **enum-union**: it is NOT pointer-encoded. As a field it inlines directly into the parent's data section as a scalar of the discriminant width; in lists it occupies 1 byte per element (`[TDBIN-LIST-ELEM]`). The encoding class is layout-pinned when the type is published: an enum-union stays enum-encoded for that schema major, and a struct-union stays pointer/struct encoded. Adding the first payload variant to an enum-union would flip the encoding class, so it is breaking (`[TDBIN-EVOLVE-BREAKING]`). Its width is a pure function of its own definition, so parents' layouts shift only if the enum's width changes — governed by `[TDBIN-EVOLVE-WIDTH]`. ### [TDBIN-UNION-UNKNOWN] -A discriminant ≥ the reader's known variant count (a newer writer) is **not** a structural error: the verifier MUST still pass the message (all pointer slots are verified regardless of liveness, `[TDBIN-SAFE-ZEROSLOT]`), and decode MUST surface a typed `UnknownVariant { type_name, ordinal }` error — never a panic, never silent misreading. + +A discriminant ≥ the reader's known variant count (a newer writer) is **not** a structural error: the verifier MUST still bounds-check and pointer-check the message (`[TDBIN-SAFE-ZEROSLOT]`), and decode MUST surface a typed `UnknownVariant { type_name, ordinal }` error — never a panic, never silent misreading. --- ## [TDBIN-LIST] Lists ### [TDBIN-LIST-ELEM] + - `List`: elem 1, bit-packed. - `List / List / List`: elem 5, raw 8-byte values. - `List / List`: composite (elem 7) with data_words = 2, ptr_words = 0. @@ -186,9 +209,11 @@ A discriminant ≥ the reader's known variant count (a newer writer) is **not** - `List` and `List`: composite, `[TDBIN-LIST-COMPOSITE]`. ### [TDBIN-LIST-RAW] + List elements are stored **raw** — `[TDBIN-REC-XOR]` does NOT apply inside list bodies (uniform elements keep the SIMD path branch-free; research §1 Regime C: keep the decode path uniform). ### [TDBIN-LIST-COMPOSITE] + A composite list body begins with one **tag word** shaped like a struct pointer (`[TDBIN-PTR-STRUCT]`) whose offset field instead holds the **element count**; its `data_words`/`ptr_words` give every element's struct size. Elements follow back-to-back, each `data_words + ptr_words` words. The list pointer's count field holds total words excluding the tag word, which MUST equal element count × (data_words + ptr_words). --- @@ -198,9 +223,11 @@ A composite list body begins with one **tag word** shaped like a struct pointer Applied to the whole body when the `PACKED` flag is set (research §3.4 — worst case 2 bytes per 2 KiB; deletes the zeros produced by padding + XOR-default). It is the Cap'n Proto packing scheme: ### [TDBIN-PACK-WORD] + Each word becomes: 1 **tag byte** — bit n set ⇔ byte n of the word is nonzero — followed by the nonzero bytes only, in order. ### [TDBIN-PACK-RUNS] + - Tag `0x00` is followed by one count byte N: N **additional** all-zero words follow the current zero word (run of N+1 zero words total). - Tag `0xFF` is followed by the word's 8 literal bytes, then one count byte N, then N words verbatim (uncompressible run passthrough). @@ -213,20 +240,26 @@ Unpackers MUST bounds-check every read, MUST cap output at the decoder's configu The evolution invariant (research §3.7): **a field's position and width depend only on its own definition and lower-ordinal definitions.** Any schema change preserving all previously assigned positions/widths is **wire-compatible**; both directions work because short/long structs read correctly (`[TDBIN-REC-SHORT]`) and absent fields decode to defaults (`[TDBIN-REC-XOR]`). ### [TDBIN-EVOLVE-APPEND] + Compatible changes: + - **Append a field at the end of a record.** New allocations come after all existing ones (they may land in existing padding — that is the point). - **Append a bare or payload-carrying variant at the end of a union**, provided the discriminant width does not change (`[TDBIN-EVOLVE-WIDTH]`). - **Rename** a type, field, or variant (layout is positional; this breaks source compatibility only). - Add whole new types. ### [TDBIN-EVOLVE-BREAKING] + Breaking changes (MUST bump the schema major version; the schema hash changes and readers reject mismatched framed messages): + - Remove or reorder fields or variants; insert anywhere but the end. - Change any field's type. +- Change a union's encoding class, including adding the first payload-carrying variant to an enum-union (`[TDBIN-UNION-ENUM]`). - Add a field to an **existing** union variant (it would reorder the global allocation sequence of `[TDBIN-UNION-OVERLAP]`). Per-declaration explicit ordinals are the future escape hatch (`[TDBIN-FUTURE-ORDINALS]`). - Change a default value (stored XOR'd — old data would re-read wrong). ### [TDBIN-EVOLVE-WIDTH] + Growing a union/enum past its discriminant-width capacity (e.g. variant 5 of a 4-capacity union) changes the width and therefore every dependent layout: **breaking**. Schemas expecting growth should declare reserved capacity (`[TDBIN-UNION-DISC]`). --- @@ -234,52 +267,70 @@ Growing a union/enum past its discriminant-width capacity (e.g. variant 5 of a 4 ## [TDBIN-SCHEMA] Schema identity ### [TDBIN-SCHEMA-MONO] + Generic types (`Pair`, `Option`, `List`, `Result`) are **monomorphized** at schema-build time: every concrete instantiation reachable from a root type gets its own layout. Generics never appear on the wire. ### [TDBIN-SCHEMA-ALIAS] + `alias` is transparent: `alias Email = String` encodes exactly as `String` and does not contribute to the schema hash beyond its expansion. ### [TDBIN-SCHEMA-HASH] -The schema hash is **FNV-1a 64-bit** (offset basis `0xcbf29ce484222325`, prime `0x100000001b3`) over the UTF-8 bytes of the canonical schema text `[TDBIN-SCHEMA-CANON]`. + +The framed `schema_hash` field carries a **layout hash**: FNV-1a 64-bit (offset basis `0xcbf29ce484222325`, prime `0x100000001b3`) over the canonical layout text `[TDBIN-SCHEMA-CANON]` for the declared schema major. The layout hash includes only wire-compatibility facts: encoding class, scalar widths and bit offsets, pointer slots, section word counts, union discriminant capacity, list element kinds, and semantic-scalar byte layouts. It excludes names, comments, source formatting, and tooling metadata. Append-compatible releases that keep the same schema major and preserve all previously assigned layout facts keep the same layout hash; breaking changes MUST bump the schema major and therefore change the layout hash. + +Tooling MAY additionally compute an **exact schema text hash** over the full canonical typeDiagram source (names included). That exact hash is for diagnostics, codegen drift checks, and registry lookups; it MUST NOT be used as the framed rejection hash because it would reject append-compatible messages. ### [TDBIN-SCHEMA-CANON] -Canonical schema text: all reachable monomorphized types, aliases expanded, sorted by type name (byte-wise), each rendered with no whitespace as + +Canonical layout text: all reachable monomorphized types, aliases expanded, sorted by stable layout identity, each rendered with no whitespace as `type Name{field:Type,…}` / `union Name{Variant{field:Type,…},Bare,…}` -with fields and variants in ordinal order and type references themselves canonical (monomorphized names render as `Name`). Two schemas are identical for framing purposes iff their canonical texts are byte-equal. +with fields and variants in ordinal order, plus their computed layout facts (`class`, widths, bit offsets, pointer slots, section sizes, and union capacity). Names are retained only as local readability labels before hashing; the layout hash input uses stable ordinal/type identities so a rename does not change the framed compatibility hash. The exact schema text hash, when needed by tooling, uses the full name-preserving canonical typeDiagram text instead. --- ## [TDBIN-ENC] Encoding rules (writer obligations) ### [TDBIN-ENC-ORDER] -The encoder allocates the root struct first, then children in a **preorder DFS following ordinal order**, appending each object after all previously allocated words. Pointer back-patching is bounded to **within the current message** — the write path stays forward-only *between* messages (streaming constraint, research §6.1/§6.5). + +The encoder allocates the root struct first, then children in a **preorder DFS following ordinal order**, appending each object after all previously allocated words. Pointer back-patching is bounded to **within the current message** — the write path stays forward-only _between_ messages (streaming constraint, research §6.1/§6.5). ### [TDBIN-ENC-CANON] + Encoding is **deterministic**: identical (schema, value) pairs MUST produce byte-identical bare bodies. This is required for golden vectors and reproducible hashes. ### [TDBIN-ENC-ZERO] + All unallocated padding, dead union-variant slots, and list tail padding MUST be written as zero — for `[TDBIN-PACK]` efficiency, deterministic output, and so the verifier can validate every pointer slot without knowing union liveness. --- ## [TDBIN-SAFE] Verification (untrusted input) -Verification is a **single O(n) pass** (research §3.8). Decode always verifies; a trusted-path zero-copy reader (`[TDBIN-FUTURE-READER]`) may rely on a prior explicit verify. The verifier proves the buffer is **safe to read** — it does not prove the buffer is the *intended* value (a wrong-typed buffer passing the schema hash check can still decode to garbage values; the hash is the type check, `[TDBIN-MSG-FRAME]`). +Verification is a **single O(n) pass** (research §3.8). Decode always verifies; a trusted-path zero-copy reader (`[TDBIN-FUTURE-READER]`) may rely on a prior explicit verify. The verifier proves the buffer is **safe to read** — it does not prove the buffer is the _intended_ value (a wrong-typed buffer passing the schema hash check can still decode to garbage values; the hash is the type check, `[TDBIN-MSG-FRAME]`). ### [TDBIN-SAFE-BOUNDS] + Every pointer's full target range (data + pointer sections; list body incl. composite tag) MUST lie within the message body. All arithmetic MUST be overflow-checked. Reserved pointer kinds and malformed composite tags (`[TDBIN-LIST-COMPOSITE]` count equation) MUST be rejected. ### [TDBIN-SAFE-DEPTH] + Pointer traversal depth is capped at **64**; deeper messages are rejected (recursion-bomb DoS, research §3.8). ### [TDBIN-SAFE-AMPLIFY] + Total traversed words MUST NOT exceed the body's word count. Aliased pointers (two pointers into the same region) are structurally readable but exceed this budget under fan-out abuse (DAG amplification bombs) and MUST be rejected. ### [TDBIN-SAFE-UTF8] + Every `String` payload is UTF-8-validated during the verify pass, so post-verify access never re-validates. ### [TDBIN-SAFE-ZEROSLOT] -The verifier validates **every** non-null pointer slot in every struct, live or not — legal because writers zero dead slots (`[TDBIN-ENC-ZERO]`). Unknown union discriminants are not rejected (`[TDBIN-UNION-UNKNOWN]`). + +For ordinary records, the verifier validates every non-null pointer slot in the pointer section. For struct-unions with overlapped variant pointer slots, the verifier treats the pointer section as the union of every pointer slot allocated to any variant: + +- If the discriminant is known, pointer slots not allocated to the active variant MUST be null; non-null dead slots are rejected because writers MUST zero them (`[TDBIN-ENC-ZERO]`). +- If the discriminant is unknown, the verifier cannot know liveness, so it validates every non-null pointer slot structurally and lets decode surface `UnknownVariant` (`[TDBIN-UNION-UNKNOWN]`). +- Slot payload typing is still schema-level: a pointer slot validates as a well-formed pointer target, while the generated decoder decides whether the active variant expects that slot. --- @@ -294,15 +345,15 @@ The verifier validates **every** non-null pointer slot in every struct, live or ## Decision trace (research → spec) -| Decision | Research anchor | -|---|---| -| No field tags; layout from schema | §0 tax #1, §3.7 `[S10]` | -| Struct = data + pointer sections, word-aligned | §3.1 `[S10]` | -| XOR-with-default scalars | §3.4 `[S10]` | -| Sub-byte discriminants (⌈log₂N⌉ → pow2 width) | §3.3 `[S21]`, §4.3 | -| Dense payloads, variant overlap | §3.3 `[S5][S6]` | -| Word packing, no block compression | §3.4 `[S10]`, §3.6 `[S12]` | -| Verify O(n) + depth + amplification caps | §3.8 `[S24][S25]` | -| Fixed-width scalars, no scalar varints in v1 | §3.2 (branch mispredicts `[S11]`), §5 Q3 | -| Length-prefixed self-delimiting frames | §6.2/§6.5 | -| Append-only evolution into padding | §3.7 `[S10]` | +| Decision | Research anchor | +| ---------------------------------------------- | ---------------------------------------- | +| No field tags; layout from schema | §0 tax #1, §3.7 `[S10]` | +| Struct = data + pointer sections, word-aligned | §3.1 `[S10]` | +| XOR-with-default scalars | §3.4 `[S10]` | +| Sub-byte discriminants (⌈log₂N⌉ → pow2 width) | §3.3 `[S21]`, §4.3 | +| Dense payloads, variant overlap | §3.3 `[S5][S6]` | +| Word packing, no block compression | §3.4 `[S10]`, §3.6 `[S12]` | +| Verify O(n) + depth + amplification caps | §3.8 `[S24][S25]` | +| Fixed-width scalars, no scalar varints in v1 | §3.2 (branch mispredicts `[S11]`), §5 Q3 | +| Length-prefixed self-delimiting frames | §6.2/§6.5 | +| Append-only evolution into padding | §3.7 `[S10]` | diff --git a/docs/specs/tdrpc.md b/docs/specs/tdrpc.md new file mode 100644 index 0000000..3504a5f --- /dev/null +++ b/docs/specs/tdrpc.md @@ -0,0 +1,31 @@ +# TDRPC Specification + +> Status: roadmap spec for `[TDRPC-*]`. +> Depends on: [tdbin-wire-format.md](tdbin-wire-format.md). + +## Scope + +`[TDRPC-*]` maps typeDiagram function definitions to a streaming RPC service +contract carried by framed TDBIN messages. + +## Contract Model + +- A typeDiagram `function` declaration defines one RPC method. +- The request and response payloads MUST be named typeDiagram ADTs. +- Method ids MUST be stable numeric ids derived from the canonical service + schema, with collision detection at build time. +- Unary, server-streaming, client-streaming, and bidirectional streaming are + selected from the function signature shape. + +## Transport + +- QUIC is the primary transport. +- Frames MUST be self-delimiting TDBIN frames using `[TDBIN-MSG-STREAM]`. +- Capability pointer kind `11` is reserved for remote object references and + promise pipelining. + +## Acceptance + +- A future service generator emits client and server stubs from one `.td` file. +- Interop tests cover unary, streaming, cancellation, backpressure, unknown + method ids, and schema-hash negotiation. diff --git a/packages/cli/src/args.ts b/packages/cli/src/args.ts index 4d8a652..335756e 100644 --- a/packages/cli/src/args.ts +++ b/packages/cli/src/args.ts @@ -4,15 +4,18 @@ import type { Result } from "./result.js"; import { err, ok } from "./result.js"; export type Theme = "light" | "dark"; +export type TdbinCommand = "encode" | "decode" | "verify"; // [CLI-LANG] The supported language set is the framework registry — never hardcoded here, // so the CLI can never advertise a language the framework cannot emit (or omit one it can). export type Lang = converters.Language; export type Emit = "svg" | "td" | "td+svg"; const LANG_LIST = converters.LANGUAGES.join("|"); +const TDBIN_COMMANDS: ReadonlySet = new Set(["encode", "decode", "verify"]); export interface CliArgs { readonly file: string | null; + readonly tdbinCommand: TdbinCommand | null; readonly theme: Theme; readonly fontSize: number | null; readonly from: Lang | null; @@ -32,6 +35,7 @@ const LANGS: ReadonlySet = new Set(converters.LANGUAGES); const EMITS: ReadonlySet = new Set(["svg", "td", "td+svg"]); const isTheme = (v: string): v is Theme => THEMES.has(v as Theme); +const isTdbinCommand = (v: string): v is TdbinCommand => TDBIN_COMMANDS.has(v as TdbinCommand); const isLang = (v: string): v is Lang => LANGS.has(v as Lang); const isEmit = (v: string): v is Emit => EMITS.has(v as Emit); @@ -43,6 +47,7 @@ const parseFontSize = (v: string): Result => { export const parseArgs = (argv: readonly string[]): Result => { const state = { file: null as string | null, + tdbinCommand: null as TdbinCommand | null, theme: "light" as Theme, fontSize: null as number | null, from: null as Lang | null, @@ -68,9 +73,11 @@ export const parseArgs = (argv: readonly string[]): Result => } return state.from !== null && state.to !== null ? err({ message: "--from and --to are mutually exclusive" }) - : state.json && !state.version - ? err({ message: "--json requires --version" }) - : ok(state); + : state.tdbinCommand !== null && (state.from !== null || state.to !== null) + ? err({ message: "tdbin commands cannot be combined with --from or --to" }) + : state.json && !state.version + ? err({ message: "--json requires --version" }) + : ok(state); }; const applyArg = ( @@ -78,6 +85,7 @@ const applyArg = ( next: () => string | null, s: { file: string | null; + tdbinCommand: TdbinCommand | null; theme: Theme; fontSize: number | null; from: Lang | null; @@ -106,9 +114,11 @@ const applyArg = ( ? applyEmit(next(), s) : a.startsWith("-") ? err({ message: `unknown flag: ${a}` }) - : s.file !== null - ? err({ message: `unexpected positional arg: ${a}` }) - : ((s.file = a), ok(true as const)); + : s.tdbinCommand === null && s.file === null && isTdbinCommand(a) + ? ((s.tdbinCommand = a), ok(true as const)) + : s.file !== null + ? err({ message: `unexpected positional arg: ${a}` }) + : ((s.file = a), ok(true as const)); const applyTheme = (v: string | null, s: { theme: Theme }): Result => v === null @@ -149,6 +159,9 @@ export const HELP_TEXT = `typediagram — render typeDiagram DSL to SVG, or conv Usage: typediagram [options] [file] + typediagram encode [file] + typediagram decode [file] + typediagram verify [file] Options: --from LANG Convert from language source to SVG @@ -165,5 +178,6 @@ If file is omitted, reads from stdin. SVG (or language source with --to) is written to stdout. With --emit td, outputs the intermediate typeDiagram source. With --emit td+svg, outputs typeDiagram source then a --- separator then SVG. +TDBIN encode emits a generated Rust ADT+codec module; decode emits codec impls for generated Rust ADTs; verify validates schema support. Errors go to stderr; exit code 1 on failure. `; diff --git a/packages/cli/src/cli.ts b/packages/cli/src/cli.ts index 4ec15ca..ef9837e 100644 --- a/packages/cli/src/cli.ts +++ b/packages/cli/src/cli.ts @@ -8,10 +8,13 @@ import { type AllOpts, type Diagnostic, } from "typediagram-core"; +import { emitRustCodec, generateRustModule } from "typediagram-core/converters/rust-tdbin"; import { HELP_TEXT, parseArgs, type CliArgs } from "./args.js"; import { readSource } from "./io.js"; import { versionJson, versionText } from "./version.js"; +type TdModelResult = { readonly ok: true; readonly value: modelLayer.Model } | { readonly ok: false }; + export const main = async ( argv: readonly string[], stdout: NodeJS.WritableStream, @@ -24,11 +27,13 @@ export const main = async ( ? (stdout.write(HELP_TEXT), 0) : argsResult.value.version ? versionFlow(argsResult.value, stdout, stderr) - : argsResult.value.from !== null - ? fromLangFlow(argsResult.value, stdout, stderr) - : argsResult.value.to !== null - ? toLangFlow(argsResult.value, stdout, stderr) - : renderFlow(argsResult.value, stdout, stderr); + : argsResult.value.tdbinCommand !== null + ? tdbinFlow(argsResult.value, stdout, stderr) + : argsResult.value.from !== null + ? fromLangFlow(argsResult.value, stdout, stderr) + : argsResult.value.to !== null + ? toLangFlow(argsResult.value, stdout, stderr) + : renderFlow(argsResult.value, stdout, stderr); }; /** [SWR-VERSION-CLI-OUTPUT] --version: print from package metadata and exit. No runtime, no network. */ @@ -37,6 +42,48 @@ const versionFlow = (args: CliArgs, stdout: NodeJS.WritableStream, stderr: NodeJ return r.ok ? (stdout.write(`${r.value}\n`), 0) : (stderr.write(`${r.error.message}\n`), 1); }; +/** [TDBIN-CLI] `.td` schema → generated Rust TDBIN glue or schema verification. */ +const tdbinFlow = async ( + args: CliArgs, + stdout: NodeJS.WritableStream, + stderr: NodeJS.WritableStream +): Promise => { + const model = await readTdModel(args.file, stderr); + if (!model.ok) { + return 1; + } + const codegenDiags = modelLayer.validateForCodegen(model.value, "rust"); + if (codegenDiags.length > 0) { + return (writeDiagnostics(codegenDiags, stderr), 1); + } + const command = args.tdbinCommand; + const generated = command === "decode" ? emitRustCodec(model.value) : generateRustModule(model.value); + if (!generated.ok) { + return (writeDiagnostics(generated.error, stderr), 1); + } + return command === "verify" ? (stdout.write("tdbin schema ok\n"), 0) : (stdout.write(generated.value), 0); +}; + +/** Parse and build typeDiagram source from file/stdin. */ +const readTdModel = async (file: string | null, stderr: NodeJS.WritableStream): Promise => { + const srcRes = await readSource(file); + if (!srcRes.ok) { + stderr.write(`${srcRes.error.message}\n`); + return { ok: false }; + } + const parsed = parser.parse(srcRes.value); + if (!parsed.ok) { + writeDiagnostics(parsed.error, stderr); + return { ok: false }; + } + const model = modelLayer.buildModel(parsed.value); + if (!model.ok) { + writeDiagnostics(model.error, stderr); + return { ok: false }; + } + return model; +}; + /** --from: language source → typeDiagram model → td / SVG / both */ const fromLangFlow = async ( args: CliArgs, @@ -48,10 +95,7 @@ const fromLangFlow = async ( return (stderr.write(`${srcRes.error.message}\n`), 1); } - if (args.from === null) { - return (stderr.write("missing --from\n"), 1); - } - const conv = converters.byLanguage[args.from]; + const conv = converters.byLanguage[args.from as NonNullable]; const modelResult = conv.fromSource(srcRes.value); if (!modelResult.ok) { return (writeDiagnostics(modelResult.error, stderr), 1); @@ -99,16 +143,14 @@ const toLangFlow = async ( return (writeDiagnostics(model.error, stderr), 1); } - if (args.to === null) { - return (stderr.write("missing --to\n"), 1); - } // [MODEL-CODEGEN-UNKNOWN] unknown type names must fail generation, not the // downstream build (GH issue #38). - const codegenDiags = modelLayer.validateForCodegen(model.value, args.to); + const to = args.to as NonNullable; + const codegenDiags = modelLayer.validateForCodegen(model.value, to); if (codegenDiags.length > 0) { return (writeDiagnostics(codegenDiags, stderr), 1); } - const conv = converters.byLanguage[args.to]; + const conv = converters.byLanguage[to]; stdout.write(conv.toSource(model.value)); return 0; }; diff --git a/packages/cli/src/io.ts b/packages/cli/src/io.ts index bcde6b0..ac89f06 100644 --- a/packages/cli/src/io.ts +++ b/packages/cli/src/io.ts @@ -21,10 +21,12 @@ const readFileSafe = async (path: string): Promise> => { const readStdin = (): Promise> => { return new Promise((resolve) => { - const chunks: Buffer[] = []; - process.stdin.on("data", (c) => chunks.push(c)); + const chunks: string[] = []; + process.stdin.on("data", (chunk: string | Buffer) => { + chunks.push(typeof chunk === "string" ? chunk : chunk.toString("utf8")); + }); process.stdin.on("end", () => { - resolve(ok(Buffer.concat(chunks).toString("utf8"))); + resolve(ok(chunks.join(""))); }); process.stdin.on("error", (e) => { resolve(err({ message: `stdin error: ${e.message}` })); diff --git a/packages/cli/test/args.test.ts b/packages/cli/test/args.test.ts index e7d9f67..d272a4c 100644 --- a/packages/cli/test/args.test.ts +++ b/packages/cli/test/args.test.ts @@ -11,6 +11,7 @@ describe("[CLI-ARGS] parseArgs", () => { } expect(r.value).toEqual({ file: null, + tdbinCommand: null, theme: "light", fontSize: null, from: null, @@ -27,6 +28,23 @@ describe("[CLI-ARGS] parseArgs", () => { expect(r.ok && r.value.file).toBe("foo.td"); }); + it("parses TDBIN command plus optional file", () => { + const r = parseArgs(["encode", "schema.td"]); + expect(r.ok && r.value.tdbinCommand).toBe("encode"); + expect(r.ok && r.value.file).toBe("schema.td"); + }); + + it("parses TDBIN verify command without a file", () => { + const r = parseArgs(["verify"]); + expect(r.ok && r.value.tdbinCommand).toBe("verify"); + expect(r.ok && r.value.file).toBeNull(); + }); + + it("rejects TDBIN commands combined with --to", () => { + const r = parseArgs(["decode", "--to", "rust"]); + expect(r.ok).toBe(false); + }); + it("parses --theme dark", () => { const r = parseArgs(["--theme", "dark", "foo.td"]); expect(r.ok && r.value.theme).toBe("dark"); diff --git a/packages/cli/test/cli.e2e.test.ts b/packages/cli/test/cli.e2e.test.ts index 94366c2..02130da 100644 --- a/packages/cli/test/cli.e2e.test.ts +++ b/packages/cli/test/cli.e2e.test.ts @@ -197,6 +197,72 @@ describe("[CLI-E2E-TO] --to language export", () => { }); }); +describe("[CLI-TDBIN] generated Rust TDBIN glue", () => { + it("encode emits generated Rust ADTs plus TDBIN codec impls", async () => { + const out = makeStream(); + const err = makeStream(); + const code = await main(["encode", fixturePath("scalars.td")], out.stream, err.stream); + expect(err.text()).toBe(""); + expect(code).toBe(0); + expect(out.text()).toContain("pub struct AuditEvent"); + expect(out.text()).toContain("impl tdbin::Struct for AuditEvent"); + expect(out.text()).toContain("w.word_list(at, Self::DATA_WORDS, 0, Some(&history_words))?;"); + }); + + it("decode emits codec impls for already-generated Rust ADTs", async () => { + const out = makeStream(); + const err = makeStream(); + const code = await main(["decode", fixturePath("scalars.td")], out.stream, err.stream); + expect(err.text()).toBe(""); + expect(code).toBe(0); + expect(out.text()).not.toContain("pub struct AuditEvent"); + expect(out.text()).toContain("impl tdbin::Struct for AuditEvent"); + expect(out.text()).toContain("fn read_struct"); + }); + + it("verify validates TDBIN schema support without emitting Rust source", async () => { + const out = makeStream(); + const err = makeStream(); + const code = await main(["verify", fixturePath("scalars.td")], out.stream, err.stream); + expect(err.text()).toBe(""); + expect(code).toBe(0); + expect(out.text()).toBe("tdbin schema ok\n"); + }); + + it("verify reports unsupported TDBIN schemas as diagnostics", async () => { + const out = makeStream(); + const err = makeStream(); + const code = await main(["verify", fixturePath("small.td")], out.stream, err.stream); + expect(code).toBe(1); + expect(out.text()).toBe(""); + expect(err.text()).toContain("tdbin:"); + }); + + it("verify reports missing files, parse errors, and model errors", async () => { + for (const argv of [ + ["verify", "/no/such/tdbin-schema.td"], + ["verify", fixturePath("bad.td")], + ["verify", fixturePath("duplicate.td")], + ]) { + const out = makeStream(); + const err = makeStream(); + const code = await main(argv, out.stream, err.stream); + expect(code).toBe(1); + expect(out.text()).toBe(""); + expect(err.text().length).toBeGreaterThan(0); + } + }); + + it("verify reports Rust codegen validation errors before TDBIN generation", async () => { + const out = makeStream(); + const err = makeStream(); + const code = await main(["verify", fixturePath("unknown-types.td")], out.stream, err.stream); + expect(code).toBe(1); + expect(out.text()).toBe(""); + expect(err.text()).toMatch(/unknown type/i); + }); +}); + // Ensure fixture file exists (sanity). describe("[CLI-E2E-FIXTURE] fixtures present", () => { it("small.td contains expected content", async () => { diff --git a/packages/cli/test/io.test.ts b/packages/cli/test/io.test.ts new file mode 100644 index 0000000..d7a7c30 --- /dev/null +++ b/packages/cli/test/io.test.ts @@ -0,0 +1,23 @@ +// [CLI-IO] Stdin read paths are Result-returning and never throw. +import { describe, expect, it, vi } from "vitest"; +import { readSource } from "../src/io.js"; + +describe("[CLI-IO] readSource", () => { + it("returns stdin stream errors as Result errors", async () => { + const on = vi.spyOn(process.stdin, "on").mockImplementation((eventName, listener) => { + if (eventName === "error") { + listener(new Error("broken pipe")); + } + return process.stdin; + }); + + const result = await readSource(null); + + expect(result.ok).toBe(false); + expect(!result.ok && result.error.message).toBe("stdin error: broken pipe"); + expect(on).toHaveBeenCalledWith("data", expect.any(Function)); + expect(on).toHaveBeenCalledWith("end", expect.any(Function)); + expect(on).toHaveBeenCalledWith("error", expect.any(Function)); + on.mockRestore(); + }); +}); diff --git a/packages/cli/tsconfig.build.json b/packages/cli/tsconfig.build.json index 3a1d646..d604518 100644 --- a/packages/cli/tsconfig.build.json +++ b/packages/cli/tsconfig.build.json @@ -4,6 +4,7 @@ "module": "ESNext", "moduleResolution": "bundler", "lib": ["ES2022"], + "types": ["node"], "strict": true, "noUncheckedIndexedAccess": true, "exactOptionalPropertyTypes": true, diff --git a/packages/typediagram/package.json b/packages/typediagram/package.json index 0bc13d9..7e5f219 100644 --- a/packages/typediagram/package.json +++ b/packages/typediagram/package.json @@ -35,6 +35,10 @@ "./render-svg": { "types": "./dist/render-svg/index.d.ts", "import": "./dist/render-svg/index.js" + }, + "./converters/rust-tdbin": { + "types": "./dist/converters/rust-tdbin.d.ts", + "import": "./dist/converters/rust-tdbin.js" } }, "files": [ diff --git a/packages/typediagram/src/converters/csharp.ts b/packages/typediagram/src/converters/csharp.ts index a7feec2..3a71da1 100644 --- a/packages/typediagram/src/converters/csharp.ts +++ b/packages/typediagram/src/converters/csharp.ts @@ -11,7 +11,7 @@ import { type Result, err } from "../result.js"; import { type Model, type ResolvedTypeRef, visibleDeclsForTarget } from "../model/types.js"; import { ModelBuilder, record, union, alias } from "../model/builder.js"; import type { Converter } from "./types.js"; -import { mapBuiltinName, parseTypeRef } from "./parse-typeref.js"; +import { isOption, mapBuiltinName, parseTypeRef } from "./parse-typeref.js"; import { extractBalancedBlock, extractTrailingNullable, @@ -260,8 +260,6 @@ const fromCSharp = (source: string): Result => { // ── To C# ── -const isOption = (t: ResolvedTypeRef): boolean => t.name === "Option"; - const mapTdToCs = (t: ResolvedTypeRef): string => { if (isOption(t) && t.args.length === 1) { const inner = t.args[0]; diff --git a/packages/typediagram/src/converters/dart.ts b/packages/typediagram/src/converters/dart.ts index 514bd8e..806ccac 100644 --- a/packages/typediagram/src/converters/dart.ts +++ b/packages/typediagram/src/converters/dart.ts @@ -11,7 +11,7 @@ import { type Result, err } from "../result.js"; import { type Model, type ResolvedTypeRef, visibleDeclsForTarget } from "../model/types.js"; import { ModelBuilder, record, union, alias } from "../model/builder.js"; import type { Converter } from "./types.js"; -import { mapBuiltinName, parseTypeRef } from "./parse-typeref.js"; +import { isOption, mapBuiltinName, parseTypeRef } from "./parse-typeref.js"; import { extractBalancedBlock, extractTrailingNullable, @@ -284,8 +284,6 @@ const fromDart = (source: string): Result => { // ── To Dart ── -const isOption = (t: ResolvedTypeRef): boolean => t.name === "Option"; - const mapTdToDart = (t: ResolvedTypeRef): string => { if (isOption(t) && t.args.length === 1) { const inner = t.args[0]; diff --git a/packages/typediagram/src/converters/parse-typeref.ts b/packages/typediagram/src/converters/parse-typeref.ts index 2926a77..d3380a8 100644 --- a/packages/typediagram/src/converters/parse-typeref.ts +++ b/packages/typediagram/src/converters/parse-typeref.ts @@ -38,3 +38,12 @@ export const printTypeRef = (t: ResolvedTypeRef): string => */ export const mapBuiltinName = (t: ResolvedTypeRef, table: Record): string => t.resolution.kind === "declared" ? t.name : (table[t.name] ?? t.name); + +/** True when `t` is the builtin `Option<...>`. */ +export const isOption = (t: ResolvedTypeRef): boolean => t.name === "Option"; + +/** True when `t` is the builtin `List<...>`. */ +export const isList = (t: ResolvedTypeRef): boolean => t.name === "List"; + +/** True when `t` is the builtin `Map<...>`. */ +export const isMap = (t: ResolvedTypeRef): boolean => t.name === "Map"; diff --git a/packages/typediagram/src/converters/protobuf.ts b/packages/typediagram/src/converters/protobuf.ts index e354bab..d263da8 100644 --- a/packages/typediagram/src/converters/protobuf.ts +++ b/packages/typediagram/src/converters/protobuf.ts @@ -20,7 +20,7 @@ import { type Result, err } from "../result.js"; import { modelReferencesType, type Model, type ResolvedTypeRef, visibleDeclsForTarget } from "../model/types.js"; import { ModelBuilder, record, union, alias } from "../model/builder.js"; import type { Converter } from "./types.js"; -import { mapBuiltinName, parseTypeRef, printTypeRef } from "./parse-typeref.js"; +import { isList, isMap, isOption, mapBuiltinName, parseTypeRef, printTypeRef } from "./parse-typeref.js"; import { extractBalancedBlock } from "./brace-lang.js"; // ── Type mapping ── @@ -338,10 +338,6 @@ const collectOneofFieldNames = (body: string): string[] => { // ── To proto ── -const isOption = (t: ResolvedTypeRef): boolean => t.name === "Option"; -const isList = (t: ResolvedTypeRef): boolean => t.name === "List"; -const isMap = (t: ResolvedTypeRef): boolean => t.name === "Map"; - /** * Returns a proto3 expression for the given TD type, or null if the type * can't be expressed natively and needs a `@td-type` directive instead. diff --git a/packages/typediagram/src/converters/python.ts b/packages/typediagram/src/converters/python.ts index fd9de8a..97403a4 100644 --- a/packages/typediagram/src/converters/python.ts +++ b/packages/typediagram/src/converters/python.ts @@ -19,7 +19,7 @@ import { } from "../model/types.js"; import { ModelBuilder, record, union, alias } from "../model/builder.js"; import type { Converter, PythonOpts } from "./types.js"; -import { mapBuiltinName, parseTypeRef, splitGenericArgs } from "./parse-typeref.js"; +import { isList, isMap, isOption, mapBuiltinName, parseTypeRef, splitGenericArgs } from "./parse-typeref.js"; // ── Type mapping ── @@ -321,10 +321,6 @@ const fromPython = (source: string): Result => { // ── To Python ── -const isOption = (t: ResolvedTypeRef): boolean => t.name === "Option"; -const isList = (t: ResolvedTypeRef): boolean => t.name === "List"; -const isMap = (t: ResolvedTypeRef): boolean => t.name === "Map"; - const mapTdToPyDataclass = (t: ResolvedTypeRef): string => { const name = mapBuiltinName(t, TD_TO_PY); return t.args.length === 0 ? name : `${name}[${t.args.map(mapTdToPyDataclass).join(", ")}]`; diff --git a/packages/typediagram/src/converters/rust-tdbin.ts b/packages/typediagram/src/converters/rust-tdbin.ts index 975c1ee..99a5bae 100644 --- a/packages/typediagram/src/converters/rust-tdbin.ts +++ b/packages/typediagram/src/converters/rust-tdbin.ts @@ -9,7 +9,6 @@ import { isTupleVariantFields, type Model, type ResolvedDecl, - type ResolvedField, type ResolvedRecord, type ResolvedTypeRef, type ResolvedUnion, @@ -30,10 +29,30 @@ const SCALARS: Record = { /** How a record field is laid out on the wire. */ type FieldPlan = | { kind: "scalar"; slot: number; bits: string; from: string } + | { kind: "boolBit"; slot: number; bit: number } + | { kind: "dateTime"; slot: number } + | { kind: "bytes16"; slot: number; semantic: Bytes16Semantic } | { kind: "optScalar"; presenceSlot: number; valueSlot: number; bits: string; from: string } + | { kind: "optDateTime"; presenceSlot: number; valueSlot: number } + | { kind: "optBytes16"; presenceSlot: number; valueSlot: number; semantic: Bytes16Semantic } | { kind: "string"; slot: number; optional: boolean } | { kind: "bytes"; slot: number; optional: boolean } - | { kind: "child"; slot: number; optional: boolean; rustType: string }; + | { kind: "child"; slot: number; optional: boolean; rustType: string } + | { kind: "list"; slot: number; optional: boolean; list: ListPlan }; + +type ListPlan = + | { kind: "bool" } + | { kind: "word"; bits: string; from: string } + | { kind: "dateTime" } + | { kind: "bytes16"; semantic: Bytes16Semantic } + | { kind: "string" } + | { kind: "bytes" } + | { kind: "child"; rustType: string } + | { kind: "enum"; rustType: string; variants: string[] }; + +type FieldError = { error: string }; +type SemanticScalar = "DateTime" | "Uuid" | "Decimal"; +type Bytes16Semantic = "Uuid" | "Decimal"; /** A fully-classified record: section sizes plus per-field placement. */ interface RecordPlan { @@ -51,71 +70,281 @@ interface UnionPlan { variants: Array<{ name: string; ordinal: number; payload: VariantPlan }>; } +interface LayoutCursor { + dataSlot: number; + ptrSlot: number; + boolSlot: number | null; + nextBoolBit: number; +} + +const BOOL_BITS_PER_WORD = 64; + const diag = (message: string): Diagnostic[] => [{ severity: "error", message, line: 0, col: 0, length: 0 }]; +const rsNumber = (value: number): string => String(value); + const isPrim = (t: ResolvedTypeRef, name: string): boolean => t.name === name && t.resolution.kind === "primitive" && t.args.length === 0; const isDeclared = (t: ResolvedTypeRef): boolean => t.resolution.kind === "declared"; +const declaredRecord = (decls: readonly ResolvedDecl[], t: ResolvedTypeRef): ResolvedRecord | undefined => { + if (t.resolution.kind !== "declared") { + return undefined; + } + const { declName } = t.resolution; + return decls.find((d): d is ResolvedRecord => d.kind === "record" && d.name === declName); +}; + +const declaredUnion = (decls: readonly ResolvedDecl[], t: ResolvedTypeRef): ResolvedUnion | undefined => { + if (t.resolution.kind !== "declared") { + return undefined; + } + const { declName } = t.resolution; + return decls.find((d): d is ResolvedUnion => d.kind === "union" && d.name === declName); +}; + +const isFieldError = (placed: unknown): placed is FieldError => + typeof placed === "object" && placed !== null && "error" in placed; + +const emptyRecordError = (t: ResolvedTypeRef): FieldError => ({ + error: `tdbin: empty-record pointer '${printTypeRef(t)}' has no non-null v0 marker`, +}); + +const listInnerOf = (t: ResolvedTypeRef): ResolvedTypeRef | undefined => + t.name === "List" && t.args.length === 1 ? t.args[0] : undefined; + /** Classify a pointer-typed inner (String/Bytes/declared) for `Option`. */ -const pointerInner = (t: ResolvedTypeRef, slot: number, optional: boolean): FieldPlan | null => +const pointerInner = ( + decls: readonly ResolvedDecl[], + t: ResolvedTypeRef, + slot: number, + optional: boolean +): FieldPlan | FieldError | null => isPrim(t, "String") ? { kind: "string", slot, optional } : isPrim(t, "Bytes") ? { kind: "bytes", slot, optional } : isDeclared(t) - ? { kind: "child", slot, optional, rustType: mapTdToRs(t) } + ? (declaredRecord(decls, t)?.fields.length ?? 1) === 0 + ? emptyRecordError(t) + : { kind: "child", slot, optional, rustType: mapTdToRs(t) } : null; -/** A classified field plan plus the advanced data/pointer cursors. */ -type Placed = { plan: FieldPlan; dataSlot: number; ptrSlot: number } | null; - /** The one-word scalar codec for a bare primitive (Bool/Int/Float), else undefined. */ const scalarOf = (t: ResolvedTypeRef): { bits: string; from: string } | undefined => t.args.length === 0 && t.resolution.kind === "primitive" ? SCALARS[t.name] : undefined; +const isSemanticName = (name: string): name is SemanticScalar => + name === "DateTime" || name === "Uuid" || name === "Decimal"; + +/** The semantic scalar codec for a bare primitive, else undefined. */ +const semanticOf = (t: ResolvedTypeRef): SemanticScalar | undefined => + t.args.length === 0 && t.resolution.kind === "primitive" && isSemanticName(t.name) ? t.name : undefined; + +/** Allocate a direct Bool into a reusable bitset word ([TDBIN-WIRE-WORD]). */ +const allocateBool = (cursor: LayoutCursor): FieldPlan => { + let slot = cursor.boolSlot; + if (slot === null || cursor.nextBoolBit >= BOOL_BITS_PER_WORD) { + slot = cursor.dataSlot; + cursor.boolSlot = slot; + cursor.dataSlot = cursor.dataSlot + 1; + cursor.nextBoolBit = 0; + } + const bit = cursor.nextBoolBit; + cursor.nextBoolBit = bit + 1; + return { kind: "boolBit", slot, bit }; +}; + +const allocateSemantic = (semantic: SemanticScalar, cursor: LayoutCursor): FieldPlan => { + const slot = cursor.dataSlot; + cursor.dataSlot = cursor.dataSlot + (semantic === "DateTime" ? 1 : 2); + return semantic === "DateTime" ? { kind: "dateTime", slot } : { kind: "bytes16", slot, semantic }; +}; + +const allocateOptSemantic = (semantic: SemanticScalar, cursor: LayoutCursor): FieldPlan => { + const presenceSlot = cursor.dataSlot; + const valueSlot = presenceSlot + 1; + cursor.dataSlot = cursor.dataSlot + (semantic === "DateTime" ? 2 : 3); + return semantic === "DateTime" + ? { kind: "optDateTime", presenceSlot, valueSlot } + : { kind: "optBytes16", presenceSlot, valueSlot, semantic }; +}; + /** Classify an `Option` field: a scalar inner takes a presence slot + a value * slot ([TDBIN-PRIM-OPTION], word-granular in v0 until bit-packing collapses the * flag to 1 bit); a pointer inner takes one pointer slot with null = `None`. */ -const classifyOption = (inner: ResolvedTypeRef, dataSlot: number, ptrSlot: number): Placed => { +const optionEmptyRecordError = (outer: ResolvedTypeRef): FieldError => ({ + error: `tdbin: Option '${printTypeRef(outer)}' would alias the null pointer in v0`, +}); + +const BYTE_LIST_VARIANT_LIMIT = 256; + +const enumListPlan = (u: ResolvedUnion, t: ResolvedTypeRef): ListPlan | FieldError | null => { + if (!u.variants.every((v) => v.fields.length === 0)) { + return null; + } + if (u.variants.length > BYTE_LIST_VARIANT_LIMIT) { + return { error: `tdbin: List '${printTypeRef(t)}' has ordinals >= 256` }; + } + return { kind: "enum", rustType: mapTdToRs(t), variants: u.variants.map((v) => v.name) }; +}; + +const childListPlan = (decls: readonly ResolvedDecl[], t: ResolvedTypeRef): ListPlan | FieldError | null => { + const rec = declaredRecord(decls, t); + if (rec?.fields.length === 0) { + return emptyRecordError(t); + } + if (rec !== undefined || declaredUnion(decls, t) !== undefined) { + return { kind: "child", rustType: mapTdToRs(t) }; + } + return null; +}; + +const listPlanFor = (decls: readonly ResolvedDecl[], inner: ResolvedTypeRef): ListPlan | FieldError | null => { + const scalar = scalarOf(inner); + const semantic = semanticOf(inner); + const union = declaredUnion(decls, inner); + const enumPlan = union === undefined ? null : enumListPlan(union, inner); + if (isPrim(inner, "Bool")) { + return { kind: "bool" }; + } + if (scalar !== undefined) { + return { kind: "word", bits: scalar.bits, from: scalar.from }; + } + if (semantic === "DateTime") { + return { kind: "dateTime" }; + } + if (semantic === "Uuid" || semantic === "Decimal") { + return { kind: "bytes16", semantic }; + } + if (isPrim(inner, "String")) { + return { kind: "string" }; + } + if (isPrim(inner, "Bytes")) { + return { kind: "bytes" }; + } + if (isFieldError(enumPlan) || enumPlan !== null) { + return enumPlan; + } + return childListPlan(decls, inner); +}; + +const classifyList = ( + decls: readonly ResolvedDecl[], + outer: ResolvedTypeRef, + inner: ResolvedTypeRef, + slot: number, + optional: boolean +): FieldPlan | FieldError | null => { + const plan = listPlanFor(decls, inner); + return plan === null || isFieldError(plan) ? plan : { kind: "list", slot, optional, list: plan }; +}; + +const classifyOption = ( + decls: readonly ResolvedDecl[], + outer: ResolvedTypeRef, + inner: ResolvedTypeRef, + cursor: LayoutCursor +): FieldPlan | FieldError | null => { + const listInner = listInnerOf(inner); + if (listInner !== undefined) { + const plan = classifyList(decls, inner, listInner, cursor.ptrSlot, true); + if (isFieldError(plan)) { + return plan; + } + if (plan !== null) { + cursor.ptrSlot = cursor.ptrSlot + 1; + } + return plan; + } + const innerSemantic = semanticOf(inner); + if (innerSemantic !== undefined) { + return allocateOptSemantic(innerSemantic, cursor); + } const innerScalar = scalarOf(inner); if (innerScalar !== undefined) { - const plan: FieldPlan = { kind: "optScalar", presenceSlot: dataSlot, valueSlot: dataSlot + 1, bits: innerScalar.bits, from: innerScalar.from }; - return { plan, dataSlot: dataSlot + 2, ptrSlot }; + const plan: FieldPlan = { + kind: "optScalar", + presenceSlot: cursor.dataSlot, + valueSlot: cursor.dataSlot + 1, + bits: innerScalar.bits, + from: innerScalar.from, + }; + cursor.dataSlot = cursor.dataSlot + 2; + return plan; + } + if ((declaredRecord(decls, inner)?.fields.length ?? 1) === 0) { + return optionEmptyRecordError(outer); } - const plan = pointerInner(inner, ptrSlot, true); - return plan === null ? null : { plan, dataSlot, ptrSlot: ptrSlot + 1 }; + const plan = pointerInner(decls, inner, cursor.ptrSlot, true); + if (isFieldError(plan)) { + return plan; + } + if (plan !== null) { + cursor.ptrSlot = cursor.ptrSlot + 1; + } + return plan; }; /** Classify one record field into a scalar, `Option`, or pointer plan. */ -const classifyField = (t: ResolvedTypeRef, dataSlot: number, ptrSlot: number): Placed => { +const classifyField = ( + decls: readonly ResolvedDecl[], + t: ResolvedTypeRef, + cursor: LayoutCursor +): FieldPlan | FieldError | null => { + if (isPrim(t, "Bool")) { + return allocateBool(cursor); + } + const semantic = semanticOf(t); + if (semantic !== undefined) { + return allocateSemantic(semantic, cursor); + } const scalar = scalarOf(t); if (scalar !== undefined) { - return { plan: { kind: "scalar", slot: dataSlot, bits: scalar.bits, from: scalar.from }, dataSlot: dataSlot + 1, ptrSlot }; + const slot = cursor.dataSlot; + cursor.dataSlot = cursor.dataSlot + 1; + return { kind: "scalar", slot, bits: scalar.bits, from: scalar.from }; } const optionInner = t.name === "Option" && t.args.length === 1 ? t.args[0] : undefined; if (optionInner !== undefined) { - return classifyOption(optionInner, dataSlot, ptrSlot); + return classifyOption(decls, t, optionInner, cursor); + } + const listInner = listInnerOf(t); + if (listInner !== undefined) { + const list = classifyList(decls, t, listInner, cursor.ptrSlot, false); + if (isFieldError(list)) { + return list; + } + if (list !== null) { + cursor.ptrSlot = cursor.ptrSlot + 1; + } + return list; } - const plan = pointerInner(t, ptrSlot, false); - return plan === null ? null : { plan, dataSlot, ptrSlot: ptrSlot + 1 }; + const plan = pointerInner(decls, t, cursor.ptrSlot, false); + if (isFieldError(plan)) { + return plan; + } + if (plan !== null) { + cursor.ptrSlot = cursor.ptrSlot + 1; + } + return plan; }; -const classifyRecord = (rec: ResolvedRecord): Result => { - let dataSlot = 0; - let ptrSlot = 0; +const classifyRecord = (decls: readonly ResolvedDecl[], rec: ResolvedRecord): Result => { + const cursor: LayoutCursor = { dataSlot: 0, ptrSlot: 0, boolSlot: null, nextBoolBit: 0 }; const fields: Array<{ name: string; plan: FieldPlan }> = []; for (const f of rec.fields) { - const c = classifyField(f.type, dataSlot, ptrSlot); + const c = classifyField(decls, f.type, cursor); if (c === null) { return err(diag(`tdbin: unsupported field type '${printTypeRef(f.type)}' in ${rec.name}.${f.name}`)); } - fields.push({ name: f.name, plan: c.plan }); - dataSlot = c.dataSlot; - ptrSlot = c.ptrSlot; + if (isFieldError(c)) { + return err(diag(`${c.error} in ${rec.name}.${f.name}`)); + } + fields.push({ name: f.name, plan: c }); } - return ok({ dataWords: dataSlot, ptrWords: ptrSlot, fields }); + return ok({ dataWords: cursor.dataSlot, ptrWords: cursor.ptrSlot, fields }); }; const classifyVariant = (v: ResolvedVariant): Result => { @@ -148,22 +377,155 @@ const classifyUnion = (u: ResolvedUnion): Result => { // ── Emission ── +const bytes16Source = (semantic: Bytes16Semantic, value: string): string => + semantic === "Uuid" ? `${value}.as_bytes()` : `&${value}.serialize()`; + +const bytes16Value = (semantic: Bytes16Semantic, words: string): string => + semantic === "Uuid" ? `uuid::Uuid::from_bytes(${words})` : `rust_decimal::Decimal::deserialize(${words})`; + +const dateTimeResult = (word: string): string => + `chrono::DateTime::::from_timestamp_micros(tdbin::scalar::i64_from(${word})).ok_or(tdbin::DecodeError::LimitExceeded)`; + +const dateTimeValue = (word: string): string => `${dateTimeResult(word)}?`; + +const listSource = (self: string, optional: boolean): string => (optional ? `${self}.as_deref()` : `Some(&${self})`); + +const collectWordList = (source: string, map: string): string => `${source}.iter().map(${map}).collect::>()`; + +const writeWordList = ( + name: string, + self: string, + p: Extract, + slot: number, + optional: boolean +): string => { + const words = `${name}_words`; + const map = `|value| tdbin::scalar::${p.bits}(*value)`; + const init = optional + ? ` let ${words} = ${self}.as_ref().map(|values| ${collectWordList("values", map)});` + : ` let ${words} = ${collectWordList(self, map)};`; + return [ + init, + ` w.word_list(at, Self::DATA_WORDS, ${rsNumber(slot)}, ${optional ? `${words}.as_deref()` : `Some(&${words})`})?;`, + ].join("\n"); +}; + +const writeDateTimeList = (name: string, self: string, slot: number, optional: boolean): string => { + const words = `${name}_words`; + const map = "|value| tdbin::scalar::i64_bits(value.timestamp_micros())"; + const init = optional + ? ` let ${words} = ${self}.as_ref().map(|values| ${collectWordList("values", map)});` + : ` let ${words} = ${collectWordList(self, map)};`; + return [ + init, + ` w.word_list(at, Self::DATA_WORDS, ${rsNumber(slot)}, ${optional ? `${words}.as_deref()` : `Some(&${words})`})?;`, + ].join("\n"); +}; + +const writeBytes16List = ( + name: string, + self: string, + p: Extract, + slot: number, + optional: boolean +): string => { + const words = `${name}_words`; + const map = `|value| tdbin::scalar::bytes16_words(${bytes16Source(p.semantic, "value")})`; + const init = optional + ? ` let ${words} = ${self}.as_ref().map(|values| ${collectWordList("values", map)});` + : ` let ${words} = ${collectWordList(self, map)};`; + return [ + init, + ` w.bytes16_list(at, Self::DATA_WORDS, ${rsNumber(slot)}, ${optional ? `${words}.as_deref()` : `Some(&${words})`})?;`, + ].join("\n"); +}; + +const enumOrdinalArm = (rustType: string, name: string, ordinal: number): string => + ` &${rustType}::${name} => ${rsNumber(ordinal)}u8,`; + +const writeEnumList = ( + name: string, + self: string, + p: Extract, + slot: number, + optional: boolean +): string => { + const ordinals = `${name}_ordinals`; + const arms = p.variants.map((variant, ordinal) => enumOrdinalArm(p.rustType, variant, ordinal)).join("\n"); + const collect = (source: string): string => + `${source}.iter().map(|value| match value {\n${arms}\n }).collect::>()`; + const init = optional + ? ` let ${ordinals} = ${self}.as_ref().map(|values| ${collect("values")});` + : ` let ${ordinals} = ${collect(self)};`; + return [ + init, + ` w.byte_list(at, Self::DATA_WORDS, ${rsNumber(slot)}, ${optional ? `${ordinals}.as_deref()` : `Some(&${ordinals})`})?;`, + ].join("\n"); +}; + +const writeList = (name: string, p: Extract): string => { + const self = `self.${name}`; + switch (p.list.kind) { + case "bool": + return ` w.bool_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${listSource(self, p.optional)})?;`; + case "word": + return writeWordList(name, self, p.list, p.slot, p.optional); + case "dateTime": + return writeDateTimeList(name, self, p.slot, p.optional); + case "bytes16": + return writeBytes16List(name, self, p.list, p.slot, p.optional); + case "string": + return ` w.string_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${listSource(self, p.optional)})?;`; + case "bytes": + return ` w.bytes_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${listSource(self, p.optional)})?;`; + case "child": + return ` w.child_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${listSource(self, p.optional)})?;`; + case "enum": + return writeEnumList(name, self, p.list, p.slot, p.optional); + } +}; + const writeField = (name: string, p: FieldPlan): string => { const self = `self.${name}`; switch (p.kind) { case "scalar": - return ` w.scalar(at, ${p.slot}, tdbin::scalar::${p.bits}(${self}))?;`; + return ` w.scalar(at, ${rsNumber(p.slot)}, tdbin::scalar::${p.bits}(${self}))?;`; + case "boolBit": + return ` w.bool_bit(at, ${rsNumber(p.slot)}, ${rsNumber(p.bit)}, ${self})?;`; + case "dateTime": + return ` w.scalar(at, ${rsNumber(p.slot)}, tdbin::scalar::i64_bits(${self}.timestamp_micros()))?;`; + case "bytes16": + return [ + ` let ${name}_words = tdbin::scalar::bytes16_words(${bytes16Source(p.semantic, self)});`, + ` w.scalar(at, ${rsNumber(p.slot)}, ${name}_words.0)?;`, + ` w.scalar(at, ${rsNumber(p.slot + 1)}, ${name}_words.1)?;`, + ].join("\n"); case "optScalar": return [ - ` w.scalar(at, ${p.presenceSlot}, u64::from(${self}.is_some()))?;`, - ` w.scalar(at, ${p.valueSlot}, ${self}.map_or(0, tdbin::scalar::${p.bits}))?;`, + ` w.scalar(at, ${rsNumber(p.presenceSlot)}, u64::from(${self}.is_some()))?;`, + ` w.scalar(at, ${rsNumber(p.valueSlot)}, ${self}.map_or(0, tdbin::scalar::${p.bits}))?;`, + ].join("\n"); + case "optDateTime": + return [ + ` w.scalar(at, ${rsNumber(p.presenceSlot)}, u64::from(${self}.is_some()))?;`, + ` w.scalar(at, ${rsNumber(p.valueSlot)}, ${self}.as_ref().map_or(0, |value| tdbin::scalar::i64_bits(value.timestamp_micros())))?;`, + ].join("\n"); + case "optBytes16": + return [ + ` let ${name}_words = ${self}.as_ref().map(|value| tdbin::scalar::bytes16_words(${bytes16Source(p.semantic, "value")}));`, + ` w.scalar(at, ${rsNumber(p.presenceSlot)}, u64::from(${name}_words.is_some()))?;`, + ` let (${name}_lo, ${name}_hi) = ${name}_words.unwrap_or((0, 0));`, + ` w.scalar(at, ${rsNumber(p.valueSlot)}, ${name}_lo)?;`, + ` w.scalar(at, ${rsNumber(p.valueSlot + 1)}, ${name}_hi)?;`, ].join("\n"); case "string": - return ` w.string(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; + return ` w.string(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; case "bytes": - return ` w.bytes(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; + return ` w.bytes(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${p.optional ? `${self}.as_deref()` : `Some(&${self})`})?;`; case "child": - return ` w.child(at, Self::DATA_WORDS, ${p.slot}, ${p.optional ? `${self}.as_ref()` : `Some(&${self})`})?;`; + return ` w.child(at, Self::DATA_WORDS, ${rsNumber(p.slot)}, ${p.optional ? `${self}.as_ref()` : `Some(&${self})`})?;`; + case "list": + return writeList(name, p); } }; @@ -171,30 +533,146 @@ const writeField = (name: string, p: FieldPlan): string => { * is optional, else unwrap it or fail with `UnexpectedNull`. */ const optTail = (optional: boolean): string => (optional ? "?" : "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"); +const listTail = (optional: boolean): string => (optional ? "?" : "?.unwrap_or_default()"); + +const readWordList = ( + name: string, + p: Extract, + slot: number, + optional: boolean +): string => { + const call = `r.word_list(at, Self::DATA_WORDS, ${rsNumber(slot)})?`; + const map = `values.into_iter().map(tdbin::scalar::${p.from}).collect::>()`; + return optional + ? ` let ${name} = ${call}.map(|values| ${map});` + : ` let ${name} = ${call}.unwrap_or_default().into_iter().map(tdbin::scalar::${p.from}).collect::>();`; +}; + +const readDateTimeList = (name: string, slot: number, optional: boolean): string => { + const call = `r.word_list(at, Self::DATA_WORDS, ${rsNumber(slot)})?`; + const collect = (source: string): string => + `${source}.into_iter().map(|word| ${dateTimeResult("word")}).collect::, _>>()?`; + return optional + ? [ + ` let ${name} = match ${call} {`, + ` Some(values) => Some(${collect("values")}),`, + ` None => None,`, + ` };`, + ].join("\n") + : ` let ${name} = ${collect(`${call}.unwrap_or_default()`)};`; +}; + +const bytes16ListMap = (semantic: Bytes16Semantic): string => + `values.into_iter().map(|(lo, hi)| ${bytes16Value(semantic, "tdbin::scalar::bytes16_from_words(lo, hi)")}).collect::>()`; + +const readBytes16List = ( + name: string, + p: Extract, + slot: number, + optional: boolean +): string => { + const call = `r.bytes16_list(at, Self::DATA_WORDS, ${rsNumber(slot)})?`; + const map = bytes16ListMap(p.semantic); + return optional + ? ` let ${name} = ${call}.map(|values| ${map});` + : ` let ${name} = ${call}.unwrap_or_default().into_iter().map(|(lo, hi)| ${bytes16Value( + p.semantic, + "tdbin::scalar::bytes16_from_words(lo, hi)" + )}).collect::>();`; +}; + +const enumDecodeArm = (rustType: string, name: string, ordinal: number): string => + ` ${rsNumber(ordinal)} => Ok(${rustType}::${name}),`; + +const enumDecoder = (p: Extract, source: string): string => { + const arms = p.variants.map((variant, ordinal) => enumDecodeArm(p.rustType, variant, ordinal)).join("\n"); + return `${source}.into_iter().map(|ordinal| match ordinal {\n${arms}\n ordinal => Err(tdbin::DecodeError::UnknownVariant { ordinal: u64::from(ordinal) }),\n }).collect::, _>>()?`; +}; + +const readEnumList = ( + name: string, + p: Extract, + slot: number, + optional: boolean +): string => { + const call = `r.byte_list(at, Self::DATA_WORDS, ${rsNumber(slot)})?`; + return optional + ? [ + ` let ${name} = match ${call} {`, + ` Some(values) => Some(${enumDecoder(p, "values")}),`, + ` None => None,`, + ` };`, + ].join("\n") + : ` let ${name} = ${enumDecoder(p, `${call}.unwrap_or_default()`)};`; +}; + +const readList = (name: string, p: Extract): string => { + switch (p.list.kind) { + case "bool": + return ` let ${name} = r.bool_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${listTail(p.optional)};`; + case "word": + return readWordList(name, p.list, p.slot, p.optional); + case "dateTime": + return readDateTimeList(name, p.slot, p.optional); + case "bytes16": + return readBytes16List(name, p.list, p.slot, p.optional); + case "string": + return ` let ${name} = r.string_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${listTail(p.optional)};`; + case "bytes": + return ` let ${name} = r.bytes_list(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${listTail(p.optional)};`; + case "child": + return ` let ${name} = r.child_list::<${p.list.rustType}>(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${listTail(p.optional)};`; + case "enum": + return readEnumList(name, p.list, p.slot, p.optional); + } +}; + const readField = (name: string, p: FieldPlan): string => { switch (p.kind) { case "scalar": - return ` let ${name} = tdbin::scalar::${p.from}(r.scalar(at, ${p.slot})?);`; + return ` let ${name} = tdbin::scalar::${p.from}(r.scalar(at, ${rsNumber(p.slot)})?);`; + case "boolBit": + return ` let ${name} = r.bool_bit(at, ${rsNumber(p.slot)}, ${rsNumber(p.bit)})?;`; + case "dateTime": + return ` let ${name} = ${dateTimeValue(`r.scalar(at, ${rsNumber(p.slot)})?`)};`; + case "bytes16": + return ` let ${name} = ${bytes16Value(p.semantic, `tdbin::scalar::bytes16_from_words(r.scalar(at, ${rsNumber(p.slot)})?, r.scalar(at, ${rsNumber(p.slot + 1)})?)`)};`; case "optScalar": return [ - ` let ${name}_present = r.scalar(at, ${p.presenceSlot})? != 0;`, - ` let ${name}_value = tdbin::scalar::${p.from}(r.scalar(at, ${p.valueSlot})?);`, + ` let ${name}_present = r.scalar(at, ${rsNumber(p.presenceSlot)})? != 0;`, + ` let ${name}_value = tdbin::scalar::${p.from}(r.scalar(at, ${rsNumber(p.valueSlot)})?);`, ` let ${name} = ${name}_present.then_some(${name}_value);`, ].join("\n"); + case "optDateTime": + return [ + ` let ${name}_present = r.scalar(at, ${rsNumber(p.presenceSlot)})? != 0;`, + ` let ${name} = if ${name}_present { Some(${dateTimeValue(`r.scalar(at, ${rsNumber(p.valueSlot)})?`)}) } else { None };`, + ].join("\n"); + case "optBytes16": + return [ + ` let ${name}_present = r.scalar(at, ${rsNumber(p.presenceSlot)})? != 0;`, + ` let ${name} = if ${name}_present {`, + ` Some(${bytes16Value(p.semantic, `tdbin::scalar::bytes16_from_words(r.scalar(at, ${rsNumber(p.valueSlot)})?, r.scalar(at, ${rsNumber(p.valueSlot + 1)})?)`)})`, + ` } else {`, + ` None`, + ` };`, + ].join("\n"); case "string": - return ` let ${name} = r.string(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; + return ` let ${name} = r.string(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${optTail(p.optional)};`; case "bytes": - return ` let ${name} = r.bytes(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; + return ` let ${name} = r.bytes(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${optTail(p.optional)};`; case "child": - return ` let ${name} = r.child::<${p.rustType}>(at, Self::DATA_WORDS, ${p.slot})${optTail(p.optional)};`; + return ` let ${name} = r.child::<${p.rustType}>(at, Self::DATA_WORDS, ${rsNumber(p.slot)})${optTail(p.optional)};`; + case "list": + return readList(name, p); } }; const emitRecordCodec = (rec: ResolvedRecord, plan: RecordPlan): string => [ `impl tdbin::Struct for ${rec.name} {`, - ` const DATA_WORDS: u16 = ${plan.dataWords};`, - ` const PTR_WORDS: u16 = ${plan.ptrWords};`, + ` const DATA_WORDS: u16 = ${rsNumber(plan.dataWords)};`, + ` const PTR_WORDS: u16 = ${rsNumber(plan.ptrWords)};`, ``, ` fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> {`, ...plan.fields.map((f) => writeField(f.name, f.plan)), @@ -213,26 +691,32 @@ const emitRecordCodec = (rec: ResolvedRecord, plan: RecordPlan): string => const writeVariantArm = (v: UnionPlan["variants"][number]): string => { const head = ` Self::${v.name}`; if (v.payload === null) { - return `${head} => {\n w.scalar(at, 0, ${v.ordinal})?;\n Ok(())\n }`; + return `${head} => {\n w.scalar(at, 0, ${rsNumber(v.ordinal)})?;\n Ok(())\n }`; } - const call = v.payload.kind === "child" ? `w.child(at, Self::DATA_WORDS, 0, Some(payload))` : `w.string(at, Self::DATA_WORDS, 0, Some(payload))`; - return `${head}(payload) => {\n w.scalar(at, 0, ${v.ordinal})?;\n ${call}\n }`; + const call = + v.payload.kind === "child" + ? `w.child(at, Self::DATA_WORDS, 0, Some(payload))` + : `w.string(at, Self::DATA_WORDS, 0, Some(payload))`; + return `${head}(payload) => {\n w.scalar(at, 0, ${rsNumber(v.ordinal)})?;\n ${call}\n }`; }; const readVariantArm = (v: UnionPlan["variants"][number]): string => { const nn = "?.ok_or(tdbin::DecodeError::UnexpectedNull)?"; if (v.payload === null) { - return ` ${v.ordinal} => Ok(Self::${v.name}),`; + return ` ${rsNumber(v.ordinal)} => Ok(Self::${v.name}),`; } - const read = v.payload.kind === "child" ? `r.child::<${v.payload.rustType}>(at, Self::DATA_WORDS, 0)${nn}` : `r.string(at, Self::DATA_WORDS, 0)${nn}`; - return ` ${v.ordinal} => Ok(Self::${v.name}(${read})),`; + const read = + v.payload.kind === "child" + ? `r.child::<${v.payload.rustType}>(at, Self::DATA_WORDS, 0)${nn}` + : `r.string(at, Self::DATA_WORDS, 0)${nn}`; + return ` ${rsNumber(v.ordinal)} => Ok(Self::${v.name}(${read})),`; }; const emitUnionCodec = (u: ResolvedUnion, plan: UnionPlan): string => [ `impl tdbin::Struct for ${u.name} {`, ` const DATA_WORDS: u16 = 1;`, - ` const PTR_WORDS: u16 = ${plan.ptrWords};`, + ` const PTR_WORDS: u16 = ${rsNumber(plan.ptrWords)};`, ``, ` fn write_struct(&self, w: &mut tdbin::Writer, at: usize) -> Result<(), tdbin::EncodeError> {`, ` match self {`, @@ -258,7 +742,7 @@ export const emitRustCodec = (model: Model): Result => { return err(diag(`tdbin: generic decl '${d.name}' must be monomorphized before codec generation`)); } if (d.kind === "record") { - const plan = classifyRecord(d); + const plan = classifyRecord(model.decls, d); if (!plan.ok) { return plan; } diff --git a/packages/typediagram/src/converters/rust.ts b/packages/typediagram/src/converters/rust.ts index 0d64388..8ba1427 100644 --- a/packages/typediagram/src/converters/rust.ts +++ b/packages/typediagram/src/converters/rust.ts @@ -299,18 +299,30 @@ export const emitRustDecl = (d: ResolvedDecl, docs = false): string[] => { const genericsStr = d.generics.length > 0 ? `<${d.generics.join(", ")}>` : ""; const lead = docs ? [rustDoc("", d.name, d.kind)] : []; const field = (f: ResolvedField): string => - docs ? `${rustDoc(" ", f.name, "field")}\n pub ${f.name}: ${mapTdToRs(f.type)},` : ` pub ${f.name}: ${mapTdToRs(f.type)},`; + docs + ? `${rustDoc(" ", f.name, "field")}\n pub ${f.name}: ${mapTdToRs(f.type)},` + : ` pub ${f.name}: ${mapTdToRs(f.type)},`; if (d.kind === "record") { return [...lead, `pub struct ${d.name}${genericsStr} {`, ...d.fields.map(field), "}", ""]; } if (d.kind === "union") { const header = d.untagged === true ? ["#[serde(untagged)]"] : []; - return [...lead, ...header, `pub enum ${d.name}${genericsStr} {`, ...d.variants.map((v) => emitRustVariant(v, docs)), "}", ""]; + return [ + ...lead, + ...header, + `pub enum ${d.name}${genericsStr} {`, + ...d.variants.map((v) => emitRustVariant(v, docs)), + "}", + "", + ]; } return [...lead, `pub type ${d.name}${genericsStr} = ${mapTdToRs(d.target)};`, ""]; }; -const toRust = (model: Model): string => visibleDeclsForTarget(model.decls, "rust").flatMap((d) => emitRustDecl(d)).join("\n"); +const toRust = (model: Model): string => + visibleDeclsForTarget(model.decls, "rust") + .flatMap((d) => emitRustDecl(d)) + .join("\n"); export const rust: Converter = { language: "rust", diff --git a/packages/typediagram/src/layout/elk.ts b/packages/typediagram/src/layout/elk.ts index 4276177..12099b2 100644 --- a/packages/typediagram/src/layout/elk.ts +++ b/packages/typediagram/src/layout/elk.ts @@ -318,7 +318,7 @@ export async function warmupLayout(): Promise { ], edges: [{ id: "e", sources: ["a"], targets: ["b"] }], }; - await getElk().layout(trivial as unknown as Parameters["layout"]>[0]); + await getElk().layout(trivial); warmedUp = true; } @@ -379,9 +379,7 @@ function layoutError(e: unknown): Result { export async function layout(model: Model, opts: LayoutOpts = {}): Promise> { const { pre, graph, edgeMap } = prepare(model, opts); try { - const result = (await getElk().layout( - graph as unknown as Parameters["layout"]>[0] - )) as unknown as ElkResult; + const result = (await getElk().layout(graph)) as unknown as ElkResult; warmedUp = true; return ok(projectResult(pre, edgeMap, result)); } catch (e) { diff --git a/packages/typediagram/test/converters/go.test.ts b/packages/typediagram/test/converters/go.test.ts index f42c3fd..96ff075 100644 --- a/packages/typediagram/test/converters/go.test.ts +++ b/packages/typediagram/test/converters/go.test.ts @@ -182,6 +182,79 @@ type Foo = string expect(model.decls[0]?.kind).toBe("record"); }); + it("parses nested generics, marker-method unions, embedded interfaces, and malformed trailing bodies", () => { + const src = ` +type Box[T any, U comparable] struct { + Items []map[string]Foo[int64, []string] + Maybe *Foo[Bar[int64, string], Baz] + Inline struct { Name string } + NestedMap map[Foo[Bar]]string + Broken map[string + ignored +} + +type Event interface { + isEvent() +} + +type EventCreated struct { + ID string + Labels map[string]map[string]int64 +} + +type EventEmpty struct {} + +func (EventCreated) isEvent() {} +func (EventEmpty) isEvent() {} + +type Embedded interface { + // comment + Text + isEmbedded() + Image +} + +type Text struct { + Body string +} + +type Image struct {} +type Alias[T any] = Foo[T] +type Bad = struct +type AlsoBad = interface +type Missing struct { +`; + const model = unwrap(go.fromSource(src)); + const box = model.decls.find((d) => d.name === "Box"); + expect(box?.kind).toBe("record"); + expect(box?.generics).toEqual(["T", "U"]); + const fields = box?.kind === "record" ? box.fields : []; + expect(fields.find((f) => f.name === "Items")?.type.name).toBe("List"); + expect(fields.find((f) => f.name === "Items")?.type.args[0]?.name).toBe("Map"); + expect(fields.find((f) => f.name === "Maybe")?.type.name).toBe("Option"); + expect(fields.find((f) => f.name === "Inline")?.type.name).toBe("struct { Name string }"); + expect(fields.find((f) => f.name === "NestedMap")?.type.args[0]?.name).toBe("Foo"); + expect(fields.find((f) => f.name === "Broken")?.type.name).toBe("map[string"); + + const event = model.decls.find((d) => d.name === "Event"); + expect(event?.kind).toBe("union"); + const eventVariants = event?.kind === "union" ? event.variants : []; + expect(eventVariants.map((v) => v.name)).toEqual(["Created", "Empty"]); + expect(eventVariants[0]?.fields[1]?.type.args[1]?.name).toBe("Map"); + expect(eventVariants[1]?.fields).toEqual([]); + + const embedded = model.decls.find((d) => d.name === "Embedded"); + expect(embedded?.kind).toBe("union"); + expect(embedded?.kind === "union" ? embedded.variants.map((v) => v.name) : []).toEqual(["Text", "Image"]); + + const aliasDecl = model.decls.find((d) => d.name === "Alias"); + expect(aliasDecl?.kind).toBe("alias"); + expect(aliasDecl?.kind === "alias" ? aliasDecl.target.args[0]?.name : "").toBe("T"); + expect(model.decls.some((d) => d.name === "Bad")).toBe(false); + expect(model.decls.some((d) => d.name === "AlsoBad")).toBe(false); + expect(model.decls.some((d) => d.name === "Missing")).toBe(false); + }); + it("returns error on Go file with only functions", () => { const src = ` package main diff --git a/packages/typediagram/test/converters/rust-tdbin.test.ts b/packages/typediagram/test/converters/rust-tdbin.test.ts index 425758d..8e3e585 100644 --- a/packages/typediagram/test/converters/rust-tdbin.test.ts +++ b/packages/typediagram/test/converters/rust-tdbin.test.ts @@ -54,14 +54,19 @@ describe("[CONV-RUST-TDBIN] record + union codec structure", () => { it("bakes DATA_WORDS/PTR_WORDS and slot-addressed scalar/pointer field codecs", () => { const code = codecFor(PERSON_TD); // Address: one scalar (zip) + one pointer (street). - expect(code).toMatch(/impl tdbin::Struct for Address \{\n const DATA_WORDS: u16 = 1;\n const PTR_WORDS: u16 = 1;/); + expect(code).toMatch( + /impl tdbin::Struct for Address \{\n[ ]{4}const DATA_WORDS: u16 = 1;\n[ ]{4}const PTR_WORDS: u16 = 1;/ + ); // Person: three scalars (age/active/score), four pointers (name/address/nickname/contact). - expect(code).toMatch(/impl tdbin::Struct for Person \{\n const DATA_WORDS: u16 = 3;\n const PTR_WORDS: u16 = 4;/); - // Each scalar kind maps to its bit codec at a data slot. + expect(code).toMatch( + /impl tdbin::Struct for Person \{\n[ ]{4}const DATA_WORDS: u16 = 3;\n[ ]{4}const PTR_WORDS: u16 = 4;/ + ); + // Word scalars map to scalar codecs; Bool maps to a packed bit. expect(code).toContain("w.scalar(at, 0, tdbin::scalar::i64_bits(self.age))?;"); - expect(code).toContain("w.scalar(at, 1, tdbin::scalar::bool_bits(self.active))?;"); + expect(code).toContain("w.bool_bit(at, 1, 0, self.active)?;"); expect(code).toContain("w.scalar(at, 2, tdbin::scalar::f64_bits(self.score))?;"); expect(code).toContain("let age = tdbin::scalar::i64_from(r.scalar(at, 0)?);"); + expect(code).toContain("let active = r.bool_bit(at, 1, 0)?;"); }); it("distinguishes required vs optional pointer fields on read and write", () => { @@ -77,12 +82,16 @@ describe("[CONV-RUST-TDBIN] record + union codec structure", () => { expect(code).toContain("let address = r.child::
(at, Self::DATA_WORDS, 1)?;"); // Required child union: write Some(&..), read unwraps null. expect(code).toContain("w.child(at, Self::DATA_WORDS, 3, Some(&self.contact))?;"); - expect(code).toContain("let contact = r.child::(at, Self::DATA_WORDS, 3)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;"); + expect(code).toContain( + "let contact = r.child::(at, Self::DATA_WORDS, 3)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;" + ); }); it("emits union discriminant arms as Self:: with an UnknownVariant fallback", () => { const code = codecFor(PERSON_TD); - expect(code).toMatch(/impl tdbin::Struct for Contact \{\n const DATA_WORDS: u16 = 1;\n const PTR_WORDS: u16 = 1;/); + expect(code).toMatch( + /impl tdbin::Struct for Contact \{\n[ ]{4}const DATA_WORDS: u16 = 1;\n[ ]{4}const PTR_WORDS: u16 = 1;/ + ); expect(code).toContain("Self::Email(payload) => {"); expect(code).toContain("w.scalar(at, 0, 0)?;"); expect(code).toContain("w.scalar(at, 0, 1)?;"); @@ -94,21 +103,41 @@ describe("[CONV-RUST-TDBIN] record + union codec structure", () => { it("routes Bytes and Option through the pointer section", () => { const code = codecFor(`type Blob {\n avatar: Bytes\n thumb: Option\n}`); expect(code).toContain("w.bytes(at, Self::DATA_WORDS, 0, Some(&self.avatar))?;"); - expect(code).toContain("let avatar = r.bytes(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;"); + expect(code).toContain( + "let avatar = r.bytes(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?;" + ); expect(code).toContain("w.bytes(at, Self::DATA_WORDS, 1, self.thumb.as_deref())?;"); expect(code).toContain("let thumb = r.bytes(at, Self::DATA_WORDS, 1)?;"); }); + it("packs direct Bool fields into reusable bitset words", () => { + const code = codecFor(`type Flags {\n a: Bool\n count: Int\n b: Bool\n c: Bool\n}`); + expect(code).toMatch( + /impl tdbin::Struct for Flags \{\n[ ]{4}const DATA_WORDS: u16 = 2;\n[ ]{4}const PTR_WORDS: u16 = 0;/ + ); + expect(code).toContain("w.bool_bit(at, 0, 0, self.a)?;"); + expect(code).toContain("w.scalar(at, 1, tdbin::scalar::i64_bits(self.count))?;"); + expect(code).toContain("w.bool_bit(at, 0, 1, self.b)?;"); + expect(code).toContain("w.bool_bit(at, 0, 2, self.c)?;"); + expect(code).toContain("let b = r.bool_bit(at, 0, 1)?;"); + }); + it("emits string-payload, bare, and all-bare union arms", () => { - const code = codecFor(`type E {\n addr: String\n}\nunion Msg {\n Mail(E)\n Sms(String)\n Empty\n}\nunion Color {\n Red\n Green\n}`); + const code = codecFor( + `type E {\n addr: String\n}\nunion Msg {\n Mail(E)\n Sms(String)\n Empty\n}\nunion Color {\n Red\n Green\n}` + ); // String-payload variant (ordinal 1) round-trips a raw string in slot 0. expect(code).toContain("w.string(at, Self::DATA_WORDS, 0, Some(payload))"); - expect(code).toContain("1 => Ok(Self::Sms(r.string(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?)),"); + expect(code).toContain( + "1 => Ok(Self::Sms(r.string(at, Self::DATA_WORDS, 0)?.ok_or(tdbin::DecodeError::UnexpectedNull)?))," + ); // Bare variant inside a mixed union: discriminant only, no payload. expect(code).toContain("Self::Empty => {"); expect(code).toContain("2 => Ok(Self::Empty),"); // An all-bare union needs no pointer section. - expect(code).toMatch(/impl tdbin::Struct for Color \{\n const DATA_WORDS: u16 = 1;\n const PTR_WORDS: u16 = 0;/); + expect(code).toMatch( + /impl tdbin::Struct for Color \{\n[ ]{4}const DATA_WORDS: u16 = 1;\n[ ]{4}const PTR_WORDS: u16 = 0;/ + ); expect(code).toContain("0 => Ok(Self::Red),"); }); }); @@ -117,7 +146,9 @@ describe("[CONV-RUST-TDBIN] Option presence + value slots", () => { it("allocates a presence slot then a value slot per Option ([TDBIN-PRIM-OPTION])", () => { const code = codecFor(MEASUREMENT_TD); // label (String) is the sole pointer; three Option fill 6 data words. - expect(code).toMatch(/impl tdbin::Struct for Measurement \{\n const DATA_WORDS: u16 = 6;\n const PTR_WORDS: u16 = 1;/); + expect(code).toMatch( + /impl tdbin::Struct for Measurement \{\n[ ]{4}const DATA_WORDS: u16 = 6;\n[ ]{4}const PTR_WORDS: u16 = 1;/ + ); // Write: presence = is_some(), value = map_or(0, codec) so None writes zeros. expect(code).toContain("w.scalar(at, 0, u64::from(self.count.is_some()))?;"); expect(code).toContain("w.scalar(at, 1, self.count.map_or(0, tdbin::scalar::i64_bits))?;"); @@ -132,6 +163,102 @@ describe("[CONV-RUST-TDBIN] Option presence + value slots", () => { }); }); +describe("[CONV-RUST-TDBIN] semantic scalar byte layouts", () => { + it("emits DateTime as i64 micros and Uuid/Decimal as two 8-byte words", () => { + const code = codecFor( + `type Audit {\n createdAt: DateTime\n expiresAt: Option\n id: Uuid\n amount: Decimal\n parent: Option\n}` + ); + expect(code).toMatch( + /impl tdbin::Struct for Audit \{\n[ ]{4}const DATA_WORDS: u16 = 10;\n[ ]{4}const PTR_WORDS: u16 = 0;/ + ); + expect(code).toContain("tdbin::scalar::i64_bits(self.createdAt.timestamp_micros())"); + expect(code).toContain( + "self.expiresAt.as_ref().map_or(0, |value| tdbin::scalar::i64_bits(value.timestamp_micros()))" + ); + expect(code).toContain("let expiresAt_present = r.scalar(at, 1)? != 0;"); + expect(code).toContain("let id_words = tdbin::scalar::bytes16_words(self.id.as_bytes());"); + expect(code).toContain("let amount_words = tdbin::scalar::bytes16_words(&self.amount.serialize());"); + expect(code).toContain( + "let parent_words = self.parent.as_ref().map(|value| tdbin::scalar::bytes16_words(value.as_bytes()));" + ); + expect(code).toContain("chrono::DateTime::::from_timestamp_micros"); + expect(code).toContain("uuid::Uuid::from_bytes(tdbin::scalar::bytes16_from_words"); + expect(code).toContain("rust_decimal::Decimal::deserialize(tdbin::scalar::bytes16_from_words"); + }); +}); + +describe("[CONV-RUST-TDBIN] list codecs", () => { + it("emits raw, pointer, composite, semantic, optional, and enum list codecs", () => { + const code = codecFor( + `type Point {\n x: Int\n y: Int\n}\nunion Color {\n Red\n Green\n}\ntype Lists {\n flags: List\n scores: List\n tags: List\n blobs: List\n points: List\n ids: List\n colors: List\n maybeScores: Option>\n}` + ); + expect(code).toMatch( + /impl tdbin::Struct for Lists \{\n[ ]{4}const DATA_WORDS: u16 = 0;\n[ ]{4}const PTR_WORDS: u16 = 8;/ + ); + expect(code).toContain("w.bool_list(at, Self::DATA_WORDS, 0, Some(&self.flags))?;"); + expect(code).toContain( + "let scores_words = self.scores.iter().map(|value| tdbin::scalar::i64_bits(*value)).collect::>();" + ); + expect(code).toContain("w.word_list(at, Self::DATA_WORDS, 1, Some(&scores_words))?;"); + expect(code).toContain("w.string_list(at, Self::DATA_WORDS, 2, Some(&self.tags))?;"); + expect(code).toContain("w.bytes_list(at, Self::DATA_WORDS, 3, Some(&self.blobs))?;"); + expect(code).toContain("w.child_list(at, Self::DATA_WORDS, 4, Some(&self.points))?;"); + expect(code).toContain("w.bytes16_list(at, Self::DATA_WORDS, 5, Some(&ids_words))?;"); + expect(code).toContain("&Color::Red => 0u8,"); + expect(code).toContain("w.byte_list(at, Self::DATA_WORDS, 6, Some(&colors_ordinals))?;"); + expect(code).toContain("let maybeScores_words = self.maybeScores.as_ref().map"); + expect(code).toContain("w.word_list(at, Self::DATA_WORDS, 7, maybeScores_words.as_deref())?;"); + expect(code).toContain("let flags = r.bool_list(at, Self::DATA_WORDS, 0)?.unwrap_or_default();"); + expect(code).toContain( + "let scores = r.word_list(at, Self::DATA_WORDS, 1)?.unwrap_or_default().into_iter().map(tdbin::scalar::i64_from).collect::>();" + ); + expect(code).toContain("let tags = r.string_list(at, Self::DATA_WORDS, 2)?.unwrap_or_default();"); + expect(code).toContain("let blobs = r.bytes_list(at, Self::DATA_WORDS, 3)?.unwrap_or_default();"); + expect(code).toContain("let points = r.child_list::(at, Self::DATA_WORDS, 4)?.unwrap_or_default();"); + expect(code).toContain("let ids = r.bytes16_list(at, Self::DATA_WORDS, 5)?.unwrap_or_default()"); + expect(code).toContain("0 => Ok(Color::Red),"); + expect(code).toContain("ordinal => Err(tdbin::DecodeError::UnknownVariant { ordinal: u64::from(ordinal) })"); + expect(code).toContain( + "let maybeScores = r.word_list(at, Self::DATA_WORDS, 7)?.map(|values| values.into_iter().map(tdbin::scalar::i64_from).collect::>());" + ); + }); + + it("emits optional DateTime, bytes16, and enum list branches", () => { + const code = codecFor( + `union Color {\n Red\n Green\n}\ntype MaybeLists {\n history: Option>\n ids: Option>\n colors: Option>\n}` + ); + expect(code).toContain( + "let history_words = self.history.as_ref().map(|values| values.iter().map(|value| tdbin::scalar::i64_bits(value.timestamp_micros())).collect::>());" + ); + expect(code).toContain("w.word_list(at, Self::DATA_WORDS, 0, history_words.as_deref())?;"); + expect(code).toContain( + "let ids_words = self.ids.as_ref().map(|values| values.iter().map(|value| tdbin::scalar::bytes16_words(value.as_bytes())).collect::>());" + ); + expect(code).toContain("w.bytes16_list(at, Self::DATA_WORDS, 1, ids_words.as_deref())?;"); + expect(code).toContain("let colors_ordinals = self.colors.as_ref().map(|values| values.iter().map"); + expect(code).toContain("w.byte_list(at, Self::DATA_WORDS, 2, colors_ordinals.as_deref())?;"); + expect(code).toContain("let history = match r.word_list(at, Self::DATA_WORDS, 0)? {"); + expect(code).toContain("Some(values) => Some(values.into_iter().map(|word| chrono::DateTime"); + expect(code).toContain("let ids = r.bytes16_list(at, Self::DATA_WORDS, 1)?.map"); + expect(code).toContain("let colors = match r.byte_list(at, Self::DATA_WORDS, 2)? {"); + }); + + it("uses composite lists for mixed unions", () => { + const code = codecFor( + `type Payload {\n label: String\n}\nunion Event {\n Seen(Payload)\n Empty\n}\ntype Stream {\n events: List\n}` + ); + expect(code).toContain("w.child_list(at, Self::DATA_WORDS, 0, Some(&self.events))?;"); + expect(code).toContain("let events = r.child_list::(at, Self::DATA_WORDS, 0)?.unwrap_or_default();"); + }); + + it("rejects List when one-byte ordinals would overflow", () => { + const variants = Array.from({ length: 257 }, (_, i) => ` V${String(i)}`).join("\n"); + const r = emitRustCodec(modelFor(`union Wide {\n${variants}\n}\ntype R {\n values: List\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("List 'Wide' has ordinals >= 256"); + }); +}); + describe("[CONV-RUST-TDBIN] generateRustModule assembles a deny-all-clean module", () => { it("emits doc comments, derives, aliases, and the codec together", () => { const mod = unwrap(generateRustModule(modelFor(`alias Id = Int\ntype Tag {\n label: String\n}`))); @@ -146,17 +273,56 @@ describe("[CONV-RUST-TDBIN] generateRustModule assembles a deny-all-clean module describe("[CONV-RUST-TDBIN] fails loudly on unsupported shapes (no placeholders)", () => { it("rejects an unsupported field type", () => { - const r = emitRustCodec(modelFor(`type R {\n items: List\n}`)); + const r = emitRustCodec(modelFor(`type R {\n items: List>\n}`)); expect(r.ok).toBe(false); expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type"); }); it("rejects an Option over an unsupported inner type", () => { - const r = emitRustCodec(modelFor(`type R {\n x: Option>\n}`)); + const r = emitRustCodec(modelFor(`type R {\n x: Option>\n}`)); expect(r.ok).toBe(false); expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type"); }); + // review finding `map-any`: Map and Any have no v0 wire encoding, so the + // codec must reject them LOUDLY as a typed Diagnostic (never a placeholder), + // naming the exact type. No wire form is promised for these in v0. + it("rejects a Map field with a typed error naming the type", () => { + const r = emitRustCodec(modelFor(`type R {\n m: Map\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type 'Map'"); + }); + + it("rejects an Any field with a typed error naming the type", () => { + const r = emitRustCodec(modelFor(`type R {\n a: Any\n}`)); + expect(r.ok).toBe(false); + expect(r.ok ? "" : r.error[0]?.message).toContain("unsupported field type 'Any'"); + }); + + it("rejects Option before it can alias null", () => { + const r = emitRustCodec(modelFor(`type Empty {\n}\ntype Holder {\n maybe: Option\n}`)); + expect(r.ok).toBe(false); + const message = r.ok ? "" : r.error[0]?.message; + expect(message).toContain("Option 'Option'"); + expect(message).toContain("Holder.maybe"); + }); + + it("rejects empty-record child pointers until v0 has a non-null marker", () => { + const r = emitRustCodec(modelFor(`type Empty {\n}\ntype Holder {\n value: Empty\n}`)); + expect(r.ok).toBe(false); + const message = r.ok ? "" : r.error[0]?.message; + expect(message).toContain("empty-record pointer 'Empty' has no non-null v0 marker"); + expect(message).toContain("Holder.value"); + }); + + it("rejects List before composite count would lose element identity", () => { + const r = emitRustCodec(modelFor(`type Empty {\n}\ntype Holder {\n values: List\n}`)); + expect(r.ok).toBe(false); + const message = r.ok ? "" : r.error[0]?.message; + expect(message).toContain("empty-record pointer 'Empty' has no non-null v0 marker"); + expect(message).toContain("Holder.values"); + }); + it("rejects a generic decl that was not monomorphized", () => { const r = emitRustCodec(modelFor(`type Box {\n value: T\n}`)); expect(r.ok).toBe(false); @@ -176,7 +342,7 @@ describe("[CONV-RUST-TDBIN] fails loudly on unsupported shapes (no placeholders) }); it("propagates codec errors through generateRustModule", () => { - const r = generateRustModule(modelFor(`type R {\n items: List\n}`)); + const r = generateRustModule(modelFor(`type R {\n items: List>\n}`)); expect(r.ok).toBe(false); }); }); diff --git a/packages/typediagram/test/converters/typescript.test.ts b/packages/typediagram/test/converters/typescript.test.ts index 040ee5a..43f8e0e 100644 --- a/packages/typediagram/test/converters/typescript.test.ts +++ b/packages/typediagram/test/converters/typescript.test.ts @@ -182,6 +182,37 @@ export default function main() {} `; expect(typescript.fromSource(src).ok).toBe(false); }); + + it("skips malformed fields and aliases while preserving unusual union variants", () => { + const src = ` +interface Weird { + good: string; + badline; + nested: Map>; +} + +type Odd = + | { nope; kind: "Named"; payload: string } + | { value: number }; + +type Missing = Foo +`; + const model = unwrap(typescript.fromSource(src)); + const weird = model.decls.find((d) => d.name === "Weird"); + expect(weird?.kind).toBe("record"); + const fields = weird?.kind === "record" ? weird.fields : []; + expect(fields.map((f) => f.name)).toEqual(["good", "nested"]); + expect(fields[1]?.type.name).toBe("Map"); + + const odd = model.decls.find((d) => d.name === "Odd"); + expect(odd?.kind).toBe("union"); + const variants = odd?.kind === "union" ? odd.variants : []; + expect(variants[0]?.name).toBe("Named"); + expect(variants[0]?.fields[0]?.name).toBe("payload"); + expect(variants[1]?.name).toContain("value"); + expect(variants[1]?.fields[0]?.name).toBe("value"); + expect(model.decls.some((d) => d.name === "Missing")).toBe(false); + }); }); describe("[CONV-TS-TO-COMPLEX] complex typeDiagram -> TypeScript", () => { diff --git a/packages/typediagram/test/elk-project.test.ts b/packages/typediagram/test/elk-project.test.ts new file mode 100644 index 0000000..d7e10fc --- /dev/null +++ b/packages/typediagram/test/elk-project.test.ts @@ -0,0 +1,76 @@ +// [ELK-PROJECT-TEST] Covers layout projection branches that real ELK rarely emits. +import { describe, expect, it, vi } from "vitest"; + +let returnedEdgeId = ""; + +vi.mock("elkjs/lib/elk.bundled.js", () => { + const MockELK = function (this: { layout: () => Promise }) { + this.layout = () => + Promise.resolve({ + width: 320, + height: 180, + children: [{ id: "Ref" }, { id: "Missing" }], + edges: [ + { id: returnedEdgeId }, + { + id: "unknown-edge", + sections: [ + { + startPoint: { x: 0, y: 0 }, + endPoint: { x: 1, y: 1 }, + }, + ], + }, + ], + }); + }; + return { default: MockELK }; +}); + +import { layout } from "../src/layout/elk.js"; +import { buildModel } from "../src/model/index.js"; +import { parse } from "../src/parser/index.js"; + +function unwrap(r: { ok: true; value: T } | { ok: false; error: unknown }): T { + if (!r.ok) { + throw new Error(`expected ok: ${JSON.stringify(r.error)}`); + } + return r.value; +} + +describe("[ELK-PROJECT] layout projection defaults and filters", () => { + it("drops unknown ELK children/edges and defaults missing geometry", async () => { + const model = unwrap( + buildModel( + unwrap( + parse(` +type Ref { + shape: Shape +} + +union Shape { + Point { x: Int } + Line(Int, String) + Empty +} +`) + ) + ) + ); + const edge = model.edges[0]; + if (edge === undefined) { + throw new Error("expected model edge"); + } + returnedEdgeId = `${edge.sourceDeclName}:${String(edge.sourceRowIndex)}:${edge.targetDeclName}:${edge.kind}`; + + const result = unwrap(await layout(model)); + expect(result.width).toBe(320); + expect(result.height).toBe(180); + expect(result.nodes.map((n) => n.id)).toEqual(["Ref"]); + expect(result.nodes[0]?.x).toBe(0); + expect(result.nodes[0]?.width).toBeGreaterThan(0); + expect(result.edges).toHaveLength(1); + expect(result.edges[0]?.id).toBe(returnedEdgeId); + expect(result.edges[0]?.points).toEqual([]); + }); +}); diff --git a/packages/typediagram/test/index.test.ts b/packages/typediagram/test/index.test.ts index f77a3d8..6b74e15 100644 --- a/packages/typediagram/test/index.test.ts +++ b/packages/typediagram/test/index.test.ts @@ -16,17 +16,24 @@ describe("[INDEX-RENDER] render() browser function", () => { it("returns SVGElement when DOMParser is available", async () => { const mockElement = { tagName: "svg" }; const mockDoc = { documentElement: mockElement }; - const mockParser = { parseFromString: vi.fn(() => mockDoc) }; - // @ts-expect-error stubbing global DOMParser - globalThis.DOMParser = vi.fn(() => mockParser); + const parseFromString = vi.fn(() => mockDoc); + const originalDomParser = globalThis.DOMParser; + const MockDOMParser = function (this: { parseFromString: typeof parseFromString }) { + this.parseFromString = parseFromString; + }; + // Safe: this test installs the minimal constructor shape render() uses. + globalThis.DOMParser = MockDOMParser as unknown as typeof DOMParser; try { const r = await render("type Foo { x: String }"); expect(r.ok).toBe(true); expect(r.ok && r.value).toBe(mockElement); - expect(mockParser.parseFromString).toHaveBeenCalledWith(expect.stringContaining(" { expect(result.h).toBeCloseTo(2 * 10 * 1.2); }); + it("keeps the current widest line when later lines are shorter", () => { + const result = measureBlock(["hello world", "hi"], 10); + expect(result.w).toBeCloseTo(11 * 0.6 * 10); + expect(result.h).toBeCloseTo(2 * 10 * 1.2); + }); + it("measures empty block", () => { const result = measureBlock([], 10); expect(result.w).toBe(0); diff --git a/packages/typediagram/test/render.test.ts b/packages/typediagram/test/render.test.ts index 1ffd404..36f9435 100644 --- a/packages/typediagram/test/render.test.ts +++ b/packages/typediagram/test/render.test.ts @@ -1,6 +1,8 @@ import { describe, expect, it } from "vitest"; import { renderToString } from "../src/index.js"; import { escapeAttr, escapeText, svg, raw } from "../src/render-svg/svg-tag.js"; +import { renderSvg } from "../src/render-svg/index.js"; +import type { LaidOutGraph } from "../src/layout/types.js"; import { CHAT_EXAMPLE, SMALL_EXAMPLE } from "./fixtures.js"; function unwrap(r: { ok: true; value: T } | { ok: false; error: unknown }): T { @@ -134,6 +136,20 @@ describe("render — svg-tag escaping", () => { expect(result.value).toContain("inner"); }); + it("svg tagged template skips undefined runtime values", () => { + // Safe: this deliberately exercises the runtime guard for malformed callers. + const strings = [""] as unknown as TemplateStringsArray; + const result = svg(strings, undefined as unknown as string); + expect(result.value).toBe(""); + }); + + it("svg tagged template tolerates missing trailing string chunks", () => { + // Safe: this deliberately exercises the runtime fallback for malformed callers. + const strings = [""] as unknown as TemplateStringsArray; + const result = svg(strings, 1); + expect(result.value).toBe("1"); + }); + it("raw creates a SafeSvg", () => { const s = raw("test"); expect(s.value).toBe("test"); @@ -144,4 +160,47 @@ describe("render — svg-tag escaping", () => { const r = await renderToString("type Foo { x: String }\nalias Bar = Foo"); expect(r.ok).toBe(true); }); + + it("render skips edge routes with fewer than two points", () => { + const graph: LaidOutGraph = { + width: 10, + height: 10, + nodes: [], + edges: [ + { + id: "short", + sourceNodeId: "a", + targetNodeId: "b", + points: [{ x: 1, y: 1 }], + label: "short", + kind: "field", + }, + ], + }; + const out = renderSvg(graph); + expect(out).toContain(" { + const graph: LaidOutGraph = { + width: 10, + height: 10, + nodes: [], + edges: [ + { + id: "bad", + sourceNodeId: "a", + targetNodeId: "b", + points: [ + { x: 0, y: 0 }, + { x: 1, y: 1 }, + ], + label: "bad", + kind: "genericArg", + }, + ], + }; + expect(() => renderSvg(graph)).toThrow("references unknown node"); + }); }); diff --git a/packages/vscode/test/export-pdf-physical.test.ts b/packages/vscode/test/export-pdf-physical.test.ts index 109d7f6..6609dc3 100644 --- a/packages/vscode/test/export-pdf-physical.test.ts +++ b/packages/vscode/test/export-pdf-physical.test.ts @@ -28,7 +28,9 @@ type SVGtoPDFFn = ( y: number, options?: { width?: number; height?: number; assumePt?: boolean } ) => void; -const SVGtoPDF: SVGtoPDFFn = SVGtoPDFUntyped as unknown as SVGtoPDFFn; +// Safe: svg-to-pdfkit has no types, and this test calls only the documented +// function shape above. +const SVGtoPDF = SVGtoPDFUntyped as unknown as SVGtoPDFFn; import { warmupSyncRender } from "typediagram-core"; import { composeHtml, extractSvgs } from "../src/export-pdf.js"; diff --git a/packages/vscode/test/export-pdf.test.ts b/packages/vscode/test/export-pdf.test.ts index 3b7ff8e..34406ad 100644 --- a/packages/vscode/test/export-pdf.test.ts +++ b/packages/vscode/test/export-pdf.test.ts @@ -93,14 +93,14 @@ function makeDeps(overrides: TestDepsOverrides = {}): { return { deps: { - readFile: readFile as unknown as ExportPdfDeps["readFile"], - writeFile: writeFile as unknown as ExportPdfDeps["writeFile"], - createWebviewPanel: createWebviewPanel as unknown as ExportPdfDeps["createWebviewPanel"], + readFile: readFile, + writeFile: writeFile, + createWebviewPanel: createWebviewPanel, uriWithPath: uriWithPath as unknown as ExportPdfDeps["uriWithPath"], - showInformationMessage: showInformationMessage as unknown as ExportPdfDeps["showInformationMessage"], + showInformationMessage: showInformationMessage, showErrorMessage, - openExternal: openExternal as unknown as ExportPdfDeps["openExternal"], - executeCommand: executeCommand as unknown as ExportPdfDeps["executeCommand"], + openExternal: openExternal, + executeCommand: executeCommand, }, spies: { readFile, @@ -496,7 +496,7 @@ describe("exportPdf composer", () => { it("Open PDF action triggers openExternal on the saved URI", async () => { const { deps, spies } = makeDeps(); - spies.showInformationMessage.mockImplementationOnce(() => Promise.resolve("Open PDF")); + spies.showInformationMessage.mockReturnValueOnce(Promise.resolve("Open PDF")); await exportPdf(SAMPLE_URI, { theme: "light" }, deps); await new Promise((r) => setTimeout(r, 0)); expect(spies.openExternal).toHaveBeenCalledTimes(1); @@ -504,7 +504,7 @@ describe("exportPdf composer", () => { it("Reveal action triggers revealFileInOS command", async () => { const { deps, spies } = makeDeps(); - spies.showInformationMessage.mockImplementationOnce(() => Promise.resolve("Reveal in File Explorer")); + spies.showInformationMessage.mockReturnValueOnce(Promise.resolve("Reveal in File Explorer")); await exportPdf(SAMPLE_URI, { theme: "light" }, deps); await new Promise((r) => setTimeout(r, 0)); expect(spies.executeCommand).toHaveBeenCalledWith("revealFileInOS", expect.anything()); @@ -512,7 +512,7 @@ describe("exportPdf composer", () => { it("logs an error when the notification promise rejects", async () => { const { deps, spies } = makeDeps(); - spies.showInformationMessage.mockImplementationOnce(() => Promise.reject(new Error("notif boom"))); + spies.showInformationMessage.mockReturnValueOnce(Promise.reject(new Error("notif boom"))); await exportPdf(SAMPLE_URI, { theme: "light" }, deps); await new Promise((r) => setTimeout(r, 10)); const lines = mock.mockOutputChannel.appendLine.mock.calls.map((c) => c[0] as string); diff --git a/packages/vscode/test/extension.test.ts b/packages/vscode/test/extension.test.ts index 2ac2447..df6c59a 100644 --- a/packages/vscode/test/extension.test.ts +++ b/packages/vscode/test/extension.test.ts @@ -353,7 +353,7 @@ describe("[VSCODE-EXT] activate", () => { renderer: { rules: { get fence() { - return installedFence as never; + return installedFence; }, set fence(v: unknown) { installedFence = v; @@ -379,7 +379,7 @@ describe("[VSCODE-EXT] activate", () => { })); const { extendMarkdownIt } = await import("../src/extension.js"); const md = { renderer: { rules: {} as Record } }; - extendMarkdownIt(md as never); + extendMarkdownIt(md); // Wait for the warmup microtask chain. Warmup calls into elk which takes ~30-200ms. // We give it a reasonable window. await new Promise((r) => setTimeout(r, 400)); @@ -417,7 +417,7 @@ describe("[VSCODE-EXT] activate", () => { mock.mockOutputChannel.appendLine.mockClear(); const { extendMarkdownIt } = await import("../src/extension.js"); const md = { renderer: { rules: {} as Record } }; - extendMarkdownIt(md as never); + extendMarkdownIt(md); const initialLines = mock.mockOutputChannel.appendLine.mock.calls.map((c) => c[0] as string); // Must have logged that VS Code called us expect(initialLines.some((l) => l.includes("called by VS Code markdown preview"))).toBe(true); @@ -445,7 +445,7 @@ describe("[VSCODE-EXT] activate", () => { mock.commands.executeCommand.mockRejectedValueOnce(new Error("refresh boom")); const { extendMarkdownIt } = await import("../src/extension.js"); const md = { renderer: { rules: {} as Record } }; - extendMarkdownIt(md as never); + extendMarkdownIt(md); await new Promise((r) => setTimeout(r, 400)); const lines = mock.mockOutputChannel.appendLine.mock.calls.map((c) => c[0] as string); expect(lines.some((l) => l.includes("markdown.preview.refresh failed") && l.includes("refresh boom"))).toBe(true); @@ -466,7 +466,7 @@ describe("[VSCODE-EXT] activate", () => { })); const { extendMarkdownIt } = await import("../src/extension.js"); const md = { renderer: { rules: {} as Record } }; - extendMarkdownIt(md as never); + extendMarkdownIt(md); await new Promise((r) => setTimeout(r, 300)); const lines = mock.mockOutputChannel.appendLine.mock.calls.map((c) => c[0] as string); expect(lines.some((l) => l.includes("warmup failed") && l.includes("elk blew up"))).toBe(true); @@ -483,7 +483,7 @@ describe("[VSCODE-EXT] activate", () => { expect(api.extendMarkdownIt).toBe(extendMarkdownIt); // Invoking what VS Code will receive must actually plug into markdown-it const md = { renderer: { rules: {} as Record } }; - const returned = api.extendMarkdownIt(md as never); + const returned = api.extendMarkdownIt(md); expect(returned).toBe(md); expect(typeof md.renderer.rules["fence"]).toBe("function"); }); @@ -534,7 +534,7 @@ describe("[VSCODE-EXT] activate", () => { toString: () => `file://${changes.path}`, }), }; - mock.window.activeTextEditor = { document: { uri: activeUri } as never }; + mock.window.activeTextEditor = { document: { uri: activeUri } }; mock.workspace.fs.readFile = vi.fn(() => Promise.resolve(new TextEncoder().encode("# hi"))); mock.workspace.fs.writeFile = vi.fn(() => Promise.resolve()); await exportHandler?.(); diff --git a/packages/vscode/test/markdown-it-plugin.test.ts b/packages/vscode/test/markdown-it-plugin.test.ts index ecb062c..283be27 100644 --- a/packages/vscode/test/markdown-it-plugin.test.ts +++ b/packages/vscode/test/markdown-it-plugin.test.ts @@ -92,7 +92,7 @@ describe("[VSCODE-MD-PLUGIN] typediagramMarkdownItPlugin", () => { child: () => capture, }; - setPluginLogger(capture as never); + setPluginLogger(capture); render("```typediagram\ntype X { a: Int }\n```"); const renderLog = entries.find((e) => e.msg === "rendered typediagram fence to SVG"); expect(renderLog).toBeDefined(); @@ -115,7 +115,7 @@ describe("[VSCODE-MD-PLUGIN] typediagramMarkdownItPlugin", () => { error: (msg: string) => entries.push({ msg }), child: () => capture, }; - setPluginLogger(capture as never); + setPluginLogger(capture); render("```typediagram\ntype Z { a: Int }\n```"); // The overridden capture logger received logs (not the lazy channel one) expect(entries.some((e) => e.msg === "plugin installed on markdown-it instance")).toBe(true); @@ -137,7 +137,7 @@ describe("[VSCODE-MD-PLUGIN] typediagramMarkdownItPlugin", () => { child: () => capture, }; - setPluginLogger(capture as never); + setPluginLogger(capture); render("```typediagram\ntype X { @bad }\n```"); const errLog = entries.find((e) => e.msg === "typediagram render failed"); expect(errLog).toBeDefined(); diff --git a/packages/vscode/test/vscode-mock.ts b/packages/vscode/test/vscode-mock.ts index a7bacf0..3bfee79 100644 --- a/packages/vscode/test/vscode-mock.ts +++ b/packages/vscode/test/vscode-mock.ts @@ -81,7 +81,7 @@ export const commands = { registerCommand: vi.fn((cmd: string, cb: (...args: unknown[]) => unknown) => { commands._handlers.set(cmd, cb); if (cmd === "typediagram.preview") { - commands._handler = cb as () => void; + commands._handler = cb; } return { dispose: vi.fn() }; }), diff --git a/packages/vscode/tsconfig.build.json b/packages/vscode/tsconfig.build.json index e1f1fb4..f44410d 100644 --- a/packages/vscode/tsconfig.build.json +++ b/packages/vscode/tsconfig.build.json @@ -4,6 +4,7 @@ "module": "ESNext", "moduleResolution": "bundler", "lib": ["ES2022"], + "types": ["node"], "strict": true, "noUncheckedIndexedAccess": true, "exactOptionalPropertyTypes": true, diff --git a/packages/web/e2e/playground.spec.ts b/packages/web/e2e/playground.spec.ts index 20193be..dbb7682 100644 --- a/packages/web/e2e/playground.spec.ts +++ b/packages/web/e2e/playground.spec.ts @@ -43,7 +43,7 @@ const waitForPreviewSvg = async (page: Page): Promise => { const waitForHooksDiag = async (page: Page): Promise => { await page.waitForFunction(() => { const d = document.querySelector("#hooks-diag"); - return d !== null && !d.hidden && d.textContent.length > 0; + return d !== null && d.hidden === false && d.textContent.length > 0; }); }; From 284b3f8460917f540aca11a05f085bdd0d6ba5d6 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Fri, 10 Jul 2026 03:16:32 +1000 Subject: [PATCH 14/16] Fix Claude settings formatting --- .claude/settings.local.json | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.claude/settings.local.json b/.claude/settings.local.json index 465b714..4fc251d 100644 --- a/.claude/settings.local.json +++ b/.claude/settings.local.json @@ -6,4 +6,4 @@ ] }, "autoMemoryEnabled": false -} \ No newline at end of file +} From ac4d8b57ca9f43de319d10f63d4073bb36727c35 Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Fri, 10 Jul 2026 03:56:50 +1000 Subject: [PATCH 15/16] Fix workflow CodeQL checkout alerts --- .github/dependabot.yml | 9 ++-- .github/workflows/ci.yml | 6 +-- .github/workflows/codeql.yml | 5 +- .github/workflows/dependabot-automerge.yml | 63 +++++----------------- .github/workflows/deploy-pages.yml | 21 +++----- .github/workflows/release.yml | 4 +- docs/plans/marketplace-oidc-and-0.11.0.md | 4 +- 7 files changed, 33 insertions(+), 79 deletions(-) diff --git a/.github/dependabot.yml b/.github/dependabot.yml index 998e108..6919307 100644 --- a/.github/dependabot.yml +++ b/.github/dependabot.yml @@ -6,16 +6,17 @@ # against staging; ci.yml / codeql.yml only trigger on `pull_request: [main]` # (matched on the PR *base*), so staging PRs run NO build/test/CodeQL. # * SECURITY updates -> GitHub IGNORES `target-branch` and always opens them -# against `main`; .github/workflows/dependabot-automerge.yml catches them there -# and folds them into the SAME staging branch, then retires the PR. +# against `main`; they must be manually staged into the same consolidation +# branch, because privileged auto-merging of PR heads is an unsafe workflow +# pattern. # * groups -> each ecosystem collapses ALL bump types (patch+minor+major) # into ONE PR; a parallel `*-security` group does the same for CVE bumps. # # The whole batch reaches main via ONE `dependabot-upgrades -> main` consolidation # PR, where CI + CodeQL run exactly once. # -# REQUIREMENT: the `dependabot-upgrades` branch must exist and stay UNPROTECTED, -# cut from main AFTER this file + dependabot-automerge.yml are on main. +# REQUIREMENT: the `dependabot-upgrades` branch must exist, cut from main AFTER +# this file is on main. version: 2 updates: diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 41a29a8..1b7a8be 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -21,9 +21,9 @@ defaults: jobs: ci: name: CI - # Dependabot PRs are swept into `dependabot-upgrades` by dependabot-automerge.yml - # and never merge to main directly, so CI would only burn minutes on a bump we - # discard. CI runs once, on the `dependabot-upgrades -> main` consolidation PR. + # Dependabot version PRs target `dependabot-upgrades`; security PRs that + # GitHub forces to main must be manually staged there. CI runs once, on the + # `dependabot-upgrades -> main` consolidation PR. # ([GITHUB-DEPENDABOT]) if: github.actor != 'dependabot[bot]' runs-on: ubuntu-latest diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml index dcf2961..1913cde 100644 --- a/.github/workflows/codeql.yml +++ b/.github/workflows/codeql.yml @@ -52,9 +52,8 @@ jobs: # Code scanning (SARIF upload) requires GitHub Advanced Security on PRIVATE # repos. Gating on public visibility lets a private repo skip cleanly (no red # X) and self-enable the moment it is made public — no follow-up edit needed. - # Dependabot PRs are excluded: they are swept into `dependabot-upgrades` by - # dependabot-automerge.yml and never merge to main directly, so scanning them - # only burns the matrix on a bump we discard — CodeQL runs on the + # Dependabot version PRs target `dependabot-upgrades`; security PRs that + # GitHub forces to main must be manually staged there. CodeQL runs on the # consolidation PR instead. ([GITHUB-DEPENDABOT]) if: github.event.repository.visibility == 'public' && github.actor != 'dependabot[bot]' permissions: diff --git a/.github/workflows/dependabot-automerge.yml b/.github/workflows/dependabot-automerge.yml index ae7a2ec..efb6ae0 100644 --- a/.github/workflows/dependabot-automerge.yml +++ b/.github/workflows/dependabot-automerge.yml @@ -1,23 +1,18 @@ # agent-pmo:372ce7f name: Dependabot auto-merge -# Sweeps EVERY Dependabot PR into the long-lived `dependabot-upgrades` staging -# branch, no questions asked ([GITHUB-DEPENDABOT]). Two kinds of PR land here: +# Records Dependabot PRs for the long-lived `dependabot-upgrades` staging branch +# ([GITHUB-DEPENDABOT]). Two kinds of PR land here: # # * VERSION updates -> Dependabot opens them against `dependabot-upgrades` # directly (.github/dependabot.yml `target-branch`). # * SECURITY updates -> GitHub IGNORES `target-branch` for these and ALWAYS -# opens them against the default branch (`main`). So this workflow also -# triggers on `main` and folds the security bump into the SAME staging -# branch — nothing is ever left sitting on `main` waiting for a human. +# opens them against the default branch (`main`). # -# Merge strategy: the incoming branch ALWAYS clobbers what is already staged -# (`git merge -X theirs`). Successive bumps of the same lock-file never conflict- -# stall: the latest bump wins, every time. Nothing reaches `main` this way — the -# full build/test (ci.yml) + CodeQL (codeql.yml) gate the single -# `dependabot-upgrades -> main` consolidation PR, which is where review and the -# expensive matrix actually run. ci.yml/codeql.yml deliberately SKIP Dependabot -# PRs (they would only burn the matrix on a bump we immediately sweep away). +# This workflow intentionally does not checkout or merge PR head refs with write +# permissions. That pattern trips CodeQL's untrusted-checkout rule and is unsafe +# for privileged automation. The consolidation PR into `main` is still where the +# full build/test (ci.yml) + CodeQL (codeql.yml) gate runs. # # Lives at the repo root so it is present on `dependabot-upgrades` (cut from # main): for `pull_request` the workflow is read from the PR's base branch, so @@ -29,55 +24,21 @@ on: - main permissions: - contents: write - pull-requests: write + contents: read + pull-requests: read jobs: sweep: - name: Clobber-merge into dependabot-upgrades + name: Record Dependabot PR if: github.actor == 'dependabot[bot]' # Deliberately the standard runner, NOT a larger/paid one: a trivial merge # bot must not consume CI minutes meant for the real build matrix. runs-on: ubuntu-latest timeout-minutes: 5 steps: - - name: Check out the staging branch - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3 - with: - ref: dependabot-upgrades - fetch-depth: 0 - - - name: Clobber-merge the bump and retire the PR + - name: Record Dependabot PR for manual staging env: PR_URL: ${{ github.event.pull_request.html_url }} - PR_HEAD: ${{ github.event.pull_request.head.ref }} - GH_TOKEN: ${{ secrets.GITHUB_TOKEN }} run: | set -euo pipefail - git config user.name "github-actions[bot]" - git config user.email "41898282+github-actions[bot]@users.noreply.github.com" - # Pull the bump branch into a stable local ref we can re-merge. - git fetch origin "+refs/heads/${PR_HEAD}:refs/remotes/origin/${PR_HEAD}" - # Re-merge onto the LIVE staging tip and retry: concurrent Dependabot - # PRs race to push here, so each run rebases on whatever already landed - # and the incoming branch always wins conflicts (-X theirs). - for attempt in 1 2 3 4 5; do - git fetch origin "+refs/heads/dependabot-upgrades:refs/remotes/origin/dependabot-upgrades" - git reset --hard "origin/dependabot-upgrades" - git merge -X theirs --no-edit "origin/${PR_HEAD}" \ - -m "build(deps): clobber-merge ${PR_HEAD} into dependabot-upgrades" - if git push origin "HEAD:dependabot-upgrades"; then - break - fi - if [ "$attempt" = "5" ]; then - echo "::error::could not push to dependabot-upgrades after 5 attempts" - exit 1 - fi - sleep 5 - done - # Retire the PR + its branch: the bump is already staged, so the PR - # (whether it targeted main or the staging branch) has served its - # purpose. `|| true` — GitHub may have auto-closed it on the push. - gh pr close "$PR_URL" --delete-branch \ - --comment "Swept into \`dependabot-upgrades\` (latest bump clobbers previous)." \ - || git push origin --delete "$PR_HEAD" || true + echo "::notice::Dependabot PR requires staging into dependabot-upgrades: ${PR_URL}" diff --git a/.github/workflows/deploy-pages.yml b/.github/workflows/deploy-pages.yml index e6e6ccc..6d38c8f 100644 --- a/.github/workflows/deploy-pages.yml +++ b/.github/workflows/deploy-pages.yml @@ -2,12 +2,10 @@ name: Deploy to GitHub Pages on: - # Deploys automatically after a successful Release run, and can also be - # triggered manually. Never on push to main (website must not get ahead - # of the actual release). See REPO-STANDARDS-SPEC [CI-WORKFLOWS]. - workflow_run: - workflows: ["Release"] - types: [completed] + # Manual only. This job has Pages write privileges, so it must not checkout a + # ref derived from a workflow_run payload. Trigger after a green Release when + # publishing the website for that release. See REPO-STANDARDS-SPEC + # [CI-WORKFLOWS]. workflow_dispatch: permissions: @@ -21,19 +19,14 @@ concurrency: jobs: build: - # Only run on successful Release, or when triggered manually. - if: github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' runs-on: ubuntu-latest timeout-minutes: 10 steps: - # [SWR-REL-WORKFLOW] Deploy the website at the RELEASE ref, not main. A - # workflow_run event checks out the default branch by default, which would - # publish whatever landed on main after the tag; head_sha is the exact commit - # the Release run built (the tagged SHA). On workflow_dispatch head_sha is - # empty, so checkout falls back to the dispatched ref. + # [SWR-REL-WORKFLOW] workflow_dispatch checks out the operator-selected + # trusted ref. Do not reintroduce workflow_run + head_sha checkout here: + # Pages deployment has write privileges. - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0 with: - ref: ${{ github.event.workflow_run.head_sha }} persist-credentials: false - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0 diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 8146de8..700460d 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -3,8 +3,8 @@ name: Release # [SWR-REL-WORKFLOW] Tag-triggered only. Builds the EXACT tagged SHA; the version is # stamped in the runner working tree by scripts/stamp-version.mjs and never committed -# or pushed back ([SWR-VERSION-BUILD-STAMPING]). The website deploys automatically via -# deploy-pages.yml's workflow_run trigger when this workflow completes. +# or pushed back ([SWR-VERSION-BUILD-STAMPING]). Deploy the website manually via +# deploy-pages.yml after a green Release. on: push: tags: diff --git a/docs/plans/marketplace-oidc-and-0.11.0.md b/docs/plans/marketplace-oidc-and-0.11.0.md index 2c22a2d..f8ff12f 100644 --- a/docs/plans/marketplace-oidc-and-0.11.0.md +++ b/docs/plans/marketplace-oidc-and-0.11.0.md @@ -48,8 +48,8 @@ Key facts from the runbooks: (non-sensitive directory identifiers, from inventory). - [x] Confirm publisher membership already covers `nimblesite.*` (shared app) — the extension's publisher is `nimblesite`, covered by the shared Contributor member. -- [x] github-pages env: deploy-pages runs on `workflow_run` from `main`, not a tag, so - the Part E tag-policy gotcha does not apply. +- [x] github-pages env: deploy-pages runs via `workflow_dispatch` on an operator-selected + trusted ref, so privileged Pages deployment never checks out a `workflow_run` SHA. ### B. Rewrite `release.yml` marketplace publish From be57af4eb00608b948b922322cf1a91cd7773cda Mon Sep 17 00:00:00 2001 From: Christian Findlay <16697547+MelbourneDeveloper@users.noreply.github.com> Date: Fri, 10 Jul 2026 04:13:24 +1000 Subject: [PATCH 16/16] Fix Deslop invocation in CI --- .github/workflows/ci.yml | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 1b7a8be..72070d0 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -117,8 +117,7 @@ jobs: DESLOP_VERSION: "0.5.1" # pin — https://github.com/Nimblesite/Deslop/releases run: | curl -sSfL "https://github.com/Nimblesite/Deslop/releases/download/v${DESLOP_VERSION}/deslop-${DESLOP_VERSION}-linux-x64.tar.gz" | tar -xz - echo "$PWD/deslop-${DESLOP_VERSION}-linux-x64" >> "$GITHUB_PATH" - deslop . + "./deslop-${DESLOP_VERSION}-linux-x64/deslop" . # [SWR-GATE-CI] [SWR-GATE-VERIFY-BINARIES] manifest + CLI version contract. - name: Shipwright acceptance gates