diff --git a/CLAUDE.md b/CLAUDE.md
index e4b09b6..210a9f9 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -161,6 +161,13 @@ hemlock --version
 - [ ] Wire up monaco-languageclient
 - [ ] Verify diagnostics, hover, completion
 
+### Phase 3.5: Browser Execution (WASM) ✓ (Complete)
+- [x] Toolbar **☁ Server / ⬡ Browser** execution-mode toggle (persisted in localStorage)
+- [x] Load the Hemlock interpreter compiled to WebAssembly (`wasm/hemlock.js` + `wasm/hemlock.wasm`)
+- [x] Run code client-side via `Hemlock.init()` + `hemlock.eval()` with captured stdout/stderr
+- [x] `build-wasm.sh` to (re)generate artifacts from `hemlang/hemlock` (`make wasm-interpreter`)
+- [x] Graceful fallback message when artifacts are missing; `?wasm=URL` override for CDN hosting
+
 ### Phase 4: Polish
 - [ ] Example snippets dropdown improvements
 - [ ] UI/UX improvements
diff --git a/README.md b/README.md
index a11ccd7..66f6647 100644
--- a/README.md
+++ b/README.md
@@ -15,9 +15,39 @@ hemlock grove.hml
 
 - **Code Editor** - Syntax-highlighted textarea with tab support
 - **Code Execution** - Run Hemlock code in a sandboxed environment
+- **Two execution modes** - Run on the Grove **server**, or fully in your
+  **browser** via the Hemlock interpreter compiled to WebAssembly (no server,
+  no network round-trip)
 - **Example Programs** - Pre-built examples (Hello World, Fibonacci, FizzBuzz, Async, JSON)
 - **Real-time Feedback** - Execution time, exit codes, and error messages
 
+## Execution Modes
+
+The toolbar has a **☁ Server / ⬡ Browser** toggle:
+
+- **☁ Server** (default) — code is sent to the Grove server's `POST /execute`
+  endpoint and run with `hemlock --sandbox`. Supports stdin, `✓ Check`, and
+  `{ } Format` (all server-backed).
+- **⬡ Browser** — code runs entirely client-side in the Hemlock WebAssembly
+  interpreter. No server is required, so `Check`/`Format`/stdin (which rely on
+  the server) are disabled in this mode. The chosen mode is remembered across
+  reloads.
+
+Browser mode needs two build artifacts, `wasm/hemlock.js` and
+`wasm/hemlock.wasm`. They are produced from the [hemlang/hemlock](https://github.com/hemlang/hemlock)
+source tree. Regenerate them with:
+
+```bash
+./build-wasm.sh
+```
+
+This requires the [Emscripten SDK](https://emscripten.org/docs/getting_started/downloads.html)
+(`emcc` on your `PATH`); it clones hemlock if needed, runs
+`make wasm-interpreter`, and copies the artifacts into `wasm/`. To load the
+WASM from a different location (e.g. a CDN), open the playground with
+`?wasm=https://example.com/path/` — the playground will fetch
+`hemlock.js`/`hemlock.wasm` from there.
+
 ## Architecture
 
 ```
@@ -117,7 +147,13 @@ hemlock test/test_examples.hml
 ```
 playground/
 ├── grove.hml           # Backend HTTP server
-├── playground.html     # Frontend IDE
+├── playground.html     # Frontend IDE (server + browser/WASM modes)
+├── build-wasm.sh       # Builds the WASM interpreter artifacts
+├── wasm/               # Browser execution mode
+│   ├── hemlock-api.js  #   JS wrapper around the WASM interpreter (committed)
+│   ├── pre.js          #   Emscripten pre-init shim (committed)
+│   ├── hemlock.js      #   Emscripten loader (generated by build-wasm.sh)
+│   └── hemlock.wasm    #   Compiled interpreter (generated by build-wasm.sh)
 ├── examples/           # Example programs
 │   ├── hello.hml
 │   ├── fibonacci.hml
diff --git a/build-wasm.sh b/build-wasm.sh
new file mode 100755
index 0000000..e57c078
--- /dev/null
+++ b/build-wasm.sh
@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+#
+# build-wasm.sh — build the Hemlock WASM interpreter for browser execution.
+#
+# The playground's "Browser" execution mode runs the Hemlock interpreter
+# entirely client-side via WebAssembly. That needs two build artifacts:
+#
+#   wasm/hemlock.js     Emscripten JS loader glue
+#   wasm/hemlock.wasm   the interpreter compiled to WebAssembly
+#
+# These are generated from the hemlang/hemlock source tree (target
+# `make wasm-interpreter`) and copied here. The small JS wrapper
+# (wasm/hemlock-api.js) and pre-init shim (wasm/pre.js) are committed to
+# this repo; the .js/.wasm artifacts are regenerated by this script.
+#
+# Requirements:
+#   - Emscripten SDK on PATH (emcc). See https://emscripten.org/docs/getting_started/downloads.html
+#   - A checkout of hemlang/hemlock (cloned automatically if missing)
+#
+# Usage:
+#   ./build-wasm.sh                 # clone/build hemlock, copy artifacts
+#   HEMLOCK_DIR=/path/to/hemlock ./build-wasm.sh   # use an existing checkout
+#
+set -euo pipefail
+
+PLAYGROUND_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+HEMLOCK_DIR="${HEMLOCK_DIR:-$PLAYGROUND_DIR/../hemlock}"
+HEMLOCK_REPO="${HEMLOCK_REPO:-https://github.com/hemlang/hemlock.git}"
+
+echo "==> Hemlock WASM build"
+echo "    playground: $PLAYGROUND_DIR"
+echo "    hemlock:    $HEMLOCK_DIR"
+
+if ! command -v emcc >/dev/null 2>&1; then
+    echo "ERROR: emcc (Emscripten) not found on PATH." >&2
+    echo "       Install the Emscripten SDK and 'source emsdk_env.sh', then retry." >&2
+    echo "       https://emscripten.org/docs/getting_started/downloads.html" >&2
+    exit 1
+fi
+
+if [ ! -d "$HEMLOCK_DIR" ]; then
+    echo "==> Cloning hemlock into $HEMLOCK_DIR"
+    git clone --depth 1 "$HEMLOCK_REPO" "$HEMLOCK_DIR"
+fi
+
+echo "==> Building wasm-interpreter (this can take a few minutes)"
+make -C "$HEMLOCK_DIR" wasm-interpreter
+
+echo "==> Copying artifacts into $PLAYGROUND_DIR/wasm/"
+mkdir -p "$PLAYGROUND_DIR/wasm"
+cp "$HEMLOCK_DIR/wasm/hemlock.js"      "$PLAYGROUND_DIR/wasm/hemlock.js"
+cp "$HEMLOCK_DIR/wasm/hemlock.wasm"    "$PLAYGROUND_DIR/wasm/hemlock.wasm"
+# Refresh the wrapper too, in case the upstream API changed.
+cp "$HEMLOCK_DIR/wasm/hemlock-api.js"  "$PLAYGROUND_DIR/wasm/hemlock-api.js"
+cp "$HEMLOCK_DIR/wasm/pre.js"          "$PLAYGROUND_DIR/wasm/pre.js"
+
+echo "==> Done. Artifacts:"
+ls -lh "$PLAYGROUND_DIR/wasm/"
+echo
+echo "Open playground.html and switch the toolbar toggle to 'Browser' to run"
+echo "Hemlock entirely in the browser (no Grove server required)."
diff --git a/grove.hml b/grove.hml
index c056b8e..c77853a 100644
--- a/grove.hml
+++ b/grove.hml
@@ -11,7 +11,7 @@
 import { TcpListener } from "@stdlib/net";
 import { stringify, parse } from "@stdlib/json";
 import { time_ms } from "@stdlib/time";
-import { write_file, exists, remove_file, read_file, cwd } from "@stdlib/fs";
+import { write_file, exists, remove_file, read_file, cwd, open, file_stat } from "@stdlib/fs";
 import { run_capture } from "@stdlib/shell";
 import { getenv } from "@stdlib/env";
 
@@ -917,6 +917,72 @@ fn handle_not_found(path) {
     });
 }
 
+// Content type for a static asset, keyed off its file extension.
+fn static_content_type(rel) {
+    if (rel.length >= 5 && rel.substr(rel.length - 5, 5) == ".wasm") {
+        return "application/wasm";
+    }
+    if (rel.length >= 3 && rel.substr(rel.length - 3, 3) == ".js") {
+        return "text/javascript; charset=utf-8";
+    }
+    if (rel.length >= 5 && rel.substr(rel.length - 5, 5) == ".html") {
+        return "text/html; charset=utf-8";
+    }
+    if (rel.length >= 5 && rel.substr(rel.length - 5, 5) == ".json") {
+        return "application/json";
+    }
+    return "application/octet-stream";
+}
+
+// Build just the HTTP response headers (no body). Used for binary static
+// assets, where the body is a byte buffer written to the socket separately
+// so it never passes through string concatenation (which would corrupt it).
+fn build_headers(status, status_text, content_type, content_length) {
+    let h = `HTTP/1.1 ${status} ${status_text}\r\n`;
+    h = h + `Content-Type: ${content_type}\r\n`;
+    h = h + `Content-Length: ${content_length}\r\n`;
+    h = h + `Access-Control-Allow-Origin: ${CONFIG["cors_origin"]}\r\n`;
+    h = h + "Cache-Control: public, max-age=3600\r\n";
+    h = h + "Connection: close\r\n";
+    h = h + "\r\n";
+    return h;
+}
+
+// Serve a file from the playground's wasm/ directory (browser execution mode).
+// Writes directly to the socket so the binary hemlock.wasm is sent byte-for-byte.
+// Returns true if it handled the request.
+fn handle_static(stream, url_path) {
+    // Only ever serve files under wasm/, and never allow path traversal.
+    if (url_path.find("..") != -1) {
+        stream.write(json_response(403, { error: "Forbidden", path: url_path }));
+        return true;
+    }
+    // Strip the leading "/" to get a path relative to the playground root.
+    let rel = url_path.substr(1, url_path.length - 1);
+    if (rel.length < 5 || rel.substr(0, 5) != "wasm/") {
+        return false;  // not a static asset route; let the caller 404
+    }
+
+    let full = `${cwd()}/${rel}`;
+    if (!exists(full)) {
+        stream.write(json_response(404, { error: "Not found", path: url_path }));
+        return true;
+    }
+
+    let info = file_stat(full);
+    let size = info["size"];
+    let ctype = static_content_type(rel);
+
+    // Read the file as bytes and stream headers + body separately.
+    let f = open(full, "r");
+    let body = f.read_bytes(size);
+    f.close();
+
+    stream.write(build_headers(200, "OK", ctype, size));
+    stream.write(body);
+    return true;
+}
+
 // =============================================================================
 // Connection Handler
 // =============================================================================
@@ -1047,6 +1113,7 @@ fn handle_connection(stream) {
         // Route request
         let response = "";
         let method = req["method"];
+        let handled = false;  // set when a handler writes to the stream itself
 
         if (method == "OPTIONS") {
             response = handle_options();
@@ -1062,12 +1129,21 @@ fn handle_connection(stream) {
             response = handle_check(req["body"]);
         } else if (path == "/format" && method == "POST") {
             response = handle_format(req["body"]);
+        } else if (path.length >= 6 && path.substr(0, 6) == "/wasm/" && method == "GET") {
+            // Static assets for browser (WASM) execution mode. handle_static
+            // streams the response (including the binary .wasm) directly.
+            handled = handle_static(stream, path);
+            if (!handled) {
+                response = handle_not_found(path);
+            }
         } else {
             response = handle_not_found(path);
         }
 
-        // Send response
-        stream.write(response);
+        // Send response (unless the handler already wrote to the stream)
+        if (!handled) {
+            stream.write(response);
+        }
         stream.close();
 
     } catch (e) {
diff --git a/playground.html b/playground.html
index 9bedc07..4671634 100644
--- a/playground.html
+++ b/playground.html
@@ -108,6 +108,36 @@
             cursor: not-allowed;
         }
 
+        /* Execution-mode toggle (Server vs Browser/WASM) */
+        .mode-toggle {
+            display: inline-flex;
+            border: 1px solid var(--border);
+            border-radius: 6px;
+            overflow: hidden;
+        }
+
+        .mode-toggle button {
+            border: none;
+            border-radius: 0;
+            background: var(--bg-lighter);
+            padding: 8px 12px;
+            font-size: 0.8rem;
+            gap: 4px;
+        }
+
+        .mode-toggle button + button {
+            border-left: 1px solid var(--border);
+        }
+
+        .mode-toggle button.active {
+            background: var(--accent);
+            color: var(--bg-dark);
+        }
+
+        .mode-toggle button.active:hover {
+            background: #8fb0fa;
+        }
+
         .main-container {
             flex: 1;
             display: flex;
@@ -438,6 +468,10 @@
                     <button data-example="input">User Input (stdin)</button>
                 </div>
             </div>
+            <div class="mode-toggle" id="mode-toggle" role="group" aria-label="Execution mode">
+                <button data-mode="server" class="active" title="Run on the Grove server">☁ Server</button>
+                <button data-mode="wasm" title="Run in your browser via WebAssembly (no server)">⬡ Browser</button>
+            </div>
             <button id="format-btn">{ } Format</button>
             <button id="check-btn">✓ Check</button>
             <button id="run-btn" class="primary">▶ Run</button>
@@ -876,10 +910,91 @@
         const stdinInput = document.getElementById('stdin-input');
         const inputSection = document.getElementById('input-section');
         const inputHeader = document.getElementById('input-header');
+        const modeToggle = document.getElementById('mode-toggle');
 
         // State
         let isRunning = false;
 
+        // ====================================================================
+        // Execution mode: 'server' (Grove HTTP API) or 'wasm' (in-browser)
+        // ====================================================================
+        // Where to load the compiled interpreter from. Override with ?wasm=URL
+        // (e.g. a CDN) if you don't want to serve the artifacts locally.
+        const WASM_BASE = (new URLSearchParams(location.search).get('wasm') || 'wasm/').replace(/\/?$/, '/');
+
+        let executionMode = localStorage.getItem('hemlock-exec-mode') || 'server';
+
+        // Lazy-initialized WASM interpreter handle. Stays null until the user
+        // first switches to (or runs in) browser mode.
+        const wasm = {
+            loading: null,   // Promise while the module is being fetched/initialized
+            hemlock: null,   // Hemlock API instance once ready
+            out: [],         // Captured stdout/stderr lines for the current run
+        };
+
+        // Inject a <script> once and resolve when it has executed. A second
+        // call for the same src is a no-op: re-running the Emscripten glue
+        // (hemlock.js) would redeclare its globals and corrupt the runtime.
+        function loadScript(src) {
+            return new Promise((resolve, reject) => {
+                if (document.querySelector(`script[data-hml-src="${src}"]`)) {
+                    resolve();
+                    return;
+                }
+                const el = document.createElement('script');
+                el.src = src;
+                el.dataset.hmlSrc = src;
+                el.onload = () => resolve();
+                el.onerror = () => reject(new Error(`Failed to load ${src}`));
+                document.head.appendChild(el);
+            });
+        }
+
+        // Load + initialize the Hemlock WASM interpreter exactly once.
+        function initWasm() {
+            if (wasm.hemlock) return Promise.resolve(wasm.hemlock);
+            if (wasm.loading) return wasm.loading;
+
+            wasm.loading = new Promise((resolve, reject) => {
+                // Configure the Emscripten Module before hemlock.js runs.
+                // print/printErr funnel interpreter output into wasm.out so the
+                // active run can render it the same way as server output.
+                window.Module = {
+                    // playground.html lives at the repo root while the artifacts
+                    // live in wasm/, so tell Emscripten where to find hemlock.wasm
+                    // instead of letting it guess (it would 404 at the root).
+                    locateFile: (path) => WASM_BASE + path,
+                    print: (text) => wasm.out.push({ text, err: false }),
+                    printErr: (text) => {
+                        // Drop Emscripten's own startup chatter.
+                        if (/pre-main|\brun\(\)/.test(text)) return;
+                        wasm.out.push({ text, err: true });
+                    },
+                    noInitialRun: true,
+                    onAbort: (what) => reject(new Error('WASM aborted: ' + what)),
+                    // Only initialize the JS API once the wasm exports are live;
+                    // calling it any earlier reads an undefined export table.
+                    onRuntimeInitialized: function() {
+                        Hemlock.init({ Module: window.Module })
+                            .then((h) => { wasm.hemlock = h; resolve(h); })
+                            .catch(reject);
+                    },
+                };
+
+                // hemlock-api.js must be present before onRuntimeInitialized fires.
+                loadScript(WASM_BASE + 'hemlock-api.js')
+                    .then(() => loadScript(WASM_BASE + 'hemlock.js'))
+                    .catch(reject);
+            }).catch((e) => {
+                // Surface the failure but keep hemlock.js out of a re-run loop:
+                // loadScript is idempotent, so a retry won't re-execute the glue.
+                wasm.loading = null;
+                throw e;
+            });
+
+            return wasm.loading;
+        }
+
         // Syntax highlighting
         function updateHighlight() {
             // Add trailing newline to prevent scrolling issues
@@ -932,6 +1047,10 @@
                 return;
             }
 
+            if (executionMode === 'wasm') {
+                return runCodeWasm(code);
+            }
+
             isRunning = true;
             runBtn.disabled = true;
             checkBtn.disabled = true;
@@ -996,6 +1115,105 @@
             }
         }
 
+        // Run code in the browser via the WASM interpreter (no server).
+        async function runCodeWasm(code) {
+            isRunning = true;
+            runBtn.disabled = true;
+            setStatus('Loading WASM...', false, true);
+            output.innerHTML = '<span class="output-info">Loading interpreter...</span>';
+
+            let hemlock;
+            try {
+                hemlock = await initWasm();
+            } catch (e) {
+                output.innerHTML =
+                    `<span class="output-error">Could not load the WASM interpreter: ${escapeHtml(e.message)}</span>\n` +
+                    `<span class="output-info">Expected the build artifacts at <code>${escapeHtml(WASM_BASE)}hemlock.js</code> and <code>${escapeHtml(WASM_BASE)}hemlock.wasm</code>. ` +
+                    `Run <code>./build-wasm.sh</code> to generate them, or switch back to Server mode.</span>`;
+                setStatus('WASM unavailable', true);
+                isRunning = false;
+                runBtn.disabled = false;
+                return;
+            }
+
+            setStatus('Running...', false, true);
+            output.innerHTML = '<span class="output-info">Executing...</span>';
+
+            // Run on a tick so the status repaints before a long eval blocks the UI.
+            await new Promise((r) => setTimeout(r, 10));
+
+            wasm.out = [];
+            const start = performance.now();
+            let threw = null;
+            try {
+                hemlock.eval(code);
+            } catch (e) {
+                threw = e;
+            }
+            const elapsed = Math.round(performance.now() - start);
+
+            const stdout = wasm.out.filter((l) => !l.err).map((l) => l.text).join('\n');
+            const stderr = wasm.out.filter((l) => l.err).map((l) => l.text).join('\n');
+            const success = !threw && !stderr;
+
+            let html = '';
+            if (stdout) html += `<span class="output-stdout">${escapeHtml(stdout)}</span>`;
+            if (stderr) {
+                if (html) html += '\n';
+                html += `<span class="output-stderr">${escapeHtml(stderr)}</span>`;
+            }
+            if (threw) {
+                if (html) html += '\n';
+                html += `<span class="output-error">${escapeHtml(threw.message)}</span>`;
+            }
+            if (!html) html = '<span class="output-info">(no output)</span>';
+
+            html += '\n\n';
+            const statusClass = success ? 'output-success' : 'output-error';
+            const statusIcon = success ? '✓' : '✗';
+            html += `<span class="${statusClass}">${statusIcon} ${success ? 'Done' : 'Finished with errors'}</span>`;
+            html += `<span class="output-info"> | ${elapsed}ms | in-browser (WASM)</span>`;
+
+            output.innerHTML = html;
+            setStatus(success ? 'Success' : 'Error', !success);
+            isRunning = false;
+            runBtn.disabled = false;
+        }
+
+        // Switch between server and browser (WASM) execution.
+        function setExecutionMode(mode) {
+            executionMode = mode;
+            localStorage.setItem('hemlock-exec-mode', mode);
+
+            modeToggle.querySelectorAll('button').forEach((b) => {
+                b.classList.toggle('active', b.dataset.mode === mode);
+            });
+
+            const browser = mode === 'wasm';
+            // Check/Format require the Grove server; disable them offline.
+            checkBtn.disabled = browser;
+            formatBtn.disabled = browser;
+            const serverOnlyTitle = browser ? 'Requires Server mode' : '';
+            checkBtn.title = serverOnlyTitle;
+            formatBtn.title = serverOnlyTitle;
+            // Stdin is only wired through the server's /execute endpoint.
+            stdinInput.disabled = browser;
+
+            if (browser) {
+                versionInfo.textContent = wasm.hemlock
+                    ? `Hemlock ${wasm.hemlock.version} (WASM)`
+                    : 'Hemlock (WASM) — runs in your browser';
+                // Warm up the module in the background for a snappier first run.
+                initWasm().then(() => {
+                    if (executionMode === 'wasm') {
+                        versionInfo.textContent = `Hemlock ${wasm.hemlock.version} (WASM)`;
+                    }
+                }).catch(() => { /* surfaced on first Run */ });
+            } else {
+                fetchVersion();
+            }
+        }
+
         // Check syntax
         async function checkSyntax() {
             if (isRunning) return;
@@ -1284,8 +1502,13 @@
             inputSection.classList.toggle('collapsed');
         });
 
+        // Execution-mode toggle
+        modeToggle.querySelectorAll('button').forEach((btn) => {
+            btn.addEventListener('click', () => setExecutionMode(btn.dataset.mode));
+        });
+
         // Initialize
-        fetchVersion();
+        setExecutionMode(executionMode);
         updateHighlight();
     </script>
 </body>
diff --git a/wasm/README.md b/wasm/README.md
new file mode 100644
index 0000000..d36dbef
--- /dev/null
+++ b/wasm/README.md
@@ -0,0 +1,46 @@
+# Browser execution mode (Hemlock WASM)
+
+This directory holds the assets that let `playground.html` run Hemlock code
+entirely in the browser, with no Grove server. When the toolbar toggle is set
+to **⬡ Browser**, the playground loads these files and executes code through the
+Hemlock interpreter compiled to WebAssembly.
+
+## Files
+
+| File | Source | Committed? |
+|------|--------|------------|
+| `hemlock-api.js` | A clean JS wrapper around the WASM interpreter (`Hemlock.init`, `.eval`, contexts). Vendored from `hemlang/hemlock`. | ✅ yes |
+| `pre.js` | Emscripten pre-init shim (sets up the `Module` global). Vendored from `hemlang/hemlock`. | ✅ yes |
+| `hemlock.js` | Emscripten loader glue. **Generated** by `make wasm-interpreter`. | ✅ committed for convenience |
+| `hemlock.wasm` | The interpreter compiled to WebAssembly (~3 MB). **Generated**. | ✅ committed for convenience |
+
+## Regenerating the artifacts
+
+From the playground root:
+
+```bash
+./build-wasm.sh
+```
+
+This needs the [Emscripten SDK](https://emscripten.org/docs/getting_started/downloads.html)
+(`emcc` on `PATH`). It will clone `hemlang/hemlock` if it isn't already next to
+this repo, run `make wasm-interpreter`, and copy the four files above into here.
+
+## How the playground uses these
+
+`playground.html` configures an Emscripten `Module` with:
+
+- `locateFile` pointing back at this directory (the HTML lives one level up, so
+  Emscripten would otherwise look for `hemlock.wasm` at the site root),
+- `print` / `printErr` handlers that capture interpreter output, and
+- initialization deferred to `onRuntimeInitialized` so the JS API only binds
+  once the wasm exports are live.
+
+It then calls `Hemlock.init({ Module })` and runs source via `hemlock.eval(...)`.
+
+## Limitations in the browser
+
+The WASM interpreter is single-threaded and sandboxed by the browser, so some
+features are unavailable: FFI, OpenSSL crypto, `fork`/`exec`, and threading
+(`spawn`/channels). `Check` and `Format` in the playground are server-backed and
+are disabled in browser mode.
diff --git a/wasm/hemlock-api.js b/wasm/hemlock-api.js
new file mode 100644
index 0000000..eb33b5b
--- /dev/null
+++ b/wasm/hemlock-api.js
@@ -0,0 +1,466 @@
+/**
+ * Hemlock WASM JavaScript API
+ *
+ * A clean JavaScript wrapper around the Hemlock WebAssembly interpreter.
+ * Works in both browser and Node.js environments.
+ *
+ * Usage (browser):
+ *   <script src="hemlock.js"></script>
+ *   <script src="hemlock-api.js"></script>
+ *   <script>
+ *     Hemlock.init().then(function(hemlock) {
+ *       hemlock.eval('print("hello");');
+ *     });
+ *   </script>
+ *
+ * Usage (Node.js):
+ *   const { Hemlock } = require('./hemlock-api.js');
+ *   Hemlock.init('./hemlock.js').then(function(hemlock) {
+ *     hemlock.eval('print("hello");');
+ *   });
+ *
+ * Three API layers:
+ *   1. hemlock.eval(source)       - Stateless one-shot execution
+ *   2. hemlock.createContext()     - Persistent context (variables survive across evals)
+ *   3. hemlock.compile(source)    - Cached script (parse once, run many)
+ */
+
+(function(root) {
+    'use strict';
+
+    /* ====================================================================
+     * HemlockContext - Persistent interpreter context
+     * ==================================================================== */
+
+    /**
+     * A persistent Hemlock interpreter context.
+     * Variables and functions defined in one eval() call are visible in later calls.
+     *
+     * Do not construct directly - use hemlock.createContext().
+     *
+     * @param {number} handle - Internal context handle
+     * @param {object} fns - Wrapped C functions
+     */
+    function HemlockContext(handle, fns) {
+        this._handle = handle;
+        this._fns = fns;
+        this._destroyed = false;
+    }
+
+    /**
+     * Execute Hemlock source code in this context.
+     * Variables defined here persist for future eval() calls.
+     *
+     * @param {string} source - Hemlock source code
+     * @returns {{ ok: boolean, error: string|null }}
+     *   ok=true on success, ok=false with error message on failure
+     */
+    HemlockContext.prototype.eval = function(source) {
+        if (this._destroyed) {
+            return { ok: false, error: 'Context has been destroyed' };
+        }
+        var rc = this._fns.ctxEval(this._handle, source);
+        if (rc === 0) {
+            return { ok: true, error: null };
+        }
+        var msg = this._fns.ctxLastError(this._handle);
+        if (rc === 1) {
+            return { ok: false, error: msg || 'Parse error' };
+        }
+        if (rc === 2) {
+            return { ok: false, error: msg || 'Runtime error' };
+        }
+        return { ok: false, error: msg || 'Invalid context handle' };
+    };
+
+    /**
+     * Read a variable from this context, returned as a parsed JavaScript value.
+     *
+     * @param {string} name - Variable name
+     * @returns {*} The variable's value (parsed from JSON), or undefined if not found
+     */
+    HemlockContext.prototype.get = function(name) {
+        if (this._destroyed) { return undefined; }
+        var json = this._fns.ctxGet(this._handle, name);
+        if (json === null || json === undefined || json === '') {
+            return undefined;
+        }
+        try {
+            return JSON.parse(json);
+        } catch (e) {
+            // Return raw string if not valid JSON (e.g. function values)
+            return json;
+        }
+    };
+
+    /**
+     * Read a variable from this context as a raw JSON string.
+     *
+     * @param {string} name - Variable name
+     * @returns {string|null} JSON string, or null if not found
+     */
+    HemlockContext.prototype.getJSON = function(name) {
+        if (this._destroyed) { return null; }
+        var json = this._fns.ctxGet(this._handle, name);
+        if (json === null || json === undefined || json === '') {
+            return null;
+        }
+        return json;
+    };
+
+    /**
+     * Inject a value into this context. The value is serialized to JSON.
+     *
+     * @param {string} name - Variable name
+     * @param {*} value - Value to inject (must be JSON-serializable)
+     * @returns {boolean} true on success, false on error
+     */
+    HemlockContext.prototype.set = function(name, value) {
+        if (this._destroyed) { return false; }
+        var json = JSON.stringify(value);
+        if (json === undefined) { return false; }
+        var rc = this._fns.ctxSet(this._handle, name, json);
+        return rc === 0;
+    };
+
+    /**
+     * Inject a raw JSON string into this context.
+     *
+     * @param {string} name - Variable name
+     * @param {string} json - JSON string representing the value
+     * @returns {boolean} true on success, false on error
+     */
+    HemlockContext.prototype.setJSON = function(name, json) {
+        if (this._destroyed) { return false; }
+        var rc = this._fns.ctxSet(this._handle, name, json);
+        return rc === 0;
+    };
+
+    /**
+     * Get the error message from the last failed eval() or run().
+     *
+     * @returns {string|null} Error message, or null if the last call succeeded
+     */
+    HemlockContext.prototype.lastError = function() {
+        if (this._destroyed) { return null; }
+        var err = this._fns.ctxLastError(this._handle);
+        return (err === null || err === undefined || err === '') ? null : err;
+    };
+
+    /**
+     * Destroy this context and free all associated memory.
+     * After calling destroy(), all other methods become no-ops.
+     */
+    HemlockContext.prototype.destroy = function() {
+        if (this._destroyed) { return; }
+        this._fns.ctxDestroy(this._handle);
+        this._destroyed = true;
+        this._handle = 0;
+    };
+
+    /* ====================================================================
+     * HemlockScript - Cached (pre-compiled) script
+     * ==================================================================== */
+
+    /**
+     * A pre-compiled Hemlock script. Parse once, execute many times.
+     * Ideal for hot event handlers, animation callbacks, or per-frame logic.
+     *
+     * Do not construct directly - use hemlock.compile().
+     *
+     * @param {number} handle - Internal script handle
+     * @param {object} fns - Wrapped C functions
+     */
+    function HemlockScript(handle, fns) {
+        this._handle = handle;
+        this._fns = fns;
+        this._freed = false;
+    }
+
+    /**
+     * Execute this cached script in a persistent context.
+     * The script's AST is reused without re-parsing.
+     *
+     * @param {HemlockContext} context - The context to execute in
+     * @returns {{ ok: boolean, error: string|null }}
+     */
+    HemlockScript.prototype.run = function(context) {
+        if (this._freed) {
+            return { ok: false, error: 'Script has been freed' };
+        }
+        if (context._destroyed) {
+            return { ok: false, error: 'Context has been destroyed' };
+        }
+        var rc = this._fns.runScript(context._handle, this._handle);
+        if (rc === 0) {
+            return { ok: true, error: null };
+        }
+        var msg = context.lastError();
+        return { ok: false, error: msg || 'Script execution error (code ' + rc + ')' };
+    };
+
+    /**
+     * Free this cached script and release its AST.
+     *
+     * WARNING: Ensure no context still holds function values that reference
+     * this script's AST. Destroy or reset relevant contexts first.
+     */
+    HemlockScript.prototype.free = function() {
+        if (this._freed) { return; }
+        this._fns.freeScript(this._handle);
+        this._freed = true;
+        this._handle = 0;
+    };
+
+    /* ====================================================================
+     * Hemlock - Main API entry point
+     * ==================================================================== */
+
+    /**
+     * Main Hemlock WASM API.
+     * Use Hemlock.init() to create an instance.
+     *
+     * @param {object} module - Emscripten Module object
+     * @param {object} fns - Wrapped C functions
+     */
+    function Hemlock(module, fns) {
+        this._module = module;
+        this._fns = fns;
+
+        /** @type {string} Hemlock version string */
+        this.version = fns.version();
+    }
+
+    /**
+     * Initialize the Hemlock WASM module and return a ready-to-use API instance.
+     *
+     * @param {string|object} [options] - Path to hemlock.js (Node.js), or options object
+     * @param {string} [options.wasmUrl] - URL/path to hemlock.js
+     * @param {function} [options.print] - stdout handler (default: console.log)
+     * @param {function} [options.printErr] - stderr handler (default: console.error)
+     * @param {object} [options.Module] - Pre-configured Emscripten Module (browser)
+     * @returns {Promise<Hemlock>} Initialized Hemlock API instance
+     *
+     * @example
+     * // Browser (hemlock.js already loaded via <script>)
+     * var hemlock = await Hemlock.init();
+     *
+     * @example
+     * // Browser with custom output
+     * var hemlock = await Hemlock.init({
+     *     print: function(text) { myOutput.textContent += text + '\n'; },
+     *     printErr: function(text) { myErrors.textContent += text + '\n'; }
+     * });
+     *
+     * @example
+     * // Node.js
+     * var hemlock = await Hemlock.init('./wasm/hemlock.js');
+     *
+     * @example
+     * // Node.js with options
+     * var hemlock = await Hemlock.init({
+     *     wasmUrl: './wasm/hemlock.js',
+     *     print: function(text) { process.stdout.write(text + '\n'); }
+     * });
+     */
+    Hemlock.init = function(options) {
+        var opts = {};
+        if (typeof options === 'string') {
+            opts.wasmUrl = options;
+        } else if (options && typeof options === 'object') {
+            opts = options;
+        }
+
+        return new Promise(function(resolve, reject) {
+            var Module;
+
+            // Check if Module is already provided (pre-configured)
+            if (opts.Module) {
+                Module = opts.Module;
+            }
+            // Check for global Module (browser, already loaded via <script>)
+            else if (typeof root !== 'undefined' && root.Module &&
+                     typeof root.Module.cwrap === 'function') {
+                Module = root.Module;
+            }
+            // Node.js: require the Emscripten JS file
+            else if (opts.wasmUrl && typeof require === 'function') {
+                try {
+                    var path = require('path');
+                    var resolved = path.resolve(opts.wasmUrl);
+                    Module = require(resolved);
+                } catch (e) {
+                    reject(new Error('Failed to load hemlock.js: ' + e.message));
+                    return;
+                }
+            }
+            // Browser: Module not loaded yet
+            else if (typeof root !== 'undefined' && root.Module) {
+                Module = root.Module;
+            }
+            else {
+                reject(new Error(
+                    'Hemlock WASM module not found. ' +
+                    'In browser: load hemlock.js via <script> before calling init(). ' +
+                    'In Node.js: pass the path to hemlock.js as an argument.'
+                ));
+                return;
+            }
+
+            // Apply I/O overrides if provided
+            if (opts.print) { Module.print = opts.print; }
+            if (opts.printErr) { Module.printErr = opts.printErr; }
+
+            function bootstrap() {
+                try {
+                    var fns = wrapFunctions(Module);
+                    var instance = new Hemlock(Module, fns);
+                    resolve(instance);
+                } catch (e) {
+                    reject(new Error('Failed to initialize Hemlock API: ' + e.message));
+                }
+            }
+
+            // If cwrap is already available, the module is initialized
+            if (typeof Module.cwrap === 'function') {
+                // Still give Emscripten a tick to finish if needed
+                if (typeof Module.calledRun !== 'undefined' || Module._hemlock_version) {
+                    bootstrap();
+                } else {
+                    // Hook into onRuntimeInitialized
+                    var original = Module.onRuntimeInitialized;
+                    Module.onRuntimeInitialized = function() {
+                        if (original) { original.call(Module); }
+                        bootstrap();
+                    };
+                }
+            }
+            // Module returned a promise (newer Emscripten)
+            else if (typeof Module.then === 'function') {
+                Module.then(function(mod) {
+                    Module = mod;
+                    bootstrap();
+                }).catch(reject);
+            }
+            // Wait for onRuntimeInitialized
+            else {
+                var original = Module.onRuntimeInitialized;
+                Module.onRuntimeInitialized = function() {
+                    if (original) { original.call(Module); }
+                    bootstrap();
+                };
+            }
+        });
+    };
+
+    /**
+     * Wrap all exported C functions using Module.cwrap().
+     * @private
+     */
+    function wrapFunctions(Module) {
+        return {
+            eval:        Module.cwrap('hemlock_eval',              'number',  ['string']),
+            version:     Module.cwrap('hemlock_version',           'string',  []),
+            ctxCreate:   Module.cwrap('hemlock_context_create',    'number',  []),
+            ctxEval:     Module.cwrap('hemlock_context_eval',      'number',  ['number', 'string']),
+            ctxDestroy:  Module.cwrap('hemlock_context_destroy',   null,      ['number']),
+            ctxGet:      Module.cwrap('hemlock_context_get',       'string',  ['number', 'string']),
+            ctxSet:      Module.cwrap('hemlock_context_set',       'number',  ['number', 'string', 'string']),
+            ctxLastError:Module.cwrap('hemlock_context_last_error','string',  ['number']),
+            compile:     Module.cwrap('hemlock_compile_script',    'number',  ['string']),
+            runScript:   Module.cwrap('hemlock_run_script',        'number',  ['number', 'number']),
+            freeScript:  Module.cwrap('hemlock_free_script',       null,      ['number'])
+        };
+    }
+
+    /**
+     * Execute Hemlock source code (stateless, one-shot).
+     * Each call is independent - variables do not persist.
+     * Output goes to the print/printErr handlers configured at init().
+     *
+     * @param {string} source - Hemlock source code to execute
+     * @returns {number} 0 on success
+     */
+    Hemlock.prototype.eval = function(source) {
+        return this._fns.eval(source);
+    };
+
+    /**
+     * Create a new persistent context.
+     * Variables and functions defined in eval() calls persist across calls.
+     *
+     * @returns {HemlockContext} A new context, or throws on failure
+     *
+     * @example
+     * var ctx = hemlock.createContext();
+     * ctx.eval('let score = 0;');
+     * ctx.eval('score = score + 10;');
+     * ctx.get('score');  // 10
+     * ctx.destroy();
+     */
+    Hemlock.prototype.createContext = function() {
+        var handle = this._fns.ctxCreate();
+        if (handle === 0) {
+            throw new Error(
+                'Failed to create context (max ' +
+                'concurrent contexts may be exceeded)'
+            );
+        }
+        return new HemlockContext(handle, this._fns);
+    };
+
+    /**
+     * Pre-compile Hemlock source code into a cached script.
+     * The script can be executed repeatedly in any context without re-parsing.
+     *
+     * @param {string} source - Hemlock source code to compile
+     * @returns {HemlockScript} A compiled script handle, or throws on failure
+     *
+     * @example
+     * var ctx = hemlock.createContext();
+     * var tick = hemlock.compile('print("tick");');
+     * tick.run(ctx);  // executes without re-parsing
+     * tick.run(ctx);  // same AST, no re-parse
+     * tick.free();
+     * ctx.destroy();
+     */
+    Hemlock.prototype.compile = function(source) {
+        var handle = this._fns.compile(source);
+        if (handle === 0) {
+            throw new Error('Failed to compile script (parse error or table full)');
+        }
+        return new HemlockScript(handle, this._fns);
+    };
+
+    /**
+     * Get the raw Emscripten Module object.
+     * Useful for advanced operations not covered by this API.
+     *
+     * @returns {object} The Emscripten Module
+     */
+    Hemlock.prototype.getModule = function() {
+        return this._module;
+    };
+
+    /* ====================================================================
+     * Export
+     * ==================================================================== */
+
+    // Export for different environments
+    if (typeof module !== 'undefined' && module.exports) {
+        // Node.js / CommonJS
+        module.exports = { Hemlock: Hemlock, HemlockContext: HemlockContext, HemlockScript: HemlockScript };
+    } else if (typeof define === 'function' && define.amd) {
+        // AMD
+        define(function() { return { Hemlock: Hemlock, HemlockContext: HemlockContext, HemlockScript: HemlockScript }; });
+    } else {
+        // Browser global
+        root.Hemlock = Hemlock;
+        root.HemlockContext = HemlockContext;
+        root.HemlockScript = HemlockScript;
+    }
+
+})(typeof globalThis !== 'undefined' ? globalThis :
+   typeof self !== 'undefined' ? self :
+   typeof window !== 'undefined' ? window :
+   typeof global !== 'undefined' ? global : this);
diff --git a/wasm/hemlock.js b/wasm/hemlock.js
new file mode 100644
index 0000000..6b19e56
--- /dev/null
+++ b/wasm/hemlock.js
@@ -0,0 +1,6034 @@
+// include: shell.js
+// The Module object: Our interface to the outside world. We import
+// and export values on it. There are various ways Module can be used:
+// 1. Not defined. We create it here
+// 2. A function parameter, function(moduleArg) => Promise<Module>
+// 3. pre-run appended it, var Module = {}; ..generated code..
+// 4. External script tag defines var Module.
+// We need to check if Module already exists (e.g. case 3 above).
+// Substitution will be replaced with actual code on later stage of the build,
+// this way Closure Compiler will not mangle it (e.g. case 4. above).
+// Note that if you want to run closure, and also to use Module
+// after the generated code, you will need to define   var Module = {};
+// before the code. Then that object will be used in the code, and you
+// can continue to use Module afterwards as well.
+var Module = typeof Module != 'undefined' ? Module : {};
+
+// Determine the runtime environment we are in. You can customize this by
+// setting the ENVIRONMENT setting at compile time (see settings.js).
+
+// Attempt to auto-detect the environment
+var ENVIRONMENT_IS_WEB = typeof window == 'object';
+var ENVIRONMENT_IS_WORKER = typeof WorkerGlobalScope != 'undefined';
+// N.b. Electron.js environment is simultaneously a NODE-environment, but
+// also a web environment.
+var ENVIRONMENT_IS_NODE = typeof process == 'object' && typeof process.versions == 'object' && typeof process.versions.node == 'string' && process.type != 'renderer';
+var ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;
+
+if (ENVIRONMENT_IS_NODE) {
+
+}
+
+// --pre-jses are emitted after the Module integration code, so that they can
+// refer to Module (if they choose; they can also define Module)
+// include: wasm/pre.js
+// Hemlock WASM pre-init
+// This file is prepended to the Emscripten output.
+// It sets up the Module object for browser/Node.js environments.
+
+if (typeof Module === 'undefined') {
+    Module = {};
+}
+// end include: wasm/pre.js
+
+
+var arguments_ = [];
+var thisProgram = './this.program';
+var quit_ = (status, toThrow) => {
+  throw toThrow;
+};
+
+// `/` should be present at the end if `scriptDirectory` is not empty
+var scriptDirectory = '';
+function locateFile(path) {
+  if (Module['locateFile']) {
+    return Module['locateFile'](path, scriptDirectory);
+  }
+  return scriptDirectory + path;
+}
+
+// Hooks that are implemented differently in different runtime environments.
+var readAsync, readBinary;
+
+if (ENVIRONMENT_IS_NODE) {
+
+  // These modules will usually be used on Node.js. Load them eagerly to avoid
+  // the complexity of lazy-loading.
+  var fs = require('fs');
+  var nodePath = require('path');
+
+  scriptDirectory = __dirname + '/';
+
+// include: node_shell_read.js
+readBinary = (filename) => {
+  // We need to re-wrap `file://` strings to URLs.
+  filename = isFileURI(filename) ? new URL(filename) : filename;
+  var ret = fs.readFileSync(filename);
+  return ret;
+};
+
+readAsync = async (filename, binary = true) => {
+  // See the comment in the `readBinary` function.
+  filename = isFileURI(filename) ? new URL(filename) : filename;
+  var ret = fs.readFileSync(filename, binary ? undefined : 'utf8');
+  return ret;
+};
+// end include: node_shell_read.js
+  if (process.argv.length > 1) {
+    thisProgram = process.argv[1].replace(/\\/g, '/');
+  }
+
+  arguments_ = process.argv.slice(2);
+
+  // MODULARIZE will export the module in the proper place outside, we don't need to export here
+  if (typeof module != 'undefined') {
+    module['exports'] = Module;
+  }
+
+  quit_ = (status, toThrow) => {
+    process.exitCode = status;
+    throw toThrow;
+  };
+
+} else
+
+// Note that this includes Node.js workers when relevant (pthreads is enabled).
+// Node.js workers are detected as a combination of ENVIRONMENT_IS_WORKER and
+// ENVIRONMENT_IS_NODE.
+if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
+  if (ENVIRONMENT_IS_WORKER) { // Check worker, not web, since window could be polyfilled
+    scriptDirectory = self.location.href;
+  } else if (typeof document != 'undefined' && document.currentScript) { // web
+    scriptDirectory = document.currentScript.src;
+  }
+  // blob urls look like blob:http://site.com/etc/etc and we cannot infer anything from them.
+  // otherwise, slice off the final part of the url to find the script directory.
+  // if scriptDirectory does not contain a slash, lastIndexOf will return -1,
+  // and scriptDirectory will correctly be replaced with an empty string.
+  // If scriptDirectory contains a query (starting with ?) or a fragment (starting with #),
+  // they are removed because they could contain a slash.
+  if (scriptDirectory.startsWith('blob:')) {
+    scriptDirectory = '';
+  } else {
+    scriptDirectory = scriptDirectory.slice(0, scriptDirectory.replace(/[?#].*/, '').lastIndexOf('/')+1);
+  }
+
+  {
+// include: web_or_worker_shell_read.js
+if (ENVIRONMENT_IS_WORKER) {
+    readBinary = (url) => {
+      var xhr = new XMLHttpRequest();
+      xhr.open('GET', url, false);
+      xhr.responseType = 'arraybuffer';
+      xhr.send(null);
+      return new Uint8Array(/** @type{!ArrayBuffer} */(xhr.response));
+    };
+  }
+
+  readAsync = async (url) => {
+    // Fetch has some additional restrictions over XHR, like it can't be used on a file:// url.
+    // See https://github.com/github/fetch/pull/92#issuecomment-140665932
+    // Cordova or Electron apps are typically loaded from a file:// url.
+    // So use XHR on webview if URL is a file URL.
+    if (isFileURI(url)) {
+      return new Promise((resolve, reject) => {
+        var xhr = new XMLHttpRequest();
+        xhr.open('GET', url, true);
+        xhr.responseType = 'arraybuffer';
+        xhr.onload = () => {
+          if (xhr.status == 200 || (xhr.status == 0 && xhr.response)) { // file URLs can return 0
+            resolve(xhr.response);
+            return;
+          }
+          reject(xhr.status);
+        };
+        xhr.onerror = reject;
+        xhr.send(null);
+      });
+    }
+    var response = await fetch(url, { credentials: 'same-origin' });
+    if (response.ok) {
+      return response.arrayBuffer();
+    }
+    throw new Error(response.status + ' : ' + response.url);
+  };
+// end include: web_or_worker_shell_read.js
+  }
+} else
+{
+}
+
+var out = console.log.bind(console);
+var err = console.error.bind(console);
+
+// end include: shell.js
+
+// include: preamble.js
+// === Preamble library stuff ===
+
+// Documentation for the public APIs defined in this file must be updated in:
+//    site/source/docs/api_reference/preamble.js.rst
+// A prebuilt local version of the documentation is available at:
+//    site/build/text/docs/api_reference/preamble.js.txt
+// You can also build docs locally as HTML or other formats in site/
+// An online HTML version (which may be of a different version of Emscripten)
+//    is up at http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html
+
+var wasmBinary;
+
+// Wasm globals
+
+var wasmMemory;
+
+//========================================
+// Runtime essentials
+//========================================
+
+// whether we are quitting the application. no code should run after this.
+// set in exit() and abort()
+var ABORT = false;
+
+// set by exit() and abort().  Passed to 'onExit' handler.
+// NOTE: This is also used as the process return code code in shell environments
+// but only when noExitRuntime is false.
+var EXITSTATUS;
+
+// In STRICT mode, we only define assert() when ASSERTIONS is set.  i.e. we
+// don't define it at all in release modes.  This matches the behaviour of
+// MINIMAL_RUNTIME.
+// TODO(sbc): Make this the default even without STRICT enabled.
+/** @type {function(*, string=)} */
+function assert(condition, text) {
+  if (!condition) {
+    // This build was created without ASSERTIONS defined.  `assert()` should not
+    // ever be called in this configuration but in case there are callers in
+    // the wild leave this simple abort() implementation here for now.
+    abort(text);
+  }
+}
+
+// Memory management
+
+var HEAP,
+/** @type {!Int8Array} */
+  HEAP8,
+/** @type {!Uint8Array} */
+  HEAPU8,
+/** @type {!Int16Array} */
+  HEAP16,
+/** @type {!Uint16Array} */
+  HEAPU16,
+/** @type {!Int32Array} */
+  HEAP32,
+/** @type {!Uint32Array} */
+  HEAPU32,
+/** @type {!Float32Array} */
+  HEAPF32,
+/* BigInt64Array type is not correctly defined in closure
+/** not-@type {!BigInt64Array} */
+  HEAP64,
+/* BigUint64Array type is not correctly defined in closure
+/** not-t@type {!BigUint64Array} */
+  HEAPU64,
+/** @type {!Float64Array} */
+  HEAPF64;
+
+var runtimeInitialized = false;
+
+/**
+ * Indicates whether filename is delivered via file protocol (as opposed to http/https)
+ * @noinline
+ */
+var isFileURI = (filename) => filename.startsWith('file://');
+
+// include: runtime_shared.js
+// include: runtime_stack_check.js
+// end include: runtime_stack_check.js
+// include: runtime_exceptions.js
+// end include: runtime_exceptions.js
+// include: runtime_debug.js
+// end include: runtime_debug.js
+// include: memoryprofiler.js
+// end include: memoryprofiler.js
+
+
+function updateMemoryViews() {
+  var b = wasmMemory.buffer;
+  HEAP8 = new Int8Array(b);
+  HEAP16 = new Int16Array(b);
+  HEAPU8 = new Uint8Array(b);
+  HEAPU16 = new Uint16Array(b);
+  HEAP32 = new Int32Array(b);
+  HEAPU32 = new Uint32Array(b);
+  HEAPF32 = new Float32Array(b);
+  HEAPF64 = new Float64Array(b);
+  HEAP64 = new BigInt64Array(b);
+  HEAPU64 = new BigUint64Array(b);
+}
+
+// end include: runtime_shared.js
+function preRun() {
+  if (Module['preRun']) {
+    if (typeof Module['preRun'] == 'function') Module['preRun'] = [Module['preRun']];
+    while (Module['preRun'].length) {
+      addOnPreRun(Module['preRun'].shift());
+    }
+  }
+  // Begin ATPRERUNS hooks
+  callRuntimeCallbacks(onPreRuns);
+  // End ATPRERUNS hooks
+}
+
+function initRuntime() {
+  runtimeInitialized = true;
+
+  // Begin ATINITS hooks
+  SOCKFS.root = FS.mount(SOCKFS, {}, null);
+if (!Module['noFSInit'] && !FS.initialized) FS.init();
+TTY.init();
+PIPEFS.root = FS.mount(PIPEFS, {}, null);
+  // End ATINITS hooks
+
+  wasmExports['__wasm_call_ctors']();
+
+  // Begin ATPOSTCTORS hooks
+  FS.ignorePermissions = false;
+  // End ATPOSTCTORS hooks
+}
+
+function preMain() {
+  // No ATMAINS hooks
+}
+
+function postRun() {
+
+  if (Module['postRun']) {
+    if (typeof Module['postRun'] == 'function') Module['postRun'] = [Module['postRun']];
+    while (Module['postRun'].length) {
+      addOnPostRun(Module['postRun'].shift());
+    }
+  }
+
+  // Begin ATPOSTRUNS hooks
+  callRuntimeCallbacks(onPostRuns);
+  // End ATPOSTRUNS hooks
+}
+
+// A counter of dependencies for calling run(). If we need to
+// do asynchronous work before running, increment this and
+// decrement it. Incrementing must happen in a place like
+// Module.preRun (used by emcc to add file preloading).
+// Note that you can add dependencies in preRun, even though
+// it happens right before run - run will be postponed until
+// the dependencies are met.
+var runDependencies = 0;
+var dependenciesFulfilled = null; // overridden to take different actions when all run dependencies are fulfilled
+
+function getUniqueRunDependency(id) {
+  return id;
+}
+
+function addRunDependency(id) {
+  runDependencies++;
+
+  Module['monitorRunDependencies']?.(runDependencies);
+
+}
+
+function removeRunDependency(id) {
+  runDependencies--;
+
+  Module['monitorRunDependencies']?.(runDependencies);
+
+  if (runDependencies == 0) {
+    if (dependenciesFulfilled) {
+      var callback = dependenciesFulfilled;
+      dependenciesFulfilled = null;
+      callback(); // can add another dependenciesFulfilled
+    }
+  }
+}
+
+/** @param {string|number=} what */
+function abort(what) {
+  Module['onAbort']?.(what);
+
+  what = 'Aborted(' + what + ')';
+  // TODO(sbc): Should we remove printing and leave it up to whoever
+  // catches the exception?
+  err(what);
+
+  ABORT = true;
+
+  what += '. Build with -sASSERTIONS for more info.';
+
+  // Use a wasm runtime error, because a JS error might be seen as a foreign
+  // exception, which means we'd run destructors on it. We need the error to
+  // simply make the program stop.
+  // FIXME This approach does not work in Wasm EH because it currently does not assume
+  // all RuntimeErrors are from traps; it decides whether a RuntimeError is from
+  // a trap or not based on a hidden field within the object. So at the moment
+  // we don't have a way of throwing a wasm trap from JS. TODO Make a JS API that
+  // allows this in the wasm spec.
+
+  // Suppress closure compiler warning here. Closure compiler's builtin extern
+  // definition for WebAssembly.RuntimeError claims it takes no arguments even
+  // though it can.
+  // TODO(https://github.com/google/closure-compiler/pull/3913): Remove if/when upstream closure gets fixed.
+  /** @suppress {checkTypes} */
+  var e = new WebAssembly.RuntimeError(what);
+
+  // Throw the error whether or not MODULARIZE is set because abort is used
+  // in code paths apart from instantiation where an exception is expected
+  // to be thrown when abort is called.
+  throw e;
+}
+
+var wasmBinaryFile;
+
+function findWasmBinary() {
+    return locateFile('hemlock.wasm');
+}
+
+function getBinarySync(file) {
+  if (file == wasmBinaryFile && wasmBinary) {
+    return new Uint8Array(wasmBinary);
+  }
+  if (readBinary) {
+    return readBinary(file);
+  }
+  throw 'both async and sync fetching of the wasm failed';
+}
+
+async function getWasmBinary(binaryFile) {
+  // If we don't have the binary yet, load it asynchronously using readAsync.
+  if (!wasmBinary) {
+    // Fetch the binary using readAsync
+    try {
+      var response = await readAsync(binaryFile);
+      return new Uint8Array(response);
+    } catch {
+      // Fall back to getBinarySync below;
+    }
+  }
+
+  // Otherwise, getBinarySync should be able to get it synchronously
+  return getBinarySync(binaryFile);
+}
+
+async function instantiateArrayBuffer(binaryFile, imports) {
+  try {
+    var binary = await getWasmBinary(binaryFile);
+    var instance = await WebAssembly.instantiate(binary, imports);
+    return instance;
+  } catch (reason) {
+    err(`failed to asynchronously prepare wasm: ${reason}`);
+
+    abort(reason);
+  }
+}
+
+async function instantiateAsync(binary, binaryFile, imports) {
+  if (!binary && typeof WebAssembly.instantiateStreaming == 'function'
+      // Don't use streaming for file:// delivered objects in a webview, fetch them synchronously.
+      && !isFileURI(binaryFile)
+      // Avoid instantiateStreaming() on Node.js environment for now, as while
+      // Node.js v18.1.0 implements it, it does not have a full fetch()
+      // implementation yet.
+      //
+      // Reference:
+      //   https://github.com/emscripten-core/emscripten/pull/16917
+      && !ENVIRONMENT_IS_NODE
+     ) {
+    try {
+      var response = fetch(binaryFile, { credentials: 'same-origin' });
+      var instantiationResult = await WebAssembly.instantiateStreaming(response, imports);
+      return instantiationResult;
+    } catch (reason) {
+      // We expect the most common failure cause to be a bad MIME type for the binary,
+      // in which case falling back to ArrayBuffer instantiation should work.
+      err(`wasm streaming compile failed: ${reason}`);
+      err('falling back to ArrayBuffer instantiation');
+      // fall back of instantiateArrayBuffer below
+    };
+  }
+  return instantiateArrayBuffer(binaryFile, imports);
+}
+
+function getWasmImports() {
+  // prepare imports
+  return {
+    'env': wasmImports,
+    'wasi_snapshot_preview1': wasmImports,
+  }
+}
+
+// Create the wasm instance.
+// Receives the wasm imports, returns the exports.
+async function createWasm() {
+  // Load the wasm module and create an instance of using native support in the JS engine.
+  // handle a generated wasm instance, receiving its exports and
+  // performing other necessary setup
+  /** @param {WebAssembly.Module=} module*/
+  function receiveInstance(instance, module) {
+    wasmExports = instance.exports;
+
+    
+
+    wasmMemory = wasmExports['memory'];
+    
+    updateMemoryViews();
+
+    wasmTable = wasmExports['__indirect_function_table'];
+    
+
+    removeRunDependency('wasm-instantiate');
+    return wasmExports;
+  }
+  // wait for the pthread pool (if any)
+  addRunDependency('wasm-instantiate');
+
+  // Prefer streaming instantiation if available.
+  function receiveInstantiationResult(result) {
+    // 'result' is a ResultObject object which has both the module and instance.
+    // receiveInstance() will swap in the exports (to Module.asm) so they can be called
+    // TODO: Due to Closure regression https://github.com/google/closure-compiler/issues/3193, the above line no longer optimizes out down to the following line.
+    // When the regression is fixed, can restore the above PTHREADS-enabled path.
+    return receiveInstance(result['instance']);
+  }
+
+  var info = getWasmImports();
+
+  // User shell pages can write their own Module.instantiateWasm = function(imports, successCallback) callback
+  // to manually instantiate the Wasm module themselves. This allows pages to
+  // run the instantiation parallel to any other async startup actions they are
+  // performing.
+  // Also pthreads and wasm workers initialize the wasm instance through this
+  // path.
+  if (Module['instantiateWasm']) {
+    return new Promise((resolve, reject) => {
+        Module['instantiateWasm'](info, (mod, inst) => {
+          resolve(receiveInstance(mod, inst));
+        });
+    });
+  }
+
+  wasmBinaryFile ??= findWasmBinary();
+    var result = await instantiateAsync(wasmBinary, wasmBinaryFile, info);
+    var exports = receiveInstantiationResult(result);
+    return exports;
+}
+
+// end include: preamble.js
+
+// Begin JS library code
+
+
+  class ExitStatus {
+      name = 'ExitStatus';
+      constructor(status) {
+        this.message = `Program terminated with exit(${status})`;
+        this.status = status;
+      }
+    }
+
+  var callRuntimeCallbacks = (callbacks) => {
+      while (callbacks.length > 0) {
+        // Pass the module as the first argument.
+        callbacks.shift()(Module);
+      }
+    };
+  var onPostRuns = [];
+  var addOnPostRun = (cb) => onPostRuns.push(cb);
+
+  var onPreRuns = [];
+  var addOnPreRun = (cb) => onPreRuns.push(cb);
+
+
+  
+    /**
+     * @param {number} ptr
+     * @param {string} type
+     */
+  function getValue(ptr, type = 'i8') {
+    if (type.endsWith('*')) type = '*';
+    switch (type) {
+      case 'i1': return HEAP8[ptr];
+      case 'i8': return HEAP8[ptr];
+      case 'i16': return HEAP16[((ptr)>>1)];
+      case 'i32': return HEAP32[((ptr)>>2)];
+      case 'i64': return HEAP64[((ptr)>>3)];
+      case 'float': return HEAPF32[((ptr)>>2)];
+      case 'double': return HEAPF64[((ptr)>>3)];
+      case '*': return HEAPU32[((ptr)>>2)];
+      default: abort(`invalid type for getValue: ${type}`);
+    }
+  }
+
+  var noExitRuntime = true;
+
+  
+    /**
+     * @param {number} ptr
+     * @param {number} value
+     * @param {string} type
+     */
+  function setValue(ptr, value, type = 'i8') {
+    if (type.endsWith('*')) type = '*';
+    switch (type) {
+      case 'i1': HEAP8[ptr] = value; break;
+      case 'i8': HEAP8[ptr] = value; break;
+      case 'i16': HEAP16[((ptr)>>1)] = value; break;
+      case 'i32': HEAP32[((ptr)>>2)] = value; break;
+      case 'i64': HEAP64[((ptr)>>3)] = BigInt(value); break;
+      case 'float': HEAPF32[((ptr)>>2)] = value; break;
+      case 'double': HEAPF64[((ptr)>>3)] = value; break;
+      case '*': HEAPU32[((ptr)>>2)] = value; break;
+      default: abort(`invalid type for setValue: ${type}`);
+    }
+  }
+
+  var stackRestore = (val) => __emscripten_stack_restore(val);
+
+  var stackSave = () => _emscripten_stack_get_current();
+
+  var wasmTableMirror = [];
+  
+  /** @type {WebAssembly.Table} */
+  var wasmTable;
+  var getWasmTableEntry = (funcPtr) => {
+      var func = wasmTableMirror[funcPtr];
+      if (!func) {
+        /** @suppress {checkTypes} */
+        wasmTableMirror[funcPtr] = func = wasmTable.get(funcPtr);
+      }
+      return func;
+    };
+  var ___call_sighandler = (fp, sig) => getWasmTableEntry(fp)(sig);
+
+  var initRandomFill = () => {
+      // This block is not needed on v19+ since crypto.getRandomValues is builtin
+      if (ENVIRONMENT_IS_NODE) {
+        var nodeCrypto = require('crypto');
+        return (view) => nodeCrypto.randomFillSync(view);
+      }
+  
+      return (view) => crypto.getRandomValues(view);
+    };
+  var randomFill = (view) => {
+      // Lazily init on the first invocation.
+      (randomFill = initRandomFill())(view);
+    };
+  
+  var PATH = {
+  isAbs:(path) => path.charAt(0) === '/',
+  splitPath:(filename) => {
+        var splitPathRe = /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
+        return splitPathRe.exec(filename).slice(1);
+      },
+  normalizeArray:(parts, allowAboveRoot) => {
+        // if the path tries to go above the root, `up` ends up > 0
+        var up = 0;
+        for (var i = parts.length - 1; i >= 0; i--) {
+          var last = parts[i];
+          if (last === '.') {
+            parts.splice(i, 1);
+          } else if (last === '..') {
+            parts.splice(i, 1);
+            up++;
+          } else if (up) {
+            parts.splice(i, 1);
+            up--;
+          }
+        }
+        // if the path is allowed to go above the root, restore leading ..s
+        if (allowAboveRoot) {
+          for (; up; up--) {
+            parts.unshift('..');
+          }
+        }
+        return parts;
+      },
+  normalize:(path) => {
+        var isAbsolute = PATH.isAbs(path),
+            trailingSlash = path.slice(-1) === '/';
+        // Normalize the path
+        path = PATH.normalizeArray(path.split('/').filter((p) => !!p), !isAbsolute).join('/');
+        if (!path && !isAbsolute) {
+          path = '.';
+        }
+        if (path && trailingSlash) {
+          path += '/';
+        }
+        return (isAbsolute ? '/' : '') + path;
+      },
+  dirname:(path) => {
+        var result = PATH.splitPath(path),
+            root = result[0],
+            dir = result[1];
+        if (!root && !dir) {
+          // No dirname whatsoever
+          return '.';
+        }
+        if (dir) {
+          // It has a dirname, strip trailing slash
+          dir = dir.slice(0, -1);
+        }
+        return root + dir;
+      },
+  basename:(path) => path && path.match(/([^\/]+|\/)\/*$/)[1],
+  join:(...paths) => PATH.normalize(paths.join('/')),
+  join2:(l, r) => PATH.normalize(l + '/' + r),
+  };
+  
+  
+  var PATH_FS = {
+  resolve:(...args) => {
+        var resolvedPath = '',
+          resolvedAbsolute = false;
+        for (var i = args.length - 1; i >= -1 && !resolvedAbsolute; i--) {
+          var path = (i >= 0) ? args[i] : FS.cwd();
+          // Skip empty and invalid entries
+          if (typeof path != 'string') {
+            throw new TypeError('Arguments to path.resolve must be strings');
+          } else if (!path) {
+            return ''; // an invalid portion invalidates the whole thing
+          }
+          resolvedPath = path + '/' + resolvedPath;
+          resolvedAbsolute = PATH.isAbs(path);
+        }
+        // At this point the path should be resolved to a full absolute path, but
+        // handle relative paths to be safe (might happen when process.cwd() fails)
+        resolvedPath = PATH.normalizeArray(resolvedPath.split('/').filter((p) => !!p), !resolvedAbsolute).join('/');
+        return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
+      },
+  relative:(from, to) => {
+        from = PATH_FS.resolve(from).slice(1);
+        to = PATH_FS.resolve(to).slice(1);
+        function trim(arr) {
+          var start = 0;
+          for (; start < arr.length; start++) {
+            if (arr[start] !== '') break;
+          }
+          var end = arr.length - 1;
+          for (; end >= 0; end--) {
+            if (arr[end] !== '') break;
+          }
+          if (start > end) return [];
+          return arr.slice(start, end - start + 1);
+        }
+        var fromParts = trim(from.split('/'));
+        var toParts = trim(to.split('/'));
+        var length = Math.min(fromParts.length, toParts.length);
+        var samePartsLength = length;
+        for (var i = 0; i < length; i++) {
+          if (fromParts[i] !== toParts[i]) {
+            samePartsLength = i;
+            break;
+          }
+        }
+        var outputParts = [];
+        for (var i = samePartsLength; i < fromParts.length; i++) {
+          outputParts.push('..');
+        }
+        outputParts = outputParts.concat(toParts.slice(samePartsLength));
+        return outputParts.join('/');
+      },
+  };
+  
+  
+  var UTF8Decoder = typeof TextDecoder != 'undefined' ? new TextDecoder() : undefined;
+  
+    /**
+     * Given a pointer 'idx' to a null-terminated UTF8-encoded string in the given
+     * array that contains uint8 values, returns a copy of that string as a
+     * Javascript String object.
+     * heapOrArray is either a regular array, or a JavaScript typed array view.
+     * @param {number=} idx
+     * @param {number=} maxBytesToRead
+     * @return {string}
+     */
+  var UTF8ArrayToString = (heapOrArray, idx = 0, maxBytesToRead = NaN) => {
+      var endIdx = idx + maxBytesToRead;
+      var endPtr = idx;
+      // TextDecoder needs to know the byte length in advance, it doesn't stop on
+      // null terminator by itself.  Also, use the length info to avoid running tiny
+      // strings through TextDecoder, since .subarray() allocates garbage.
+      // (As a tiny code save trick, compare endPtr against endIdx using a negation,
+      // so that undefined/NaN means Infinity)
+      while (heapOrArray[endPtr] && !(endPtr >= endIdx)) ++endPtr;
+  
+      if (endPtr - idx > 16 && heapOrArray.buffer && UTF8Decoder) {
+        return UTF8Decoder.decode(heapOrArray.subarray(idx, endPtr));
+      }
+      var str = '';
+      // If building with TextDecoder, we have already computed the string length
+      // above, so test loop end condition against that
+      while (idx < endPtr) {
+        // For UTF8 byte structure, see:
+        // http://en.wikipedia.org/wiki/UTF-8#Description
+        // https://www.ietf.org/rfc/rfc2279.txt
+        // https://tools.ietf.org/html/rfc3629
+        var u0 = heapOrArray[idx++];
+        if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
+        var u1 = heapOrArray[idx++] & 63;
+        if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
+        var u2 = heapOrArray[idx++] & 63;
+        if ((u0 & 0xF0) == 0xE0) {
+          u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
+        } else {
+          u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (heapOrArray[idx++] & 63);
+        }
+  
+        if (u0 < 0x10000) {
+          str += String.fromCharCode(u0);
+        } else {
+          var ch = u0 - 0x10000;
+          str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
+        }
+      }
+      return str;
+    };
+  
+  var FS_stdin_getChar_buffer = [];
+  
+  var lengthBytesUTF8 = (str) => {
+      var len = 0;
+      for (var i = 0; i < str.length; ++i) {
+        // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code
+        // unit, not a Unicode code point of the character! So decode
+        // UTF16->UTF32->UTF8.
+        // See http://unicode.org/faq/utf_bom.html#utf16-3
+        var c = str.charCodeAt(i); // possibly a lead surrogate
+        if (c <= 0x7F) {
+          len++;
+        } else if (c <= 0x7FF) {
+          len += 2;
+        } else if (c >= 0xD800 && c <= 0xDFFF) {
+          len += 4; ++i;
+        } else {
+          len += 3;
+        }
+      }
+      return len;
+    };
+  
+  var stringToUTF8Array = (str, heap, outIdx, maxBytesToWrite) => {
+      // Parameter maxBytesToWrite is not optional. Negative values, 0, null,
+      // undefined and false each don't write out any bytes.
+      if (!(maxBytesToWrite > 0))
+        return 0;
+  
+      var startIdx = outIdx;
+      var endIdx = outIdx + maxBytesToWrite - 1; // -1 for string null terminator.
+      for (var i = 0; i < str.length; ++i) {
+        // Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code
+        // unit, not a Unicode code point of the character! So decode
+        // UTF16->UTF32->UTF8.
+        // See http://unicode.org/faq/utf_bom.html#utf16-3
+        // For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description
+        // and https://www.ietf.org/rfc/rfc2279.txt
+        // and https://tools.ietf.org/html/rfc3629
+        var u = str.charCodeAt(i); // possibly a lead surrogate
+        if (u >= 0xD800 && u <= 0xDFFF) {
+          var u1 = str.charCodeAt(++i);
+          u = 0x10000 + ((u & 0x3FF) << 10) | (u1 & 0x3FF);
+        }
+        if (u <= 0x7F) {
+          if (outIdx >= endIdx) break;
+          heap[outIdx++] = u;
+        } else if (u <= 0x7FF) {
+          if (outIdx + 1 >= endIdx) break;
+          heap[outIdx++] = 0xC0 | (u >> 6);
+          heap[outIdx++] = 0x80 | (u & 63);
+        } else if (u <= 0xFFFF) {
+          if (outIdx + 2 >= endIdx) break;
+          heap[outIdx++] = 0xE0 | (u >> 12);
+          heap[outIdx++] = 0x80 | ((u >> 6) & 63);
+          heap[outIdx++] = 0x80 | (u & 63);
+        } else {
+          if (outIdx + 3 >= endIdx) break;
+          heap[outIdx++] = 0xF0 | (u >> 18);
+          heap[outIdx++] = 0x80 | ((u >> 12) & 63);
+          heap[outIdx++] = 0x80 | ((u >> 6) & 63);
+          heap[outIdx++] = 0x80 | (u & 63);
+        }
+      }
+      // Null-terminate the pointer to the buffer.
+      heap[outIdx] = 0;
+      return outIdx - startIdx;
+    };
+  /** @type {function(string, boolean=, number=)} */
+  var intArrayFromString = (stringy, dontAddNull, length) => {
+      var len = length > 0 ? length : lengthBytesUTF8(stringy)+1;
+      var u8array = new Array(len);
+      var numBytesWritten = stringToUTF8Array(stringy, u8array, 0, u8array.length);
+      if (dontAddNull) u8array.length = numBytesWritten;
+      return u8array;
+    };
+  var FS_stdin_getChar = () => {
+      if (!FS_stdin_getChar_buffer.length) {
+        var result = null;
+        if (ENVIRONMENT_IS_NODE) {
+          // we will read data by chunks of BUFSIZE
+          var BUFSIZE = 256;
+          var buf = Buffer.alloc(BUFSIZE);
+          var bytesRead = 0;
+  
+          // For some reason we must suppress a closure warning here, even though
+          // fd definitely exists on process.stdin, and is even the proper way to
+          // get the fd of stdin,
+          // https://github.com/nodejs/help/issues/2136#issuecomment-523649904
+          // This started to happen after moving this logic out of library_tty.js,
+          // so it is related to the surrounding code in some unclear manner.
+          /** @suppress {missingProperties} */
+          var fd = process.stdin.fd;
+  
+          try {
+            bytesRead = fs.readSync(fd, buf, 0, BUFSIZE);
+          } catch(e) {
+            // Cross-platform differences: on Windows, reading EOF throws an
+            // exception, but on other OSes, reading EOF returns 0. Uniformize
+            // behavior by treating the EOF exception to return 0.
+            if (e.toString().includes('EOF')) bytesRead = 0;
+            else throw e;
+          }
+  
+          if (bytesRead > 0) {
+            result = buf.slice(0, bytesRead).toString('utf-8');
+          }
+        } else
+        if (typeof window != 'undefined' &&
+          typeof window.prompt == 'function') {
+          // Browser.
+          result = window.prompt('Input: ');  // returns null on cancel
+          if (result !== null) {
+            result += '\n';
+          }
+        } else
+        {}
+        if (!result) {
+          return null;
+        }
+        FS_stdin_getChar_buffer = intArrayFromString(result, true);
+      }
+      return FS_stdin_getChar_buffer.shift();
+    };
+  var TTY = {
+  ttys:[],
+  init() {
+        // https://github.com/emscripten-core/emscripten/pull/1555
+        // if (ENVIRONMENT_IS_NODE) {
+        //   // currently, FS.init does not distinguish if process.stdin is a file or TTY
+        //   // device, it always assumes it's a TTY device. because of this, we're forcing
+        //   // process.stdin to UTF8 encoding to at least make stdin reading compatible
+        //   // with text files until FS.init can be refactored.
+        //   process.stdin.setEncoding('utf8');
+        // }
+      },
+  shutdown() {
+        // https://github.com/emscripten-core/emscripten/pull/1555
+        // if (ENVIRONMENT_IS_NODE) {
+        //   // inolen: any idea as to why node -e 'process.stdin.read()' wouldn't exit immediately (with process.stdin being a tty)?
+        //   // isaacs: because now it's reading from the stream, you've expressed interest in it, so that read() kicks off a _read() which creates a ReadReq operation
+        //   // inolen: I thought read() in that case was a synchronous operation that just grabbed some amount of buffered data if it exists?
+        //   // isaacs: it is. but it also triggers a _read() call, which calls readStart() on the handle
+        //   // isaacs: do process.stdin.pause() and i'd think it'd probably close the pending call
+        //   process.stdin.pause();
+        // }
+      },
+  register(dev, ops) {
+        TTY.ttys[dev] = { input: [], output: [], ops: ops };
+        FS.registerDevice(dev, TTY.stream_ops);
+      },
+  stream_ops:{
+  open(stream) {
+          var tty = TTY.ttys[stream.node.rdev];
+          if (!tty) {
+            throw new FS.ErrnoError(43);
+          }
+          stream.tty = tty;
+          stream.seekable = false;
+        },
+  close(stream) {
+          // flush any pending line data
+          stream.tty.ops.fsync(stream.tty);
+        },
+  fsync(stream) {
+          stream.tty.ops.fsync(stream.tty);
+        },
+  read(stream, buffer, offset, length, pos /* ignored */) {
+          if (!stream.tty || !stream.tty.ops.get_char) {
+            throw new FS.ErrnoError(60);
+          }
+          var bytesRead = 0;
+          for (var i = 0; i < length; i++) {
+            var result;
+            try {
+              result = stream.tty.ops.get_char(stream.tty);
+            } catch (e) {
+              throw new FS.ErrnoError(29);
+            }
+            if (result === undefined && bytesRead === 0) {
+              throw new FS.ErrnoError(6);
+            }
+            if (result === null || result === undefined) break;
+            bytesRead++;
+            buffer[offset+i] = result;
+          }
+          if (bytesRead) {
+            stream.node.atime = Date.now();
+          }
+          return bytesRead;
+        },
+  write(stream, buffer, offset, length, pos) {
+          if (!stream.tty || !stream.tty.ops.put_char) {
+            throw new FS.ErrnoError(60);
+          }
+          try {
+            for (var i = 0; i < length; i++) {
+              stream.tty.ops.put_char(stream.tty, buffer[offset+i]);
+            }
+          } catch (e) {
+            throw new FS.ErrnoError(29);
+          }
+          if (length) {
+            stream.node.mtime = stream.node.ctime = Date.now();
+          }
+          return i;
+        },
+  },
+  default_tty_ops:{
+  get_char(tty) {
+          return FS_stdin_getChar();
+        },
+  put_char(tty, val) {
+          if (val === null || val === 10) {
+            out(UTF8ArrayToString(tty.output));
+            tty.output = [];
+          } else {
+            if (val != 0) tty.output.push(val); // val == 0 would cut text output off in the middle.
+          }
+        },
+  fsync(tty) {
+          if (tty.output?.length > 0) {
+            out(UTF8ArrayToString(tty.output));
+            tty.output = [];
+          }
+        },
+  ioctl_tcgets(tty) {
+          // typical setting
+          return {
+            c_iflag: 25856,
+            c_oflag: 5,
+            c_cflag: 191,
+            c_lflag: 35387,
+            c_cc: [
+              0x03, 0x1c, 0x7f, 0x15, 0x04, 0x00, 0x01, 0x00, 0x11, 0x13, 0x1a, 0x00,
+              0x12, 0x0f, 0x17, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+              0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            ]
+          };
+        },
+  ioctl_tcsets(tty, optional_actions, data) {
+          // currently just ignore
+          return 0;
+        },
+  ioctl_tiocgwinsz(tty) {
+          return [24, 80];
+        },
+  },
+  default_tty1_ops:{
+  put_char(tty, val) {
+          if (val === null || val === 10) {
+            err(UTF8ArrayToString(tty.output));
+            tty.output = [];
+          } else {
+            if (val != 0) tty.output.push(val);
+          }
+        },
+  fsync(tty) {
+          if (tty.output?.length > 0) {
+            err(UTF8ArrayToString(tty.output));
+            tty.output = [];
+          }
+        },
+  },
+  };
+  
+  
+  var zeroMemory = (ptr, size) => HEAPU8.fill(0, ptr, ptr + size);
+  
+  var alignMemory = (size, alignment) => {
+      return Math.ceil(size / alignment) * alignment;
+    };
+  var mmapAlloc = (size) => {
+      size = alignMemory(size, 65536);
+      var ptr = _emscripten_builtin_memalign(65536, size);
+      if (ptr) zeroMemory(ptr, size);
+      return ptr;
+    };
+  var MEMFS = {
+  ops_table:null,
+  mount(mount) {
+        return MEMFS.createNode(null, '/', 16895, 0);
+      },
+  createNode(parent, name, mode, dev) {
+        if (FS.isBlkdev(mode) || FS.isFIFO(mode)) {
+          // no supported
+          throw new FS.ErrnoError(63);
+        }
+        MEMFS.ops_table ||= {
+          dir: {
+            node: {
+              getattr: MEMFS.node_ops.getattr,
+              setattr: MEMFS.node_ops.setattr,
+              lookup: MEMFS.node_ops.lookup,
+              mknod: MEMFS.node_ops.mknod,
+              rename: MEMFS.node_ops.rename,
+              unlink: MEMFS.node_ops.unlink,
+              rmdir: MEMFS.node_ops.rmdir,
+              readdir: MEMFS.node_ops.readdir,
+              symlink: MEMFS.node_ops.symlink
+            },
+            stream: {
+              llseek: MEMFS.stream_ops.llseek
+            }
+          },
+          file: {
+            node: {
+              getattr: MEMFS.node_ops.getattr,
+              setattr: MEMFS.node_ops.setattr
+            },
+            stream: {
+              llseek: MEMFS.stream_ops.llseek,
+              read: MEMFS.stream_ops.read,
+              write: MEMFS.stream_ops.write,
+              mmap: MEMFS.stream_ops.mmap,
+              msync: MEMFS.stream_ops.msync
+            }
+          },
+          link: {
+            node: {
+              getattr: MEMFS.node_ops.getattr,
+              setattr: MEMFS.node_ops.setattr,
+              readlink: MEMFS.node_ops.readlink
+            },
+            stream: {}
+          },
+          chrdev: {
+            node: {
+              getattr: MEMFS.node_ops.getattr,
+              setattr: MEMFS.node_ops.setattr
+            },
+            stream: FS.chrdev_stream_ops
+          }
+        };
+        var node = FS.createNode(parent, name, mode, dev);
+        if (FS.isDir(node.mode)) {
+          node.node_ops = MEMFS.ops_table.dir.node;
+          node.stream_ops = MEMFS.ops_table.dir.stream;
+          node.contents = {};
+        } else if (FS.isFile(node.mode)) {
+          node.node_ops = MEMFS.ops_table.file.node;
+          node.stream_ops = MEMFS.ops_table.file.stream;
+          node.usedBytes = 0; // The actual number of bytes used in the typed array, as opposed to contents.length which gives the whole capacity.
+          // When the byte data of the file is populated, this will point to either a typed array, or a normal JS array. Typed arrays are preferred
+          // for performance, and used by default. However, typed arrays are not resizable like normal JS arrays are, so there is a small disk size
+          // penalty involved for appending file writes that continuously grow a file similar to std::vector capacity vs used -scheme.
+          node.contents = null; 
+        } else if (FS.isLink(node.mode)) {
+          node.node_ops = MEMFS.ops_table.link.node;
+          node.stream_ops = MEMFS.ops_table.link.stream;
+        } else if (FS.isChrdev(node.mode)) {
+          node.node_ops = MEMFS.ops_table.chrdev.node;
+          node.stream_ops = MEMFS.ops_table.chrdev.stream;
+        }
+        node.atime = node.mtime = node.ctime = Date.now();
+        // add the new node to the parent
+        if (parent) {
+          parent.contents[name] = node;
+          parent.atime = parent.mtime = parent.ctime = node.atime;
+        }
+        return node;
+      },
+  getFileDataAsTypedArray(node) {
+        if (!node.contents) return new Uint8Array(0);
+        if (node.contents.subarray) return node.contents.subarray(0, node.usedBytes); // Make sure to not return excess unused bytes.
+        return new Uint8Array(node.contents);
+      },
+  expandFileStorage(node, newCapacity) {
+        var prevCapacity = node.contents ? node.contents.length : 0;
+        if (prevCapacity >= newCapacity) return; // No need to expand, the storage was already large enough.
+        // Don't expand strictly to the given requested limit if it's only a very small increase, but instead geometrically grow capacity.
+        // For small filesizes (<1MB), perform size*2 geometric increase, but for large sizes, do a much more conservative size*1.125 increase to
+        // avoid overshooting the allocation cap by a very large margin.
+        var CAPACITY_DOUBLING_MAX = 1024 * 1024;
+        newCapacity = Math.max(newCapacity, (prevCapacity * (prevCapacity < CAPACITY_DOUBLING_MAX ? 2.0 : 1.125)) >>> 0);
+        if (prevCapacity != 0) newCapacity = Math.max(newCapacity, 256); // At minimum allocate 256b for each file when expanding.
+        var oldContents = node.contents;
+        node.contents = new Uint8Array(newCapacity); // Allocate new storage.
+        if (node.usedBytes > 0) node.contents.set(oldContents.subarray(0, node.usedBytes), 0); // Copy old data over to the new storage.
+      },
+  resizeFileStorage(node, newSize) {
+        if (node.usedBytes == newSize) return;
+        if (newSize == 0) {
+          node.contents = null; // Fully decommit when requesting a resize to zero.
+          node.usedBytes = 0;
+        } else {
+          var oldContents = node.contents;
+          node.contents = new Uint8Array(newSize); // Allocate new storage.
+          if (oldContents) {
+            node.contents.set(oldContents.subarray(0, Math.min(newSize, node.usedBytes))); // Copy old data over to the new storage.
+          }
+          node.usedBytes = newSize;
+        }
+      },
+  node_ops:{
+  getattr(node) {
+          var attr = {};
+          // device numbers reuse inode numbers.
+          attr.dev = FS.isChrdev(node.mode) ? node.id : 1;
+          attr.ino = node.id;
+          attr.mode = node.mode;
+          attr.nlink = 1;
+          attr.uid = 0;
+          attr.gid = 0;
+          attr.rdev = node.rdev;
+          if (FS.isDir(node.mode)) {
+            attr.size = 4096;
+          } else if (FS.isFile(node.mode)) {
+            attr.size = node.usedBytes;
+          } else if (FS.isLink(node.mode)) {
+            attr.size = node.link.length;
+          } else {
+            attr.size = 0;
+          }
+          attr.atime = new Date(node.atime);
+          attr.mtime = new Date(node.mtime);
+          attr.ctime = new Date(node.ctime);
+          // NOTE: In our implementation, st_blocks = Math.ceil(st_size/st_blksize),
+          //       but this is not required by the standard.
+          attr.blksize = 4096;
+          attr.blocks = Math.ceil(attr.size / attr.blksize);
+          return attr;
+        },
+  setattr(node, attr) {
+          for (const key of ["mode", "atime", "mtime", "ctime"]) {
+            if (attr[key] != null) {
+              node[key] = attr[key];
+            }
+          }
+          if (attr.size !== undefined) {
+            MEMFS.resizeFileStorage(node, attr.size);
+          }
+        },
+  lookup(parent, name) {
+          throw MEMFS.doesNotExistError;
+        },
+  mknod(parent, name, mode, dev) {
+          return MEMFS.createNode(parent, name, mode, dev);
+        },
+  rename(old_node, new_dir, new_name) {
+          var new_node;
+          try {
+            new_node = FS.lookupNode(new_dir, new_name);
+          } catch (e) {}
+          if (new_node) {
+            if (FS.isDir(old_node.mode)) {
+              // if we're overwriting a directory at new_name, make sure it's empty.
+              for (var i in new_node.contents) {
+                throw new FS.ErrnoError(55);
+              }
+            }
+            FS.hashRemoveNode(new_node);
+          }
+          // do the internal rewiring
+          delete old_node.parent.contents[old_node.name];
+          new_dir.contents[new_name] = old_node;
+          old_node.name = new_name;
+          new_dir.ctime = new_dir.mtime = old_node.parent.ctime = old_node.parent.mtime = Date.now();
+        },
+  unlink(parent, name) {
+          delete parent.contents[name];
+          parent.ctime = parent.mtime = Date.now();
+        },
+  rmdir(parent, name) {
+          var node = FS.lookupNode(parent, name);
+          for (var i in node.contents) {
+            throw new FS.ErrnoError(55);
+          }
+          delete parent.contents[name];
+          parent.ctime = parent.mtime = Date.now();
+        },
+  readdir(node) {
+          return ['.', '..', ...Object.keys(node.contents)];
+        },
+  symlink(parent, newname, oldpath) {
+          var node = MEMFS.createNode(parent, newname, 0o777 | 40960, 0);
+          node.link = oldpath;
+          return node;
+        },
+  readlink(node) {
+          if (!FS.isLink(node.mode)) {
+            throw new FS.ErrnoError(28);
+          }
+          return node.link;
+        },
+  },
+  stream_ops:{
+  read(stream, buffer, offset, length, position) {
+          var contents = stream.node.contents;
+          if (position >= stream.node.usedBytes) return 0;
+          var size = Math.min(stream.node.usedBytes - position, length);
+          if (size > 8 && contents.subarray) { // non-trivial, and typed array
+            buffer.set(contents.subarray(position, position + size), offset);
+          } else {
+            for (var i = 0; i < size; i++) buffer[offset + i] = contents[position + i];
+          }
+          return size;
+        },
+  write(stream, buffer, offset, length, position, canOwn) {
+          // If the buffer is located in main memory (HEAP), and if
+          // memory can grow, we can't hold on to references of the
+          // memory buffer, as they may get invalidated. That means we
+          // need to do copy its contents.
+          if (buffer.buffer === HEAP8.buffer) {
+            canOwn = false;
+          }
+  
+          if (!length) return 0;
+          var node = stream.node;
+          node.mtime = node.ctime = Date.now();
+  
+          if (buffer.subarray && (!node.contents || node.contents.subarray)) { // This write is from a typed array to a typed array?
+            if (canOwn) {
+              node.contents = buffer.subarray(offset, offset + length);
+              node.usedBytes = length;
+              return length;
+            } else if (node.usedBytes === 0 && position === 0) { // If this is a simple first write to an empty file, do a fast set since we don't need to care about old data.
+              node.contents = buffer.slice(offset, offset + length);
+              node.usedBytes = length;
+              return length;
+            } else if (position + length <= node.usedBytes) { // Writing to an already allocated and used subrange of the file?
+              node.contents.set(buffer.subarray(offset, offset + length), position);
+              return length;
+            }
+          }
+  
+          // Appending to an existing file and we need to reallocate, or source data did not come as a typed array.
+          MEMFS.expandFileStorage(node, position+length);
+          if (node.contents.subarray && buffer.subarray) {
+            // Use typed array write which is available.
+            node.contents.set(buffer.subarray(offset, offset + length), position);
+          } else {
+            for (var i = 0; i < length; i++) {
+             node.contents[position + i] = buffer[offset + i]; // Or fall back to manual write if not.
+            }
+          }
+          node.usedBytes = Math.max(node.usedBytes, position + length);
+          return length;
+        },
+  llseek(stream, offset, whence) {
+          var position = offset;
+          if (whence === 1) {
+            position += stream.position;
+          } else if (whence === 2) {
+            if (FS.isFile(stream.node.mode)) {
+              position += stream.node.usedBytes;
+            }
+          }
+          if (position < 0) {
+            throw new FS.ErrnoError(28);
+          }
+          return position;
+        },
+  mmap(stream, length, position, prot, flags) {
+          if (!FS.isFile(stream.node.mode)) {
+            throw new FS.ErrnoError(43);
+          }
+          var ptr;
+          var allocated;
+          var contents = stream.node.contents;
+          // Only make a new copy when MAP_PRIVATE is specified.
+          if (!(flags & 2) && contents && contents.buffer === HEAP8.buffer) {
+            // We can't emulate MAP_SHARED when the file is not backed by the
+            // buffer we're mapping to (e.g. the HEAP buffer).
+            allocated = false;
+            ptr = contents.byteOffset;
+          } else {
+            allocated = true;
+            ptr = mmapAlloc(length);
+            if (!ptr) {
+              throw new FS.ErrnoError(48);
+            }
+            if (contents) {
+              // Try to avoid unnecessary slices.
+              if (position > 0 || position + length < contents.length) {
+                if (contents.subarray) {
+                  contents = contents.subarray(position, position + length);
+                } else {
+                  contents = Array.prototype.slice.call(contents, position, position + length);
+                }
+              }
+              HEAP8.set(contents, ptr);
+            }
+          }
+          return { ptr, allocated };
+        },
+  msync(stream, buffer, offset, length, mmapFlags) {
+          MEMFS.stream_ops.write(stream, buffer, 0, length, offset, false);
+          // should we check if bytesWritten and length are the same?
+          return 0;
+        },
+  },
+  };
+  
+  var asyncLoad = async (url) => {
+      var arrayBuffer = await readAsync(url);
+      return new Uint8Array(arrayBuffer);
+    };
+  
+  
+  var FS_createDataFile = (parent, name, fileData, canRead, canWrite, canOwn) => {
+      FS.createDataFile(parent, name, fileData, canRead, canWrite, canOwn);
+    };
+  
+  var preloadPlugins = [];
+  var FS_handledByPreloadPlugin = (byteArray, fullname, finish, onerror) => {
+      // Ensure plugins are ready.
+      if (typeof Browser != 'undefined') Browser.init();
+  
+      var handled = false;
+      preloadPlugins.forEach((plugin) => {
+        if (handled) return;
+        if (plugin['canHandle'](fullname)) {
+          plugin['handle'](byteArray, fullname, finish, onerror);
+          handled = true;
+        }
+      });
+      return handled;
+    };
+  var FS_createPreloadedFile = (parent, name, url, canRead, canWrite, onload, onerror, dontCreateFile, canOwn, preFinish) => {
+      // TODO we should allow people to just pass in a complete filename instead
+      // of parent and name being that we just join them anyways
+      var fullname = name ? PATH_FS.resolve(PATH.join2(parent, name)) : parent;
+      var dep = getUniqueRunDependency(`cp ${fullname}`); // might have several active requests for the same fullname
+      function processData(byteArray) {
+        function finish(byteArray) {
+          preFinish?.();
+          if (!dontCreateFile) {
+            FS_createDataFile(parent, name, byteArray, canRead, canWrite, canOwn);
+          }
+          onload?.();
+          removeRunDependency(dep);
+        }
+        if (FS_handledByPreloadPlugin(byteArray, fullname, finish, () => {
+          onerror?.();
+          removeRunDependency(dep);
+        })) {
+          return;
+        }
+        finish(byteArray);
+      }
+      addRunDependency(dep);
+      if (typeof url == 'string') {
+        asyncLoad(url).then(processData, onerror);
+      } else {
+        processData(url);
+      }
+    };
+  
+  var FS_modeStringToFlags = (str) => {
+      var flagModes = {
+        'r': 0,
+        'r+': 2,
+        'w': 512 | 64 | 1,
+        'w+': 512 | 64 | 2,
+        'a': 1024 | 64 | 1,
+        'a+': 1024 | 64 | 2,
+      };
+      var flags = flagModes[str];
+      if (typeof flags == 'undefined') {
+        throw new Error(`Unknown file open mode: ${str}`);
+      }
+      return flags;
+    };
+  
+  var FS_getMode = (canRead, canWrite) => {
+      var mode = 0;
+      if (canRead) mode |= 292 | 73;
+      if (canWrite) mode |= 146;
+      return mode;
+    };
+  
+  
+  
+  var FS = {
+  root:null,
+  mounts:[],
+  devices:{
+  },
+  streams:[],
+  nextInode:1,
+  nameTable:null,
+  currentPath:"/",
+  initialized:false,
+  ignorePermissions:true,
+  filesystems:null,
+  syncFSRequests:0,
+  readFiles:{
+  },
+  ErrnoError:class {
+        name = 'ErrnoError';
+        // We set the `name` property to be able to identify `FS.ErrnoError`
+        // - the `name` is a standard ECMA-262 property of error objects. Kind of good to have it anyway.
+        // - when using PROXYFS, an error can come from an underlying FS
+        // as different FS objects have their own FS.ErrnoError each,
+        // the test `err instanceof FS.ErrnoError` won't detect an error coming from another filesystem, causing bugs.
+        // we'll use the reliable test `err.name == "ErrnoError"` instead
+        constructor(errno) {
+          this.errno = errno;
+        }
+      },
+  FSStream:class {
+        shared = {};
+        get object() {
+          return this.node;
+        }
+        set object(val) {
+          this.node = val;
+        }
+        get isRead() {
+          return (this.flags & 2097155) !== 1;
+        }
+        get isWrite() {
+          return (this.flags & 2097155) !== 0;
+        }
+        get isAppend() {
+          return (this.flags & 1024);
+        }
+        get flags() {
+          return this.shared.flags;
+        }
+        set flags(val) {
+          this.shared.flags = val;
+        }
+        get position() {
+          return this.shared.position;
+        }
+        set position(val) {
+          this.shared.position = val;
+        }
+      },
+  FSNode:class {
+        node_ops = {};
+        stream_ops = {};
+        readMode = 292 | 73;
+        writeMode = 146;
+        mounted = null;
+        constructor(parent, name, mode, rdev) {
+          if (!parent) {
+            parent = this;  // root node sets parent to itself
+          }
+          this.parent = parent;
+          this.mount = parent.mount;
+          this.id = FS.nextInode++;
+          this.name = name;
+          this.mode = mode;
+          this.rdev = rdev;
+          this.atime = this.mtime = this.ctime = Date.now();
+        }
+        get read() {
+          return (this.mode & this.readMode) === this.readMode;
+        }
+        set read(val) {
+          val ? this.mode |= this.readMode : this.mode &= ~this.readMode;
+        }
+        get write() {
+          return (this.mode & this.writeMode) === this.writeMode;
+        }
+        set write(val) {
+          val ? this.mode |= this.writeMode : this.mode &= ~this.writeMode;
+        }
+        get isFolder() {
+          return FS.isDir(this.mode);
+        }
+        get isDevice() {
+          return FS.isChrdev(this.mode);
+        }
+      },
+  lookupPath(path, opts = {}) {
+        if (!path) {
+          throw new FS.ErrnoError(44);
+        }
+        opts.follow_mount ??= true
+  
+        if (!PATH.isAbs(path)) {
+          path = FS.cwd() + '/' + path;
+        }
+  
+        // limit max consecutive symlinks to 40 (SYMLOOP_MAX).
+        linkloop: for (var nlinks = 0; nlinks < 40; nlinks++) {
+          // split the absolute path
+          var parts = path.split('/').filter((p) => !!p);
+  
+          // start at the root
+          var current = FS.root;
+          var current_path = '/';
+  
+          for (var i = 0; i < parts.length; i++) {
+            var islast = (i === parts.length-1);
+            if (islast && opts.parent) {
+              // stop resolving
+              break;
+            }
+  
+            if (parts[i] === '.') {
+              continue;
+            }
+  
+            if (parts[i] === '..') {
+              current_path = PATH.dirname(current_path);
+              if (FS.isRoot(current)) {
+                path = current_path + '/' + parts.slice(i + 1).join('/');
+                continue linkloop;
+              } else {
+                current = current.parent;
+              }
+              continue;
+            }
+  
+            current_path = PATH.join2(current_path, parts[i]);
+            try {
+              current = FS.lookupNode(current, parts[i]);
+            } catch (e) {
+              // if noent_okay is true, suppress a ENOENT in the last component
+              // and return an object with an undefined node. This is needed for
+              // resolving symlinks in the path when creating a file.
+              if ((e?.errno === 44) && islast && opts.noent_okay) {
+                return { path: current_path };
+              }
+              throw e;
+            }
+  
+            // jump to the mount's root node if this is a mountpoint
+            if (FS.isMountpoint(current) && (!islast || opts.follow_mount)) {
+              current = current.mounted.root;
+            }
+  
+            // by default, lookupPath will not follow a symlink if it is the final path component.
+            // setting opts.follow = true will override this behavior.
+            if (FS.isLink(current.mode) && (!islast || opts.follow)) {
+              if (!current.node_ops.readlink) {
+                throw new FS.ErrnoError(52);
+              }
+              var link = current.node_ops.readlink(current);
+              if (!PATH.isAbs(link)) {
+                link = PATH.dirname(current_path) + '/' + link;
+              }
+              path = link + '/' + parts.slice(i + 1).join('/');
+              continue linkloop;
+            }
+          }
+          return { path: current_path, node: current };
+        }
+        throw new FS.ErrnoError(32);
+      },
+  getPath(node) {
+        var path;
+        while (true) {
+          if (FS.isRoot(node)) {
+            var mount = node.mount.mountpoint;
+            if (!path) return mount;
+            return mount[mount.length-1] !== '/' ? `${mount}/${path}` : mount + path;
+          }
+          path = path ? `${node.name}/${path}` : node.name;
+          node = node.parent;
+        }
+      },
+  hashName(parentid, name) {
+        var hash = 0;
+  
+        for (var i = 0; i < name.length; i++) {
+          hash = ((hash << 5) - hash + name.charCodeAt(i)) | 0;
+        }
+        return ((parentid + hash) >>> 0) % FS.nameTable.length;
+      },
+  hashAddNode(node) {
+        var hash = FS.hashName(node.parent.id, node.name);
+        node.name_next = FS.nameTable[hash];
+        FS.nameTable[hash] = node;
+      },
+  hashRemoveNode(node) {
+        var hash = FS.hashName(node.parent.id, node.name);
+        if (FS.nameTable[hash] === node) {
+          FS.nameTable[hash] = node.name_next;
+        } else {
+          var current = FS.nameTable[hash];
+          while (current) {
+            if (current.name_next === node) {
+              current.name_next = node.name_next;
+              break;
+            }
+            current = current.name_next;
+          }
+        }
+      },
+  lookupNode(parent, name) {
+        var errCode = FS.mayLookup(parent);
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        var hash = FS.hashName(parent.id, name);
+        for (var node = FS.nameTable[hash]; node; node = node.name_next) {
+          var nodeName = node.name;
+          if (node.parent.id === parent.id && nodeName === name) {
+            return node;
+          }
+        }
+        // if we failed to find it in the cache, call into the VFS
+        return FS.lookup(parent, name);
+      },
+  createNode(parent, name, mode, rdev) {
+        var node = new FS.FSNode(parent, name, mode, rdev);
+  
+        FS.hashAddNode(node);
+  
+        return node;
+      },
+  destroyNode(node) {
+        FS.hashRemoveNode(node);
+      },
+  isRoot(node) {
+        return node === node.parent;
+      },
+  isMountpoint(node) {
+        return !!node.mounted;
+      },
+  isFile(mode) {
+        return (mode & 61440) === 32768;
+      },
+  isDir(mode) {
+        return (mode & 61440) === 16384;
+      },
+  isLink(mode) {
+        return (mode & 61440) === 40960;
+      },
+  isChrdev(mode) {
+        return (mode & 61440) === 8192;
+      },
+  isBlkdev(mode) {
+        return (mode & 61440) === 24576;
+      },
+  isFIFO(mode) {
+        return (mode & 61440) === 4096;
+      },
+  isSocket(mode) {
+        return (mode & 49152) === 49152;
+      },
+  flagsToPermissionString(flag) {
+        var perms = ['r', 'w', 'rw'][flag & 3];
+        if ((flag & 512)) {
+          perms += 'w';
+        }
+        return perms;
+      },
+  nodePermissions(node, perms) {
+        if (FS.ignorePermissions) {
+          return 0;
+        }
+        // return 0 if any user, group or owner bits are set.
+        if (perms.includes('r') && !(node.mode & 292)) {
+          return 2;
+        } else if (perms.includes('w') && !(node.mode & 146)) {
+          return 2;
+        } else if (perms.includes('x') && !(node.mode & 73)) {
+          return 2;
+        }
+        return 0;
+      },
+  mayLookup(dir) {
+        if (!FS.isDir(dir.mode)) return 54;
+        var errCode = FS.nodePermissions(dir, 'x');
+        if (errCode) return errCode;
+        if (!dir.node_ops.lookup) return 2;
+        return 0;
+      },
+  mayCreate(dir, name) {
+        if (!FS.isDir(dir.mode)) {
+          return 54;
+        }
+        try {
+          var node = FS.lookupNode(dir, name);
+          return 20;
+        } catch (e) {
+        }
+        return FS.nodePermissions(dir, 'wx');
+      },
+  mayDelete(dir, name, isdir) {
+        var node;
+        try {
+          node = FS.lookupNode(dir, name);
+        } catch (e) {
+          return e.errno;
+        }
+        var errCode = FS.nodePermissions(dir, 'wx');
+        if (errCode) {
+          return errCode;
+        }
+        if (isdir) {
+          if (!FS.isDir(node.mode)) {
+            return 54;
+          }
+          if (FS.isRoot(node) || FS.getPath(node) === FS.cwd()) {
+            return 10;
+          }
+        } else {
+          if (FS.isDir(node.mode)) {
+            return 31;
+          }
+        }
+        return 0;
+      },
+  mayOpen(node, flags) {
+        if (!node) {
+          return 44;
+        }
+        if (FS.isLink(node.mode)) {
+          return 32;
+        } else if (FS.isDir(node.mode)) {
+          if (FS.flagsToPermissionString(flags) !== 'r' // opening for write
+              || (flags & (512 | 64))) { // TODO: check for O_SEARCH? (== search for dir only)
+            return 31;
+          }
+        }
+        return FS.nodePermissions(node, FS.flagsToPermissionString(flags));
+      },
+  checkOpExists(op, err) {
+        if (!op) {
+          throw new FS.ErrnoError(err);
+        }
+        return op;
+      },
+  MAX_OPEN_FDS:4096,
+  nextfd() {
+        for (var fd = 0; fd <= FS.MAX_OPEN_FDS; fd++) {
+          if (!FS.streams[fd]) {
+            return fd;
+          }
+        }
+        throw new FS.ErrnoError(33);
+      },
+  getStreamChecked(fd) {
+        var stream = FS.getStream(fd);
+        if (!stream) {
+          throw new FS.ErrnoError(8);
+        }
+        return stream;
+      },
+  getStream:(fd) => FS.streams[fd],
+  createStream(stream, fd = -1) {
+  
+        // clone it, so we can return an instance of FSStream
+        stream = Object.assign(new FS.FSStream(), stream);
+        if (fd == -1) {
+          fd = FS.nextfd();
+        }
+        stream.fd = fd;
+        FS.streams[fd] = stream;
+        return stream;
+      },
+  closeStream(fd) {
+        FS.streams[fd] = null;
+      },
+  dupStream(origStream, fd = -1) {
+        var stream = FS.createStream(origStream, fd);
+        stream.stream_ops?.dup?.(stream);
+        return stream;
+      },
+  doSetAttr(stream, node, attr) {
+        var setattr = stream?.stream_ops.setattr;
+        var arg = setattr ? stream : node;
+        setattr ??= node.node_ops.setattr;
+        FS.checkOpExists(setattr, 63)
+        setattr(arg, attr);
+      },
+  chrdev_stream_ops:{
+  open(stream) {
+          var device = FS.getDevice(stream.node.rdev);
+          // override node's stream ops with the device's
+          stream.stream_ops = device.stream_ops;
+          // forward the open call
+          stream.stream_ops.open?.(stream);
+        },
+  llseek() {
+          throw new FS.ErrnoError(70);
+        },
+  },
+  major:(dev) => ((dev) >> 8),
+  minor:(dev) => ((dev) & 0xff),
+  makedev:(ma, mi) => ((ma) << 8 | (mi)),
+  registerDevice(dev, ops) {
+        FS.devices[dev] = { stream_ops: ops };
+      },
+  getDevice:(dev) => FS.devices[dev],
+  getMounts(mount) {
+        var mounts = [];
+        var check = [mount];
+  
+        while (check.length) {
+          var m = check.pop();
+  
+          mounts.push(m);
+  
+          check.push(...m.mounts);
+        }
+  
+        return mounts;
+      },
+  syncfs(populate, callback) {
+        if (typeof populate == 'function') {
+          callback = populate;
+          populate = false;
+        }
+  
+        FS.syncFSRequests++;
+  
+        if (FS.syncFSRequests > 1) {
+          err(`warning: ${FS.syncFSRequests} FS.syncfs operations in flight at once, probably just doing extra work`);
+        }
+  
+        var mounts = FS.getMounts(FS.root.mount);
+        var completed = 0;
+  
+        function doCallback(errCode) {
+          FS.syncFSRequests--;
+          return callback(errCode);
+        }
+  
+        function done(errCode) {
+          if (errCode) {
+            if (!done.errored) {
+              done.errored = true;
+              return doCallback(errCode);
+            }
+            return;
+          }
+          if (++completed >= mounts.length) {
+            doCallback(null);
+          }
+        };
+  
+        // sync all mounts
+        mounts.forEach((mount) => {
+          if (!mount.type.syncfs) {
+            return done(null);
+          }
+          mount.type.syncfs(mount, populate, done);
+        });
+      },
+  mount(type, opts, mountpoint) {
+        var root = mountpoint === '/';
+        var pseudo = !mountpoint;
+        var node;
+  
+        if (root && FS.root) {
+          throw new FS.ErrnoError(10);
+        } else if (!root && !pseudo) {
+          var lookup = FS.lookupPath(mountpoint, { follow_mount: false });
+  
+          mountpoint = lookup.path;  // use the absolute path
+          node = lookup.node;
+  
+          if (FS.isMountpoint(node)) {
+            throw new FS.ErrnoError(10);
+          }
+  
+          if (!FS.isDir(node.mode)) {
+            throw new FS.ErrnoError(54);
+          }
+        }
+  
+        var mount = {
+          type,
+          opts,
+          mountpoint,
+          mounts: []
+        };
+  
+        // create a root node for the fs
+        var mountRoot = type.mount(mount);
+        mountRoot.mount = mount;
+        mount.root = mountRoot;
+  
+        if (root) {
+          FS.root = mountRoot;
+        } else if (node) {
+          // set as a mountpoint
+          node.mounted = mount;
+  
+          // add the new mount to the current mount's children
+          if (node.mount) {
+            node.mount.mounts.push(mount);
+          }
+        }
+  
+        return mountRoot;
+      },
+  unmount(mountpoint) {
+        var lookup = FS.lookupPath(mountpoint, { follow_mount: false });
+  
+        if (!FS.isMountpoint(lookup.node)) {
+          throw new FS.ErrnoError(28);
+        }
+  
+        // destroy the nodes for this mount, and all its child mounts
+        var node = lookup.node;
+        var mount = node.mounted;
+        var mounts = FS.getMounts(mount);
+  
+        Object.keys(FS.nameTable).forEach((hash) => {
+          var current = FS.nameTable[hash];
+  
+          while (current) {
+            var next = current.name_next;
+  
+            if (mounts.includes(current.mount)) {
+              FS.destroyNode(current);
+            }
+  
+            current = next;
+          }
+        });
+  
+        // no longer a mountpoint
+        node.mounted = null;
+  
+        // remove this mount from the child mounts
+        var idx = node.mount.mounts.indexOf(mount);
+        node.mount.mounts.splice(idx, 1);
+      },
+  lookup(parent, name) {
+        return parent.node_ops.lookup(parent, name);
+      },
+  mknod(path, mode, dev) {
+        var lookup = FS.lookupPath(path, { parent: true });
+        var parent = lookup.node;
+        var name = PATH.basename(path);
+        if (!name) {
+          throw new FS.ErrnoError(28);
+        }
+        if (name === '.' || name === '..') {
+          throw new FS.ErrnoError(20);
+        }
+        var errCode = FS.mayCreate(parent, name);
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        if (!parent.node_ops.mknod) {
+          throw new FS.ErrnoError(63);
+        }
+        return parent.node_ops.mknod(parent, name, mode, dev);
+      },
+  statfs(path) {
+        return FS.statfsNode(FS.lookupPath(path, {follow: true}).node);
+      },
+  statfsStream(stream) {
+        // We keep a separate statfsStream function because noderawfs overrides
+        // it. In noderawfs, stream.node is sometimes null. Instead, we need to
+        // look at stream.path.
+        return FS.statfsNode(stream.node);
+      },
+  statfsNode(node) {
+        // NOTE: None of the defaults here are true. We're just returning safe and
+        //       sane values. Currently nodefs and rawfs replace these defaults,
+        //       other file systems leave them alone.
+        var rtn = {
+          bsize: 4096,
+          frsize: 4096,
+          blocks: 1e6,
+          bfree: 5e5,
+          bavail: 5e5,
+          files: FS.nextInode,
+          ffree: FS.nextInode - 1,
+          fsid: 42,
+          flags: 2,
+          namelen: 255,
+        };
+  
+        if (node.node_ops.statfs) {
+          Object.assign(rtn, node.node_ops.statfs(node.mount.opts.root));
+        }
+        return rtn;
+      },
+  create(path, mode = 0o666) {
+        mode &= 4095;
+        mode |= 32768;
+        return FS.mknod(path, mode, 0);
+      },
+  mkdir(path, mode = 0o777) {
+        mode &= 511 | 512;
+        mode |= 16384;
+        return FS.mknod(path, mode, 0);
+      },
+  mkdirTree(path, mode) {
+        var dirs = path.split('/');
+        var d = '';
+        for (var dir of dirs) {
+          if (!dir) continue;
+          if (d || PATH.isAbs(path)) d += '/';
+          d += dir;
+          try {
+            FS.mkdir(d, mode);
+          } catch(e) {
+            if (e.errno != 20) throw e;
+          }
+        }
+      },
+  mkdev(path, mode, dev) {
+        if (typeof dev == 'undefined') {
+          dev = mode;
+          mode = 0o666;
+        }
+        mode |= 8192;
+        return FS.mknod(path, mode, dev);
+      },
+  symlink(oldpath, newpath) {
+        if (!PATH_FS.resolve(oldpath)) {
+          throw new FS.ErrnoError(44);
+        }
+        var lookup = FS.lookupPath(newpath, { parent: true });
+        var parent = lookup.node;
+        if (!parent) {
+          throw new FS.ErrnoError(44);
+        }
+        var newname = PATH.basename(newpath);
+        var errCode = FS.mayCreate(parent, newname);
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        if (!parent.node_ops.symlink) {
+          throw new FS.ErrnoError(63);
+        }
+        return parent.node_ops.symlink(parent, newname, oldpath);
+      },
+  rename(old_path, new_path) {
+        var old_dirname = PATH.dirname(old_path);
+        var new_dirname = PATH.dirname(new_path);
+        var old_name = PATH.basename(old_path);
+        var new_name = PATH.basename(new_path);
+        // parents must exist
+        var lookup, old_dir, new_dir;
+  
+        // let the errors from non existent directories percolate up
+        lookup = FS.lookupPath(old_path, { parent: true });
+        old_dir = lookup.node;
+        lookup = FS.lookupPath(new_path, { parent: true });
+        new_dir = lookup.node;
+  
+        if (!old_dir || !new_dir) throw new FS.ErrnoError(44);
+        // need to be part of the same mount
+        if (old_dir.mount !== new_dir.mount) {
+          throw new FS.ErrnoError(75);
+        }
+        // source must exist
+        var old_node = FS.lookupNode(old_dir, old_name);
+        // old path should not be an ancestor of the new path
+        var relative = PATH_FS.relative(old_path, new_dirname);
+        if (relative.charAt(0) !== '.') {
+          throw new FS.ErrnoError(28);
+        }
+        // new path should not be an ancestor of the old path
+        relative = PATH_FS.relative(new_path, old_dirname);
+        if (relative.charAt(0) !== '.') {
+          throw new FS.ErrnoError(55);
+        }
+        // see if the new path already exists
+        var new_node;
+        try {
+          new_node = FS.lookupNode(new_dir, new_name);
+        } catch (e) {
+          // not fatal
+        }
+        // early out if nothing needs to change
+        if (old_node === new_node) {
+          return;
+        }
+        // we'll need to delete the old entry
+        var isdir = FS.isDir(old_node.mode);
+        var errCode = FS.mayDelete(old_dir, old_name, isdir);
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        // need delete permissions if we'll be overwriting.
+        // need create permissions if new doesn't already exist.
+        errCode = new_node ?
+          FS.mayDelete(new_dir, new_name, isdir) :
+          FS.mayCreate(new_dir, new_name);
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        if (!old_dir.node_ops.rename) {
+          throw new FS.ErrnoError(63);
+        }
+        if (FS.isMountpoint(old_node) || (new_node && FS.isMountpoint(new_node))) {
+          throw new FS.ErrnoError(10);
+        }
+        // if we are going to change the parent, check write permissions
+        if (new_dir !== old_dir) {
+          errCode = FS.nodePermissions(old_dir, 'w');
+          if (errCode) {
+            throw new FS.ErrnoError(errCode);
+          }
+        }
+        // remove the node from the lookup hash
+        FS.hashRemoveNode(old_node);
+        // do the underlying fs rename
+        try {
+          old_dir.node_ops.rename(old_node, new_dir, new_name);
+          // update old node (we do this here to avoid each backend
+          // needing to)
+          old_node.parent = new_dir;
+        } catch (e) {
+          throw e;
+        } finally {
+          // add the node back to the hash (in case node_ops.rename
+          // changed its name)
+          FS.hashAddNode(old_node);
+        }
+      },
+  rmdir(path) {
+        var lookup = FS.lookupPath(path, { parent: true });
+        var parent = lookup.node;
+        var name = PATH.basename(path);
+        var node = FS.lookupNode(parent, name);
+        var errCode = FS.mayDelete(parent, name, true);
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        if (!parent.node_ops.rmdir) {
+          throw new FS.ErrnoError(63);
+        }
+        if (FS.isMountpoint(node)) {
+          throw new FS.ErrnoError(10);
+        }
+        parent.node_ops.rmdir(parent, name);
+        FS.destroyNode(node);
+      },
+  readdir(path) {
+        var lookup = FS.lookupPath(path, { follow: true });
+        var node = lookup.node;
+        var readdir = FS.checkOpExists(node.node_ops.readdir, 54);
+        return readdir(node);
+      },
+  unlink(path) {
+        var lookup = FS.lookupPath(path, { parent: true });
+        var parent = lookup.node;
+        if (!parent) {
+          throw new FS.ErrnoError(44);
+        }
+        var name = PATH.basename(path);
+        var node = FS.lookupNode(parent, name);
+        var errCode = FS.mayDelete(parent, name, false);
+        if (errCode) {
+          // According to POSIX, we should map EISDIR to EPERM, but
+          // we instead do what Linux does (and we must, as we use
+          // the musl linux libc).
+          throw new FS.ErrnoError(errCode);
+        }
+        if (!parent.node_ops.unlink) {
+          throw new FS.ErrnoError(63);
+        }
+        if (FS.isMountpoint(node)) {
+          throw new FS.ErrnoError(10);
+        }
+        parent.node_ops.unlink(parent, name);
+        FS.destroyNode(node);
+      },
+  readlink(path) {
+        var lookup = FS.lookupPath(path);
+        var link = lookup.node;
+        if (!link) {
+          throw new FS.ErrnoError(44);
+        }
+        if (!link.node_ops.readlink) {
+          throw new FS.ErrnoError(28);
+        }
+        return link.node_ops.readlink(link);
+      },
+  stat(path, dontFollow) {
+        var lookup = FS.lookupPath(path, { follow: !dontFollow });
+        var node = lookup.node;
+        var getattr = FS.checkOpExists(node.node_ops.getattr, 63);
+        return getattr(node);
+      },
+  fstat(fd) {
+        var stream = FS.getStreamChecked(fd);
+        var node = stream.node;
+        var getattr = stream.stream_ops.getattr;
+        var arg = getattr ? stream : node;
+        getattr ??= node.node_ops.getattr;
+        FS.checkOpExists(getattr, 63)
+        return getattr(arg);
+      },
+  lstat(path) {
+        return FS.stat(path, true);
+      },
+  doChmod(stream, node, mode, dontFollow) {
+        FS.doSetAttr(stream, node, {
+          mode: (mode & 4095) | (node.mode & ~4095),
+          ctime: Date.now(),
+          dontFollow
+        });
+      },
+  chmod(path, mode, dontFollow) {
+        var node;
+        if (typeof path == 'string') {
+          var lookup = FS.lookupPath(path, { follow: !dontFollow });
+          node = lookup.node;
+        } else {
+          node = path;
+        }
+        FS.doChmod(null, node, mode, dontFollow);
+      },
+  lchmod(path, mode) {
+        FS.chmod(path, mode, true);
+      },
+  fchmod(fd, mode) {
+        var stream = FS.getStreamChecked(fd);
+        FS.doChmod(stream, stream.node, mode, false);
+      },
+  doChown(stream, node, dontFollow) {
+        FS.doSetAttr(stream, node, {
+          timestamp: Date.now(),
+          dontFollow
+          // we ignore the uid / gid for now
+        });
+      },
+  chown(path, uid, gid, dontFollow) {
+        var node;
+        if (typeof path == 'string') {
+          var lookup = FS.lookupPath(path, { follow: !dontFollow });
+          node = lookup.node;
+        } else {
+          node = path;
+        }
+        FS.doChown(null, node, dontFollow);
+      },
+  lchown(path, uid, gid) {
+        FS.chown(path, uid, gid, true);
+      },
+  fchown(fd, uid, gid) {
+        var stream = FS.getStreamChecked(fd);
+        FS.doChown(stream, stream.node, false);
+      },
+  doTruncate(stream, node, len) {
+        if (FS.isDir(node.mode)) {
+          throw new FS.ErrnoError(31);
+        }
+        if (!FS.isFile(node.mode)) {
+          throw new FS.ErrnoError(28);
+        }
+        var errCode = FS.nodePermissions(node, 'w');
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        FS.doSetAttr(stream, node, {
+          size: len,
+          timestamp: Date.now()
+        });
+      },
+  truncate(path, len) {
+        if (len < 0) {
+          throw new FS.ErrnoError(28);
+        }
+        var node;
+        if (typeof path == 'string') {
+          var lookup = FS.lookupPath(path, { follow: true });
+          node = lookup.node;
+        } else {
+          node = path;
+        }
+        FS.doTruncate(null, node, len);
+      },
+  ftruncate(fd, len) {
+        var stream = FS.getStreamChecked(fd);
+        if (len < 0 || (stream.flags & 2097155) === 0) {
+          throw new FS.ErrnoError(28);
+        }
+        FS.doTruncate(stream, stream.node, len);
+      },
+  utime(path, atime, mtime) {
+        var lookup = FS.lookupPath(path, { follow: true });
+        var node = lookup.node;
+        var setattr = FS.checkOpExists(node.node_ops.setattr, 63);
+        setattr(node, {
+          atime: atime,
+          mtime: mtime
+        });
+      },
+  open(path, flags, mode = 0o666) {
+        if (path === "") {
+          throw new FS.ErrnoError(44);
+        }
+        flags = typeof flags == 'string' ? FS_modeStringToFlags(flags) : flags;
+        if ((flags & 64)) {
+          mode = (mode & 4095) | 32768;
+        } else {
+          mode = 0;
+        }
+        var node;
+        var isDirPath;
+        if (typeof path == 'object') {
+          node = path;
+        } else {
+          isDirPath = path.endsWith("/");
+          // noent_okay makes it so that if the final component of the path
+          // doesn't exist, lookupPath returns `node: undefined`. `path` will be
+          // updated to point to the target of all symlinks.
+          var lookup = FS.lookupPath(path, {
+            follow: !(flags & 131072),
+            noent_okay: true
+          });
+          node = lookup.node;
+          path = lookup.path;
+        }
+        // perhaps we need to create the node
+        var created = false;
+        if ((flags & 64)) {
+          if (node) {
+            // if O_CREAT and O_EXCL are set, error out if the node already exists
+            if ((flags & 128)) {
+              throw new FS.ErrnoError(20);
+            }
+          } else if (isDirPath) {
+            throw new FS.ErrnoError(31);
+          } else {
+            // node doesn't exist, try to create it
+            // Ignore the permission bits here to ensure we can `open` this new
+            // file below. We use chmod below the apply the permissions once the
+            // file is open.
+            node = FS.mknod(path, mode | 0o777, 0);
+            created = true;
+          }
+        }
+        if (!node) {
+          throw new FS.ErrnoError(44);
+        }
+        // can't truncate a device
+        if (FS.isChrdev(node.mode)) {
+          flags &= ~512;
+        }
+        // if asked only for a directory, then this must be one
+        if ((flags & 65536) && !FS.isDir(node.mode)) {
+          throw new FS.ErrnoError(54);
+        }
+        // check permissions, if this is not a file we just created now (it is ok to
+        // create and write to a file with read-only permissions; it is read-only
+        // for later use)
+        if (!created) {
+          var errCode = FS.mayOpen(node, flags);
+          if (errCode) {
+            throw new FS.ErrnoError(errCode);
+          }
+        }
+        // do truncation if necessary
+        if ((flags & 512) && !created) {
+          FS.truncate(node, 0);
+        }
+        // we've already handled these, don't pass down to the underlying vfs
+        flags &= ~(128 | 512 | 131072);
+  
+        // register the stream with the filesystem
+        var stream = FS.createStream({
+          node,
+          path: FS.getPath(node),  // we want the absolute path to the node
+          flags,
+          seekable: true,
+          position: 0,
+          stream_ops: node.stream_ops,
+          // used by the file family libc calls (fopen, fwrite, ferror, etc.)
+          ungotten: [],
+          error: false
+        });
+        // call the new stream's open function
+        if (stream.stream_ops.open) {
+          stream.stream_ops.open(stream);
+        }
+        if (created) {
+          FS.chmod(node, mode & 0o777);
+        }
+        if (Module['logReadFiles'] && !(flags & 1)) {
+          if (!(path in FS.readFiles)) {
+            FS.readFiles[path] = 1;
+          }
+        }
+        return stream;
+      },
+  close(stream) {
+        if (FS.isClosed(stream)) {
+          throw new FS.ErrnoError(8);
+        }
+        if (stream.getdents) stream.getdents = null; // free readdir state
+        try {
+          if (stream.stream_ops.close) {
+            stream.stream_ops.close(stream);
+          }
+        } catch (e) {
+          throw e;
+        } finally {
+          FS.closeStream(stream.fd);
+        }
+        stream.fd = null;
+      },
+  isClosed(stream) {
+        return stream.fd === null;
+      },
+  llseek(stream, offset, whence) {
+        if (FS.isClosed(stream)) {
+          throw new FS.ErrnoError(8);
+        }
+        if (!stream.seekable || !stream.stream_ops.llseek) {
+          throw new FS.ErrnoError(70);
+        }
+        if (whence != 0 && whence != 1 && whence != 2) {
+          throw new FS.ErrnoError(28);
+        }
+        stream.position = stream.stream_ops.llseek(stream, offset, whence);
+        stream.ungotten = [];
+        return stream.position;
+      },
+  read(stream, buffer, offset, length, position) {
+        if (length < 0 || position < 0) {
+          throw new FS.ErrnoError(28);
+        }
+        if (FS.isClosed(stream)) {
+          throw new FS.ErrnoError(8);
+        }
+        if ((stream.flags & 2097155) === 1) {
+          throw new FS.ErrnoError(8);
+        }
+        if (FS.isDir(stream.node.mode)) {
+          throw new FS.ErrnoError(31);
+        }
+        if (!stream.stream_ops.read) {
+          throw new FS.ErrnoError(28);
+        }
+        var seeking = typeof position != 'undefined';
+        if (!seeking) {
+          position = stream.position;
+        } else if (!stream.seekable) {
+          throw new FS.ErrnoError(70);
+        }
+        var bytesRead = stream.stream_ops.read(stream, buffer, offset, length, position);
+        if (!seeking) stream.position += bytesRead;
+        return bytesRead;
+      },
+  write(stream, buffer, offset, length, position, canOwn) {
+        if (length < 0 || position < 0) {
+          throw new FS.ErrnoError(28);
+        }
+        if (FS.isClosed(stream)) {
+          throw new FS.ErrnoError(8);
+        }
+        if ((stream.flags & 2097155) === 0) {
+          throw new FS.ErrnoError(8);
+        }
+        if (FS.isDir(stream.node.mode)) {
+          throw new FS.ErrnoError(31);
+        }
+        if (!stream.stream_ops.write) {
+          throw new FS.ErrnoError(28);
+        }
+        if (stream.seekable && stream.flags & 1024) {
+          // seek to the end before writing in append mode
+          FS.llseek(stream, 0, 2);
+        }
+        var seeking = typeof position != 'undefined';
+        if (!seeking) {
+          position = stream.position;
+        } else if (!stream.seekable) {
+          throw new FS.ErrnoError(70);
+        }
+        var bytesWritten = stream.stream_ops.write(stream, buffer, offset, length, position, canOwn);
+        if (!seeking) stream.position += bytesWritten;
+        return bytesWritten;
+      },
+  mmap(stream, length, position, prot, flags) {
+        // User requests writing to file (prot & PROT_WRITE != 0).
+        // Checking if we have permissions to write to the file unless
+        // MAP_PRIVATE flag is set. According to POSIX spec it is possible
+        // to write to file opened in read-only mode with MAP_PRIVATE flag,
+        // as all modifications will be visible only in the memory of
+        // the current process.
+        if ((prot & 2) !== 0
+            && (flags & 2) === 0
+            && (stream.flags & 2097155) !== 2) {
+          throw new FS.ErrnoError(2);
+        }
+        if ((stream.flags & 2097155) === 1) {
+          throw new FS.ErrnoError(2);
+        }
+        if (!stream.stream_ops.mmap) {
+          throw new FS.ErrnoError(43);
+        }
+        if (!length) {
+          throw new FS.ErrnoError(28);
+        }
+        return stream.stream_ops.mmap(stream, length, position, prot, flags);
+      },
+  msync(stream, buffer, offset, length, mmapFlags) {
+        if (!stream.stream_ops.msync) {
+          return 0;
+        }
+        return stream.stream_ops.msync(stream, buffer, offset, length, mmapFlags);
+      },
+  ioctl(stream, cmd, arg) {
+        if (!stream.stream_ops.ioctl) {
+          throw new FS.ErrnoError(59);
+        }
+        return stream.stream_ops.ioctl(stream, cmd, arg);
+      },
+  readFile(path, opts = {}) {
+        opts.flags = opts.flags || 0;
+        opts.encoding = opts.encoding || 'binary';
+        if (opts.encoding !== 'utf8' && opts.encoding !== 'binary') {
+          throw new Error(`Invalid encoding type "${opts.encoding}"`);
+        }
+        var ret;
+        var stream = FS.open(path, opts.flags);
+        var stat = FS.stat(path);
+        var length = stat.size;
+        var buf = new Uint8Array(length);
+        FS.read(stream, buf, 0, length, 0);
+        if (opts.encoding === 'utf8') {
+          ret = UTF8ArrayToString(buf);
+        } else if (opts.encoding === 'binary') {
+          ret = buf;
+        }
+        FS.close(stream);
+        return ret;
+      },
+  writeFile(path, data, opts = {}) {
+        opts.flags = opts.flags || 577;
+        var stream = FS.open(path, opts.flags, opts.mode);
+        if (typeof data == 'string') {
+          var buf = new Uint8Array(lengthBytesUTF8(data)+1);
+          var actualNumBytes = stringToUTF8Array(data, buf, 0, buf.length);
+          FS.write(stream, buf, 0, actualNumBytes, undefined, opts.canOwn);
+        } else if (ArrayBuffer.isView(data)) {
+          FS.write(stream, data, 0, data.byteLength, undefined, opts.canOwn);
+        } else {
+          throw new Error('Unsupported data type');
+        }
+        FS.close(stream);
+      },
+  cwd:() => FS.currentPath,
+  chdir(path) {
+        var lookup = FS.lookupPath(path, { follow: true });
+        if (lookup.node === null) {
+          throw new FS.ErrnoError(44);
+        }
+        if (!FS.isDir(lookup.node.mode)) {
+          throw new FS.ErrnoError(54);
+        }
+        var errCode = FS.nodePermissions(lookup.node, 'x');
+        if (errCode) {
+          throw new FS.ErrnoError(errCode);
+        }
+        FS.currentPath = lookup.path;
+      },
+  createDefaultDirectories() {
+        FS.mkdir('/tmp');
+        FS.mkdir('/home');
+        FS.mkdir('/home/web_user');
+      },
+  createDefaultDevices() {
+        // create /dev
+        FS.mkdir('/dev');
+        // setup /dev/null
+        FS.registerDevice(FS.makedev(1, 3), {
+          read: () => 0,
+          write: (stream, buffer, offset, length, pos) => length,
+          llseek: () => 0,
+        });
+        FS.mkdev('/dev/null', FS.makedev(1, 3));
+        // setup /dev/tty and /dev/tty1
+        // stderr needs to print output using err() rather than out()
+        // so we register a second tty just for it.
+        TTY.register(FS.makedev(5, 0), TTY.default_tty_ops);
+        TTY.register(FS.makedev(6, 0), TTY.default_tty1_ops);
+        FS.mkdev('/dev/tty', FS.makedev(5, 0));
+        FS.mkdev('/dev/tty1', FS.makedev(6, 0));
+        // setup /dev/[u]random
+        // use a buffer to avoid overhead of individual crypto calls per byte
+        var randomBuffer = new Uint8Array(1024), randomLeft = 0;
+        var randomByte = () => {
+          if (randomLeft === 0) {
+            randomFill(randomBuffer);
+            randomLeft = randomBuffer.byteLength;
+          }
+          return randomBuffer[--randomLeft];
+        };
+        FS.createDevice('/dev', 'random', randomByte);
+        FS.createDevice('/dev', 'urandom', randomByte);
+        // we're not going to emulate the actual shm device,
+        // just create the tmp dirs that reside in it commonly
+        FS.mkdir('/dev/shm');
+        FS.mkdir('/dev/shm/tmp');
+      },
+  createSpecialDirectories() {
+        // create /proc/self/fd which allows /proc/self/fd/6 => readlink gives the
+        // name of the stream for fd 6 (see test_unistd_ttyname)
+        FS.mkdir('/proc');
+        var proc_self = FS.mkdir('/proc/self');
+        FS.mkdir('/proc/self/fd');
+        FS.mount({
+          mount() {
+            var node = FS.createNode(proc_self, 'fd', 16895, 73);
+            node.stream_ops = {
+              llseek: MEMFS.stream_ops.llseek,
+            };
+            node.node_ops = {
+              lookup(parent, name) {
+                var fd = +name;
+                var stream = FS.getStreamChecked(fd);
+                var ret = {
+                  parent: null,
+                  mount: { mountpoint: 'fake' },
+                  node_ops: { readlink: () => stream.path },
+                  id: fd + 1,
+                };
+                ret.parent = ret; // make it look like a simple root node
+                return ret;
+              },
+              readdir() {
+                return Array.from(FS.streams.entries())
+                  .filter(([k, v]) => v)
+                  .map(([k, v]) => k.toString());
+              }
+            };
+            return node;
+          }
+        }, {}, '/proc/self/fd');
+      },
+  createStandardStreams(input, output, error) {
+        // TODO deprecate the old functionality of a single
+        // input / output callback and that utilizes FS.createDevice
+        // and instead require a unique set of stream ops
+  
+        // by default, we symlink the standard streams to the
+        // default tty devices. however, if the standard streams
+        // have been overwritten we create a unique device for
+        // them instead.
+        if (input) {
+          FS.createDevice('/dev', 'stdin', input);
+        } else {
+          FS.symlink('/dev/tty', '/dev/stdin');
+        }
+        if (output) {
+          FS.createDevice('/dev', 'stdout', null, output);
+        } else {
+          FS.symlink('/dev/tty', '/dev/stdout');
+        }
+        if (error) {
+          FS.createDevice('/dev', 'stderr', null, error);
+        } else {
+          FS.symlink('/dev/tty1', '/dev/stderr');
+        }
+  
+        // open default streams for the stdin, stdout and stderr devices
+        var stdin = FS.open('/dev/stdin', 0);
+        var stdout = FS.open('/dev/stdout', 1);
+        var stderr = FS.open('/dev/stderr', 1);
+      },
+  staticInit() {
+        FS.nameTable = new Array(4096);
+  
+        FS.mount(MEMFS, {}, '/');
+  
+        FS.createDefaultDirectories();
+        FS.createDefaultDevices();
+        FS.createSpecialDirectories();
+  
+        FS.filesystems = {
+          'MEMFS': MEMFS,
+        };
+      },
+  init(input, output, error) {
+        FS.initialized = true;
+  
+        // Allow Module.stdin etc. to provide defaults, if none explicitly passed to us here
+        input ??= Module['stdin'];
+        output ??= Module['stdout'];
+        error ??= Module['stderr'];
+  
+        FS.createStandardStreams(input, output, error);
+      },
+  quit() {
+        FS.initialized = false;
+        // force-flush all streams, so we get musl std streams printed out
+        // close all of our streams
+        for (var stream of FS.streams) {
+          if (stream) {
+            FS.close(stream);
+          }
+        }
+      },
+  findObject(path, dontResolveLastLink) {
+        var ret = FS.analyzePath(path, dontResolveLastLink);
+        if (!ret.exists) {
+          return null;
+        }
+        return ret.object;
+      },
+  analyzePath(path, dontResolveLastLink) {
+        // operate from within the context of the symlink's target
+        try {
+          var lookup = FS.lookupPath(path, { follow: !dontResolveLastLink });
+          path = lookup.path;
+        } catch (e) {
+        }
+        var ret = {
+          isRoot: false, exists: false, error: 0, name: null, path: null, object: null,
+          parentExists: false, parentPath: null, parentObject: null
+        };
+        try {
+          var lookup = FS.lookupPath(path, { parent: true });
+          ret.parentExists = true;
+          ret.parentPath = lookup.path;
+          ret.parentObject = lookup.node;
+          ret.name = PATH.basename(path);
+          lookup = FS.lookupPath(path, { follow: !dontResolveLastLink });
+          ret.exists = true;
+          ret.path = lookup.path;
+          ret.object = lookup.node;
+          ret.name = lookup.node.name;
+          ret.isRoot = lookup.path === '/';
+        } catch (e) {
+          ret.error = e.errno;
+        };
+        return ret;
+      },
+  createPath(parent, path, canRead, canWrite) {
+        parent = typeof parent == 'string' ? parent : FS.getPath(parent);
+        var parts = path.split('/').reverse();
+        while (parts.length) {
+          var part = parts.pop();
+          if (!part) continue;
+          var current = PATH.join2(parent, part);
+          try {
+            FS.mkdir(current);
+          } catch (e) {
+            if (e.errno != 20) throw e;
+          }
+          parent = current;
+        }
+        return current;
+      },
+  createFile(parent, name, properties, canRead, canWrite) {
+        var path = PATH.join2(typeof parent == 'string' ? parent : FS.getPath(parent), name);
+        var mode = FS_getMode(canRead, canWrite);
+        return FS.create(path, mode);
+      },
+  createDataFile(parent, name, data, canRead, canWrite, canOwn) {
+        var path = name;
+        if (parent) {
+          parent = typeof parent == 'string' ? parent : FS.getPath(parent);
+          path = name ? PATH.join2(parent, name) : parent;
+        }
+        var mode = FS_getMode(canRead, canWrite);
+        var node = FS.create(path, mode);
+        if (data) {
+          if (typeof data == 'string') {
+            var arr = new Array(data.length);
+            for (var i = 0, len = data.length; i < len; ++i) arr[i] = data.charCodeAt(i);
+            data = arr;
+          }
+          // make sure we can write to the file
+          FS.chmod(node, mode | 146);
+          var stream = FS.open(node, 577);
+          FS.write(stream, data, 0, data.length, 0, canOwn);
+          FS.close(stream);
+          FS.chmod(node, mode);
+        }
+      },
+  createDevice(parent, name, input, output) {
+        var path = PATH.join2(typeof parent == 'string' ? parent : FS.getPath(parent), name);
+        var mode = FS_getMode(!!input, !!output);
+        FS.createDevice.major ??= 64;
+        var dev = FS.makedev(FS.createDevice.major++, 0);
+        // Create a fake device that a set of stream ops to emulate
+        // the old behavior.
+        FS.registerDevice(dev, {
+          open(stream) {
+            stream.seekable = false;
+          },
+          close(stream) {
+            // flush any pending line data
+            if (output?.buffer?.length) {
+              output(10);
+            }
+          },
+          read(stream, buffer, offset, length, pos /* ignored */) {
+            var bytesRead = 0;
+            for (var i = 0; i < length; i++) {
+              var result;
+              try {
+                result = input();
+              } catch (e) {
+                throw new FS.ErrnoError(29);
+              }
+              if (result === undefined && bytesRead === 0) {
+                throw new FS.ErrnoError(6);
+              }
+              if (result === null || result === undefined) break;
+              bytesRead++;
+              buffer[offset+i] = result;
+            }
+            if (bytesRead) {
+              stream.node.atime = Date.now();
+            }
+            return bytesRead;
+          },
+          write(stream, buffer, offset, length, pos) {
+            for (var i = 0; i < length; i++) {
+              try {
+                output(buffer[offset+i]);
+              } catch (e) {
+                throw new FS.ErrnoError(29);
+              }
+            }
+            if (length) {
+              stream.node.mtime = stream.node.ctime = Date.now();
+            }
+            return i;
+          }
+        });
+        return FS.mkdev(path, mode, dev);
+      },
+  forceLoadFile(obj) {
+        if (obj.isDevice || obj.isFolder || obj.link || obj.contents) return true;
+        if (typeof XMLHttpRequest != 'undefined') {
+          throw new Error("Lazy loading should have been performed (contents set) in createLazyFile, but it was not. Lazy loading only works in web workers. Use --embed-file or --preload-file in emcc on the main thread.");
+        } else { // Command-line.
+          try {
+            obj.contents = readBinary(obj.url);
+            obj.usedBytes = obj.contents.length;
+          } catch (e) {
+            throw new FS.ErrnoError(29);
+          }
+        }
+      },
+  createLazyFile(parent, name, url, canRead, canWrite) {
+        // Lazy chunked Uint8Array (implements get and length from Uint8Array).
+        // Actual getting is abstracted away for eventual reuse.
+        class LazyUint8Array {
+          lengthKnown = false;
+          chunks = []; // Loaded chunks. Index is the chunk number
+          get(idx) {
+            if (idx > this.length-1 || idx < 0) {
+              return undefined;
+            }
+            var chunkOffset = idx % this.chunkSize;
+            var chunkNum = (idx / this.chunkSize)|0;
+            return this.getter(chunkNum)[chunkOffset];
+          }
+          setDataGetter(getter) {
+            this.getter = getter;
+          }
+          cacheLength() {
+            // Find length
+            var xhr = new XMLHttpRequest();
+            xhr.open('HEAD', url, false);
+            xhr.send(null);
+            if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status);
+            var datalength = Number(xhr.getResponseHeader("Content-length"));
+            var header;
+            var hasByteServing = (header = xhr.getResponseHeader("Accept-Ranges")) && header === "bytes";
+            var usesGzip = (header = xhr.getResponseHeader("Content-Encoding")) && header === "gzip";
+  
+            var chunkSize = 1024*1024; // Chunk size in bytes
+  
+            if (!hasByteServing) chunkSize = datalength;
+  
+            // Function to get a range from the remote URL.
+            var doXHR = (from, to) => {
+              if (from > to) throw new Error("invalid range (" + from + ", " + to + ") or no bytes requested!");
+              if (to > datalength-1) throw new Error("only " + datalength + " bytes available! programmer error!");
+  
+              // TODO: Use mozResponseArrayBuffer, responseStream, etc. if available.
+              var xhr = new XMLHttpRequest();
+              xhr.open('GET', url, false);
+              if (datalength !== chunkSize) xhr.setRequestHeader("Range", "bytes=" + from + "-" + to);
+  
+              // Some hints to the browser that we want binary data.
+              xhr.responseType = 'arraybuffer';
+              if (xhr.overrideMimeType) {
+                xhr.overrideMimeType('text/plain; charset=x-user-defined');
+              }
+  
+              xhr.send(null);
+              if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status);
+              if (xhr.response !== undefined) {
+                return new Uint8Array(/** @type{Array<number>} */(xhr.response || []));
+              }
+              return intArrayFromString(xhr.responseText || '', true);
+            };
+            var lazyArray = this;
+            lazyArray.setDataGetter((chunkNum) => {
+              var start = chunkNum * chunkSize;
+              var end = (chunkNum+1) * chunkSize - 1; // including this byte
+              end = Math.min(end, datalength-1); // if datalength-1 is selected, this is the last block
+              if (typeof lazyArray.chunks[chunkNum] == 'undefined') {
+                lazyArray.chunks[chunkNum] = doXHR(start, end);
+              }
+              if (typeof lazyArray.chunks[chunkNum] == 'undefined') throw new Error('doXHR failed!');
+              return lazyArray.chunks[chunkNum];
+            });
+  
+            if (usesGzip || !datalength) {
+              // if the server uses gzip or doesn't supply the length, we have to download the whole file to get the (uncompressed) length
+              chunkSize = datalength = 1; // this will force getter(0)/doXHR do download the whole file
+              datalength = this.getter(0).length;
+              chunkSize = datalength;
+              out("LazyFiles on gzip forces download of the whole file when length is accessed");
+            }
+  
+            this._length = datalength;
+            this._chunkSize = chunkSize;
+            this.lengthKnown = true;
+          }
+          get length() {
+            if (!this.lengthKnown) {
+              this.cacheLength();
+            }
+            return this._length;
+          }
+          get chunkSize() {
+            if (!this.lengthKnown) {
+              this.cacheLength();
+            }
+            return this._chunkSize;
+          }
+        }
+  
+        if (typeof XMLHttpRequest != 'undefined') {
+          if (!ENVIRONMENT_IS_WORKER) throw 'Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc';
+          var lazyArray = new LazyUint8Array();
+          var properties = { isDevice: false, contents: lazyArray };
+        } else {
+          var properties = { isDevice: false, url: url };
+        }
+  
+        var node = FS.createFile(parent, name, properties, canRead, canWrite);
+        // This is a total hack, but I want to get this lazy file code out of the
+        // core of MEMFS. If we want to keep this lazy file concept I feel it should
+        // be its own thin LAZYFS proxying calls to MEMFS.
+        if (properties.contents) {
+          node.contents = properties.contents;
+        } else if (properties.url) {
+          node.contents = null;
+          node.url = properties.url;
+        }
+        // Add a function that defers querying the file size until it is asked the first time.
+        Object.defineProperties(node, {
+          usedBytes: {
+            get: function() { return this.contents.length; }
+          }
+        });
+        // override each stream op with one that tries to force load the lazy file first
+        var stream_ops = {};
+        var keys = Object.keys(node.stream_ops);
+        keys.forEach((key) => {
+          var fn = node.stream_ops[key];
+          stream_ops[key] = (...args) => {
+            FS.forceLoadFile(node);
+            return fn(...args);
+          };
+        });
+        function writeChunks(stream, buffer, offset, length, position) {
+          var contents = stream.node.contents;
+          if (position >= contents.length)
+            return 0;
+          var size = Math.min(contents.length - position, length);
+          if (contents.slice) { // normal array
+            for (var i = 0; i < size; i++) {
+              buffer[offset + i] = contents[position + i];
+            }
+          } else {
+            for (var i = 0; i < size; i++) { // LazyUint8Array from sync binary XHR
+              buffer[offset + i] = contents.get(position + i);
+            }
+          }
+          return size;
+        }
+        // use a custom read function
+        stream_ops.read = (stream, buffer, offset, length, position) => {
+          FS.forceLoadFile(node);
+          return writeChunks(stream, buffer, offset, length, position)
+        };
+        // use a custom mmap function
+        stream_ops.mmap = (stream, length, position, prot, flags) => {
+          FS.forceLoadFile(node);
+          var ptr = mmapAlloc(length);
+          if (!ptr) {
+            throw new FS.ErrnoError(48);
+          }
+          writeChunks(stream, HEAP8, ptr, length, position);
+          return { ptr, allocated: true };
+        };
+        node.stream_ops = stream_ops;
+        return node;
+      },
+  };
+  var SOCKFS = {
+  websocketArgs:{
+  },
+  callbacks:{
+  },
+  on(event, callback) {
+        SOCKFS.callbacks[event] = callback;
+      },
+  emit(event, param) {
+        SOCKFS.callbacks[event]?.(param);
+      },
+  mount(mount) {
+        // The incomming Module['websocket'] can be used for configuring 
+        // configuring subprotocol/url, etc
+        SOCKFS.websocketArgs = Module['websocket'] || {};
+        // Add the Event registration mechanism to the exported websocket configuration
+        // object so we can register network callbacks from native JavaScript too.
+        // For more documentation see system/include/emscripten/emscripten.h
+        (Module['websocket'] ??= {})['on'] = SOCKFS.on;
+  
+        return FS.createNode(null, '/', 16895, 0);
+      },
+  createSocket(family, type, protocol) {
+        type &= ~526336; // Some applications may pass it; it makes no sense for a single process.
+        var streaming = type == 1;
+        if (streaming && protocol && protocol != 6) {
+          throw new FS.ErrnoError(66); // if SOCK_STREAM, must be tcp or 0.
+        }
+  
+        // create our internal socket structure
+        var sock = {
+          family,
+          type,
+          protocol,
+          server: null,
+          error: null, // Used in getsockopt for SOL_SOCKET/SO_ERROR test
+          peers: {},
+          pending: [],
+          recv_queue: [],
+          sock_ops: SOCKFS.websocket_sock_ops
+        };
+  
+        // create the filesystem node to store the socket structure
+        var name = SOCKFS.nextname();
+        var node = FS.createNode(SOCKFS.root, name, 49152, 0);
+        node.sock = sock;
+  
+        // and the wrapping stream that enables library functions such
+        // as read and write to indirectly interact with the socket
+        var stream = FS.createStream({
+          path: name,
+          node,
+          flags: 2,
+          seekable: false,
+          stream_ops: SOCKFS.stream_ops
+        });
+  
+        // map the new stream to the socket structure (sockets have a 1:1
+        // relationship with a stream)
+        sock.stream = stream;
+  
+        return sock;
+      },
+  getSocket(fd) {
+        var stream = FS.getStream(fd);
+        if (!stream || !FS.isSocket(stream.node.mode)) {
+          return null;
+        }
+        return stream.node.sock;
+      },
+  stream_ops:{
+  poll(stream) {
+          var sock = stream.node.sock;
+          return sock.sock_ops.poll(sock);
+        },
+  ioctl(stream, request, varargs) {
+          var sock = stream.node.sock;
+          return sock.sock_ops.ioctl(sock, request, varargs);
+        },
+  read(stream, buffer, offset, length, position /* ignored */) {
+          var sock = stream.node.sock;
+          var msg = sock.sock_ops.recvmsg(sock, length);
+          if (!msg) {
+            // socket is closed
+            return 0;
+          }
+          buffer.set(msg.buffer, offset);
+          return msg.buffer.length;
+        },
+  write(stream, buffer, offset, length, position /* ignored */) {
+          var sock = stream.node.sock;
+          return sock.sock_ops.sendmsg(sock, buffer, offset, length);
+        },
+  close(stream) {
+          var sock = stream.node.sock;
+          sock.sock_ops.close(sock);
+        },
+  },
+  nextname() {
+        if (!SOCKFS.nextname.current) {
+          SOCKFS.nextname.current = 0;
+        }
+        return `socket[${SOCKFS.nextname.current++}]`;
+      },
+  websocket_sock_ops:{
+  createPeer(sock, addr, port) {
+          var ws;
+  
+          if (typeof addr == 'object') {
+            ws = addr;
+            addr = null;
+            port = null;
+          }
+  
+          if (ws) {
+            // for sockets that've already connected (e.g. we're the server)
+            // we can inspect the _socket property for the address
+            if (ws._socket) {
+              addr = ws._socket.remoteAddress;
+              port = ws._socket.remotePort;
+            }
+            // if we're just now initializing a connection to the remote,
+            // inspect the url property
+            else {
+              var result = /ws[s]?:\/\/([^:]+):(\d+)/.exec(ws.url);
+              if (!result) {
+                throw new Error('WebSocket URL must be in the format ws(s)://address:port');
+              }
+              addr = result[1];
+              port = parseInt(result[2], 10);
+            }
+          } else {
+            // create the actual websocket object and connect
+            try {
+              // The default value is 'ws://' the replace is needed because the compiler replaces '//' comments with '#'
+              // comments without checking context, so we'd end up with ws:#, the replace swaps the '#' for '//' again.
+              var url = 'ws://'.replace('#', '//');
+              // Make the WebSocket subprotocol (Sec-WebSocket-Protocol) default to binary if no configuration is set.
+              var subProtocols = 'binary'; // The default value is 'binary'
+              // The default WebSocket options
+              var opts = undefined;
+  
+              // Fetch runtime WebSocket URL config.
+              if (SOCKFS.websocketArgs['url']) {
+                url = SOCKFS.websocketArgs['url'];
+              }
+              // Fetch runtime WebSocket subprotocol config.
+              if (SOCKFS.websocketArgs['subprotocol']) {
+                subProtocols = SOCKFS.websocketArgs['subprotocol'];
+              } else if (SOCKFS.websocketArgs['subprotocol'] === null) {
+                subProtocols = 'null'
+              }
+  
+              if (url === 'ws://' || url === 'wss://') { // Is the supplied URL config just a prefix, if so complete it.
+                var parts = addr.split('/');
+                url = url + parts[0] + ":" + port + "/" + parts.slice(1).join('/');
+              }
+  
+              if (subProtocols !== 'null') {
+                // The regex trims the string (removes spaces at the beginning and end, then splits the string by
+                // <any space>,<any space> into an Array. Whitespace removal is important for Websockify and ws.
+                subProtocols = subProtocols.replace(/^ +| +$/g,"").split(/ *, */);
+  
+                opts = subProtocols;
+              }
+  
+              // If node we use the ws library.
+              var WebSocketConstructor;
+              if (ENVIRONMENT_IS_NODE) {
+                WebSocketConstructor = /** @type{(typeof WebSocket)} */(require('ws'));
+              } else
+              {
+                WebSocketConstructor = WebSocket;
+              }
+              ws = new WebSocketConstructor(url, opts);
+              ws.binaryType = 'arraybuffer';
+            } catch (e) {
+              throw new FS.ErrnoError(23);
+            }
+          }
+  
+          var peer = {
+            addr,
+            port,
+            socket: ws,
+            msg_send_queue: []
+          };
+  
+          SOCKFS.websocket_sock_ops.addPeer(sock, peer);
+          SOCKFS.websocket_sock_ops.handlePeerEvents(sock, peer);
+  
+          // if this is a bound dgram socket, send the port number first to allow
+          // us to override the ephemeral port reported to us by remotePort on the
+          // remote end.
+          if (sock.type === 2 && typeof sock.sport != 'undefined') {
+            peer.msg_send_queue.push(new Uint8Array([
+                255, 255, 255, 255,
+                'p'.charCodeAt(0), 'o'.charCodeAt(0), 'r'.charCodeAt(0), 't'.charCodeAt(0),
+                ((sock.sport & 0xff00) >> 8) , (sock.sport & 0xff)
+            ]));
+          }
+  
+          return peer;
+        },
+  getPeer(sock, addr, port) {
+          return sock.peers[addr + ':' + port];
+        },
+  addPeer(sock, peer) {
+          sock.peers[peer.addr + ':' + peer.port] = peer;
+        },
+  removePeer(sock, peer) {
+          delete sock.peers[peer.addr + ':' + peer.port];
+        },
+  handlePeerEvents(sock, peer) {
+          var first = true;
+  
+          var handleOpen = function () {
+  
+            sock.connecting = false;
+            SOCKFS.emit('open', sock.stream.fd);
+  
+            try {
+              var queued = peer.msg_send_queue.shift();
+              while (queued) {
+                peer.socket.send(queued);
+                queued = peer.msg_send_queue.shift();
+              }
+            } catch (e) {
+              // not much we can do here in the way of proper error handling as we've already
+              // lied and said this data was sent. shut it down.
+              peer.socket.close();
+            }
+          };
+  
+          function handleMessage(data) {
+            if (typeof data == 'string') {
+              var encoder = new TextEncoder(); // should be utf-8
+              data = encoder.encode(data); // make a typed array from the string
+            } else {
+              assert(data.byteLength !== undefined); // must receive an ArrayBuffer
+              if (data.byteLength == 0) {
+                // An empty ArrayBuffer will emit a pseudo disconnect event
+                // as recv/recvmsg will return zero which indicates that a socket
+                // has performed a shutdown although the connection has not been disconnected yet.
+                return;
+              }
+              data = new Uint8Array(data); // make a typed array view on the array buffer
+            }
+  
+            // if this is the port message, override the peer's port with it
+            var wasfirst = first;
+            first = false;
+            if (wasfirst &&
+                data.length === 10 &&
+                data[0] === 255 && data[1] === 255 && data[2] === 255 && data[3] === 255 &&
+                data[4] === 'p'.charCodeAt(0) && data[5] === 'o'.charCodeAt(0) && data[6] === 'r'.charCodeAt(0) && data[7] === 't'.charCodeAt(0)) {
+              // update the peer's port and it's key in the peer map
+              var newport = ((data[8] << 8) | data[9]);
+              SOCKFS.websocket_sock_ops.removePeer(sock, peer);
+              peer.port = newport;
+              SOCKFS.websocket_sock_ops.addPeer(sock, peer);
+              return;
+            }
+  
+            sock.recv_queue.push({ addr: peer.addr, port: peer.port, data: data });
+            SOCKFS.emit('message', sock.stream.fd);
+          };
+  
+          if (ENVIRONMENT_IS_NODE) {
+            peer.socket.on('open', handleOpen);
+            peer.socket.on('message', function(data, isBinary) {
+              if (!isBinary) {
+                return;
+              }
+              handleMessage((new Uint8Array(data)).buffer); // copy from node Buffer -> ArrayBuffer
+            });
+            peer.socket.on('close', function() {
+              SOCKFS.emit('close', sock.stream.fd);
+            });
+            peer.socket.on('error', function(error) {
+              // Although the ws library may pass errors that may be more descriptive than
+              // ECONNREFUSED they are not necessarily the expected error code e.g.
+              // ENOTFOUND on getaddrinfo seems to be node.js specific, so using ECONNREFUSED
+              // is still probably the most useful thing to do.
+              sock.error = 14; // Used in getsockopt for SOL_SOCKET/SO_ERROR test.
+              SOCKFS.emit('error', [sock.stream.fd, sock.error, 'ECONNREFUSED: Connection refused']);
+              // don't throw
+            });
+          } else {
+            peer.socket.onopen = handleOpen;
+            peer.socket.onclose = function() {
+              SOCKFS.emit('close', sock.stream.fd);
+            };
+            peer.socket.onmessage = function peer_socket_onmessage(event) {
+              handleMessage(event.data);
+            };
+            peer.socket.onerror = function(error) {
+              // The WebSocket spec only allows a 'simple event' to be thrown on error,
+              // so we only really know as much as ECONNREFUSED.
+              sock.error = 14; // Used in getsockopt for SOL_SOCKET/SO_ERROR test.
+              SOCKFS.emit('error', [sock.stream.fd, sock.error, 'ECONNREFUSED: Connection refused']);
+            };
+          }
+        },
+  poll(sock) {
+          if (sock.type === 1 && sock.server) {
+            // listen sockets should only say they're available for reading
+            // if there are pending clients.
+            return sock.pending.length ? (64 | 1) : 0;
+          }
+  
+          var mask = 0;
+          var dest = sock.type === 1 ?  // we only care about the socket state for connection-based sockets
+            SOCKFS.websocket_sock_ops.getPeer(sock, sock.daddr, sock.dport) :
+            null;
+  
+          if (sock.recv_queue.length ||
+              !dest ||  // connection-less sockets are always ready to read
+              (dest && dest.socket.readyState === dest.socket.CLOSING) ||
+              (dest && dest.socket.readyState === dest.socket.CLOSED)) {  // let recv return 0 once closed
+            mask |= (64 | 1);
+          }
+  
+          if (!dest ||  // connection-less sockets are always ready to write
+              (dest && dest.socket.readyState === dest.socket.OPEN)) {
+            mask |= 4;
+          }
+  
+          if ((dest && dest.socket.readyState === dest.socket.CLOSING) ||
+              (dest && dest.socket.readyState === dest.socket.CLOSED)) {
+            // When an non-blocking connect fails mark the socket as writable.
+            // Its up to the calling code to then use getsockopt with SO_ERROR to
+            // retrieve the error.
+            // See https://man7.org/linux/man-pages/man2/connect.2.html
+            if (sock.connecting) {
+              mask |= 4;
+            } else  {
+              mask |= 16;
+            }
+          }
+  
+          return mask;
+        },
+  ioctl(sock, request, arg) {
+          switch (request) {
+            case 21531:
+              var bytes = 0;
+              if (sock.recv_queue.length) {
+                bytes = sock.recv_queue[0].data.length;
+              }
+              HEAP32[((arg)>>2)] = bytes;
+              return 0;
+            default:
+              return 28;
+          }
+        },
+  close(sock) {
+          // if we've spawned a listen server, close it
+          if (sock.server) {
+            try {
+              sock.server.close();
+            } catch (e) {
+            }
+            sock.server = null;
+          }
+          // close any peer connections
+          for (var peer of Object.values(sock.peers)) {
+            try {
+              peer.socket.close();
+            } catch (e) {
+            }
+            SOCKFS.websocket_sock_ops.removePeer(sock, peer);
+          }
+          return 0;
+        },
+  bind(sock, addr, port) {
+          if (typeof sock.saddr != 'undefined' || typeof sock.sport != 'undefined') {
+            throw new FS.ErrnoError(28);  // already bound
+          }
+          sock.saddr = addr;
+          sock.sport = port;
+          // in order to emulate dgram sockets, we need to launch a listen server when
+          // binding on a connection-less socket
+          // note: this is only required on the server side
+          if (sock.type === 2) {
+            // close the existing server if it exists
+            if (sock.server) {
+              sock.server.close();
+              sock.server = null;
+            }
+            // swallow error operation not supported error that occurs when binding in the
+            // browser where this isn't supported
+            try {
+              sock.sock_ops.listen(sock, 0);
+            } catch (e) {
+              if (!(e.name === 'ErrnoError')) throw e;
+              if (e.errno !== 138) throw e;
+            }
+          }
+        },
+  connect(sock, addr, port) {
+          if (sock.server) {
+            throw new FS.ErrnoError(138);
+          }
+  
+          // TODO autobind
+          // if (!sock.addr && sock.type == 2) {
+          // }
+  
+          // early out if we're already connected / in the middle of connecting
+          if (typeof sock.daddr != 'undefined' && typeof sock.dport != 'undefined') {
+            var dest = SOCKFS.websocket_sock_ops.getPeer(sock, sock.daddr, sock.dport);
+            if (dest) {
+              if (dest.socket.readyState === dest.socket.CONNECTING) {
+                throw new FS.ErrnoError(7);
+              } else {
+                throw new FS.ErrnoError(30);
+              }
+            }
+          }
+  
+          // add the socket to our peer list and set our
+          // destination address / port to match
+          var peer = SOCKFS.websocket_sock_ops.createPeer(sock, addr, port);
+          sock.daddr = peer.addr;
+          sock.dport = peer.port;
+  
+          // because we cannot synchronously block to wait for the WebSocket
+          // connection to complete, we return here pretending that the connection
+          // was a success.
+          sock.connecting = true;
+        },
+  listen(sock, backlog) {
+          if (!ENVIRONMENT_IS_NODE) {
+            throw new FS.ErrnoError(138);
+          }
+          if (sock.server) {
+             throw new FS.ErrnoError(28);  // already listening
+          }
+          var WebSocketServer = require('ws').Server;
+          var host = sock.saddr;
+          sock.server = new WebSocketServer({
+            host,
+            port: sock.sport
+            // TODO support backlog
+          });
+          SOCKFS.emit('listen', sock.stream.fd); // Send Event with listen fd.
+  
+          sock.server.on('connection', function(ws) {
+            if (sock.type === 1) {
+              var newsock = SOCKFS.createSocket(sock.family, sock.type, sock.protocol);
+  
+              // create a peer on the new socket
+              var peer = SOCKFS.websocket_sock_ops.createPeer(newsock, ws);
+              newsock.daddr = peer.addr;
+              newsock.dport = peer.port;
+  
+              // push to queue for accept to pick up
+              sock.pending.push(newsock);
+              SOCKFS.emit('connection', newsock.stream.fd);
+            } else {
+              // create a peer on the listen socket so calling sendto
+              // with the listen socket and an address will resolve
+              // to the correct client
+              SOCKFS.websocket_sock_ops.createPeer(sock, ws);
+              SOCKFS.emit('connection', sock.stream.fd);
+            }
+          });
+          sock.server.on('close', function() {
+            SOCKFS.emit('close', sock.stream.fd);
+            sock.server = null;
+          });
+          sock.server.on('error', function(error) {
+            // Although the ws library may pass errors that may be more descriptive than
+            // ECONNREFUSED they are not necessarily the expected error code e.g.
+            // ENOTFOUND on getaddrinfo seems to be node.js specific, so using EHOSTUNREACH
+            // is still probably the most useful thing to do. This error shouldn't
+            // occur in a well written app as errors should get trapped in the compiled
+            // app's own getaddrinfo call.
+            sock.error = 23; // Used in getsockopt for SOL_SOCKET/SO_ERROR test.
+            SOCKFS.emit('error', [sock.stream.fd, sock.error, 'EHOSTUNREACH: Host is unreachable']);
+            // don't throw
+          });
+        },
+  accept(listensock) {
+          if (!listensock.server || !listensock.pending.length) {
+            throw new FS.ErrnoError(28);
+          }
+          var newsock = listensock.pending.shift();
+          newsock.stream.flags = listensock.stream.flags;
+          return newsock;
+        },
+  getname(sock, peer) {
+          var addr, port;
+          if (peer) {
+            if (sock.daddr === undefined || sock.dport === undefined) {
+              throw new FS.ErrnoError(53);
+            }
+            addr = sock.daddr;
+            port = sock.dport;
+          } else {
+            // TODO saddr and sport will be set for bind()'d UDP sockets, but what
+            // should we be returning for TCP sockets that've been connect()'d?
+            addr = sock.saddr || 0;
+            port = sock.sport || 0;
+          }
+          return { addr, port };
+        },
+  sendmsg(sock, buffer, offset, length, addr, port) {
+          if (sock.type === 2) {
+            // connection-less sockets will honor the message address,
+            // and otherwise fall back to the bound destination address
+            if (addr === undefined || port === undefined) {
+              addr = sock.daddr;
+              port = sock.dport;
+            }
+            // if there was no address to fall back to, error out
+            if (addr === undefined || port === undefined) {
+              throw new FS.ErrnoError(17);
+            }
+          } else {
+            // connection-based sockets will only use the bound
+            addr = sock.daddr;
+            port = sock.dport;
+          }
+  
+          // find the peer for the destination address
+          var dest = SOCKFS.websocket_sock_ops.getPeer(sock, addr, port);
+  
+          // early out if not connected with a connection-based socket
+          if (sock.type === 1) {
+            if (!dest || dest.socket.readyState === dest.socket.CLOSING || dest.socket.readyState === dest.socket.CLOSED) {
+              throw new FS.ErrnoError(53);
+            }
+          }
+  
+          // create a copy of the incoming data to send, as the WebSocket API
+          // doesn't work entirely with an ArrayBufferView, it'll just send
+          // the entire underlying buffer
+          if (ArrayBuffer.isView(buffer)) {
+            offset += buffer.byteOffset;
+            buffer = buffer.buffer;
+          }
+  
+          var data = buffer.slice(offset, offset + length);
+  
+          // if we don't have a cached connectionless UDP datagram connection, or
+          // the TCP socket is still connecting, queue the message to be sent upon
+          // connect, and lie, saying the data was sent now.
+          if (!dest || dest.socket.readyState !== dest.socket.OPEN) {
+            // if we're not connected, open a new connection
+            if (sock.type === 2) {
+              if (!dest || dest.socket.readyState === dest.socket.CLOSING || dest.socket.readyState === dest.socket.CLOSED) {
+                dest = SOCKFS.websocket_sock_ops.createPeer(sock, addr, port);
+              }
+            }
+            dest.msg_send_queue.push(data);
+            return length;
+          }
+  
+          try {
+            // send the actual data
+            dest.socket.send(data);
+            return length;
+          } catch (e) {
+            throw new FS.ErrnoError(28);
+          }
+        },
+  recvmsg(sock, length) {
+          // http://pubs.opengroup.org/onlinepubs/7908799/xns/recvmsg.html
+          if (sock.type === 1 && sock.server) {
+            // tcp servers should not be recv()'ing on the listen socket
+            throw new FS.ErrnoError(53);
+          }
+  
+          var queued = sock.recv_queue.shift();
+          if (!queued) {
+            if (sock.type === 1) {
+              var dest = SOCKFS.websocket_sock_ops.getPeer(sock, sock.daddr, sock.dport);
+  
+              if (!dest) {
+                // if we have a destination address but are not connected, error out
+                throw new FS.ErrnoError(53);
+              }
+              if (dest.socket.readyState === dest.socket.CLOSING || dest.socket.readyState === dest.socket.CLOSED) {
+                // return null if the socket has closed
+                return null;
+              }
+              // else, our socket is in a valid state but truly has nothing available
+              throw new FS.ErrnoError(6);
+            }
+            throw new FS.ErrnoError(6);
+          }
+  
+          // queued.data will be an ArrayBuffer if it's unadulterated, but if it's
+          // requeued TCP data it'll be an ArrayBufferView
+          var queuedLength = queued.data.byteLength || queued.data.length;
+          var queuedOffset = queued.data.byteOffset || 0;
+          var queuedBuffer = queued.data.buffer || queued.data;
+          var bytesRead = Math.min(length, queuedLength);
+          var res = {
+            buffer: new Uint8Array(queuedBuffer, queuedOffset, bytesRead),
+            addr: queued.addr,
+            port: queued.port
+          };
+  
+          // push back any unread data for TCP connections
+          if (sock.type === 1 && bytesRead < queuedLength) {
+            var bytesRemaining = queuedLength - bytesRead;
+            queued.data = new Uint8Array(queuedBuffer, queuedOffset + bytesRead, bytesRemaining);
+            sock.recv_queue.unshift(queued);
+          }
+  
+          return res;
+        },
+  },
+  };
+  
+  var getSocketFromFD = (fd) => {
+      var socket = SOCKFS.getSocket(fd);
+      if (!socket) throw new FS.ErrnoError(8);
+      return socket;
+    };
+  
+  var inetPton4 = (str) => {
+      var b = str.split('.');
+      for (var i = 0; i < 4; i++) {
+        var tmp = Number(b[i]);
+        if (isNaN(tmp)) return null;
+        b[i] = tmp;
+      }
+      return (b[0] | (b[1] << 8) | (b[2] << 16) | (b[3] << 24)) >>> 0;
+    };
+  
+  var inetPton6 = (str) => {
+      var words;
+      var w, offset, z, i;
+      /* http://home.deds.nl/~aeron/regex/ */
+      var valid6regx = /^((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\3)::|:\b|$))|(?!\2\3)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i
+      var parts = [];
+      if (!valid6regx.test(str)) {
+        return null;
+      }
+      if (str === "::") {
+        return [0, 0, 0, 0, 0, 0, 0, 0];
+      }
+      // Z placeholder to keep track of zeros when splitting the string on ":"
+      if (str.startsWith("::")) {
+        str = str.replace("::", "Z:"); // leading zeros case
+      } else {
+        str = str.replace("::", ":Z:");
+      }
+  
+      if (str.indexOf(".") > 0) {
+        // parse IPv4 embedded stress
+        str = str.replace(new RegExp('[.]', 'g'), ":");
+        words = str.split(":");
+        words[words.length-4] = Number(words[words.length-4]) + Number(words[words.length-3])*256;
+        words[words.length-3] = Number(words[words.length-2]) + Number(words[words.length-1])*256;
+        words = words.slice(0, words.length-2);
+      } else {
+        words = str.split(":");
+      }
+  
+      offset = 0; z = 0;
+      for (w=0; w < words.length; w++) {
+        if (typeof words[w] == 'string') {
+          if (words[w] === 'Z') {
+            // compressed zeros - write appropriate number of zero words
+            for (z = 0; z < (8 - words.length+1); z++) {
+              parts[w+z] = 0;
+            }
+            offset = z-1;
+          } else {
+            // parse hex to field to 16-bit value and write it in network byte-order
+            parts[w+offset] = _htons(parseInt(words[w],16));
+          }
+        } else {
+          // parsed IPv4 words
+          parts[w+offset] = words[w];
+        }
+      }
+      return [
+        (parts[1] << 16) | parts[0],
+        (parts[3] << 16) | parts[2],
+        (parts[5] << 16) | parts[4],
+        (parts[7] << 16) | parts[6]
+      ];
+    };
+  
+  
+  /** @param {number=} addrlen */
+  var writeSockaddr = (sa, family, addr, port, addrlen) => {
+      switch (family) {
+        case 2:
+          addr = inetPton4(addr);
+          zeroMemory(sa, 16);
+          if (addrlen) {
+            HEAP32[((addrlen)>>2)] = 16;
+          }
+          HEAP16[((sa)>>1)] = family;
+          HEAP32[(((sa)+(4))>>2)] = addr;
+          HEAP16[(((sa)+(2))>>1)] = _htons(port);
+          break;
+        case 10:
+          addr = inetPton6(addr);
+          zeroMemory(sa, 28);
+          if (addrlen) {
+            HEAP32[((addrlen)>>2)] = 28;
+          }
+          HEAP32[((sa)>>2)] = family;
+          HEAP32[(((sa)+(8))>>2)] = addr[0];
+          HEAP32[(((sa)+(12))>>2)] = addr[1];
+          HEAP32[(((sa)+(16))>>2)] = addr[2];
+          HEAP32[(((sa)+(20))>>2)] = addr[3];
+          HEAP16[(((sa)+(2))>>1)] = _htons(port);
+          break;
+        default:
+          return 5;
+      }
+      return 0;
+    };
+  
+  
+  var DNS = {
+  address_map:{
+  id:1,
+  addrs:{
+  },
+  names:{
+  },
+  },
+  lookup_name(name) {
+        // If the name is already a valid ipv4 / ipv6 address, don't generate a fake one.
+        var res = inetPton4(name);
+        if (res !== null) {
+          return name;
+        }
+        res = inetPton6(name);
+        if (res !== null) {
+          return name;
+        }
+  
+        // See if this name is already mapped.
+        var addr;
+  
+        if (DNS.address_map.addrs[name]) {
+          addr = DNS.address_map.addrs[name];
+        } else {
+          var id = DNS.address_map.id++;
+          assert(id < 65535, 'exceeded max address mappings of 65535');
+  
+          addr = '172.29.' + (id & 0xff) + '.' + (id & 0xff00);
+  
+          DNS.address_map.names[addr] = name;
+          DNS.address_map.addrs[name] = addr;
+        }
+  
+        return addr;
+      },
+  lookup_addr(addr) {
+        if (DNS.address_map.names[addr]) {
+          return DNS.address_map.names[addr];
+        }
+  
+        return null;
+      },
+  };
+  function ___syscall_accept4(fd, addr, addrlen, flags, d1, d2) {
+  try {
+  
+      var sock = getSocketFromFD(fd);
+      var newsock = sock.sock_ops.accept(sock);
+      if (addr) {
+        var errno = writeSockaddr(addr, newsock.family, DNS.lookup_name(newsock.daddr), newsock.dport, addrlen);
+      }
+      return newsock.stream.fd;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  var inetNtop4 = (addr) =>
+      (addr & 0xff) + '.' + ((addr >> 8) & 0xff) + '.' + ((addr >> 16) & 0xff) + '.' + ((addr >> 24) & 0xff);
+  
+  
+  var inetNtop6 = (ints) => {
+      //  ref:  http://www.ietf.org/rfc/rfc2373.txt - section 2.5.4
+      //  Format for IPv4 compatible and mapped  128-bit IPv6 Addresses
+      //  128-bits are split into eight 16-bit words
+      //  stored in network byte order (big-endian)
+      //  |                80 bits               | 16 |      32 bits        |
+      //  +-----------------------------------------------------------------+
+      //  |               10 bytes               |  2 |      4 bytes        |
+      //  +--------------------------------------+--------------------------+
+      //  +               5 words                |  1 |      2 words        |
+      //  +--------------------------------------+--------------------------+
+      //  |0000..............................0000|0000|    IPv4 ADDRESS     | (compatible)
+      //  +--------------------------------------+----+---------------------+
+      //  |0000..............................0000|FFFF|    IPv4 ADDRESS     | (mapped)
+      //  +--------------------------------------+----+---------------------+
+      var str = "";
+      var word = 0;
+      var longest = 0;
+      var lastzero = 0;
+      var zstart = 0;
+      var len = 0;
+      var i = 0;
+      var parts = [
+        ints[0] & 0xffff,
+        (ints[0] >> 16),
+        ints[1] & 0xffff,
+        (ints[1] >> 16),
+        ints[2] & 0xffff,
+        (ints[2] >> 16),
+        ints[3] & 0xffff,
+        (ints[3] >> 16)
+      ];
+  
+      // Handle IPv4-compatible, IPv4-mapped, loopback and any/unspecified addresses
+  
+      var hasipv4 = true;
+      var v4part = "";
+      // check if the 10 high-order bytes are all zeros (first 5 words)
+      for (i = 0; i < 5; i++) {
+        if (parts[i] !== 0) { hasipv4 = false; break; }
+      }
+  
+      if (hasipv4) {
+        // low-order 32-bits store an IPv4 address (bytes 13 to 16) (last 2 words)
+        v4part = inetNtop4(parts[6] | (parts[7] << 16));
+        // IPv4-mapped IPv6 address if 16-bit value (bytes 11 and 12) == 0xFFFF (6th word)
+        if (parts[5] === -1) {
+          str = "::ffff:";
+          str += v4part;
+          return str;
+        }
+        // IPv4-compatible IPv6 address if 16-bit value (bytes 11 and 12) == 0x0000 (6th word)
+        if (parts[5] === 0) {
+          str = "::";
+          //special case IPv6 addresses
+          if (v4part === "0.0.0.0") v4part = ""; // any/unspecified address
+          if (v4part === "0.0.0.1") v4part = "1";// loopback address
+          str += v4part;
+          return str;
+        }
+      }
+  
+      // Handle all other IPv6 addresses
+  
+      // first run to find the longest contiguous zero words
+      for (word = 0; word < 8; word++) {
+        if (parts[word] === 0) {
+          if (word - lastzero > 1) {
+            len = 0;
+          }
+          lastzero = word;
+          len++;
+        }
+        if (len > longest) {
+          longest = len;
+          zstart = word - longest + 1;
+        }
+      }
+  
+      for (word = 0; word < 8; word++) {
+        if (longest > 1) {
+          // compress contiguous zeros - to produce "::"
+          if (parts[word] === 0 && word >= zstart && word < (zstart + longest) ) {
+            if (word === zstart) {
+              str += ":";
+              if (zstart === 0) str += ":"; //leading zeros case
+            }
+            continue;
+          }
+        }
+        // converts 16-bit words from big-endian to little-endian before converting to hex string
+        str += Number(_ntohs(parts[word] & 0xffff)).toString(16);
+        str += word < 7 ? ":" : "";
+      }
+      return str;
+    };
+  
+  var readSockaddr = (sa, salen) => {
+      // family / port offsets are common to both sockaddr_in and sockaddr_in6
+      var family = HEAP16[((sa)>>1)];
+      var port = _ntohs(HEAPU16[(((sa)+(2))>>1)]);
+      var addr;
+  
+      switch (family) {
+        case 2:
+          if (salen !== 16) {
+            return { errno: 28 };
+          }
+          addr = HEAP32[(((sa)+(4))>>2)];
+          addr = inetNtop4(addr);
+          break;
+        case 10:
+          if (salen !== 28) {
+            return { errno: 28 };
+          }
+          addr = [
+            HEAP32[(((sa)+(8))>>2)],
+            HEAP32[(((sa)+(12))>>2)],
+            HEAP32[(((sa)+(16))>>2)],
+            HEAP32[(((sa)+(20))>>2)]
+          ];
+          addr = inetNtop6(addr);
+          break;
+        default:
+          return { errno: 5 };
+      }
+  
+      return { family: family, addr: addr, port: port };
+    };
+  
+  
+  var getSocketAddress = (addrp, addrlen) => {
+      var info = readSockaddr(addrp, addrlen);
+      if (info.errno) throw new FS.ErrnoError(info.errno);
+      info.addr = DNS.lookup_addr(info.addr) || info.addr;
+      return info;
+    };
+  function ___syscall_bind(fd, addr, addrlen, d1, d2, d3) {
+  try {
+  
+      var sock = getSocketFromFD(fd);
+      var info = getSocketAddress(addr, addrlen);
+      sock.sock_ops.bind(sock, info.addr, info.port);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  
+  
+    /**
+     * Given a pointer 'ptr' to a null-terminated UTF8-encoded string in the
+     * emscripten HEAP, returns a copy of that string as a Javascript String object.
+     *
+     * @param {number} ptr
+     * @param {number=} maxBytesToRead - An optional length that specifies the
+     *   maximum number of bytes to read. You can omit this parameter to scan the
+     *   string until the first 0 byte. If maxBytesToRead is passed, and the string
+     *   at [ptr, ptr+maxBytesToReadr[ contains a null byte in the middle, then the
+     *   string will cut short at that byte index (i.e. maxBytesToRead will not
+     *   produce a string of exact length [ptr, ptr+maxBytesToRead[) N.B. mixing
+     *   frequent uses of UTF8ToString() with and without maxBytesToRead may throw
+     *   JS JIT optimizations off, so it is worth to consider consistently using one
+     * @return {string}
+     */
+  var UTF8ToString = (ptr, maxBytesToRead) => {
+      return ptr ? UTF8ArrayToString(HEAPU8, ptr, maxBytesToRead) : '';
+    };
+  var SYSCALLS = {
+  DEFAULT_POLLMASK:5,
+  calculateAt(dirfd, path, allowEmpty) {
+        if (PATH.isAbs(path)) {
+          return path;
+        }
+        // relative path
+        var dir;
+        if (dirfd === -100) {
+          dir = FS.cwd();
+        } else {
+          var dirstream = SYSCALLS.getStreamFromFD(dirfd);
+          dir = dirstream.path;
+        }
+        if (path.length == 0) {
+          if (!allowEmpty) {
+            throw new FS.ErrnoError(44);;
+          }
+          return dir;
+        }
+        return dir + '/' + path;
+      },
+  writeStat(buf, stat) {
+        HEAP32[((buf)>>2)] = stat.dev;
+        HEAP32[(((buf)+(4))>>2)] = stat.mode;
+        HEAPU32[(((buf)+(8))>>2)] = stat.nlink;
+        HEAP32[(((buf)+(12))>>2)] = stat.uid;
+        HEAP32[(((buf)+(16))>>2)] = stat.gid;
+        HEAP32[(((buf)+(20))>>2)] = stat.rdev;
+        HEAP64[(((buf)+(24))>>3)] = BigInt(stat.size);
+        HEAP32[(((buf)+(32))>>2)] = 4096;
+        HEAP32[(((buf)+(36))>>2)] = stat.blocks;
+        var atime = stat.atime.getTime();
+        var mtime = stat.mtime.getTime();
+        var ctime = stat.ctime.getTime();
+        HEAP64[(((buf)+(40))>>3)] = BigInt(Math.floor(atime / 1000));
+        HEAPU32[(((buf)+(48))>>2)] = (atime % 1000) * 1000 * 1000;
+        HEAP64[(((buf)+(56))>>3)] = BigInt(Math.floor(mtime / 1000));
+        HEAPU32[(((buf)+(64))>>2)] = (mtime % 1000) * 1000 * 1000;
+        HEAP64[(((buf)+(72))>>3)] = BigInt(Math.floor(ctime / 1000));
+        HEAPU32[(((buf)+(80))>>2)] = (ctime % 1000) * 1000 * 1000;
+        HEAP64[(((buf)+(88))>>3)] = BigInt(stat.ino);
+        return 0;
+      },
+  writeStatFs(buf, stats) {
+        HEAP32[(((buf)+(4))>>2)] = stats.bsize;
+        HEAP32[(((buf)+(40))>>2)] = stats.bsize;
+        HEAP32[(((buf)+(8))>>2)] = stats.blocks;
+        HEAP32[(((buf)+(12))>>2)] = stats.bfree;
+        HEAP32[(((buf)+(16))>>2)] = stats.bavail;
+        HEAP32[(((buf)+(20))>>2)] = stats.files;
+        HEAP32[(((buf)+(24))>>2)] = stats.ffree;
+        HEAP32[(((buf)+(28))>>2)] = stats.fsid;
+        HEAP32[(((buf)+(44))>>2)] = stats.flags;  // ST_NOSUID
+        HEAP32[(((buf)+(36))>>2)] = stats.namelen;
+      },
+  doMsync(addr, stream, len, flags, offset) {
+        if (!FS.isFile(stream.node.mode)) {
+          throw new FS.ErrnoError(43);
+        }
+        if (flags & 2) {
+          // MAP_PRIVATE calls need not to be synced back to underlying fs
+          return 0;
+        }
+        var buffer = HEAPU8.slice(addr, addr + len);
+        FS.msync(stream, buffer, offset, len, flags);
+      },
+  getStreamFromFD(fd) {
+        var stream = FS.getStreamChecked(fd);
+        return stream;
+      },
+  varargs:undefined,
+  getStr(ptr) {
+        var ret = UTF8ToString(ptr);
+        return ret;
+      },
+  };
+  function ___syscall_chdir(path) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      FS.chdir(path);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  function ___syscall_connect(fd, addr, addrlen, d1, d2, d3) {
+  try {
+  
+      var sock = getSocketFromFD(fd);
+      var info = getSocketAddress(addr, addrlen);
+      sock.sock_ops.connect(sock, info.addr, info.port);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_dup3(fd, newfd, flags) {
+  try {
+  
+      var old = SYSCALLS.getStreamFromFD(fd);
+      if (old.fd === newfd) return -28;
+      // Check newfd is within range of valid open file descriptors.
+      if (newfd < 0 || newfd >= FS.MAX_OPEN_FDS) return -8;
+      var existing = FS.getStream(newfd);
+      if (existing) FS.close(existing);
+      return FS.dupStream(old, newfd).fd;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_faccessat(dirfd, path, amode, flags) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      if (amode & ~7) {
+        // need a valid mode
+        return -28;
+      }
+      var lookup = FS.lookupPath(path, { follow: true });
+      var node = lookup.node;
+      if (!node) {
+        return -44;
+      }
+      var perms = '';
+      if (amode & 4) perms += 'r';
+      if (amode & 2) perms += 'w';
+      if (amode & 1) perms += 'x';
+      if (perms /* otherwise, they've just passed F_OK */ && FS.nodePermissions(node, perms)) {
+        return -2;
+      }
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  /** @suppress {duplicate } */
+  var syscallGetVarargI = () => {
+      // the `+` prepended here is necessary to convince the JSCompiler that varargs is indeed a number.
+      var ret = HEAP32[((+SYSCALLS.varargs)>>2)];
+      SYSCALLS.varargs += 4;
+      return ret;
+    };
+  var syscallGetVarargP = syscallGetVarargI;
+  
+  
+  function ___syscall_fcntl64(fd, cmd, varargs) {
+  SYSCALLS.varargs = varargs;
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      switch (cmd) {
+        case 0: {
+          var arg = syscallGetVarargI();
+          if (arg < 0) {
+            return -28;
+          }
+          while (FS.streams[arg]) {
+            arg++;
+          }
+          var newStream;
+          newStream = FS.dupStream(stream, arg);
+          return newStream.fd;
+        }
+        case 1:
+        case 2:
+          return 0;  // FD_CLOEXEC makes no sense for a single process.
+        case 3:
+          return stream.flags;
+        case 4: {
+          var arg = syscallGetVarargI();
+          stream.flags |= arg;
+          return 0;
+        }
+        case 12: {
+          var arg = syscallGetVarargP();
+          var offset = 0;
+          // We're always unlocked.
+          HEAP16[(((arg)+(offset))>>1)] = 2;
+          return 0;
+        }
+        case 13:
+        case 14:
+          // Pretend that the locking is successful. These are process-level locks,
+          // and Emscripten programs are a single process. If we supported linking a
+          // filesystem between programs, we'd need to do more here.
+          // See https://github.com/emscripten-core/emscripten/issues/23697
+          return 0;
+      }
+      return -28;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_fstat64(fd, buf) {
+  try {
+  
+      return SYSCALLS.writeStat(buf, FS.fstat(fd));
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  var stringToUTF8 = (str, outPtr, maxBytesToWrite) => {
+      return stringToUTF8Array(str, HEAPU8, outPtr, maxBytesToWrite);
+    };
+  function ___syscall_getcwd(buf, size) {
+  try {
+  
+      if (size === 0) return -28;
+      var cwd = FS.cwd();
+      var cwdLengthInBytes = lengthBytesUTF8(cwd) + 1;
+      if (size < cwdLengthInBytes) return -68;
+      stringToUTF8(cwd, buf, size);
+      return cwdLengthInBytes;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  function ___syscall_getdents64(fd, dirp, count) {
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd)
+      stream.getdents ||= FS.readdir(stream.path);
+  
+      var struct_size = 280;
+      var pos = 0;
+      var off = FS.llseek(stream, 0, 1);
+  
+      var startIdx = Math.floor(off / struct_size);
+      var endIdx = Math.min(stream.getdents.length, startIdx + Math.floor(count/struct_size))
+      for (var idx = startIdx; idx < endIdx; idx++) {
+        var id;
+        var type;
+        var name = stream.getdents[idx];
+        if (name === '.') {
+          id = stream.node.id;
+          type = 4; // DT_DIR
+        }
+        else if (name === '..') {
+          var lookup = FS.lookupPath(stream.path, { parent: true });
+          id = lookup.node.id;
+          type = 4; // DT_DIR
+        }
+        else {
+          var child;
+          try {
+            child = FS.lookupNode(stream.node, name);
+          } catch (e) {
+            // If the entry is not a directory, file, or symlink, nodefs
+            // lookupNode will raise EINVAL. Skip these and continue.
+            if (e?.errno === 28) {
+              continue;
+            }
+            throw e;
+          }
+          id = child.id;
+          type = FS.isChrdev(child.mode) ? 2 :  // DT_CHR, character device.
+                 FS.isDir(child.mode) ? 4 :     // DT_DIR, directory.
+                 FS.isLink(child.mode) ? 10 :   // DT_LNK, symbolic link.
+                 8;                             // DT_REG, regular file.
+        }
+        HEAP64[((dirp + pos)>>3)] = BigInt(id);
+        HEAP64[(((dirp + pos)+(8))>>3)] = BigInt((idx + 1) * struct_size);
+        HEAP16[(((dirp + pos)+(16))>>1)] = 280;
+        HEAP8[(dirp + pos)+(18)] = type;
+        stringToUTF8(name, dirp + pos + 19, 256);
+        pos += struct_size;
+      }
+      FS.llseek(stream, idx * struct_size, 0);
+      return pos;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  function ___syscall_ioctl(fd, op, varargs) {
+  SYSCALLS.varargs = varargs;
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      switch (op) {
+        case 21509: {
+          if (!stream.tty) return -59;
+          return 0;
+        }
+        case 21505: {
+          if (!stream.tty) return -59;
+          if (stream.tty.ops.ioctl_tcgets) {
+            var termios = stream.tty.ops.ioctl_tcgets(stream);
+            var argp = syscallGetVarargP();
+            HEAP32[((argp)>>2)] = termios.c_iflag || 0;
+            HEAP32[(((argp)+(4))>>2)] = termios.c_oflag || 0;
+            HEAP32[(((argp)+(8))>>2)] = termios.c_cflag || 0;
+            HEAP32[(((argp)+(12))>>2)] = termios.c_lflag || 0;
+            for (var i = 0; i < 32; i++) {
+              HEAP8[(argp + i)+(17)] = termios.c_cc[i] || 0;
+            }
+            return 0;
+          }
+          return 0;
+        }
+        case 21510:
+        case 21511:
+        case 21512: {
+          if (!stream.tty) return -59;
+          return 0; // no-op, not actually adjusting terminal settings
+        }
+        case 21506:
+        case 21507:
+        case 21508: {
+          if (!stream.tty) return -59;
+          if (stream.tty.ops.ioctl_tcsets) {
+            var argp = syscallGetVarargP();
+            var c_iflag = HEAP32[((argp)>>2)];
+            var c_oflag = HEAP32[(((argp)+(4))>>2)];
+            var c_cflag = HEAP32[(((argp)+(8))>>2)];
+            var c_lflag = HEAP32[(((argp)+(12))>>2)];
+            var c_cc = []
+            for (var i = 0; i < 32; i++) {
+              c_cc.push(HEAP8[(argp + i)+(17)]);
+            }
+            return stream.tty.ops.ioctl_tcsets(stream.tty, op, { c_iflag, c_oflag, c_cflag, c_lflag, c_cc });
+          }
+          return 0; // no-op, not actually adjusting terminal settings
+        }
+        case 21519: {
+          if (!stream.tty) return -59;
+          var argp = syscallGetVarargP();
+          HEAP32[((argp)>>2)] = 0;
+          return 0;
+        }
+        case 21520: {
+          if (!stream.tty) return -59;
+          return -28; // not supported
+        }
+        case 21531: {
+          var argp = syscallGetVarargP();
+          return FS.ioctl(stream, op, argp);
+        }
+        case 21523: {
+          // TODO: in theory we should write to the winsize struct that gets
+          // passed in, but for now musl doesn't read anything on it
+          if (!stream.tty) return -59;
+          if (stream.tty.ops.ioctl_tiocgwinsz) {
+            var winsize = stream.tty.ops.ioctl_tiocgwinsz(stream.tty);
+            var argp = syscallGetVarargP();
+            HEAP16[((argp)>>1)] = winsize[0];
+            HEAP16[(((argp)+(2))>>1)] = winsize[1];
+          }
+          return 0;
+        }
+        case 21524: {
+          // TODO: technically, this ioctl call should change the window size.
+          // but, since emscripten doesn't have any concept of a terminal window
+          // yet, we'll just silently throw it away as we do TIOCGWINSZ
+          if (!stream.tty) return -59;
+          return 0;
+        }
+        case 21515: {
+          if (!stream.tty) return -59;
+          return 0;
+        }
+        default: return -28; // not supported
+      }
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_listen(fd, backlog) {
+  try {
+  
+      var sock = getSocketFromFD(fd);
+      sock.sock_ops.listen(sock, backlog);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_lstat64(path, buf) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      return SYSCALLS.writeStat(buf, FS.lstat(path));
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_mkdirat(dirfd, path, mode) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      FS.mkdir(path, mode, 0);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_newfstatat(dirfd, path, buf, flags) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      var nofollow = flags & 256;
+      var allowEmpty = flags & 4096;
+      flags = flags & (~6400);
+      path = SYSCALLS.calculateAt(dirfd, path, allowEmpty);
+      return SYSCALLS.writeStat(buf, nofollow ? FS.lstat(path) : FS.stat(path));
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  function ___syscall_openat(dirfd, path, flags, varargs) {
+  SYSCALLS.varargs = varargs;
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      var mode = varargs ? syscallGetVarargI() : 0;
+      return FS.open(path, flags, mode).fd;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  var PIPEFS = {
+  BUCKET_BUFFER_SIZE:8192,
+  mount(mount) {
+        // Do not pollute the real root directory or its child nodes with pipes
+        // Looks like it is OK to create another pseudo-root node not linked to the FS.root hierarchy this way
+        return FS.createNode(null, '/', 16384 | 0o777, 0);
+      },
+  createPipe() {
+        var pipe = {
+          buckets: [],
+          // refcnt 2 because pipe has a read end and a write end. We need to be
+          // able to read from the read end after write end is closed.
+          refcnt : 2,
+          timestamp: new Date(),
+        };
+  
+        pipe.buckets.push({
+          buffer: new Uint8Array(PIPEFS.BUCKET_BUFFER_SIZE),
+          offset: 0,
+          roffset: 0
+        });
+  
+        var rName = PIPEFS.nextname();
+        var wName = PIPEFS.nextname();
+        var rNode = FS.createNode(PIPEFS.root, rName, 4096, 0);
+        var wNode = FS.createNode(PIPEFS.root, wName, 4096, 0);
+  
+        rNode.pipe = pipe;
+        wNode.pipe = pipe;
+  
+        var readableStream = FS.createStream({
+          path: rName,
+          node: rNode,
+          flags: 0,
+          seekable: false,
+          stream_ops: PIPEFS.stream_ops
+        });
+        rNode.stream = readableStream;
+  
+        var writableStream = FS.createStream({
+          path: wName,
+          node: wNode,
+          flags: 1,
+          seekable: false,
+          stream_ops: PIPEFS.stream_ops
+        });
+        wNode.stream = writableStream;
+  
+        return {
+          readable_fd: readableStream.fd,
+          writable_fd: writableStream.fd
+        };
+      },
+  stream_ops:{
+  getattr(stream) {
+          var node = stream.node;
+          var timestamp = node.pipe.timestamp;
+          return {
+            dev: 14,
+            ino: node.id,
+            mode: 0o10600,
+            nlink: 1,
+            uid: 0,
+            gid: 0,
+            rdev: 0,
+            size: 0,
+            atime: timestamp,
+            mtime: timestamp,
+            ctime: timestamp,
+            blksize: 4096,
+            blocks: 0,
+          };
+        },
+  poll(stream) {
+          var pipe = stream.node.pipe;
+  
+          if ((stream.flags & 2097155) === 1) {
+            return (256 | 4);
+          }
+          for (var bucket of pipe.buckets) {
+            if (bucket.offset - bucket.roffset > 0) {
+              return (64 | 1);
+            }
+          }
+  
+          return 0;
+        },
+  dup(stream) {
+          stream.node.pipe.refcnt++;
+        },
+  ioctl(stream, request, varargs) {
+          return 28;
+        },
+  fsync(stream) {
+          return 28;
+        },
+  read(stream, buffer, offset, length, position /* ignored */) {
+          var pipe = stream.node.pipe;
+          var currentLength = 0;
+  
+          for (var bucket of pipe.buckets) {
+            currentLength += bucket.offset - bucket.roffset;
+          }
+  
+          var data = buffer.subarray(offset, offset + length);
+  
+          if (length <= 0) {
+            return 0;
+          }
+          if (currentLength == 0) {
+            // Behave as if the read end is always non-blocking
+            throw new FS.ErrnoError(6);
+          }
+          var toRead = Math.min(currentLength, length);
+  
+          var totalRead = toRead;
+          var toRemove = 0;
+  
+          for (var bucket of pipe.buckets) {
+            var bucketSize = bucket.offset - bucket.roffset;
+  
+            if (toRead <= bucketSize) {
+              var tmpSlice = bucket.buffer.subarray(bucket.roffset, bucket.offset);
+              if (toRead < bucketSize) {
+                tmpSlice = tmpSlice.subarray(0, toRead);
+                bucket.roffset += toRead;
+              } else {
+                toRemove++;
+              }
+              data.set(tmpSlice);
+              break;
+            } else {
+              var tmpSlice = bucket.buffer.subarray(bucket.roffset, bucket.offset);
+              data.set(tmpSlice);
+              data = data.subarray(tmpSlice.byteLength);
+              toRead -= tmpSlice.byteLength;
+              toRemove++;
+            }
+          }
+  
+          if (toRemove && toRemove == pipe.buckets.length) {
+            // Do not generate excessive garbage in use cases such as
+            // write several bytes, read everything, write several bytes, read everything...
+            toRemove--;
+            pipe.buckets[toRemove].offset = 0;
+            pipe.buckets[toRemove].roffset = 0;
+          }
+  
+          pipe.buckets.splice(0, toRemove);
+  
+          return totalRead;
+        },
+  write(stream, buffer, offset, length, position /* ignored */) {
+          var pipe = stream.node.pipe;
+  
+          var data = buffer.subarray(offset, offset + length);
+  
+          var dataLen = data.byteLength;
+          if (dataLen <= 0) {
+            return 0;
+          }
+  
+          var currBucket = null;
+  
+          if (pipe.buckets.length == 0) {
+            currBucket = {
+              buffer: new Uint8Array(PIPEFS.BUCKET_BUFFER_SIZE),
+              offset: 0,
+              roffset: 0
+            };
+            pipe.buckets.push(currBucket);
+          } else {
+            currBucket = pipe.buckets[pipe.buckets.length - 1];
+          }
+  
+          assert(currBucket.offset <= PIPEFS.BUCKET_BUFFER_SIZE);
+  
+          var freeBytesInCurrBuffer = PIPEFS.BUCKET_BUFFER_SIZE - currBucket.offset;
+          if (freeBytesInCurrBuffer >= dataLen) {
+            currBucket.buffer.set(data, currBucket.offset);
+            currBucket.offset += dataLen;
+            return dataLen;
+          } else if (freeBytesInCurrBuffer > 0) {
+            currBucket.buffer.set(data.subarray(0, freeBytesInCurrBuffer), currBucket.offset);
+            currBucket.offset += freeBytesInCurrBuffer;
+            data = data.subarray(freeBytesInCurrBuffer, data.byteLength);
+          }
+  
+          var numBuckets = (data.byteLength / PIPEFS.BUCKET_BUFFER_SIZE) | 0;
+          var remElements = data.byteLength % PIPEFS.BUCKET_BUFFER_SIZE;
+  
+          for (var i = 0; i < numBuckets; i++) {
+            var newBucket = {
+              buffer: new Uint8Array(PIPEFS.BUCKET_BUFFER_SIZE),
+              offset: PIPEFS.BUCKET_BUFFER_SIZE,
+              roffset: 0
+            };
+            pipe.buckets.push(newBucket);
+            newBucket.buffer.set(data.subarray(0, PIPEFS.BUCKET_BUFFER_SIZE));
+            data = data.subarray(PIPEFS.BUCKET_BUFFER_SIZE, data.byteLength);
+          }
+  
+          if (remElements > 0) {
+            var newBucket = {
+              buffer: new Uint8Array(PIPEFS.BUCKET_BUFFER_SIZE),
+              offset: data.byteLength,
+              roffset: 0
+            };
+            pipe.buckets.push(newBucket);
+            newBucket.buffer.set(data);
+          }
+  
+          return dataLen;
+        },
+  close(stream) {
+          var pipe = stream.node.pipe;
+          pipe.refcnt--;
+          if (pipe.refcnt === 0) {
+            pipe.buckets = null;
+          }
+        },
+  },
+  nextname() {
+        if (!PIPEFS.nextname.current) {
+          PIPEFS.nextname.current = 0;
+        }
+        return 'pipe[' + (PIPEFS.nextname.current++) + ']';
+      },
+  };
+  function ___syscall_pipe(fdPtr) {
+  try {
+  
+      if (fdPtr == 0) {
+        throw new FS.ErrnoError(21);
+      }
+  
+      var res = PIPEFS.createPipe();
+  
+      HEAP32[((fdPtr)>>2)] = res.readable_fd;
+      HEAP32[(((fdPtr)+(4))>>2)] = res.writable_fd;
+  
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_poll(fds, nfds, timeout) {
+  try {
+  
+      var nonzero = 0;
+      for (var i = 0; i < nfds; i++) {
+        var pollfd = fds + 8 * i;
+        var fd = HEAP32[((pollfd)>>2)];
+        var events = HEAP16[(((pollfd)+(4))>>1)];
+        var mask = 32;
+        var stream = FS.getStream(fd);
+        if (stream) {
+          mask = SYSCALLS.DEFAULT_POLLMASK;
+          if (stream.stream_ops.poll) {
+            mask = stream.stream_ops.poll(stream, -1);
+          }
+        }
+        mask &= events | 8 | 16;
+        if (mask) nonzero++;
+        HEAP16[(((pollfd)+(6))>>1)] = mask;
+      }
+      return nonzero;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  
+  function ___syscall_readlinkat(dirfd, path, buf, bufsize) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      if (bufsize <= 0) return -28;
+      var ret = FS.readlink(path);
+  
+      var len = Math.min(bufsize, lengthBytesUTF8(ret));
+      var endChar = HEAP8[buf+len];
+      stringToUTF8(ret, buf, bufsize+1);
+      // readlink is one of the rare functions that write out a C string, but does never append a null to the output buffer(!)
+      // stringToUTF8() always appends a null byte, so restore the character under the null byte after the write.
+      HEAP8[buf+len] = endChar;
+      return len;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  
+  function ___syscall_recvfrom(fd, buf, len, flags, addr, addrlen) {
+  try {
+  
+      var sock = getSocketFromFD(fd);
+      var msg = sock.sock_ops.recvmsg(sock, len);
+      if (!msg) return 0; // socket is closed
+      if (addr) {
+        var errno = writeSockaddr(addr, sock.family, DNS.lookup_name(msg.addr), msg.port, addrlen);
+      }
+      HEAPU8.set(msg.buffer, buf);
+      return msg.buffer.byteLength;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_renameat(olddirfd, oldpath, newdirfd, newpath) {
+  try {
+  
+      oldpath = SYSCALLS.getStr(oldpath);
+      newpath = SYSCALLS.getStr(newpath);
+      oldpath = SYSCALLS.calculateAt(olddirfd, oldpath);
+      newpath = SYSCALLS.calculateAt(newdirfd, newpath);
+      FS.rename(oldpath, newpath);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_rmdir(path) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      FS.rmdir(path);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  
+  function ___syscall_sendto(fd, message, length, flags, addr, addr_len) {
+  try {
+  
+      var sock = getSocketFromFD(fd);
+      if (!addr) {
+        // send, no address provided
+        return FS.write(sock.stream, HEAP8, message, length);
+      }
+      var dest = getSocketAddress(addr, addr_len);
+      // sendto an address
+      return sock.sock_ops.sendmsg(sock, HEAP8, message, length, dest.addr, dest.port);
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_socket(domain, type, protocol) {
+  try {
+  
+      var sock = SOCKFS.createSocket(domain, type, protocol);
+      return sock.stream.fd;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_stat64(path, buf) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      return SYSCALLS.writeStat(buf, FS.stat(path));
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  function ___syscall_unlinkat(dirfd, path, flags) {
+  try {
+  
+      path = SYSCALLS.getStr(path);
+      path = SYSCALLS.calculateAt(dirfd, path);
+      if (flags === 0) {
+        FS.unlink(path);
+      } else if (flags === 512) {
+        FS.rmdir(path);
+      } else {
+        abort('Invalid flags passed to unlinkat');
+      }
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  }
+
+  var __abort_js = () =>
+      abort('');
+
+  var runtimeKeepaliveCounter = 0;
+  var __emscripten_runtime_keepalive_clear = () => {
+      noExitRuntime = false;
+      runtimeKeepaliveCounter = 0;
+    };
+
+  var INT53_MAX = 9007199254740992;
+  
+  var INT53_MIN = -9007199254740992;
+  var bigintToI53Checked = (num) => (num < INT53_MIN || num > INT53_MAX) ? NaN : Number(num);
+  function __gmtime_js(time, tmPtr) {
+    time = bigintToI53Checked(time);
+  
+  
+      var date = new Date(time * 1000);
+      HEAP32[((tmPtr)>>2)] = date.getUTCSeconds();
+      HEAP32[(((tmPtr)+(4))>>2)] = date.getUTCMinutes();
+      HEAP32[(((tmPtr)+(8))>>2)] = date.getUTCHours();
+      HEAP32[(((tmPtr)+(12))>>2)] = date.getUTCDate();
+      HEAP32[(((tmPtr)+(16))>>2)] = date.getUTCMonth();
+      HEAP32[(((tmPtr)+(20))>>2)] = date.getUTCFullYear()-1900;
+      HEAP32[(((tmPtr)+(24))>>2)] = date.getUTCDay();
+      var start = Date.UTC(date.getUTCFullYear(), 0, 1, 0, 0, 0, 0);
+      var yday = ((date.getTime() - start) / (1000 * 60 * 60 * 24))|0;
+      HEAP32[(((tmPtr)+(28))>>2)] = yday;
+    ;
+  }
+
+  var isLeapYear = (year) => year%4 === 0 && (year%100 !== 0 || year%400 === 0);
+  
+  var MONTH_DAYS_LEAP_CUMULATIVE = [0,31,60,91,121,152,182,213,244,274,305,335];
+  
+  var MONTH_DAYS_REGULAR_CUMULATIVE = [0,31,59,90,120,151,181,212,243,273,304,334];
+  var ydayFromDate = (date) => {
+      var leap = isLeapYear(date.getFullYear());
+      var monthDaysCumulative = (leap ? MONTH_DAYS_LEAP_CUMULATIVE : MONTH_DAYS_REGULAR_CUMULATIVE);
+      var yday = monthDaysCumulative[date.getMonth()] + date.getDate() - 1; // -1 since it's days since Jan 1
+  
+      return yday;
+    };
+  
+  function __localtime_js(time, tmPtr) {
+    time = bigintToI53Checked(time);
+  
+  
+      var date = new Date(time*1000);
+      HEAP32[((tmPtr)>>2)] = date.getSeconds();
+      HEAP32[(((tmPtr)+(4))>>2)] = date.getMinutes();
+      HEAP32[(((tmPtr)+(8))>>2)] = date.getHours();
+      HEAP32[(((tmPtr)+(12))>>2)] = date.getDate();
+      HEAP32[(((tmPtr)+(16))>>2)] = date.getMonth();
+      HEAP32[(((tmPtr)+(20))>>2)] = date.getFullYear()-1900;
+      HEAP32[(((tmPtr)+(24))>>2)] = date.getDay();
+  
+      var yday = ydayFromDate(date)|0;
+      HEAP32[(((tmPtr)+(28))>>2)] = yday;
+      HEAP32[(((tmPtr)+(36))>>2)] = -(date.getTimezoneOffset() * 60);
+  
+      // Attention: DST is in December in South, and some regions don't have DST at all.
+      var start = new Date(date.getFullYear(), 0, 1);
+      var summerOffset = new Date(date.getFullYear(), 6, 1).getTimezoneOffset();
+      var winterOffset = start.getTimezoneOffset();
+      var dst = (summerOffset != winterOffset && date.getTimezoneOffset() == Math.min(winterOffset, summerOffset))|0;
+      HEAP32[(((tmPtr)+(32))>>2)] = dst;
+    ;
+  }
+
+  
+  var __mktime_js = function(tmPtr) {
+  
+  var ret = (() => { 
+      var date = new Date(HEAP32[(((tmPtr)+(20))>>2)] + 1900,
+                          HEAP32[(((tmPtr)+(16))>>2)],
+                          HEAP32[(((tmPtr)+(12))>>2)],
+                          HEAP32[(((tmPtr)+(8))>>2)],
+                          HEAP32[(((tmPtr)+(4))>>2)],
+                          HEAP32[((tmPtr)>>2)],
+                          0);
+  
+      // There's an ambiguous hour when the time goes back; the tm_isdst field is
+      // used to disambiguate it.  Date() basically guesses, so we fix it up if it
+      // guessed wrong, or fill in tm_isdst with the guess if it's -1.
+      var dst = HEAP32[(((tmPtr)+(32))>>2)];
+      var guessedOffset = date.getTimezoneOffset();
+      var start = new Date(date.getFullYear(), 0, 1);
+      var summerOffset = new Date(date.getFullYear(), 6, 1).getTimezoneOffset();
+      var winterOffset = start.getTimezoneOffset();
+      var dstOffset = Math.min(winterOffset, summerOffset); // DST is in December in South
+      if (dst < 0) {
+        // Attention: some regions don't have DST at all.
+        HEAP32[(((tmPtr)+(32))>>2)] = Number(summerOffset != winterOffset && dstOffset == guessedOffset);
+      } else if ((dst > 0) != (dstOffset == guessedOffset)) {
+        var nonDstOffset = Math.max(winterOffset, summerOffset);
+        var trueOffset = dst > 0 ? dstOffset : nonDstOffset;
+        // Don't try setMinutes(date.getMinutes() + ...) -- it's messed up.
+        date.setTime(date.getTime() + (trueOffset - guessedOffset)*60000);
+      }
+  
+      HEAP32[(((tmPtr)+(24))>>2)] = date.getDay();
+      var yday = ydayFromDate(date)|0;
+      HEAP32[(((tmPtr)+(28))>>2)] = yday;
+      // To match expected behavior, update fields from date
+      HEAP32[((tmPtr)>>2)] = date.getSeconds();
+      HEAP32[(((tmPtr)+(4))>>2)] = date.getMinutes();
+      HEAP32[(((tmPtr)+(8))>>2)] = date.getHours();
+      HEAP32[(((tmPtr)+(12))>>2)] = date.getDate();
+      HEAP32[(((tmPtr)+(16))>>2)] = date.getMonth();
+      HEAP32[(((tmPtr)+(20))>>2)] = date.getYear();
+  
+      var timeMs = date.getTime();
+      if (isNaN(timeMs)) {
+        return -1;
+      }
+      // Return time in microseconds
+      return timeMs / 1000;
+     })();
+  return BigInt(ret);
+  };
+
+  
+  
+  
+  
+  
+  function __mmap_js(len, prot, flags, fd, offset, allocated, addr) {
+    offset = bigintToI53Checked(offset);
+  
+  
+  try {
+  
+      if (isNaN(offset)) return 61;
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      var res = FS.mmap(stream, len, offset, prot, flags);
+      var ptr = res.ptr;
+      HEAP32[((allocated)>>2)] = res.allocated;
+      HEAPU32[((addr)>>2)] = ptr;
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  ;
+  }
+
+  
+  function __msync_js(addr, len, prot, flags, fd, offset) {
+    offset = bigintToI53Checked(offset);
+  
+  
+  try {
+  
+      if (isNaN(offset)) return 61;
+      SYSCALLS.doMsync(addr, SYSCALLS.getStreamFromFD(fd), len, flags, offset);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  ;
+  }
+
+  
+  function __munmap_js(addr, len, prot, flags, fd, offset) {
+    offset = bigintToI53Checked(offset);
+  
+  
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      if (prot & 2) {
+        SYSCALLS.doMsync(addr, stream, len, flags, offset);
+      }
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return -e.errno;
+  }
+  ;
+  }
+
+  var __tzset_js = (timezone, daylight, std_name, dst_name) => {
+      // TODO: Use (malleable) environment variables instead of system settings.
+      var currentYear = new Date().getFullYear();
+      var winter = new Date(currentYear, 0, 1);
+      var summer = new Date(currentYear, 6, 1);
+      var winterOffset = winter.getTimezoneOffset();
+      var summerOffset = summer.getTimezoneOffset();
+  
+      // Local standard timezone offset. Local standard time is not adjusted for
+      // daylight savings.  This code uses the fact that getTimezoneOffset returns
+      // a greater value during Standard Time versus Daylight Saving Time (DST).
+      // Thus it determines the expected output during Standard Time, and it
+      // compares whether the output of the given date the same (Standard) or less
+      // (DST).
+      var stdTimezoneOffset = Math.max(winterOffset, summerOffset);
+  
+      // timezone is specified as seconds west of UTC ("The external variable
+      // `timezone` shall be set to the difference, in seconds, between
+      // Coordinated Universal Time (UTC) and local standard time."), the same
+      // as returned by stdTimezoneOffset.
+      // See http://pubs.opengroup.org/onlinepubs/009695399/functions/tzset.html
+      HEAPU32[((timezone)>>2)] = stdTimezoneOffset * 60;
+  
+      HEAP32[((daylight)>>2)] = Number(winterOffset != summerOffset);
+  
+      var extractZone = (timezoneOffset) => {
+        // Why inverse sign?
+        // Read here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTimezoneOffset
+        var sign = timezoneOffset >= 0 ? "-" : "+";
+  
+        var absOffset = Math.abs(timezoneOffset)
+        var hours = String(Math.floor(absOffset / 60)).padStart(2, "0");
+        var minutes = String(absOffset % 60).padStart(2, "0");
+  
+        return `UTC${sign}${hours}${minutes}`;
+      }
+  
+      var winterName = extractZone(winterOffset);
+      var summerName = extractZone(summerOffset);
+      if (summerOffset < winterOffset) {
+        // Northern hemisphere
+        stringToUTF8(winterName, std_name, 17);
+        stringToUTF8(summerName, dst_name, 17);
+      } else {
+        stringToUTF8(winterName, dst_name, 17);
+        stringToUTF8(summerName, std_name, 17);
+      }
+    };
+
+  var _emscripten_get_now = () => performance.now();
+  
+  var _emscripten_date_now = () => Date.now();
+  
+  var nowIsMonotonic = 1;
+  
+  var checkWasiClock = (clock_id) => clock_id >= 0 && clock_id <= 3;
+  
+  function _clock_time_get(clk_id, ignored_precision, ptime) {
+    ignored_precision = bigintToI53Checked(ignored_precision);
+  
+  
+      if (!checkWasiClock(clk_id)) {
+        return 28;
+      }
+      var now;
+      // all wasi clocks but realtime are monotonic
+      if (clk_id === 0) {
+        now = _emscripten_date_now();
+      } else if (nowIsMonotonic) {
+        now = _emscripten_get_now();
+      } else {
+        return 52;
+      }
+      // "now" is in ms, and wasi times are in ns.
+      var nsec = Math.round(now * 1000 * 1000);
+      HEAP64[((ptime)>>3)] = BigInt(nsec);
+      return 0;
+    ;
+  }
+
+
+  var getHeapMax = () =>
+      // Stay one Wasm page short of 4GB: while e.g. Chrome is able to allocate
+      // full 4GB Wasm memories, the size will wrap back to 0 bytes in Wasm side
+      // for any code that deals with heap sizes, which would require special
+      // casing all heap size related code to treat 0 specially.
+      2147483648;
+  var _emscripten_get_heap_max = () => getHeapMax();
+
+
+  
+  
+  var growMemory = (size) => {
+      var b = wasmMemory.buffer;
+      var pages = ((size - b.byteLength + 65535) / 65536) | 0;
+      try {
+        // round size grow request up to wasm page size (fixed 64KB per spec)
+        wasmMemory.grow(pages); // .grow() takes a delta compared to the previous size
+        updateMemoryViews();
+        return 1 /*success*/;
+      } catch(e) {
+      }
+      // implicit 0 return to save code size (caller will cast "undefined" into 0
+      // anyhow)
+    };
+  var _emscripten_resize_heap = (requestedSize) => {
+      var oldSize = HEAPU8.length;
+      // With CAN_ADDRESS_2GB or MEMORY64, pointers are already unsigned.
+      requestedSize >>>= 0;
+      // With multithreaded builds, races can happen (another thread might increase the size
+      // in between), so return a failure, and let the caller retry.
+  
+      // Memory resize rules:
+      // 1.  Always increase heap size to at least the requested size, rounded up
+      //     to next page multiple.
+      // 2a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap
+      //     geometrically: increase the heap size according to
+      //     MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%), At most
+      //     overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
+      // 2b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap
+      //     linearly: increase the heap size by at least
+      //     MEMORY_GROWTH_LINEAR_STEP bytes.
+      // 3.  Max size for the heap is capped at 2048MB-WASM_PAGE_SIZE, or by
+      //     MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
+      // 4.  If we were unable to allocate as much memory, it may be due to
+      //     over-eager decision to excessively reserve due to (3) above.
+      //     Hence if an allocation fails, cut down on the amount of excess
+      //     growth, in an attempt to succeed to perform a smaller allocation.
+  
+      // A limit is set for how much we can grow. We should not exceed that
+      // (the wasm binary specifies it, so if we tried, we'd fail anyhow).
+      var maxHeapSize = getHeapMax();
+      if (requestedSize > maxHeapSize) {
+        return false;
+      }
+  
+      // Loop through potential heap size increases. If we attempt a too eager
+      // reservation that fails, cut down on the attempted size and reserve a
+      // smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
+      for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
+        var overGrownHeapSize = oldSize * (1 + 0.2 / cutDown); // ensure geometric growth
+        // but limit overreserving (default to capping at +96MB overgrowth at most)
+        overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + 100663296 );
+  
+        var newSize = Math.min(maxHeapSize, alignMemory(Math.max(requestedSize, overGrownHeapSize), 65536));
+  
+        var replacement = growMemory(newSize);
+        if (replacement) {
+  
+          return true;
+        }
+      }
+      return false;
+    };
+
+  var ENV = {
+  };
+  
+  var getExecutableName = () => thisProgram || './this.program';
+  var getEnvStrings = () => {
+      if (!getEnvStrings.strings) {
+        // Default values.
+        // Browser language detection #8751
+        var lang = ((typeof navigator == 'object' && navigator.languages && navigator.languages[0]) || 'C').replace('-', '_') + '.UTF-8';
+        var env = {
+          'USER': 'web_user',
+          'LOGNAME': 'web_user',
+          'PATH': '/',
+          'PWD': '/',
+          'HOME': '/home/web_user',
+          'LANG': lang,
+          '_': getExecutableName()
+        };
+        // Apply the user-provided values, if any.
+        for (var x in ENV) {
+          // x is a key in ENV; if ENV[x] is undefined, that means it was
+          // explicitly set to be so. We allow user code to do that to
+          // force variables with default values to remain unset.
+          if (ENV[x] === undefined) delete env[x];
+          else env[x] = ENV[x];
+        }
+        var strings = [];
+        for (var x in env) {
+          strings.push(`${x}=${env[x]}`);
+        }
+        getEnvStrings.strings = strings;
+      }
+      return getEnvStrings.strings;
+    };
+  
+  var _environ_get = (__environ, environ_buf) => {
+      var bufSize = 0;
+      var envp = 0;
+      for (var string of getEnvStrings()) {
+        var ptr = environ_buf + bufSize;
+        HEAPU32[(((__environ)+(envp))>>2)] = ptr;
+        bufSize += stringToUTF8(string, ptr, Infinity) + 1;
+        envp += 4;
+      }
+      return 0;
+    };
+
+  
+  var _environ_sizes_get = (penviron_count, penviron_buf_size) => {
+      var strings = getEnvStrings();
+      HEAPU32[((penviron_count)>>2)] = strings.length;
+      var bufSize = 0;
+      for (var string of strings) {
+        bufSize += lengthBytesUTF8(string) + 1;
+      }
+      HEAPU32[((penviron_buf_size)>>2)] = bufSize;
+      return 0;
+    };
+
+  
+  var keepRuntimeAlive = () => noExitRuntime || runtimeKeepaliveCounter > 0;
+  var _proc_exit = (code) => {
+      EXITSTATUS = code;
+      if (!keepRuntimeAlive()) {
+        Module['onExit']?.(code);
+        ABORT = true;
+      }
+      quit_(code, new ExitStatus(code));
+    };
+  /** @suppress {duplicate } */
+  /** @param {boolean|number=} implicit */
+  var exitJS = (status, implicit) => {
+      EXITSTATUS = status;
+  
+      _proc_exit(status);
+    };
+  var _exit = exitJS;
+
+  function _fd_close(fd) {
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      FS.close(stream);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return e.errno;
+  }
+  }
+
+  function _fd_fdstat_get(fd, pbuf) {
+  try {
+  
+      var rightsBase = 0;
+      var rightsInheriting = 0;
+      var flags = 0;
+      {
+        var stream = SYSCALLS.getStreamFromFD(fd);
+        // All character devices are terminals (other things a Linux system would
+        // assume is a character device, like the mouse, we have special APIs for).
+        var type = stream.tty ? 2 :
+                   FS.isDir(stream.mode) ? 3 :
+                   FS.isLink(stream.mode) ? 7 :
+                   4;
+      }
+      HEAP8[pbuf] = type;
+      HEAP16[(((pbuf)+(2))>>1)] = flags;
+      HEAP64[(((pbuf)+(8))>>3)] = BigInt(rightsBase);
+      HEAP64[(((pbuf)+(16))>>3)] = BigInt(rightsInheriting);
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return e.errno;
+  }
+  }
+
+  /** @param {number=} offset */
+  var doReadv = (stream, iov, iovcnt, offset) => {
+      var ret = 0;
+      for (var i = 0; i < iovcnt; i++) {
+        var ptr = HEAPU32[((iov)>>2)];
+        var len = HEAPU32[(((iov)+(4))>>2)];
+        iov += 8;
+        var curr = FS.read(stream, HEAP8, ptr, len, offset);
+        if (curr < 0) return -1;
+        ret += curr;
+        if (curr < len) break; // nothing more to read
+        if (typeof offset != 'undefined') {
+          offset += curr;
+        }
+      }
+      return ret;
+    };
+  
+  function _fd_read(fd, iov, iovcnt, pnum) {
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      var num = doReadv(stream, iov, iovcnt);
+      HEAPU32[((pnum)>>2)] = num;
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return e.errno;
+  }
+  }
+
+  
+  function _fd_seek(fd, offset, whence, newOffset) {
+    offset = bigintToI53Checked(offset);
+  
+  
+  try {
+  
+      if (isNaN(offset)) return 61;
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      FS.llseek(stream, offset, whence);
+      HEAP64[((newOffset)>>3)] = BigInt(stream.position);
+      if (stream.getdents && offset === 0 && whence === 0) stream.getdents = null; // reset readdir state
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return e.errno;
+  }
+  ;
+  }
+
+  /** @param {number=} offset */
+  var doWritev = (stream, iov, iovcnt, offset) => {
+      var ret = 0;
+      for (var i = 0; i < iovcnt; i++) {
+        var ptr = HEAPU32[((iov)>>2)];
+        var len = HEAPU32[(((iov)+(4))>>2)];
+        iov += 8;
+        var curr = FS.write(stream, HEAP8, ptr, len, offset);
+        if (curr < 0) return -1;
+        ret += curr;
+        if (curr < len) {
+          // No more space to write.
+          break;
+        }
+        if (typeof offset != 'undefined') {
+          offset += curr;
+        }
+      }
+      return ret;
+    };
+  
+  function _fd_write(fd, iov, iovcnt, pnum) {
+  try {
+  
+      var stream = SYSCALLS.getStreamFromFD(fd);
+      var num = doWritev(stream, iov, iovcnt);
+      HEAPU32[((pnum)>>2)] = num;
+      return 0;
+    } catch (e) {
+    if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;
+    return e.errno;
+  }
+  }
+
+  
+  
+  
+  
+  
+  
+  
+  
+  var _getaddrinfo = (node, service, hint, out) => {
+      // Note getaddrinfo currently only returns a single addrinfo with ai_next defaulting to NULL. When NULL
+      // hints are specified or ai_family set to AF_UNSPEC or ai_socktype or ai_protocol set to 0 then we
+      // really should provide a linked list of suitable addrinfo values.
+      var addrs = [];
+      var canon = null;
+      var addr = 0;
+      var port = 0;
+      var flags = 0;
+      var family = 0;
+      var type = 0;
+      var proto = 0;
+      var ai, last;
+  
+      function allocaddrinfo(family, type, proto, canon, addr, port) {
+        var sa, salen, ai;
+        var errno;
+  
+        salen = family === 10 ?
+          28 :
+          16;
+        addr = family === 10 ?
+          inetNtop6(addr) :
+          inetNtop4(addr);
+        sa = _malloc(salen);
+        errno = writeSockaddr(sa, family, addr, port);
+        assert(!errno);
+  
+        ai = _malloc(32);
+        HEAP32[(((ai)+(4))>>2)] = family;
+        HEAP32[(((ai)+(8))>>2)] = type;
+        HEAP32[(((ai)+(12))>>2)] = proto;
+        HEAPU32[(((ai)+(24))>>2)] = canon;
+        HEAPU32[(((ai)+(20))>>2)] = sa;
+        if (family === 10) {
+          HEAP32[(((ai)+(16))>>2)] = 28;
+        } else {
+          HEAP32[(((ai)+(16))>>2)] = 16;
+        }
+        HEAP32[(((ai)+(28))>>2)] = 0;
+  
+        return ai;
+      }
+  
+      if (hint) {
+        flags = HEAP32[((hint)>>2)];
+        family = HEAP32[(((hint)+(4))>>2)];
+        type = HEAP32[(((hint)+(8))>>2)];
+        proto = HEAP32[(((hint)+(12))>>2)];
+      }
+      if (type && !proto) {
+        proto = type === 2 ? 17 : 6;
+      }
+      if (!type && proto) {
+        type = proto === 17 ? 2 : 1;
+      }
+  
+      // If type or proto are set to zero in hints we should really be returning multiple addrinfo values, but for
+      // now default to a TCP STREAM socket so we can at least return a sensible addrinfo given NULL hints.
+      if (proto === 0) {
+        proto = 6;
+      }
+      if (type === 0) {
+        type = 1;
+      }
+  
+      if (!node && !service) {
+        return -2;
+      }
+      if (flags & ~(1|2|4|
+          1024|8|16|32)) {
+        return -1;
+      }
+      if (hint !== 0 && (HEAP32[((hint)>>2)] & 2) && !node) {
+        return -1;
+      }
+      if (flags & 32) {
+        // TODO
+        return -2;
+      }
+      if (type !== 0 && type !== 1 && type !== 2) {
+        return -7;
+      }
+      if (family !== 0 && family !== 2 && family !== 10) {
+        return -6;
+      }
+  
+      if (service) {
+        service = UTF8ToString(service);
+        port = parseInt(service, 10);
+  
+        if (isNaN(port)) {
+          if (flags & 1024) {
+            return -2;
+          }
+          // TODO support resolving well-known service names from:
+          // http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt
+          return -8;
+        }
+      }
+  
+      if (!node) {
+        if (family === 0) {
+          family = 2;
+        }
+        if ((flags & 1) === 0) {
+          if (family === 2) {
+            addr = _htonl(2130706433);
+          } else {
+            addr = [0, 0, 0, _htonl(1)];
+          }
+        }
+        ai = allocaddrinfo(family, type, proto, null, addr, port);
+        HEAPU32[((out)>>2)] = ai;
+        return 0;
+      }
+  
+      //
+      // try as a numeric address
+      //
+      node = UTF8ToString(node);
+      addr = inetPton4(node);
+      if (addr !== null) {
+        // incoming node is a valid ipv4 address
+        if (family === 0 || family === 2) {
+          family = 2;
+        }
+        else if (family === 10 && (flags & 8)) {
+          addr = [0, 0, _htonl(0xffff), addr];
+          family = 10;
+        } else {
+          return -2;
+        }
+      } else {
+        addr = inetPton6(node);
+        if (addr !== null) {
+          // incoming node is a valid ipv6 address
+          if (family === 0 || family === 10) {
+            family = 10;
+          } else {
+            return -2;
+          }
+        }
+      }
+      if (addr != null) {
+        ai = allocaddrinfo(family, type, proto, node, addr, port);
+        HEAPU32[((out)>>2)] = ai;
+        return 0;
+      }
+      if (flags & 4) {
+        return -2;
+      }
+  
+      //
+      // try as a hostname
+      //
+      // resolve the hostname to a temporary fake address
+      node = DNS.lookup_name(node);
+      addr = inetPton4(node);
+      if (family === 0) {
+        family = 2;
+      } else if (family === 10) {
+        addr = [0, 0, _htonl(0xffff), addr];
+      }
+      ai = allocaddrinfo(family, type, proto, null, addr, port);
+      HEAPU32[((out)>>2)] = ai;
+      return 0;
+    };
+
+
+
+  var handleException = (e) => {
+      // Certain exception types we do not treat as errors since they are used for
+      // internal control flow.
+      // 1. ExitStatus, which is thrown by exit()
+      // 2. "unwind", which is thrown by emscripten_unwind_to_js_event_loop() and others
+      //    that wish to return to JS event loop.
+      if (e instanceof ExitStatus || e == 'unwind') {
+        return EXITSTATUS;
+      }
+      quit_(1, e);
+    };
+
+  
+  
+  var stackAlloc = (sz) => __emscripten_stack_alloc(sz);
+  var stringToUTF8OnStack = (str) => {
+      var size = lengthBytesUTF8(str) + 1;
+      var ret = stackAlloc(size);
+      stringToUTF8(str, ret, size);
+      return ret;
+    };
+
+
+  var getCFunc = (ident) => {
+      var func = Module['_' + ident]; // closure exported function
+      return func;
+    };
+  
+  var writeArrayToMemory = (array, buffer) => {
+      HEAP8.set(array, buffer);
+    };
+  
+  
+  
+  
+  
+  
+    /**
+     * @param {string|null=} returnType
+     * @param {Array=} argTypes
+     * @param {Arguments|Array=} args
+     * @param {Object=} opts
+     */
+  var ccall = (ident, returnType, argTypes, args, opts) => {
+      // For fast lookup of conversion functions
+      var toC = {
+        'string': (str) => {
+          var ret = 0;
+          if (str !== null && str !== undefined && str !== 0) { // null string
+            ret = stringToUTF8OnStack(str);
+          }
+          return ret;
+        },
+        'array': (arr) => {
+          var ret = stackAlloc(arr.length);
+          writeArrayToMemory(arr, ret);
+          return ret;
+        }
+      };
+  
+      function convertReturnValue(ret) {
+        if (returnType === 'string') {
+          return UTF8ToString(ret);
+        }
+        if (returnType === 'boolean') return Boolean(ret);
+        return ret;
+      }
+  
+      var func = getCFunc(ident);
+      var cArgs = [];
+      var stack = 0;
+      if (args) {
+        for (var i = 0; i < args.length; i++) {
+          var converter = toC[argTypes[i]];
+          if (converter) {
+            if (stack === 0) stack = stackSave();
+            cArgs[i] = converter(args[i]);
+          } else {
+            cArgs[i] = args[i];
+          }
+        }
+      }
+      var ret = func(...cArgs);
+      function onDone(ret) {
+        if (stack !== 0) stackRestore(stack);
+        return convertReturnValue(ret);
+      }
+  
+      ret = onDone(ret);
+      return ret;
+    };
+
+  
+  
+    /**
+     * @param {string=} returnType
+     * @param {Array=} argTypes
+     * @param {Object=} opts
+     */
+  var cwrap = (ident, returnType, argTypes, opts) => {
+      // When the function takes numbers and returns a number, we can just return
+      // the original function
+      var numericArgs = !argTypes || argTypes.every((type) => type === 'number' || type === 'boolean');
+      var numericRet = returnType !== 'string';
+      if (numericRet && numericArgs && !opts) {
+        return getCFunc(ident);
+      }
+      return (...args) => ccall(ident, returnType, argTypes, args, opts);
+    };
+
+
+
+
+
+  var FS_createPath = FS.createPath;
+
+
+
+  var FS_unlink = (path) => FS.unlink(path);
+
+  var FS_createLazyFile = FS.createLazyFile;
+
+  var FS_createDevice = FS.createDevice;
+
+  FS.createPreloadedFile = FS_createPreloadedFile;
+  FS.staticInit();
+  // Set module methods based on EXPORTED_RUNTIME_METHODS
+  Module['FS_createPath'] = FS.createPath;
+  Module['FS_createDataFile'] = FS.createDataFile;
+  Module['FS_createPreloadedFile'] = FS.createPreloadedFile;
+  Module['FS_unlink'] = FS.unlink;
+  Module['FS_createLazyFile'] = FS.createLazyFile;
+  Module['FS_createDevice'] = FS.createDevice;
+  ;
+
+      // This error may happen quite a bit. To avoid overhead we reuse it (and
+      // suffer a lack of stack info).
+      MEMFS.doesNotExistError = new FS.ErrnoError(44);
+      /** @suppress {checkTypes} */
+      MEMFS.doesNotExistError.stack = '<generic error, no stack>';
+      ;
+// End JS library code
+
+// include: postlibrary.js
+// This file is included after the automatically-generated JS library code
+// but before the wasm module is created.
+
+{
+
+  // Begin ATMODULES hooks
+  if (Module['noExitRuntime']) noExitRuntime = Module['noExitRuntime'];
+if (Module['preloadPlugins']) preloadPlugins = Module['preloadPlugins'];
+if (Module['print']) out = Module['print'];
+if (Module['printErr']) err = Module['printErr'];
+if (Module['wasmBinary']) wasmBinary = Module['wasmBinary'];
+  // End ATMODULES hooks
+
+  if (Module['arguments']) arguments_ = Module['arguments'];
+  if (Module['thisProgram']) thisProgram = Module['thisProgram'];
+
+}
+
+// Begin runtime exports
+  Module['addRunDependency'] = addRunDependency;
+  Module['removeRunDependency'] = removeRunDependency;
+  Module['ccall'] = ccall;
+  Module['cwrap'] = cwrap;
+  Module['UTF8ToString'] = UTF8ToString;
+  Module['stringToUTF8'] = stringToUTF8;
+  Module['lengthBytesUTF8'] = lengthBytesUTF8;
+  Module['FS_createPreloadedFile'] = FS_createPreloadedFile;
+  Module['FS_unlink'] = FS_unlink;
+  Module['FS_createPath'] = FS_createPath;
+  Module['FS_createDevice'] = FS_createDevice;
+  Module['FS'] = FS;
+  Module['FS_createDataFile'] = FS_createDataFile;
+  Module['FS_createLazyFile'] = FS_createLazyFile;
+  // End runtime exports
+  // Begin JS library exports
+  // End JS library exports
+
+// end include: postlibrary.js
+
+var wasmImports = {
+  /** @export */
+  __call_sighandler: ___call_sighandler,
+  /** @export */
+  __syscall_accept4: ___syscall_accept4,
+  /** @export */
+  __syscall_bind: ___syscall_bind,
+  /** @export */
+  __syscall_chdir: ___syscall_chdir,
+  /** @export */
+  __syscall_connect: ___syscall_connect,
+  /** @export */
+  __syscall_dup3: ___syscall_dup3,
+  /** @export */
+  __syscall_faccessat: ___syscall_faccessat,
+  /** @export */
+  __syscall_fcntl64: ___syscall_fcntl64,
+  /** @export */
+  __syscall_fstat64: ___syscall_fstat64,
+  /** @export */
+  __syscall_getcwd: ___syscall_getcwd,
+  /** @export */
+  __syscall_getdents64: ___syscall_getdents64,
+  /** @export */
+  __syscall_ioctl: ___syscall_ioctl,
+  /** @export */
+  __syscall_listen: ___syscall_listen,
+  /** @export */
+  __syscall_lstat64: ___syscall_lstat64,
+  /** @export */
+  __syscall_mkdirat: ___syscall_mkdirat,
+  /** @export */
+  __syscall_newfstatat: ___syscall_newfstatat,
+  /** @export */
+  __syscall_openat: ___syscall_openat,
+  /** @export */
+  __syscall_pipe: ___syscall_pipe,
+  /** @export */
+  __syscall_poll: ___syscall_poll,
+  /** @export */
+  __syscall_readlinkat: ___syscall_readlinkat,
+  /** @export */
+  __syscall_recvfrom: ___syscall_recvfrom,
+  /** @export */
+  __syscall_renameat: ___syscall_renameat,
+  /** @export */
+  __syscall_rmdir: ___syscall_rmdir,
+  /** @export */
+  __syscall_sendto: ___syscall_sendto,
+  /** @export */
+  __syscall_socket: ___syscall_socket,
+  /** @export */
+  __syscall_stat64: ___syscall_stat64,
+  /** @export */
+  __syscall_unlinkat: ___syscall_unlinkat,
+  /** @export */
+  _abort_js: __abort_js,
+  /** @export */
+  _emscripten_runtime_keepalive_clear: __emscripten_runtime_keepalive_clear,
+  /** @export */
+  _gmtime_js: __gmtime_js,
+  /** @export */
+  _localtime_js: __localtime_js,
+  /** @export */
+  _mktime_js: __mktime_js,
+  /** @export */
+  _mmap_js: __mmap_js,
+  /** @export */
+  _msync_js: __msync_js,
+  /** @export */
+  _munmap_js: __munmap_js,
+  /** @export */
+  _tzset_js: __tzset_js,
+  /** @export */
+  clock_time_get: _clock_time_get,
+  /** @export */
+  emscripten_date_now: _emscripten_date_now,
+  /** @export */
+  emscripten_get_heap_max: _emscripten_get_heap_max,
+  /** @export */
+  emscripten_get_now: _emscripten_get_now,
+  /** @export */
+  emscripten_resize_heap: _emscripten_resize_heap,
+  /** @export */
+  environ_get: _environ_get,
+  /** @export */
+  environ_sizes_get: _environ_sizes_get,
+  /** @export */
+  exit: _exit,
+  /** @export */
+  fd_close: _fd_close,
+  /** @export */
+  fd_fdstat_get: _fd_fdstat_get,
+  /** @export */
+  fd_read: _fd_read,
+  /** @export */
+  fd_seek: _fd_seek,
+  /** @export */
+  fd_write: _fd_write,
+  /** @export */
+  getaddrinfo: _getaddrinfo,
+  /** @export */
+  proc_exit: _proc_exit
+};
+var wasmExports;
+createWasm();
+var ___wasm_call_ctors = () => (___wasm_call_ctors = wasmExports['__wasm_call_ctors'])();
+var _malloc = Module['_malloc'] = (a0) => (_malloc = Module['_malloc'] = wasmExports['malloc'])(a0);
+var _free = Module['_free'] = (a0) => (_free = Module['_free'] = wasmExports['free'])(a0);
+var _hemlock_eval = Module['_hemlock_eval'] = (a0) => (_hemlock_eval = Module['_hemlock_eval'] = wasmExports['hemlock_eval'])(a0);
+var _hemlock_version = Module['_hemlock_version'] = () => (_hemlock_version = Module['_hemlock_version'] = wasmExports['hemlock_version'])();
+var _hemlock_context_create = Module['_hemlock_context_create'] = () => (_hemlock_context_create = Module['_hemlock_context_create'] = wasmExports['hemlock_context_create'])();
+var _hemlock_context_eval = Module['_hemlock_context_eval'] = (a0, a1) => (_hemlock_context_eval = Module['_hemlock_context_eval'] = wasmExports['hemlock_context_eval'])(a0, a1);
+var _hemlock_context_destroy = Module['_hemlock_context_destroy'] = (a0) => (_hemlock_context_destroy = Module['_hemlock_context_destroy'] = wasmExports['hemlock_context_destroy'])(a0);
+var _hemlock_context_get = Module['_hemlock_context_get'] = (a0, a1) => (_hemlock_context_get = Module['_hemlock_context_get'] = wasmExports['hemlock_context_get'])(a0, a1);
+var _hemlock_context_set = Module['_hemlock_context_set'] = (a0, a1, a2) => (_hemlock_context_set = Module['_hemlock_context_set'] = wasmExports['hemlock_context_set'])(a0, a1, a2);
+var _hemlock_context_last_error = Module['_hemlock_context_last_error'] = (a0) => (_hemlock_context_last_error = Module['_hemlock_context_last_error'] = wasmExports['hemlock_context_last_error'])(a0);
+var _hemlock_compile_script = Module['_hemlock_compile_script'] = (a0) => (_hemlock_compile_script = Module['_hemlock_compile_script'] = wasmExports['hemlock_compile_script'])(a0);
+var _hemlock_run_script = Module['_hemlock_run_script'] = (a0, a1) => (_hemlock_run_script = Module['_hemlock_run_script'] = wasmExports['hemlock_run_script'])(a0, a1);
+var _hemlock_free_script = Module['_hemlock_free_script'] = (a0) => (_hemlock_free_script = Module['_hemlock_free_script'] = wasmExports['hemlock_free_script'])(a0);
+var _main = Module['_main'] = (a0, a1) => (_main = Module['_main'] = wasmExports['__main_argc_argv'])(a0, a1);
+var _htons = (a0) => (_htons = wasmExports['htons'])(a0);
+var _htonl = (a0) => (_htonl = wasmExports['htonl'])(a0);
+var _ntohs = (a0) => (_ntohs = wasmExports['ntohs'])(a0);
+var _emscripten_builtin_memalign = (a0, a1) => (_emscripten_builtin_memalign = wasmExports['emscripten_builtin_memalign'])(a0, a1);
+var __emscripten_stack_restore = (a0) => (__emscripten_stack_restore = wasmExports['_emscripten_stack_restore'])(a0);
+var __emscripten_stack_alloc = (a0) => (__emscripten_stack_alloc = wasmExports['_emscripten_stack_alloc'])(a0);
+var _emscripten_stack_get_current = () => (_emscripten_stack_get_current = wasmExports['emscripten_stack_get_current'])();
+
+
+// include: postamble.js
+// === Auto-generated postamble setup entry stuff ===
+
+function callMain(args = []) {
+
+  var entryFunction = _main;
+
+  args.unshift(thisProgram);
+
+  var argc = args.length;
+  var argv = stackAlloc((argc + 1) * 4);
+  var argv_ptr = argv;
+  args.forEach((arg) => {
+    HEAPU32[((argv_ptr)>>2)] = stringToUTF8OnStack(arg);
+    argv_ptr += 4;
+  });
+  HEAPU32[((argv_ptr)>>2)] = 0;
+
+  try {
+
+    var ret = entryFunction(argc, argv);
+
+    // if we're not running an evented main loop, it's time to exit
+    exitJS(ret, /* implicit = */ true);
+    return ret;
+  } catch (e) {
+    return handleException(e);
+  }
+}
+
+function run(args = arguments_) {
+
+  if (runDependencies > 0) {
+    dependenciesFulfilled = run;
+    return;
+  }
+
+  preRun();
+
+  // a preRun added a dependency, run will be called later
+  if (runDependencies > 0) {
+    dependenciesFulfilled = run;
+    return;
+  }
+
+  function doRun() {
+    // run may have just been called through dependencies being fulfilled just in this very frame,
+    // or while the async setStatus time below was happening
+    Module['calledRun'] = true;
+
+    if (ABORT) return;
+
+    initRuntime();
+
+    preMain();
+
+    Module['onRuntimeInitialized']?.();
+
+    var noInitialRun = Module['noInitialRun'] || false;
+    if (!noInitialRun) callMain(args);
+
+    postRun();
+  }
+
+  if (Module['setStatus']) {
+    Module['setStatus']('Running...');
+    setTimeout(() => {
+      setTimeout(() => Module['setStatus'](''), 1);
+      doRun();
+    }, 1);
+  } else
+  {
+    doRun();
+  }
+}
+
+function preInit() {
+  if (Module['preInit']) {
+    if (typeof Module['preInit'] == 'function') Module['preInit'] = [Module['preInit']];
+    while (Module['preInit'].length > 0) {
+      Module['preInit'].shift()();
+    }
+  }
+}
+
+preInit();
+run();
+
+// end include: postamble.js
+
diff --git a/wasm/hemlock.wasm b/wasm/hemlock.wasm
new file mode 100755
index 0000000..08fca52
Binary files /dev/null and b/wasm/hemlock.wasm differ
diff --git a/wasm/pre.js b/wasm/pre.js
new file mode 100644
index 0000000..7a228ad
--- /dev/null
+++ b/wasm/pre.js
@@ -0,0 +1,7 @@
+// Hemlock WASM pre-init
+// This file is prepended to the Emscripten output.
+// It sets up the Module object for browser/Node.js environments.
+
+if (typeof Module === 'undefined') {
+    Module = {};
+}