feat(farmhash): add LLAR formula

google/farmhash/0d859a811870d10f53a594927d0d0b97573ad06d/CMakeLists.txt

@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 3.15)
+project(farmhash LANGUAGES CXX)
+
+include(GNUInstallDirs)
+
+if(NOT FARMHASH_NO_BUILTIN_EXPECT)
+    # Transcribed from farmhash/src/Makefile.am
+    include(CheckCXXSourceCompiles)
+    check_cxx_source_compiles(
+        "int main(int argc, char* argv[]) { return (int)__builtin_expect(0, 0); }"
+        FARMHASH_HAS_BUILTIN_EXPECT
+    )
+endif()
+
+add_library(farmhash "${FARMHASH_SRC_DIR}/src/farmhash.cc" )
+target_include_directories(farmhash PRIVATE "${FARMHASH_SRC_DIR}/src")
+
+if(NOT FARMHASH_HAS_BUILTIN_EXPECT)
+    target_compile_definitions(farmhash PUBLIC FARMHASH_NO_BUILTIN_EXPECT)
+endif()
+
+set_target_properties(farmhash
+    PROPERTIES
+        PUBLIC_HEADER "${FARMHASH_SRC_DIR}/src/farmhash.h"
+        WINDOWS_EXPORT_ALL_SYMBOLS ON
+)
+
+install(TARGETS farmhash
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)

google/farmhash/0d859a811870d10f53a594927d0d0b97573ad06d/farmhash_llar.gox

@@ -0,0 +1,106 @@
+import (
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+)
+
+const consumerSource = `#include <farmhash.h>
+
+#include <iostream>
+#include <string>
+
+int main() {
+    std::string aString = "Conan";
+    uint32_t hashResult;
+
+    hashResult = util::Hash32(aString);
+
+    std::cout << "Input string: " << aString << std::endl;
+    std::cout << "Generated hash: " << hashResult << std::endl;
+
+    return 0;
+}
+`
+
+id "google/farmhash"
+
+fromVer "0d859a811870d10f53a594927d0d0b97573ad06d"
+
+defaults {
+	"shared": "OFF",
+	"fPIC": "ON",
+	"no_builtin_expect": "OFF",
+}
+
+filter => {
+	for name, values in target.options {
+		if name != "shared" && name != "fPIC" && name != "no_builtin_expect" {
+			return false
+		}
+		for value in values {
+			if value != "ON" && value != "OFF" {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+onBuild ctx => {
+	installDir := ctx.outputDir
+
+	cmakeLists := ctx.Proj.readFile("0d859a811870d10f53a594927d0d0b97573ad06d/CMakeLists.txt")!
+	os.writeFile(filepath.join(ctx.SourceDir, "CMakeLists.txt"), cmakeLists, 0o644)!
+
+	shared := slices.contains(target.options["shared"], "ON")
+	fPIC := slices.contains(target.options["fPIC"], "ON")
+	noBuiltinExpect := slices.contains(target.options["no_builtin_expect"], "ON")
+
+	c := cmake.new(ctx.SourceDir, filepath.join(ctx.SourceDir, "_build"), installDir)
+	c.define "FARMHASH_SRC_DIR", ctx.SourceDir
+	c.defineBool "BUILD_SHARED_LIBS", shared
+	c.defineBool "CMAKE_POSITION_INDEPENDENT_CODE", fPIC
+	c.defineBool "FARMHASH_NO_BUILTIN_EXPECT", noBuiltinExpect
+	c.configure
+	c.build
+	c.install
+
+	licenseDir := filepath.join(installDir, "licenses")
+	os.mkdirAll(licenseDir, 0o755)!
+	os.writeFile(filepath.join(licenseDir, "COPYING"), os.readFile(filepath.join(ctx.SourceDir, "COPYING"))!, 0o644)!
+
+	flags := []string{
+		"-I" + filepath.join(installDir, "include"),
+		"-L" + filepath.join(installDir, "lib"),
+		"-lfarmhash",
+	}
+	ctx.setMetadata strings.join(flags, " ")
+}
+
+onTest ctx => {
+	installDir := ctx.outputDir
+	testDir := filepath.join(ctx.SourceDir, "_llar_consumer")
+	os.mkdirAll(testDir, 0o755)!
+
+	consumer := filepath.join(testDir, "consumer.cpp")
+	os.writeFile(consumer, []byte(consumerSource), 0o644)!
+
+	binary := filepath.join(testDir, "consumer")
+	flags := []string{
+		"-I" + filepath.join(installDir, "include"),
+		consumer,
+		"-L" + filepath.join(installDir, "lib"),
+		"-lfarmhash",
+		"-o", binary,
+	}
+	exec "c++", flags...
+	lastErr!
+
+	if slices.contains(target.options["shared"], "ON") {
+		os.setenv("LD_LIBRARY_PATH", filepath.join(installDir, "lib"))!
+		os.setenv("DYLD_LIBRARY_PATH", filepath.join(installDir, "lib"))!
+	}
+	exec binary
+	lastErr!
+}

google/farmhash/versions.json

@@ -0,0 +1,4 @@
+{
+	"path": "google/farmhash",
+	"deps": {}
+}