feat: deno and meson build

Author: superstructor

deno.json

@@ -0,0 +1,14 @@
+{
+  "name": "@discere-os/json-c.wasm",
+  "exports": {
+    ".": "./",
+    "./side": "./install/wasm/json-c-side.wasm",
+    "./main": "./install/wasm/json-c-main.js"
+  },
+  "tasks": {
+    "build:main:meson": "meson setup build-main --cross-file=scripts/emscripten.cross -Dmain_module=true -Dside_module=false -Dsimd=true --prefix=$PWD/install -Dlibdir=wasm -Dbindir=wasm && meson compile -C build-main json-c-main && meson install -C build-main",
+    "build:side:meson": "meson setup build-side --cross-file=scripts/emscripten.cross -Dmain_module=false -Dside_module=true -Dsimd=true --prefix=$PWD/install -Dlibdir=wasm -Dbindir=wasm && meson compile -C build-side json-c-side && meson install -C build-side && python3 scripts/postinstall.py $PWD/install",
+    "build:wasm:meson": "deno task build:main:meson && deno task build:side:meson"
+  }
+}
+

exports.json

@@ -0,0 +1,5 @@
+[
+  "_malloc",
+  "_free"
+]
+

meson.build

@@ -0,0 +1,45 @@
+project('json-c.wasm', 'c', version: '0.17.0', meson_version: '>=1.3.0',
+  default_options: ['buildtype=release'])
+
+fs = import('fs')
+
+if get_option('simd')
+  add_project_arguments('-msimd128', language: 'c')
+endif
+
+incs = include_directories('.')
+
+# Collect core sources (exclude tests/apps/bench/examples)
+core_sources = []
+core_sources += fs.glob('*.c', exclude: ['tests/**', 'bench/**', 'benchmarks/**', 'examples/**', 'apps/**'])
+
+core = static_library('jsonc_core', core_sources, include_directories: incs)
+
+install_dir = get_option('bindir')
+
+if get_option('main_module')
+  main_link_args = [
+    '--no-entry',
+    '-sMODULARIZE=1',
+    '-sEXPORT_ES6=1',
+    '-sALLOW_MEMORY_GROWTH=1',
+    '-sENVIRONMENT=web,webview,worker',
+    '-sNO_FILESYSTEM=1',
+    '-sEXPORTED_RUNTIME_METHODS=["cwrap","ccall","UTF8ToString"]',
+    '-sEXPORTED_FUNCTIONS=@' + meson.project_source_root() / get_option('exports'),
+  ]
+  executable('json-c-main', 'src/jsonc_wasm_module.c',
+    link_with: core,
+    include_directories: incs,
+    install: true,
+    link_args: main_link_args)
+endif
+
+if get_option('side_module')
+  shared_module('json-c-side', 'src/jsonc_wasm_side.c',
+    link_whole: core,
+    include_directories: incs,
+    install: true,
+    link_args: ['-sSIDE_MODULE=2', '-fPIC'])
+endif
+

meson.options

@@ -0,0 +1,5 @@
+option('main_module', type: 'boolean', value: false, description: 'Build MAIN module (ES6 + MODULARIZE)')
+option('side_module', type: 'boolean', value: false, description: 'Build SIDE module (for dlopen)')
+option('simd', type: 'boolean', value: true, description: 'Enable wasm SIMD (msimd128)')
+option('exports', type: 'string', value: 'exports.json', description: 'Path to EXPORTED_FUNCTIONS json for MAIN build')
+

scripts/emscripten.cross

@@ -0,0 +1,18 @@
+[binaries]
+c = 'emcc'
+cpp = 'em++'
+ar = 'emar'
+ranlib = 'emranlib'
+strip = 'llvm-strip'
+pkgconfig = 'em-pkg-config'
+
+[built-in options]
+c_args = []
+c_link_args = []
+
+[host_machine]
+system = 'emscripten'
+cpu_family = 'wasm32'
+cpu = 'wasm32'
+endian = 'little'
+

scripts/postinstall.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+import os
+import sys
+import shutil
+
+def main():
+    if len(sys.argv) < 2:
+        print('Usage: postinstall.py <install_prefix>')
+        sys.exit(1)
+    prefix = sys.argv[1]
+    wasm_dir = os.path.join(prefix, 'wasm')
+    if not os.path.isdir(wasm_dir):
+        return
+    # Rename libjson-c-side.wasm -> json-c-side.wasm if present
+    for name in os.listdir(wasm_dir):
+        if name.startswith('libjson-c-side') and name.endswith('.wasm'):
+            src = os.path.join(wasm_dir, name)
+            dst = os.path.join(wasm_dir, 'json-c-side.wasm')
+            if os.path.exists(dst):
+                os.remove(dst)
+            shutil.move(src, dst)
+
+if __name__ == '__main__':
+    main()
+

src/jsonc_wasm_module.c

@@ -0,0 +1,6 @@
+#include <stdint.h>
+// Minimal stub entry for MAIN module builds
+int jsonc_wasm_version_stub(void) {
+  return 1;
+}
+

src/jsonc_wasm_side.c

@@ -0,0 +1,3 @@
+// Empty translation unit to drive SIDE module link
+void __jsonc_wasm_side_marker(void) {}
+