Add support for compiling with Microsoft Visual Studio C++ (MSVC) (#246)

.github/workflows/ci.yml

@@ -255,6 +255,34 @@ jobs:
         run: |
           make test
 
+  windows-msvc:
+    runs-on: windows-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        buildType: [Debug, Release]
+    steps:
+      - uses: actions/checkout@v3
+      - name: build
+        run: |
+          cmake -B build -DCMAKE_BUILD_TYPE=${{matrix.buildType}} -G "Visual Studio 17 2022"
+          cmake --build build --target qjs_exe
+          cmake --build build --target function_source
+      - name: stats
+        run: |
+          build\Debug\qjs.exe -qd
+      - name: test
+        run: |
+          build\Debug\qjs.exe tests\test_bigint.js
+          build\Debug\qjs.exe tests\test_closure.js
+          build\Debug\qjs.exe tests\test_language.js
+          build\Debug\qjs.exe tests\test_builtin.js
+          build\Debug\qjs.exe tests\test_loop.js
+          build\Debug\qjs.exe tests\test_std.js
+          build\Debug\qjs.exe tests\test_worker.js
+          build\Debug\qjs.exe tests\test_queue_microtask.js
+          build\Debug\function_source.exe
+
   windows-clang:
     runs-on: windows-latest
     strategy:

.gitignore

@@ -5,3 +5,5 @@
 build/
 unicode/
 test262_*.txt
+.idea
+cmake-*

cutils.h

@@ -46,11 +46,56 @@
 #include <malloc_np.h>
 #endif
 
+
+#if defined(_MSC_VER) && !defined(__clang__)
+#  define likely(x)       (x)
+#  define unlikely(x)     (x)
+#  define force_inline __forceinline
+#  define no_inline __declspec(noinline)
+#  define __maybe_unused
+#  define __attribute__(x)
+#  define __attribute(x)
+#  include <intrin.h>
+static void *__builtin_frame_address(unsigned int level) {
+    return (void *)((char*)_AddressOfReturnAddress() - sizeof(int *) - level * sizeof(int *));
+}
+#else
 #  define likely(x)       __builtin_expect(!!(x), 1)
 #  define unlikely(x)     __builtin_expect(!!(x), 0)
 #  define force_inline inline __attribute__((always_inline))
 #  define no_inline __attribute__((noinline))
 #  define __maybe_unused __attribute__((unused))
+#endif
+
+// https://stackoverflow.com/a/6849629
+#undef FORMAT_STRING
+#if _MSC_VER >= 1400
+# include <sal.h>
+# if _MSC_VER > 1400
+#  define FORMAT_STRING(p) _Printf_format_string_ p
+# else
+#  define FORMAT_STRING(p) __format_string p
+# endif /* FORMAT_STRING */
+#else
+# define FORMAT_STRING(p) p
+#endif /* _MSC_VER */
+
+// https://stackoverflow.com/a/3312896
+// https://stackoverflow.com/a/3312896
+#if defined(__GNUC__) || defined(__clang__) // GCC, clang, clang-cl, and so on but not MSVC
+#  define PACK( __Declaration__ ) __Declaration__ __attribute__((__packed__))
+#elif defined(_MSC_VER) && !defined(__clang__) // MSVC
+#  define PACK( __Declaration__ ) __pragma( pack(push, 1) ) __Declaration__ __pragma( pack(pop))
+#endif
+
+#if defined(_MSC_VER) && !defined(__clang__)
+#include <math.h>
+#define INF INFINITY
+#define NEG_INF -INFINITY
+#else
+#define INF (1.0/0.0)
+#define NEG_INF (-1.0/0.0)
+#endif
 
 #define xglue(x, y) x ## y
 #define glue(x, y) xglue(x, y)
@@ -136,38 +181,68 @@ static inline int64_t min_int64(int64_t a, int64_t b)
 /* WARNING: undefined if a = 0 */
 static inline int clz32(unsigned int a)
 {
+#if defined(_MSC_VER) && !defined(__clang__)
+    unsigned long index;
+    _BitScanReverse(&index, a);
+    return 31 - index;
+#else
     return __builtin_clz(a);
+#endif
 }
 
 /* WARNING: undefined if a = 0 */
 static inline int clz64(uint64_t a)
 {
+#if defined(_MSC_VER) && !defined(__clang__)
+    unsigned long index;
+    _BitScanReverse64(&index, a);
+    return 63 - index;
+#else
     return __builtin_clzll(a);
+#endif
 }
 
 /* WARNING: undefined if a = 0 */
 static inline int ctz32(unsigned int a)
 {
+#if defined(_MSC_VER) && !defined(__clang__)
+    unsigned long index;
+    _BitScanForward(&index, a);
+    return index;
+#else
     return __builtin_ctz(a);
+#endif
 }
 
 /* WARNING: undefined if a = 0 */
 static inline int ctz64(uint64_t a)
 {
+#if defined(_MSC_VER) && !defined(__clang__)
+    unsigned long index;
+    _BitScanForward64(&index, a);
+    return index;
+#else
     return __builtin_ctzll(a);
+#endif
 }
 
-struct __attribute__((packed)) packed_u64 {
+PACK(
+    struct packed_u64 {
              uint64_t v;
-};
+    }
+);
 
-struct __attribute__((packed)) packed_u32 {
+PACK(
+    struct packed_u32 {
         uint32_t v;
-};
+    }
+);
 
-struct __attribute__((packed)) packed_u16 {
+PACK(
+    struct packed_u16 {
         uint16_t v;
-};
+    }
+);
 
 static inline uint64_t get_u64(const uint8_t *tab)
 {
@@ -299,7 +374,7 @@ static inline int dbuf_put_u64(DynBuf *s, uint64_t val)
     return dbuf_put(s, (uint8_t *)&val, 8);
 }
 int __attribute__((format(printf, 2, 3))) dbuf_printf(DynBuf *s,
-                                                      const char *fmt, ...);
+                                                      FORMAT_STRING(const char *fmt), ...);
 void dbuf_free(DynBuf *s);
 static inline BOOL dbuf_error(DynBuf *s) {
     return s->error;

quickjs.c

@@ -10153,7 +10153,7 @@ static JSValue js_atof2(JSContext *ctx, const char *str, const char **pp,
         if (!(flags & ATOD_INT_ONLY) &&
             atod_type == ATOD_TYPE_FLOAT64 &&
             strstart(p, "Infinity", &p)) {
-            double d = 1.0 / 0.0;
+            double d = INF;
             if (is_neg)
                 d = -d;
             val = js_float64(d);
@@ -22082,6 +22082,8 @@ static int js_parse_destructuring_element(JSParseState *s, int tok, int is_arg,
     int opcode, scope, tok1, skip_bits;
     BOOL has_initializer;
 
+    label_lvalue = -1;
+
     if (has_ellipsis < 0) {
         /* pre-parse destructuration target for spread detection */
         js_parse_skip_parens_token(s, &skip_bits, FALSE);
@@ -40441,7 +40443,7 @@ static JSValue js_math_min_max(JSContext *ctx, JSValue this_val,
     uint32_t tag;
 
     if (unlikely(argc == 0)) {
-        return __JS_NewFloat64(is_max ? -1.0 / 0.0 : 1.0 / 0.0);
+        return __JS_NewFloat64(is_max ? NEG_INF : INF);
     }
 
     tag = JS_VALUE_GET_TAG(argv[0]);