Support printing unicode characters on Windows

Author: andrjohns

quickjs-libc.c

@@ -3875,15 +3875,42 @@ JSModuleDef *js_init_module_os(JSContext *ctx, const char *module_name)
 
 /**********************************************************/
 
+#ifdef _WIN32
 static JSValue js_print(JSContext *ctx, JSValue this_val,
                         int argc, JSValue *argv)
 {
     int i;
     const char *str;
     size_t len;
-
+    DWORD written;
+    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
+    if (hConsole == INVALID_HANDLE_VALUE)
+        return JS_EXCEPTION;
     for(i = 0; i < argc; i++) {
         if (i != 0)
+            WriteConsoleW(hConsole, L" ", 1, &written, NULL);
+        str = JS_ToCStringLen(ctx, &len, argv[i]);
+        if (!str)
+            return JS_EXCEPTION;
+        DWORD prev = GetConsoleOutputCP();
+        SetConsoleOutputCP(CP_UTF8);
+        WriteConsoleA(hConsole, str, len, &written, NULL);
+        SetConsoleOutputCP(prev);
+        JS_FreeCString(ctx, str);
+    }
+    WriteConsoleW(hConsole, L"\n", 1, &written, NULL);
+    FlushFileBuffers(hConsole);
+    return JS_UNDEFINED;
+}
+#else
+static JSValue js_print(JSContext *ctx, JSValue this_val,
+                        int argc, JSValue *argv)
+{
+    int i;
+    const char *str;
+    size_t len;
+    for(i = 0; i < argc; i++) {
+        if (i != 0) 
             putchar(' ');
         str = JS_ToCStringLen(ctx, &len, argv[i]);
         if (!str)
@@ -3895,6 +3922,7 @@ static JSValue js_print(JSContext *ctx, JSValue this_val,
     fflush(stdout);
     return JS_UNDEFINED;
 }
+#endif
 
 void js_std_add_helpers(JSContext *ctx, int argc, char **argv)
 {