Function BindAccessorToObject

bridge.c:720–761

BindAccessorToObject - Bind an accessor to a JavaScript object

// BindAccessorToObject - Bind an accessor to a JavaScript object
JSValue BindAccessorToObject(JSContext *ctx, JSValue obj, const AccessorEntry *accessor) {
    JSAtom accessor_atom = JS_NewAtom(ctx, accessor->name);
    JSValue getter = JS_UNDEFINED;
    JSValue setter = JS_UNDEFINED;
    
    // Create getter
    if (accessor->getter_id != 0) {
        getter = CreateCFunction(ctx, accessor->name, 0,
                                JS_CFUNC_getter_magic, accessor->getter_id);
        if (JS_IsException(getter)) {
            JS_FreeAtom(ctx, accessor_atom);
            return getter;
        }
    }
    
    // Create setter
    if (accessor->setter_id != 0) {
        setter = CreateCFunction(ctx, accessor->name, 1,
                                JS_CFUNC_setter_magic, accessor->setter_id);
        if (JS_IsException(setter)) {
            JS_FreeAtom(ctx, accessor_atom);
            if (!JS_IsUndefined(getter)) {
                JS_FreeValue(ctx, getter);
            }
            return setter;
        }
    }
    
    // Define accessor
    int result = JS_DefinePropertyGetSet(ctx, obj, accessor_atom, getter, setter,
                                        JS_PROP_CONFIGURABLE);
    
    JS_FreeAtom(ctx, accessor_atom);
    
    if (result < 0) {
        if (!JS_IsUndefined(getter)) JS_FreeValue(ctx, getter);
        if (!JS_IsUndefined(setter)) JS_FreeValue(ctx, setter);
        return JS_ThrowInternalError(ctx, "failed to bind accessor: %s", accessor->name);
    }
    
    return JS_UNDEFINED;
}

// BindPropertyToObject - Bind a data property to a JavaScript object
// This creates real data properties using JS_DefinePropertyValueStr