Пример #1
0
js::UnsafeDefineElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::HandleValue value)
{
    JS_ASSERT(obj->isNative());
    JS_ASSERT(index < obj->getDenseInitializedLength());
    obj->setDenseElementWithType(cx, index, value);
}
Пример #2
0
JS_GetPropertyDescArray(JSContext *cx, JS::HandleObject obj, JSPropertyDescArray *pda)
{
    assertSameCompartment(cx, obj);
    uint32_t i = 0;
    JSPropertyDesc *pd = nullptr;

    if (obj->is<DebugScopeObject>()) {
        AutoIdVector props(cx);
        if (!Proxy::enumerate(cx, obj, props))
            return false;

        pd = cx->pod_calloc<JSPropertyDesc>(props.length());
        if (!pd)
            return false;

        for (i = 0; i < props.length(); ++i) {
            pd[i].id = JSVAL_NULL;
            pd[i].value = JSVAL_NULL;
            if (!AddValueRoot(cx, &pd[i].id, nullptr))
                goto bad;
            pd[i].id = IdToValue(props[i]);
            if (!AddValueRoot(cx, &pd[i].value, nullptr))
                goto bad;
            if (!Proxy::get(cx, obj, obj, props.handleAt(i), MutableHandleValue::fromMarkedLocation(&pd[i].value)))
                goto bad;
        }

        pda->length = props.length();
        pda->array = pd;
        return true;
    }

    const Class *clasp;
    clasp = obj->getClass();
    if (!obj->isNative() || (clasp->flags & JSCLASS_NEW_ENUMERATE)) {
        JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
                             JSMSG_CANT_DESCRIBE_PROPS, clasp->name);
        return false;
    }
    if (!clasp->enumerate(cx, obj))
        return false;

    /* Return an empty pda early if obj has no own properties. */
    if (obj->nativeEmpty()) {
        pda->length = 0;
        pda->array = nullptr;
        return true;
    }

    pd = cx->pod_malloc<JSPropertyDesc>(obj->propertyCount());
    if (!pd)
        return false;

    {
        Shape::Range<CanGC> r(cx, obj->lastProperty());
        RootedShape shape(cx);
        for (; !r.empty(); r.popFront()) {
            pd[i].id = JSVAL_NULL;
            pd[i].value = JSVAL_NULL;
            pd[i].alias = JSVAL_NULL;
            if (!AddValueRoot(cx, &pd[i].id, nullptr))
                goto bad;
            if (!AddValueRoot(cx, &pd[i].value, nullptr))
                goto bad;
            shape = const_cast<Shape *>(&r.front());
            if (!GetPropertyDesc(cx, obj, shape, &pd[i]))
                goto bad;
            if ((pd[i].flags & JSPD_ALIAS) && !AddValueRoot(cx, &pd[i].alias, nullptr))
                goto bad;
            if (++i == obj->propertyCount())
                break;
        }
    }

    pda->length = i;
    pda->array = pd;
    return true;

bad:
    pda->length = i + 1;
    pda->array = pd;
    JS_PutPropertyDescArray(cx, pda);
    return false;
}