1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/js_string_iterator.h"
17
18 #include "ecmascript/ecma_vm.h"
19 #include "ecmascript/global_env.h"
20 #include "ecmascript/js_tagged_value.h"
21 #include "ecmascript/object_factory.h"
22 #include "libpandabase/macros.h"
23
24 namespace panda::ecmascript {
CreateStringIterator(const JSThread * thread,const JSHandle<EcmaString> & string)25 JSHandle<JSStringIterator> JSStringIterator::CreateStringIterator(const JSThread *thread,
26 const JSHandle<EcmaString> &string)
27 {
28 // 1. Assert: Type(string) is String.
29 // 2. Let iterator be ObjectCreate(%StringIteratorPrototype%, [[IteratedString]], [[StringIteratorNextIndex]] ?.)
30 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
31 JSHandle<JSTaggedValue> strIterCtor = env->GetStringIterator();
32 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
33 JSHandle<JSStringIterator> iterator = JSHandle<JSStringIterator>::Cast(
34 factory->NewJSObjectByConstructor(JSHandle<JSFunction>(strIterCtor), strIterCtor));
35 // 3. Set iterator’s [[IteratedString]] internal slot to string.
36 // 4. Set iterator’s [[StringIteratorNextIndex]] internal slot to 0.
37 iterator->SetIteratedString(thread, string);
38 iterator->SetStringIteratorNextIndex(0);
39 return iterator;
40 }
41 } // namespace panda::ecmascript
42