1 /*
2 * Copyright (c) 2022 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_api/js_api_list_iterator.h"
17
18 #include "ecmascript/containers/containers_errors.h"
19 #include "ecmascript/global_env.h"
20 #include "ecmascript/js_api/js_api_list.h"
21
22 namespace panda::ecmascript {
23 using BuiltinsBase = base::BuiltinsBase;
24 using ContainerError = containers::ContainerError;
25 using ErrorFlag = containers::ErrorFlag;
Next(EcmaRuntimeCallInfo * argv)26 JSTaggedValue JSAPIListIterator::Next(EcmaRuntimeCallInfo *argv)
27 {
28 ASSERT(argv);
29 JSThread *thread = argv->GetThread();
30 [[maybe_unused]] EcmaHandleScope handleScope(thread);
31 JSHandle<JSTaggedValue> input(BuiltinsBase::GetThis(argv));
32 if (!input->IsJSAPIListIterator()) {
33 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
34 "The Symbol.iterator method cannot be bound");
35 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error, JSTaggedValue::Exception());
36 }
37 JSHandle<JSAPIListIterator> iter(input);
38 JSHandle<JSTaggedValue> list(thread, iter->GetIteratedList(thread));
39 JSHandle<TaggedSingleList> singleList(list);
40 if (list->IsUndefined()) {
41 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
42 return env->GetUndefinedIteratorResult().GetTaggedValue();
43 }
44 int index = static_cast<int>(iter->GetNextIndex());
45 int length = singleList->Length();
46 if (index >= length) {
47 JSHandle<JSTaggedValue> undefinedHandle = thread->GlobalConstants()->GetHandledUndefined();
48 iter->SetIteratedList(thread, undefinedHandle);
49 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
50 return env->GetUndefinedIteratorResult().GetTaggedValue();
51 }
52 iter->SetNextIndex(index + 1);
53 int dataIndex = static_cast<int>(iter->GetDataIndex());
54 std::pair<int, JSTaggedValue> resultPair = singleList->GetByDataIndex(thread, dataIndex);
55 iter->SetDataIndex(resultPair.first);
56 JSHandle<JSTaggedValue> value(thread, resultPair.second);
57 return JSIterator::CreateIterResultObject(thread, value, false).GetTaggedValue();
58 }
59
CreateListIterator(JSThread * thread,JSHandle<JSTaggedValue> & obj)60 JSHandle<JSTaggedValue> JSAPIListIterator::CreateListIterator(JSThread *thread, JSHandle<JSTaggedValue> &obj)
61 {
62 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
63 if (!obj->IsJSAPIList()) {
64 if (obj->IsJSProxy() && JSHandle<JSProxy>::Cast(obj)->GetTarget(thread).IsJSAPIList()) {
65 obj = JSHandle<JSTaggedValue>(thread, JSHandle<JSProxy>::Cast(obj)->GetTarget(thread));
66 } else {
67 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
68 "The Symbol.iterator method cannot be bound");
69 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error,
70 JSHandle<JSTaggedValue>(thread, JSTaggedValue::Exception()));
71 }
72 }
73 JSHandle<JSTaggedValue> iter(factory->NewJSAPIListIterator(JSHandle<JSAPIList>(obj)));
74 return iter;
75 }
76 } // namespace panda::ecmascript
77