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_linked_list_iterator.h"
17
18 #include "ecmascript/containers/containers_errors.h"
19 #include "ecmascript/global_env.h"
20 #include "ecmascript/js_array.h"
21 #include "ecmascript/tagged_list.h"
22
23 namespace panda::ecmascript {
24 using BuiltinsBase = base::BuiltinsBase;
25 using ContainerError = containers::ContainerError;
26 using ErrorFlag = containers::ErrorFlag;
Next(EcmaRuntimeCallInfo * argv)27 JSTaggedValue JSAPILinkedListIterator::Next(EcmaRuntimeCallInfo *argv)
28 {
29 ASSERT(argv);
30 JSThread *thread = argv->GetThread();
31 [[maybe_unused]] EcmaHandleScope handleScope(thread);
32 JSHandle<JSTaggedValue> input(BuiltinsBase::GetThis(argv));
33 if (!input->IsJSAPILinkedListIterator()) {
34 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
35 "The Symbol.iterator method cannot be bound");
36 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error, JSTaggedValue::Exception());
37 }
38 JSHandle<JSAPILinkedListIterator> iter(input);
39 JSHandle<JSTaggedValue> linkedList(thread, iter->GetIteratedLinkedList(thread));
40 JSHandle<TaggedDoubleList> list(linkedList);
41 if (linkedList->IsUndefined()) {
42 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
43 return env->GetUndefinedIteratorResult().GetTaggedValue();
44 }
45 int index = static_cast<int>(iter->GetNextIndex());
46 int length = list->Length();
47 if (index >= length) {
48 JSHandle<JSTaggedValue> undefinedHandle = thread->GlobalConstants()->GetHandledUndefined();
49 iter->SetIteratedLinkedList(thread, undefinedHandle);
50 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
51 return env->GetUndefinedIteratorResult().GetTaggedValue();
52 }
53 iter->SetNextIndex(index + 1);
54 int dataIndex = static_cast<int>(iter->GetDataIndex());
55 std::pair<int, JSTaggedValue> resultPair = list->GetByDataIndex(thread, dataIndex);
56 iter->SetDataIndex(resultPair.first);
57 JSHandle<JSTaggedValue> value(thread, resultPair.second);
58 return JSIterator::CreateIterResultObject(thread, value, false).GetTaggedValue();
59 }
60
CreateLinkedListIterator(JSThread * thread,JSHandle<JSTaggedValue> & obj)61 JSHandle<JSTaggedValue> JSAPILinkedListIterator::CreateLinkedListIterator(JSThread *thread,
62 JSHandle<JSTaggedValue> &obj)
63 {
64 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
65 if (!obj->IsJSAPILinkedList()) {
66 if (obj->IsJSProxy() && JSHandle<JSProxy>::Cast(obj)->GetTarget(thread).IsJSAPILinkedList()) {
67 obj = JSHandle<JSTaggedValue>(thread, JSHandle<JSProxy>::Cast(obj)->GetTarget(thread));
68 } else {
69 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
70 "The Symbol.iterator method cannot be bound");
71 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error,
72 JSHandle<JSTaggedValue>(thread, JSTaggedValue::Exception()));
73 }
74 }
75 JSHandle<JSTaggedValue> iter(factory->NewJSAPILinkedListIterator(JSHandle<JSAPILinkedList>(obj)));
76 return iter;
77 }
78 } // namespace panda::ecmascript
79