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_vector_iterator.h"
17
18 #include "ecmascript/base/typed_array_helper.h"
19 #include "ecmascript/js_api/js_api_vector.h"
20
21 namespace panda::ecmascript {
22 using BuiltinsBase = base::BuiltinsBase;
23 // VectorIteratorPrototype%.next ( )
Next(EcmaRuntimeCallInfo * argv)24 JSTaggedValue JSAPIVectorIterator::Next(EcmaRuntimeCallInfo *argv)
25 {
26 ASSERT(argv);
27 JSThread *thread = argv->GetThread();
28 [[maybe_unused]] EcmaHandleScope handleScope(thread);
29 JSHandle<JSTaggedValue> input(BuiltinsBase::GetThis(argv));
30
31 if (!input->IsJSAPIVectorIterator()) {
32 THROW_TYPE_ERROR_AND_RETURN(thread, "this value is not an vector iterator", JSTaggedValue::Exception());
33 }
34 JSHandle<JSAPIVectorIterator> iter(input);
35 // Let a be O.[[IteratedVectorLike]].
36 JSHandle<JSTaggedValue> vector(thread, iter->GetIteratedVector());
37 // If a is undefined, return an undefinedIteratorResult.
38 if (vector->IsUndefined()) {
39 return thread->GlobalConstants()->GetUndefinedIterResult();
40 }
41 // Let index be O.[[VectorLikeNextIndex]].
42 uint32_t index = iter->GetNextIndex();
43 // If a has a [[TypedVectorName]] internal slot, then
44 // Let len be the value of O’s [[VectorLength]] internal slot.
45 ASSERT(vector->IsJSAPIVector());
46 const uint32_t length = static_cast<uint32_t>(JSHandle<JSAPIVector>::Cast(vector)->GetSize());
47 // If index >= len, then
48 if (index >= length) {
49 // Set O.[[IteratedVectorLike]] to undefined.
50 // Return undefinedIteratorResult.
51 JSHandle<JSTaggedValue> undefinedHandle = thread->GlobalConstants()->GetHandledUndefined();
52 iter->SetIteratedVector(thread, undefinedHandle);
53 return thread->GlobalConstants()->GetUndefinedIterResult();
54 }
55 // Set O.[[VectorLikeNextIndex]] to index + 1.
56 iter->SetNextIndex(index + 1);
57 JSHandle<JSTaggedValue> value(thread, JSAPIVector::Get(thread, JSHandle<JSAPIVector>::Cast(vector),
58 static_cast<int32_t>(index)));
59 return JSIterator::CreateIterResultObject(thread, value, false).GetTaggedValue();
60 }
61 } // namespace panda::ecmascript
62