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_stack_iterator.h"
17
18 #include "ecmascript/base/typed_array_helper-inl.h"
19 #include "ecmascript/containers/containers_errors.h"
20
21 namespace panda::ecmascript {
22 using BuiltinsBase = base::BuiltinsBase;
23 using ContainerError = containers::ContainerError;
24 using ErrorFlag = containers::ErrorFlag;
25 // StackIteratorPrototype%.next()
Next(EcmaRuntimeCallInfo * argv)26 JSTaggedValue JSAPIStackIterator::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
33 if (!input->IsJSAPIStackIterator()) {
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<JSAPIStackIterator> iter(input);
39 JSHandle<JSTaggedValue> stack(thread, iter->GetIteratedStack());
40 const GlobalEnvConstants *globalConst = thread->GlobalConstants();
41 if (stack->IsUndefined()) {
42 return globalConst->GetUndefinedIterResult();
43 }
44 uint32_t index = iter->GetNextIndex();
45
46 uint32_t length = static_cast<uint32_t>((JSHandle<JSAPIStack>::Cast(stack))->GetSize() + 1);
47
48 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
49
50 if (index + 1 > length) {
51 JSHandle<JSTaggedValue> undefinedHandle = globalConst->GetHandledUndefined();
52 iter->SetIteratedStack(thread, undefinedHandle);
53 return globalConst->GetUndefinedIterResult();
54 }
55 iter->SetNextIndex(index + 1);
56 JSHandle<JSTaggedValue> key(thread, JSTaggedValue(index));
57 JSHandle<JSTaggedValue> value(thread, JSHandle<JSAPIStack>::Cast(stack)->Get(index));
58 return JSIterator::CreateIterResultObject(thread, value, false).GetTaggedValue();
59 }
60 } // namespace panda::ecmascript
61