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 #include "ecmascript/global_env.h"
21
22 namespace panda::ecmascript {
23 using BuiltinsBase = base::BuiltinsBase;
24 using ContainerError = containers::ContainerError;
25 using ErrorFlag = containers::ErrorFlag;
26 // StackIteratorPrototype%.next()
Next(EcmaRuntimeCallInfo * argv)27 JSTaggedValue JSAPIStackIterator::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
34 if (!input->IsJSAPIStackIterator()) {
35 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
36 "The Symbol.iterator method cannot be bound");
37 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error, JSTaggedValue::Exception());
38 }
39 JSHandle<JSAPIStackIterator> iter(input);
40 JSHandle<JSTaggedValue> stack(thread, iter->GetIteratedStack(thread));
41 if (stack->IsUndefined()) {
42 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
43 return env->GetUndefinedIteratorResult().GetTaggedValue();
44 }
45 uint32_t index = iter->GetNextIndex();
46
47 uint32_t length = static_cast<uint32_t>((JSHandle<JSAPIStack>::Cast(stack))->GetSize() + 1);
48
49 RETURN_EXCEPTION_IF_ABRUPT_COMPLETION(thread);
50
51 if (index + 1 > length) {
52 JSHandle<JSTaggedValue> undefinedHandle = thread->GlobalConstants()->GetHandledUndefined();
53 iter->SetIteratedStack(thread, undefinedHandle);
54 JSHandle<GlobalEnv> env = thread->GetEcmaVM()->GetGlobalEnv();
55 return env->GetUndefinedIteratorResult().GetTaggedValue();
56 }
57 iter->SetNextIndex(index + 1);
58 JSHandle<JSTaggedValue> key(thread, JSTaggedValue(index));
59 JSHandle<JSTaggedValue> value(thread, JSHandle<JSAPIStack>::Cast(stack)->Get(thread, index));
60 return JSIterator::CreateIterResultObject(thread, value, false).GetTaggedValue();
61 }
62 } // namespace panda::ecmascript
63