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_tree_set_iterator.h"
17
18 #include "ecmascript/base/builtins_base.h"
19 #include "ecmascript/containers/containers_errors.h"
20 #include "ecmascript/js_api/js_api_tree_set.h"
21 #include "ecmascript/js_array.h"
22 #include "ecmascript/object_factory.h"
23 #include "ecmascript/tagged_tree.h"
24
25 namespace panda::ecmascript {
26 using BuiltinsBase = base::BuiltinsBase;
27 using ContainerError = containers::ContainerError;
28 using ErrorFlag = containers::ErrorFlag;
Next(EcmaRuntimeCallInfo * argv)29 JSTaggedValue JSAPITreeSetIterator::Next(EcmaRuntimeCallInfo *argv)
30 {
31 ASSERT(argv);
32 JSThread *thread = argv->GetThread();
33 [[maybe_unused]] EcmaHandleScope handleScope(thread);
34 // Let input be the this value
35 JSHandle<JSTaggedValue> input(BuiltinsBase::GetThis(argv));
36
37 if (!input->IsJSAPITreeSetIterator()) {
38 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
39 "The Symbol.iterator method cannot be bound");
40 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error, JSTaggedValue::Exception());
41 }
42 JSHandle<JSAPITreeSetIterator> iter(input);
43 // Let it be [[IteratedSet]].
44 JSHandle<JSTaggedValue> iteratedSet(thread, iter->GetIteratedSet());
45
46 // If it is undefined, return undefinedIteratorResult.
47 const GlobalEnvConstants *globalConst = thread->GlobalConstants();
48 if (iteratedSet->IsUndefined()) {
49 return globalConst->GetUndefinedIterResult();
50 }
51 JSHandle<TaggedTreeSet> set(thread, JSHandle<JSAPITreeSet>::Cast(iteratedSet)->GetTreeSet());
52 uint32_t elements = static_cast<uint32_t>(set->NumberOfElements());
53
54 JSMutableHandle<TaggedArray> entries(thread, iter->GetEntries());
55 if ((iter->GetEntries().IsHole()) || (elements != entries->GetLength())) {
56 entries.Update(TaggedTreeSet::GetArrayFromSet(thread, set).GetTaggedValue());
57 iter->SetEntries(thread, entries);
58 }
59
60 // Let index be Set.[[NextIndex]].
61 uint32_t index = static_cast<uint32_t>(iter->GetNextIndex());
62 if (index < elements) {
63 IterationKind itemKind = IterationKind(iter->GetIterationKind());
64
65 int keyIndex = entries->Get(index).GetInt();
66 iter->SetNextIndex(index + 1);
67
68 JSHandle<JSTaggedValue> key(thread, set->GetKey(keyIndex));
69 // If itemKind is key or value, let result be e.[[Key]].
70 if (itemKind == IterationKind::VALUE || itemKind == IterationKind::KEY) {
71 return JSIterator::CreateIterResultObject(thread, key, false).GetTaggedValue();
72 }
73 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
74 JSHandle<TaggedArray> array = factory->NewTaggedArray(2); // 2 means the length of array
75 array->Set(thread, 0, key);
76 array->Set(thread, 1, key);
77 JSHandle<JSTaggedValue> keyAndValue(JSArray::CreateArrayFromList(thread, array));
78 return JSIterator::CreateIterResultObject(thread, keyAndValue, false).GetTaggedValue();
79 }
80
81 // Set [[IteratedSet]] to undefined.
82 iter->SetIteratedSet(thread, JSTaggedValue::Undefined());
83 return globalConst->GetUndefinedIterResult();
84 }
85
CreateTreeSetIterator(JSThread * thread,JSHandle<JSTaggedValue> & obj,IterationKind kind)86 JSHandle<JSTaggedValue> JSAPITreeSetIterator::CreateTreeSetIterator(JSThread *thread,
87 JSHandle<JSTaggedValue> &obj,
88 IterationKind kind)
89 {
90 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
91 if (!obj->IsJSAPITreeSet()) {
92 if (obj->IsJSProxy() && JSHandle<JSProxy>::Cast(obj)->GetTarget().IsJSAPITreeSet()) {
93 obj = JSHandle<JSTaggedValue>(thread, JSHandle<JSProxy>::Cast(obj)->GetTarget());
94 } else {
95 JSTaggedValue error = ContainerError::BusinessError(thread, ErrorFlag::BIND_ERROR,
96 "The Symbol.iterator method cannot be bound");
97 THROW_NEW_ERROR_AND_RETURN_VALUE(thread, error,
98 JSHandle<JSTaggedValue>(thread, JSTaggedValue::Exception()));
99 }
100 }
101 JSHandle<JSTaggedValue> iter(factory->NewJSAPITreeSetIterator(JSHandle<JSAPITreeSet>(obj), kind));
102 return iter;
103 }
104 } // namespace panda::ecmascript
105