1 /*
2 * Copyright (c) 2021 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/ic/proto_change_details.h"
17 namespace panda::ecmascript {
Add(const JSThread * thread,const JSHandle<ChangeListener> & array,const JSHandle<JSHClass> & value,uint32_t * index)18 JSHandle<ChangeListener> ChangeListener::Add(const JSThread *thread, const JSHandle<ChangeListener> &array,
19 const JSHandle<JSHClass> &value, uint32_t *index)
20 {
21 JSTaggedValue weakValue;
22 if (!array->Full()) {
23 weakValue = JSTaggedValue(value.GetTaggedValue().CreateAndGetWeakRef());
24 uint32_t arrayIndex = array->PushBack(thread, weakValue);
25 if (arrayIndex != TaggedArray::MAX_ARRAY_INDEX) {
26 if (index != nullptr) {
27 *index = arrayIndex;
28 }
29 return array;
30 }
31 LOG_ECMA(FATAL) << "this branch is unreachable";
32 UNREACHABLE();
33 }
34 // if exist hole, use it.
35 uint32_t holeIndex = CheckHole(array);
36 if (holeIndex != TaggedArray::MAX_ARRAY_INDEX) {
37 weakValue = JSTaggedValue(value.GetTaggedValue().CreateAndGetWeakRef());
38 array->Set(thread, holeIndex, weakValue);
39 if (index != nullptr) {
40 *index = holeIndex;
41 }
42 return array;
43 }
44 // the vector is full and no hole exists.
45 JSHandle<WeakVector> newArray = WeakVector::Grow(thread, JSHandle<WeakVector>(array), array->GetCapacity() + 1);
46 weakValue = JSTaggedValue(value.GetTaggedValue().CreateAndGetWeakRef());
47 uint32_t arrayIndex = newArray->PushBack(thread, weakValue);
48 ASSERT(arrayIndex != TaggedArray::MAX_ARRAY_INDEX);
49 if (index != nullptr) {
50 *index = arrayIndex;
51 }
52 return JSHandle<ChangeListener>(newArray);
53 }
54
CheckHole(const JSHandle<ChangeListener> & array)55 uint32_t ChangeListener::CheckHole(const JSHandle<ChangeListener> &array)
56 {
57 for (uint32_t i = 0; i < array->GetEnd(); i++) {
58 JSTaggedValue value = array->Get(i);
59 if (value.IsHole() || value.IsUndefined()) {
60 return i;
61 }
62 }
63 return TaggedArray::MAX_ARRAY_INDEX;
64 }
65
Get(uint32_t index)66 JSTaggedValue ChangeListener::Get(uint32_t index)
67 {
68 JSTaggedValue value = WeakVector::Get(index);
69 if (!value.IsHeapObject()) {
70 return value;
71 }
72 return JSTaggedValue(value.GetTaggedWeakRef());
73 }
74 } // namespace panda::ecmascript