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 #ifndef ECMASCRIPT_LEXICALENV_H
17 #define ECMASCRIPT_LEXICALENV_H
18 
19 #include "ecmascript/js_object.h"
20 #include "ecmascript/tagged_array-inl.h"
21 
22 namespace panda::ecmascript {
23 class LexicalEnv : public TaggedArray {
24 public:
25     static constexpr uint32_t PARENT_ENV_INDEX = 0;
26     static constexpr uint32_t SCOPE_INFO_INDEX = 1;
27     static constexpr uint32_t RESERVED_ENV_LENGTH = 2;
28 
Cast(TaggedObject *object)29     static LexicalEnv *Cast(TaggedObject *object)
30     {
31         ASSERT(JSTaggedValue(object).IsTaggedArray());
32         return static_cast<LexicalEnv *>(object);
33     }
34 
ComputeSize(uint32_t numSlots)35     static size_t ComputeSize(uint32_t numSlots)
36     {
37         return TaggedArray::ComputeSize(JSTaggedValue::TaggedTypeSize(), numSlots + RESERVED_ENV_LENGTH);
38     }
39 
SetParentEnv(JSThread *thread, JSTaggedValue value)40     void SetParentEnv(JSThread *thread, JSTaggedValue value)
41     {
42         Set(thread, PARENT_ENV_INDEX, value);
43     }
44 
GetParentEnv() const45     JSTaggedValue GetParentEnv() const
46     {
47         return Get(PARENT_ENV_INDEX);
48     }
49 
GetProperties(uint32_t index) const50     JSTaggedValue GetProperties(uint32_t index) const
51     {
52         return Get(index + RESERVED_ENV_LENGTH);
53     }
54 
SetProperties(JSThread *thread, uint32_t index, JSTaggedValue value)55     void SetProperties(JSThread *thread, uint32_t index, JSTaggedValue value)
56     {
57         Set(thread, index + RESERVED_ENV_LENGTH, value);
58     }
59 
GetScopeInfo() const60     JSTaggedValue GetScopeInfo() const
61     {
62         return Get(SCOPE_INFO_INDEX);
63     }
64 
SetScopeInfo(JSThread *thread, JSTaggedValue value)65     void SetScopeInfo(JSThread *thread, JSTaggedValue value)
66     {
67         Set(thread, SCOPE_INFO_INDEX, value);
68     }
69 
70     DECL_DUMP()
71 };
72 }  // namespace panda::ecmascript
73 #endif  // ECMASCRIPT_LEXICALENV_H
74