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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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72 // element. This method doesn't iterate up the prototype chain. The caller | 72 // element. This method doesn't iterate up the prototype chain. The caller |
73 // can optionally pass in the backing store to use for the check, which must | 73 // can optionally pass in the backing store to use for the check, which must |
74 // be compatible with the ElementsKind of the ElementsAccessor. If | 74 // be compatible with the ElementsKind of the ElementsAccessor. If |
75 // backing_store is NULL, the holder->elements() is used as the backing store. | 75 // backing_store is NULL, the holder->elements() is used as the backing store. |
76 MUST_USE_RESULT virtual Handle<Object> Get( | 76 MUST_USE_RESULT virtual Handle<Object> Get( |
77 Handle<Object> receiver, | 77 Handle<Object> receiver, |
78 Handle<JSObject> holder, | 78 Handle<JSObject> holder, |
79 uint32_t key, | 79 uint32_t key, |
80 Handle<FixedArrayBase> backing_store) = 0; | 80 Handle<FixedArrayBase> backing_store) = 0; |
81 | 81 |
82 MUST_USE_RESULT virtual Handle<Object> Get( | 82 MUST_USE_RESULT inline Handle<Object> Get( |
83 Handle<Object> receiver, | 83 Handle<Object> receiver, |
84 Handle<JSObject> holder, | 84 Handle<JSObject> holder, |
85 uint32_t key) = 0; | 85 uint32_t key) { |
86 | 86 return Get(receiver, holder, key, handle(holder->elements())); |
87 MUST_USE_RESULT virtual MaybeObject* Get( | 87 } |
88 Object* receiver, | |
89 JSObject* holder, | |
90 uint32_t key, | |
91 FixedArrayBase* backing_store = NULL) = 0; | |
92 | 88 |
93 // Returns an element's attributes, or ABSENT if there is no such | 89 // Returns an element's attributes, or ABSENT if there is no such |
94 // element. This method doesn't iterate up the prototype chain. The caller | 90 // element. This method doesn't iterate up the prototype chain. The caller |
95 // can optionally pass in the backing store to use for the check, which must | 91 // can optionally pass in the backing store to use for the check, which must |
96 // be compatible with the ElementsKind of the ElementsAccessor. If | 92 // be compatible with the ElementsKind of the ElementsAccessor. If |
97 // backing_store is NULL, the holder->elements() is used as the backing store. | 93 // backing_store is NULL, the holder->elements() is used as the backing store. |
98 MUST_USE_RESULT virtual PropertyAttributes GetAttributes( | 94 MUST_USE_RESULT virtual PropertyAttributes GetAttributes( |
99 Object* receiver, | 95 Handle<Object> receiver, |
100 JSObject* holder, | 96 Handle<JSObject> holder, |
101 uint32_t key, | 97 uint32_t key, |
102 FixedArrayBase* backing_store = NULL) = 0; | 98 Handle<FixedArrayBase> backing_store) = 0; |
| 99 |
| 100 MUST_USE_RESULT inline PropertyAttributes GetAttributes( |
| 101 Handle<Object> receiver, |
| 102 Handle<JSObject> holder, |
| 103 uint32_t key) { |
| 104 return GetAttributes(receiver, holder, key, handle(holder->elements())); |
| 105 } |
103 | 106 |
104 // Returns an element's type, or NONEXISTENT if there is no such | 107 // Returns an element's type, or NONEXISTENT if there is no such |
105 // element. This method doesn't iterate up the prototype chain. The caller | 108 // element. This method doesn't iterate up the prototype chain. The caller |
106 // can optionally pass in the backing store to use for the check, which must | 109 // can optionally pass in the backing store to use for the check, which must |
107 // be compatible with the ElementsKind of the ElementsAccessor. If | 110 // be compatible with the ElementsKind of the ElementsAccessor. If |
108 // backing_store is NULL, the holder->elements() is used as the backing store. | 111 // backing_store is NULL, the holder->elements() is used as the backing store. |
109 MUST_USE_RESULT virtual PropertyType GetType( | 112 MUST_USE_RESULT virtual PropertyType GetType( |
110 Object* receiver, | 113 Handle<Object> receiver, |
111 JSObject* holder, | 114 Handle<JSObject> holder, |
112 uint32_t key, | 115 uint32_t key, |
113 FixedArrayBase* backing_store = NULL) = 0; | 116 Handle<FixedArrayBase> backing_store) = 0; |
| 117 |
| 118 MUST_USE_RESULT inline PropertyType GetType( |
| 119 Handle<Object> receiver, |
| 120 Handle<JSObject> holder, |
| 121 uint32_t key) { |
| 122 return GetType(receiver, holder, key, handle(holder->elements())); |
| 123 } |
114 | 124 |
115 // Returns an element's accessors, or NULL if the element does not exist or | 125 // Returns an element's accessors, or NULL if the element does not exist or |
116 // is plain. This method doesn't iterate up the prototype chain. The caller | 126 // is plain. This method doesn't iterate up the prototype chain. The caller |
117 // can optionally pass in the backing store to use for the check, which must | 127 // can optionally pass in the backing store to use for the check, which must |
118 // be compatible with the ElementsKind of the ElementsAccessor. If | 128 // be compatible with the ElementsKind of the ElementsAccessor. If |
119 // backing_store is NULL, the holder->elements() is used as the backing store. | 129 // backing_store is NULL, the holder->elements() is used as the backing store. |
120 MUST_USE_RESULT virtual AccessorPair* GetAccessorPair( | 130 MUST_USE_RESULT virtual AccessorPair* GetAccessorPair( |
121 Object* receiver, | 131 Object* receiver, |
122 JSObject* holder, | 132 JSObject* holder, |
123 uint32_t key, | 133 uint32_t key, |
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227 // elements. Indexes refer to elements in terms of their location in the | 237 // elements. Indexes refer to elements in terms of their location in the |
228 // underlying storage's backing store representation, and are between 0 and | 238 // underlying storage's backing store representation, and are between 0 and |
229 // GetCapacity. Keys refer to elements in terms of the value that would be | 239 // GetCapacity. Keys refer to elements in terms of the value that would be |
230 // specified in JavaScript to access the element. In most implementations, | 240 // specified in JavaScript to access the element. In most implementations, |
231 // keys are equivalent to indexes, and GetKeyForIndex returns the same value | 241 // keys are equivalent to indexes, and GetKeyForIndex returns the same value |
232 // it is passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps | 242 // it is passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps |
233 // the index to a key using the KeyAt method on the NumberDictionary. | 243 // the index to a key using the KeyAt method on the NumberDictionary. |
234 virtual uint32_t GetKeyForIndex(Handle<FixedArrayBase> backing_store, | 244 virtual uint32_t GetKeyForIndex(Handle<FixedArrayBase> backing_store, |
235 uint32_t index) = 0; | 245 uint32_t index) = 0; |
236 | 246 |
| 247 // TODO(ishell): Non-handlified versions, used only by accessors' |
| 248 // implementations. To be removed once elements.cc is handlified. |
| 249 MUST_USE_RESULT virtual MaybeObject* Get( |
| 250 Object* receiver, |
| 251 JSObject* holder, |
| 252 uint32_t key, |
| 253 FixedArrayBase* backing_store) = 0; |
| 254 |
| 255 MUST_USE_RESULT virtual PropertyAttributes GetAttributes( |
| 256 Object* receiver, |
| 257 JSObject* holder, |
| 258 uint32_t key, |
| 259 FixedArrayBase* backing_store) = 0; |
| 260 |
| 261 MUST_USE_RESULT virtual PropertyType GetType( |
| 262 Object* receiver, |
| 263 JSObject* holder, |
| 264 uint32_t key, |
| 265 FixedArrayBase* backing_store) = 0; |
| 266 |
237 private: | 267 private: |
238 static ElementsAccessor** elements_accessors_; | 268 static ElementsAccessor** elements_accessors_; |
239 const char* name_; | 269 const char* name_; |
240 | 270 |
241 DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); | 271 DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); |
242 }; | 272 }; |
243 | 273 |
244 void CheckArrayAbuse(JSObject* obj, const char* op, uint32_t key, | 274 void CheckArrayAbuse(JSObject* obj, const char* op, uint32_t key, |
245 bool allow_appending = false); | 275 bool allow_appending = false); |
246 | 276 |
247 Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array, | 277 Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array, |
248 Arguments* args); | 278 Arguments* args); |
249 | 279 |
250 } } // namespace v8::internal | 280 } } // namespace v8::internal |
251 | 281 |
252 #endif // V8_ELEMENTS_H_ | 282 #endif // V8_ELEMENTS_H_ |
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