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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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| 219 return AddElementsToFixedArray( | 219 return AddElementsToFixedArray( |
| 220 receiver, holder, to, handle(holder->elements())); | 220 receiver, holder, to, handle(holder->elements())); |
| 221 } | 221 } |
| 222 | 222 |
| 223 // Returns a shared ElementsAccessor for the specified ElementsKind. | 223 // Returns a shared ElementsAccessor for the specified ElementsKind. |
| 224 static ElementsAccessor* ForKind(ElementsKind elements_kind) { | 224 static ElementsAccessor* ForKind(ElementsKind elements_kind) { |
| 225 ASSERT(elements_kind < kElementsKindCount); | 225 ASSERT(elements_kind < kElementsKindCount); |
| 226 return elements_accessors_[elements_kind]; | 226 return elements_accessors_[elements_kind]; |
| 227 } | 227 } |
| 228 | 228 |
| 229 static ElementsAccessor* ForArray(Handle<FixedArrayBase> array); | 229 // TODO(ishell): Temporary wrapper until handlified. |
| 230 inline static ElementsAccessor* ForArray(Handle<FixedArrayBase> array) { |
| 231 return ForArray(*array); |
| 232 } |
| 233 static ElementsAccessor* ForArray(FixedArrayBase* array); |
| 230 | 234 |
| 231 static void InitializeOncePerProcess(); | 235 static void InitializeOncePerProcess(); |
| 232 static void TearDown(); | 236 static void TearDown(); |
| 233 | 237 |
| 234 protected: | 238 protected: |
| 235 friend class SloppyArgumentsElementsAccessor; | 239 friend class SloppyArgumentsElementsAccessor; |
| 236 | 240 |
| 237 virtual uint32_t GetCapacity(Handle<FixedArrayBase> backing_store) = 0; | 241 virtual uint32_t GetCapacity(FixedArrayBase* backing_store) = 0; |
| 238 | 242 |
| 239 // Element handlers distinguish between indexes and keys when they manipulate | 243 // Element handlers distinguish between indexes and keys when they manipulate |
| 240 // elements. Indexes refer to elements in terms of their location in the | 244 // elements. Indexes refer to elements in terms of their location in the |
| 241 // underlying storage's backing store representation, and are between 0 and | 245 // underlying storage's backing store representation, and are between 0 and |
| 242 // GetCapacity. Keys refer to elements in terms of the value that would be | 246 // GetCapacity. Keys refer to elements in terms of the value that would be |
| 243 // specified in JavaScript to access the element. In most implementations, | 247 // specified in JavaScript to access the element. In most implementations, |
| 244 // keys are equivalent to indexes, and GetKeyForIndex returns the same value | 248 // keys are equivalent to indexes, and GetKeyForIndex returns the same value |
| 245 // it is passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps | 249 // it is passed. In the NumberDictionary ElementsAccessor, GetKeyForIndex maps |
| 246 // the index to a key using the KeyAt method on the NumberDictionary. | 250 // the index to a key using the KeyAt method on the NumberDictionary. |
| 247 virtual uint32_t GetKeyForIndex(Handle<FixedArrayBase> backing_store, | 251 virtual uint32_t GetKeyForIndex(Handle<FixedArrayBase> backing_store, |
| 248 uint32_t index) = 0; | 252 uint32_t index) = 0; |
| 249 | 253 |
| 254 // TODO(ishell): Non-handlified versions, used only by accessors' |
| 255 // implementations. To be removed once elements.cc is handlified. |
| 256 MUST_USE_RESULT virtual PropertyAttributes GetAttributes( |
| 257 Object* receiver, |
| 258 JSObject* holder, |
| 259 uint32_t key, |
| 260 FixedArrayBase* backing_store) = 0; |
| 261 |
| 262 MUST_USE_RESULT virtual PropertyType GetType( |
| 263 Object* receiver, |
| 264 JSObject* holder, |
| 265 uint32_t key, |
| 266 FixedArrayBase* backing_store) = 0; |
| 267 |
| 250 private: | 268 private: |
| 251 static ElementsAccessor** elements_accessors_; | 269 static ElementsAccessor** elements_accessors_; |
| 252 const char* name_; | 270 const char* name_; |
| 253 | 271 |
| 254 DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); | 272 DISALLOW_COPY_AND_ASSIGN(ElementsAccessor); |
| 255 }; | 273 }; |
| 256 | 274 |
| 257 void CheckArrayAbuse(Handle<JSObject> obj, const char* op, uint32_t key, | 275 void CheckArrayAbuse(Handle<JSObject> obj, const char* op, uint32_t key, |
| 258 bool allow_appending = false); | 276 bool allow_appending = false); |
| 259 | 277 |
| 260 Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array, | 278 Handle<Object> ArrayConstructInitializeElements(Handle<JSArray> array, |
| 261 Arguments* args); | 279 Arguments* args); |
| 262 | 280 |
| 263 } } // namespace v8::internal | 281 } } // namespace v8::internal |
| 264 | 282 |
| 265 #endif // V8_ELEMENTS_H_ | 283 #endif // V8_ELEMENTS_H_ |
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