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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_ELEMENTS_H_ | 5 #ifndef V8_ELEMENTS_H_ |
6 #define V8_ELEMENTS_H_ | 6 #define V8_ELEMENTS_H_ |
7 | 7 |
8 #include "src/elements-kind.h" | 8 #include "src/elements-kind.h" |
9 #include "src/heap/heap.h" | 9 #include "src/heap/heap.h" |
10 #include "src/isolate.h" | 10 #include "src/isolate.h" |
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163 Handle<Object> value, uint32_t start, | 163 Handle<Object> value, uint32_t start, |
164 uint32_t length) = 0; | 164 uint32_t length) = 0; |
165 | 165 |
166 // Check an Object's own elements for the index of an element (using SameValue | 166 // Check an Object's own elements for the index of an element (using SameValue |
167 // semantics) | 167 // semantics) |
168 virtual Maybe<int64_t> IndexOfValue(Isolate* isolate, | 168 virtual Maybe<int64_t> IndexOfValue(Isolate* isolate, |
169 Handle<JSObject> receiver, | 169 Handle<JSObject> receiver, |
170 Handle<Object> value, uint32_t start, | 170 Handle<Object> value, uint32_t start, |
171 uint32_t length) = 0; | 171 uint32_t length) = 0; |
172 | 172 |
173 virtual void CopyElements(Handle<FixedArrayBase> source, | |
174 ElementsKind source_kind, | |
175 Handle<FixedArrayBase> destination, int size) = 0; | |
176 | |
177 protected: | 173 protected: |
178 friend class LookupIterator; | 174 friend class LookupIterator; |
179 | 175 |
180 // Element handlers distinguish between entries and indices when they | 176 // Element handlers distinguish between entries and indices when they |
181 // manipulate elements. Entries refer to elements in terms of their location | 177 // manipulate elements. Entries refer to elements in terms of their location |
182 // in the underlying storage's backing store representation, and are between 0 | 178 // in the underlying storage's backing store representation, and are between 0 |
183 // and GetCapacity. Indices refer to elements in terms of the value that would | 179 // and GetCapacity. Indices refer to elements in terms of the value that would |
184 // be specified in JavaScript to access the element. In most implementations, | 180 // be specified in JavaScript to access the element. In most implementations, |
185 // indices are equivalent to entries. In the NumberDictionary | 181 // indices are equivalent to entries. In the NumberDictionary |
186 // ElementsAccessor, entries are mapped to an index using the KeyAt method on | 182 // ElementsAccessor, entries are mapped to an index using the KeyAt method on |
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209 bool allow_appending = false); | 205 bool allow_appending = false); |
210 | 206 |
211 MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements( | 207 MUST_USE_RESULT MaybeHandle<Object> ArrayConstructInitializeElements( |
212 Handle<JSArray> array, | 208 Handle<JSArray> array, |
213 Arguments* args); | 209 Arguments* args); |
214 | 210 |
215 } // namespace internal | 211 } // namespace internal |
216 } // namespace v8 | 212 } // namespace v8 |
217 | 213 |
218 #endif // V8_ELEMENTS_H_ | 214 #endif // V8_ELEMENTS_H_ |
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