1 /* 2 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef JSPropertyNameIterator_h 30 #define JSPropertyNameIterator_h 31 32 #include "JSObject.h" 33 #include "JSString.h" 34 #include "Operations.h" 35 #include "PropertyNameArray.h" 36 37 namespace JSC { 38 39 class Identifier; 40 class JSObject; 41 42 class JSPropertyNameIterator : public JSCell { 43 friend class JIT; 44 45 public: 46 static JSPropertyNameIterator* create(ExecState*, JSObject*); 47 createStructure(JSValue prototype)48 static PassRefPtr<Structure> createStructure(JSValue prototype) 49 { 50 return Structure::create(prototype, TypeInfo(CompoundType, OverridesMarkChildren), AnonymousSlotCount); 51 } 52 53 virtual ~JSPropertyNameIterator(); 54 isPropertyNameIterator()55 virtual bool isPropertyNameIterator() const { return true; } 56 57 virtual void markChildren(MarkStack&); 58 getOffset(size_t i,int & offset)59 bool getOffset(size_t i, int& offset) 60 { 61 if (i >= m_numCacheableSlots) 62 return false; 63 offset = i; 64 return true; 65 } 66 67 JSValue get(ExecState*, JSObject*, size_t i); size()68 size_t size() { return m_jsStringsSize; } 69 setCachedStructure(Structure * structure)70 void setCachedStructure(Structure* structure) { m_cachedStructure = structure; } cachedStructure()71 Structure* cachedStructure() { return m_cachedStructure; } 72 setCachedPrototypeChain(NonNullPassRefPtr<StructureChain> cachedPrototypeChain)73 void setCachedPrototypeChain(NonNullPassRefPtr<StructureChain> cachedPrototypeChain) { m_cachedPrototypeChain = cachedPrototypeChain; } cachedPrototypeChain()74 StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); } 75 76 private: 77 JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot); 78 79 Structure* m_cachedStructure; 80 RefPtr<StructureChain> m_cachedPrototypeChain; 81 uint32_t m_numCacheableSlots; 82 uint32_t m_jsStringsSize; 83 OwnArrayPtr<JSValue> m_jsStrings; 84 }; 85 setEnumerationCache(JSPropertyNameIterator * enumerationCache)86 inline void Structure::setEnumerationCache(JSPropertyNameIterator* enumerationCache) 87 { 88 ASSERT(!isDictionary()); 89 m_enumerationCache = enumerationCache; 90 } 91 clearEnumerationCache(JSPropertyNameIterator * enumerationCache)92 inline void Structure::clearEnumerationCache(JSPropertyNameIterator* enumerationCache) 93 { 94 m_enumerationCache.clear(enumerationCache); 95 } 96 enumerationCache()97 inline JSPropertyNameIterator* Structure::enumerationCache() 98 { 99 return m_enumerationCache.get(); 100 } 101 102 } // namespace JSC 103 104 #endif // JSPropertyNameIterator_h 105