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(JSGlobalData & globalData,JSValue prototype)48 static Structure* createStructure(JSGlobalData& globalData, JSValue prototype) 49 { 50 return Structure::create(globalData, prototype, TypeInfo(CompoundType, OverridesMarkChildren), AnonymousSlotCount, &s_info); 51 } 52 isPropertyNameIterator()53 virtual bool isPropertyNameIterator() const { return true; } 54 55 virtual void markChildren(MarkStack&); 56 getOffset(size_t i,int & offset)57 bool getOffset(size_t i, int& offset) 58 { 59 if (i >= m_numCacheableSlots) 60 return false; 61 offset = i; 62 return true; 63 } 64 65 JSValue get(ExecState*, JSObject*, size_t i); size()66 size_t size() { return m_jsStringsSize; } 67 setCachedStructure(JSGlobalData & globalData,Structure * structure)68 void setCachedStructure(JSGlobalData& globalData, Structure* structure) 69 { 70 ASSERT(!m_cachedStructure); 71 ASSERT(structure); 72 m_cachedStructure.set(globalData, this, structure); 73 } cachedStructure()74 Structure* cachedStructure() { return m_cachedStructure.get(); } 75 setCachedPrototypeChain(JSGlobalData & globalData,StructureChain * cachedPrototypeChain)76 void setCachedPrototypeChain(JSGlobalData& globalData, StructureChain* cachedPrototypeChain) { m_cachedPrototypeChain.set(globalData, this, cachedPrototypeChain); } cachedPrototypeChain()77 StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); } 78 79 private: 80 static const ClassInfo s_info; 81 JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot); 82 83 WriteBarrier<Structure> m_cachedStructure; 84 WriteBarrier<StructureChain> m_cachedPrototypeChain; 85 uint32_t m_numCacheableSlots; 86 uint32_t m_jsStringsSize; 87 OwnArrayPtr<WriteBarrier<Unknown> > m_jsStrings; 88 }; 89 setEnumerationCache(JSGlobalData & globalData,JSPropertyNameIterator * enumerationCache)90 inline void Structure::setEnumerationCache(JSGlobalData& globalData, JSPropertyNameIterator* enumerationCache) 91 { 92 ASSERT(!isDictionary()); 93 m_enumerationCache.set(globalData, this, enumerationCache); 94 } 95 enumerationCache()96 inline JSPropertyNameIterator* Structure::enumerationCache() 97 { 98 return m_enumerationCache.get(); 99 } 100 propertyNameIterator()101 ALWAYS_INLINE JSPropertyNameIterator* Register::propertyNameIterator() const 102 { 103 return static_cast<JSPropertyNameIterator*>(jsValue().asCell()); 104 } 105 106 } // namespace JSC 107 108 #endif // JSPropertyNameIterator_h 109