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/*
* Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JSPropertyNameIterator_h
#define JSPropertyNameIterator_h
#include "JSObject.h"
#include "JSString.h"
#include "Operations.h"
#include "PropertyNameArray.h"
namespace JSC {
class Identifier;
class JSObject;
class JSPropertyNameIterator : public JSCell {
friend class JIT;
public:
static JSPropertyNameIterator* create(ExecState*, JSObject*);
static PassRefPtr<Structure> createStructure(JSValue prototype)
{
return Structure::create(prototype, TypeInfo(CompoundType, OverridesMarkChildren), AnonymousSlotCount);
}
virtual ~JSPropertyNameIterator();
virtual bool isPropertyNameIterator() const { return true; }
virtual void markChildren(MarkStack&);
bool getOffset(size_t i, int& offset)
{
if (i >= m_numCacheableSlots)
return false;
offset = i;
return true;
}
JSValue get(ExecState*, JSObject*, size_t i);
size_t size() { return m_jsStringsSize; }
void setCachedStructure(Structure* structure)
{
ASSERT(!m_cachedStructure);
ASSERT(structure);
m_cachedStructure = structure;
}
Structure* cachedStructure() { return m_cachedStructure.get(); }
void setCachedPrototypeChain(NonNullPassRefPtr<StructureChain> cachedPrototypeChain) { m_cachedPrototypeChain = cachedPrototypeChain; }
StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
private:
JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot);
RefPtr<Structure> m_cachedStructure;
RefPtr<StructureChain> m_cachedPrototypeChain;
uint32_t m_numCacheableSlots;
uint32_t m_jsStringsSize;
OwnArrayPtr<JSValue> m_jsStrings;
};
inline void Structure::setEnumerationCache(JSPropertyNameIterator* enumerationCache)
{
ASSERT(!isDictionary());
m_enumerationCache = enumerationCache;
}
inline void Structure::clearEnumerationCache(JSPropertyNameIterator* enumerationCache)
{
m_enumerationCache.clear(enumerationCache);
}
inline JSPropertyNameIterator* Structure::enumerationCache()
{
return m_enumerationCache.get();
}
} // namespace JSC
#endif // JSPropertyNameIterator_h