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/*
* Copyright (C) 2006, 2008, 2012 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef PropertyNameArray_h
#define PropertyNameArray_h
#include "CallFrame.h"
#include "Identifier.h"
#include <wtf/HashSet.h>
#include <wtf/Vector.h>
namespace JSC {
class JSPropertyNameEnumerator;
class Structure;
class StructureChain;
class RefCountedIdentifierSet : public RefCounted<RefCountedIdentifierSet> {
public:
typedef HashSet<StringImpl*, PtrHash<StringImpl*>> Set;
bool contains(StringImpl* impl) const { return m_set.contains(impl); }
size_t size() const { return m_set.size(); }
Set::AddResult add(StringImpl* impl) { return m_set.add(impl); }
private:
Set m_set;
};
// FIXME: Rename to PropertyNameArray.
class PropertyNameArrayData : public RefCounted<PropertyNameArrayData> {
public:
typedef Vector<Identifier, 20> PropertyNameVector;
static PassRefPtr<PropertyNameArrayData> create() { return adoptRef(new PropertyNameArrayData); }
PropertyNameVector& propertyNameVector() { return m_propertyNameVector; }
private:
PropertyNameArrayData()
{
}
PropertyNameVector m_propertyNameVector;
};
// FIXME: Rename to PropertyNameArrayBuilder.
class PropertyNameArray {
public:
PropertyNameArray(VM* vm)
: m_data(PropertyNameArrayData::create())
, m_set(adoptRef(new RefCountedIdentifierSet))
, m_vm(vm)
, m_numCacheableSlots(0)
, m_baseObject(0)
, m_previouslyEnumeratedLength(0)
{
}
PropertyNameArray(ExecState* exec)
: m_data(PropertyNameArrayData::create())
, m_set(adoptRef(new RefCountedIdentifierSet))
, m_vm(&exec->vm())
, m_numCacheableSlots(0)
, m_baseObject(0)
, m_previouslyEnumeratedLength(0)
{
}
VM* vm() { return m_vm; }
void add(uint32_t index)
{
if (index < m_previouslyEnumeratedLength)
return;
add(Identifier::from(m_vm, index));
}
void add(const Identifier& identifier) { add(identifier.impl()); }
JS_EXPORT_PRIVATE void add(StringImpl*);
void addKnownUnique(StringImpl* identifier)
{
m_set->add(identifier);
m_data->propertyNameVector().append(Identifier(m_vm, identifier));
}
Identifier& operator[](unsigned i) { return m_data->propertyNameVector()[i]; }
const Identifier& operator[](unsigned i) const { return m_data->propertyNameVector()[i]; }
void setData(PassRefPtr<PropertyNameArrayData> data) { m_data = data; }
PropertyNameArrayData* data() { return m_data.get(); }
PassRefPtr<PropertyNameArrayData> releaseData() { return m_data.release(); }
RefCountedIdentifierSet* identifierSet() const { return m_set.get(); }
// FIXME: Remove these functions.
bool canAddKnownUniqueForStructure() const { return !m_set->size() && (!m_alternateSet || !m_alternateSet->size()); }
typedef PropertyNameArrayData::PropertyNameVector::const_iterator const_iterator;
size_t size() const { return m_data->propertyNameVector().size(); }
const_iterator begin() const { return m_data->propertyNameVector().begin(); }
const_iterator end() const { return m_data->propertyNameVector().end(); }
size_t numCacheableSlots() const { return m_numCacheableSlots; }
void setNumCacheableSlotsForObject(JSObject* object, size_t numCacheableSlots)
{
if (object != m_baseObject)
return;
m_numCacheableSlots = numCacheableSlots;
}
void setBaseObject(JSObject* object)
{
if (m_baseObject)
return;
m_baseObject = object;
}
void setPreviouslyEnumeratedLength(uint32_t length) { m_previouslyEnumeratedLength = length; }
void setPreviouslyEnumeratedProperties(const JSPropertyNameEnumerator*);
private:
RefPtr<PropertyNameArrayData> m_data;
RefPtr<RefCountedIdentifierSet> m_set;
RefPtr<RefCountedIdentifierSet> m_alternateSet;
VM* m_vm;
size_t m_numCacheableSlots;
JSObject* m_baseObject;
uint32_t m_previouslyEnumeratedLength;
};
} // namespace JSC
#endif // PropertyNameArray_h
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