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/*
* Copyright (C) 2012 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 JSSymbolTableObject_h
#define JSSymbolTableObject_h
#include "JSScope.h"
#include "PropertyDescriptor.h"
#include "SymbolTable.h"
namespace JSC {
class JSSymbolTableObject : public JSScope {
public:
typedef JSScope Base;
SharedSymbolTable* symbolTable() const { return m_symbolTable.get(); }
static NO_RETURN_DUE_TO_CRASH void putDirectVirtual(JSObject*, ExecState*, PropertyName, JSValue, unsigned attributes);
JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, ExecState*, PropertyName);
JS_EXPORT_PRIVATE static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
protected:
static const unsigned StructureFlags = IsEnvironmentRecord | OverridesVisitChildren | OverridesGetPropertyNames | Base::StructureFlags;
JSSymbolTableObject(VM& vm, Structure* structure, JSScope* scope, SharedSymbolTable* symbolTable = 0)
: Base(vm, structure, scope)
{
if (symbolTable)
m_symbolTable.set(vm, this, symbolTable);
}
void finishCreation(VM& vm)
{
Base::finishCreation(vm);
if (!m_symbolTable)
m_symbolTable.set(vm, this, SharedSymbolTable::create(vm));
}
static void visitChildren(JSCell*, SlotVisitor&);
WriteBarrier<SharedSymbolTable> m_symbolTable;
};
template<typename SymbolTableObjectType>
inline bool symbolTableGet(
SymbolTableObjectType* object, PropertyName propertyName, PropertySlot& slot)
{
SymbolTable& symbolTable = *object->symbolTable();
SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
if (iter == symbolTable.end())
return false;
SymbolTableEntry::Fast entry = iter->value;
ASSERT(!entry.isNull());
slot.setValue(object->registerAt(entry.getIndex()).get());
return true;
}
template<typename SymbolTableObjectType>
inline bool symbolTableGet(
SymbolTableObjectType* object, PropertyName propertyName, PropertyDescriptor& descriptor)
{
SymbolTable& symbolTable = *object->symbolTable();
SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
if (iter == symbolTable.end())
return false;
SymbolTableEntry::Fast entry = iter->value;
ASSERT(!entry.isNull());
descriptor.setDescriptor(
object->registerAt(entry.getIndex()).get(), entry.getAttributes() | DontDelete);
return true;
}
template<typename SymbolTableObjectType>
inline bool symbolTableGet(
SymbolTableObjectType* object, PropertyName propertyName, PropertySlot& slot,
bool& slotIsWriteable)
{
SymbolTable& symbolTable = *object->symbolTable();
SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
if (iter == symbolTable.end())
return false;
SymbolTableEntry::Fast entry = iter->value;
ASSERT(!entry.isNull());
slot.setValue(object->registerAt(entry.getIndex()).get());
slotIsWriteable = !entry.isReadOnly();
return true;
}
template<typename SymbolTableObjectType>
inline bool symbolTablePut(
SymbolTableObjectType* object, ExecState* exec, PropertyName propertyName, JSValue value,
bool shouldThrow)
{
VM& vm = exec->vm();
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(object));
SymbolTable& symbolTable = *object->symbolTable();
SymbolTable::iterator iter = symbolTable.find(propertyName.publicName());
if (iter == symbolTable.end())
return false;
bool wasFat;
SymbolTableEntry::Fast fastEntry = iter->value.getFast(wasFat);
ASSERT(!fastEntry.isNull());
if (fastEntry.isReadOnly()) {
if (shouldThrow)
throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return true;
}
if (UNLIKELY(wasFat))
iter->value.notifyWrite();
object->registerAt(fastEntry.getIndex()).set(vm, object, value);
return true;
}
template<typename SymbolTableObjectType>
inline bool symbolTablePutWithAttributes(
SymbolTableObjectType* object, VM& vm, PropertyName propertyName,
JSValue value, unsigned attributes)
{
ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(object));
SymbolTable::iterator iter = object->symbolTable()->find(propertyName.publicName());
if (iter == object->symbolTable()->end())
return false;
SymbolTableEntry& entry = iter->value;
ASSERT(!entry.isNull());
entry.notifyWrite();
entry.setAttributes(attributes);
object->registerAt(entry.getIndex()).set(vm, object, value);
return true;
}
} // namespace JSC
#endif // JSSymbolTableObject_h
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