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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
* Copyright (C) 2007 Maks Orlovich
*
* 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 JSFunction_h
#define JSFunction_h
#include "InternalFunction.h"
namespace JSC {
class ExecutableBase;
class FunctionExecutable;
class FunctionPrototype;
class JSActivation;
class JSGlobalObject;
class JSFunction : public InternalFunction {
friend class JIT;
friend struct VPtrSet;
typedef InternalFunction Base;
public:
JSFunction(ExecState*, NonNullPassRefPtr<Structure>, int length, const Identifier&, NativeFunction);
JSFunction(ExecState*, NonNullPassRefPtr<FunctionExecutable>, ScopeChainNode*);
virtual ~JSFunction();
JSObject* construct(ExecState*, const ArgList&);
JSValue call(ExecState*, JSValue thisValue, const ArgList&);
void setScope(const ScopeChain& scopeChain) { setScopeChain(scopeChain); }
ScopeChain& scope() { return scopeChain(); }
ExecutableBase* executable() const { return m_executable.get(); }
// To call either of these methods include Executable.h
inline bool isHostFunction() const;
FunctionExecutable* jsExecutable() const;
static JS_EXPORTDATA const ClassInfo info;
static PassRefPtr<Structure> createStructure(JSValue prototype)
{
return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
}
NativeFunction nativeFunction()
{
return *WTF::bitwise_cast<NativeFunction*>(m_data);
}
virtual ConstructType getConstructData(ConstructData&);
virtual CallType getCallData(CallData&);
protected:
const static unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | InternalFunction::StructureFlags;
private:
JSFunction(NonNullPassRefPtr<Structure>);
bool isHostFunctionNonInline() const;
virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&);
virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&);
virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
virtual void markChildren(MarkStack&);
virtual const ClassInfo* classInfo() const { return &info; }
static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&);
static JSValue callerGetter(ExecState*, const Identifier&, const PropertySlot&);
static JSValue lengthGetter(ExecState*, const Identifier&, const PropertySlot&);
RefPtr<ExecutableBase> m_executable;
ScopeChain& scopeChain()
{
ASSERT(!isHostFunctionNonInline());
return *WTF::bitwise_cast<ScopeChain*>(m_data);
}
void clearScopeChain()
{
ASSERT(!isHostFunctionNonInline());
new (m_data) ScopeChain(NoScopeChain());
}
void setScopeChain(ScopeChainNode* sc)
{
ASSERT(!isHostFunctionNonInline());
new (m_data) ScopeChain(sc);
}
void setScopeChain(const ScopeChain& sc)
{
ASSERT(!isHostFunctionNonInline());
*WTF::bitwise_cast<ScopeChain*>(m_data) = sc;
}
void setNativeFunction(NativeFunction func)
{
*WTF::bitwise_cast<NativeFunction*>(m_data) = func;
}
unsigned char m_data[sizeof(void*)];
};
JSFunction* asFunction(JSValue);
inline JSFunction* asFunction(JSValue value)
{
ASSERT(asObject(value)->inherits(&JSFunction::info));
return static_cast<JSFunction*>(asObject(value));
}
} // namespace JSC
#endif // JSFunction_h
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