JSFunction.h revision 635860845790a19bf50bbc51ba8fb66a96dde068 
1/*
2 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 *  Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
4 *  Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
5 *  Copyright (C) 2007 Maks Orlovich
6 *
7 *  This library is free software; you can redistribute it and/or
8 *  modify it under the terms of the GNU Library General Public
9 *  License as published by the Free Software Foundation; either
10 *  version 2 of the License, or (at your option) any later version.
11 *
12 *  This library is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 *  Library General Public License for more details.
16 *
17 *  You should have received a copy of the GNU Library General Public License
18 *  along with this library; see the file COPYING.LIB.  If not, write to
19 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 *  Boston, MA 02110-1301, USA.
21 *
22 */
23
24#ifndef JSFunction_h
25#define JSFunction_h
26
27#include "InternalFunction.h"
28#include "JSVariableObject.h"
29#include "SymbolTable.h"
30#include "Nodes.h"
31#include "JSObject.h"
32
33namespace JSC {
34
35    class FunctionBodyNode;
36    class FunctionPrototype;
37    class JSActivation;
38    class JSGlobalObject;
39
40    class JSFunction : public InternalFunction {
41        friend class JIT;
42        friend class Interpreter;
43
44        typedef InternalFunction Base;
45
46        JSFunction(PassRefPtr<Structure> structure)
47            : InternalFunction(structure)
48            , m_scopeChain(NoScopeChain())
49        {
50        }
51
52    public:
53        JSFunction(ExecState*, const Identifier&, FunctionBodyNode*, ScopeChainNode*);
54        ~JSFunction();
55
56        virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&);
57        virtual void put(ExecState*, const Identifier& propertyName, JSValuePtr, PutPropertySlot&);
58        virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
59
60        JSObject* construct(ExecState*, const ArgList&);
61        JSValuePtr call(ExecState*, JSValuePtr thisValue, const ArgList&);
62
63        void setScope(const ScopeChain& scopeChain) { m_scopeChain = scopeChain; }
64        ScopeChain& scope() { return m_scopeChain; }
65
66        void setBody(FunctionBodyNode* body) { m_body = body; }
67        void setBody(PassRefPtr<FunctionBodyNode> body) { m_body = body; }
68        FunctionBodyNode* body() const { return m_body.get(); }
69
70        virtual void mark();
71
72        static const ClassInfo info;
73
74        static PassRefPtr<Structure> createStructure(JSValuePtr prototype)
75        {
76            return Structure::create(prototype, TypeInfo(ObjectType, ImplementsHasInstance));
77        }
78
79    private:
80        virtual const ClassInfo* classInfo() const { return &info; }
81
82        virtual ConstructType getConstructData(ConstructData&);
83        virtual CallType getCallData(CallData&);
84
85        static JSValuePtr argumentsGetter(ExecState*, const Identifier&, const PropertySlot&);
86        static JSValuePtr callerGetter(ExecState*, const Identifier&, const PropertySlot&);
87        static JSValuePtr lengthGetter(ExecState*, const Identifier&, const PropertySlot&);
88
89        RefPtr<FunctionBodyNode> m_body;
90        ScopeChain m_scopeChain;
91    };
92
93    JSFunction* asFunction(JSValuePtr);
94
95    inline JSFunction* asFunction(JSValuePtr value)
96    {
97        ASSERT(asObject(value)->inherits(&JSFunction::info));
98        return static_cast<JSFunction*>(asObject(value));
99    }
100
101} // namespace JSC
102
103#endif // JSFunction_h
104