runtime/JSFunction.h

   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
  33 namespace 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