runtime/InternalFunction.h

   1 /*
   2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2003, 2006, 2007, 2008 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 InternalFunction_h
  25 #define InternalFunction_h
  26
  27 #include "JSObjectWithGlobalObject.h"
  28 #include "Identifier.h"
  29
  30 namespace JSC {
  31
  32     class FunctionPrototype;
  33
  34     class InternalFunction : public JSObjectWithGlobalObject {
  35     public:
  36         static JS_EXPORTDATA const ClassInfo s_info;
  37
  38         const UString& name(ExecState*);
  39         const UString displayName(ExecState*);
  40         const UString calculatedDisplayName(ExecState*);
  41
  42         static Structure* createStructure(JSGlobalData& globalData, JSValue proto)
  43         {
  44             return Structure::create(globalData, proto, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
  45         }
  46
  47     protected:
  48         static const unsigned StructureFlags = ImplementsHasInstance | JSObject::StructureFlags;
  49
  50         // Only used to allow us to determine the JSFunction vptr
  51         InternalFunction(VPtrStealingHackType);
  52
  53         InternalFunction(JSGlobalData*, JSGlobalObject*, Structure*, const Identifier&);
  54
  55     private:
  56         virtual CallType getCallData(CallData&) = 0;
  57
  58         virtual void vtableAnchor();
  59     };
  60
  61     InternalFunction* asInternalFunction(JSValue);
  62
  63     inline InternalFunction* asInternalFunction(JSValue value)
  64     {
  65         ASSERT(asObject(value)->inherits(&InternalFunction::s_info));
  66         return static_cast<InternalFunction*>(asObject(value));
  67     }
  68
  69 } // namespace JSC
  70
  71 #endif // InternalFunction_h