runtime/ObjectConstructor.h

   1 /*
   2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2008 Apple Inc. All rights reserved.
   4  *
   5  *  This library is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU Lesser General Public
   7  *  License as published by the Free Software Foundation; either
   8  *  version 2 of the License, or (at your option) any later version.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public
  16  *  License along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  *
  19  */
  20
  21 #ifndef ObjectConstructor_h
  22 #define ObjectConstructor_h
  23
  24 #include "InternalFunction.h"
  25 #include "JSGlobalObject.h"
  26 #include "ObjectPrototype.h"
  27
  28 namespace JSC {
  29
  30     class ObjectPrototype;
  31
  32     class ObjectConstructor : public InternalFunction {
  33     public:
  34         typedef InternalFunction Base;
  35
  36         static ObjectConstructor* create(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, ObjectPrototype* objectPrototype)
  37         {
  38             ObjectConstructor* constructor = new (NotNull, allocateCell<ObjectConstructor>(*exec->heap())) ObjectConstructor(globalObject, structure);
  39             constructor->finishCreation(exec, objectPrototype);
  40             return constructor;
  41         }
  42
  43         static bool getOwnPropertySlot(JSCell*, ExecState*, PropertyName, PropertySlot&);
  44         static bool getOwnPropertyDescriptor(JSObject*, ExecState*, PropertyName, PropertyDescriptor&);
  45
  46         static const ClassInfo s_info;
  47
  48         static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  49         {
  50             return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), &s_info);
  51         }
  52
  53     protected:
  54         void finishCreation(ExecState*, ObjectPrototype*);
  55         static const unsigned StructureFlags = OverridesGetOwnPropertySlot | InternalFunction::StructureFlags;
  56
  57     private:
  58         ObjectConstructor(JSGlobalObject*, Structure*);
  59         static ConstructType getConstructData(JSCell*, ConstructData&);
  60         static CallType getCallData(JSCell*, CallData&);
  61     };
  62
  63     inline JSObject* constructEmptyObject(ExecState* exec, Structure* structure)
  64     {
  65         return JSFinalObject::create(exec, structure);
  66     }
  67
  68     inline JSObject* constructEmptyObject(ExecState* exec, JSObject* prototype, unsigned inlineCapacity)
  69     {
  70         JSGlobalObject* globalObject = exec->lexicalGlobalObject();
  71         PrototypeMap& prototypeMap = globalObject->vm().prototypeMap;
  72         Structure* structure = prototypeMap.emptyObjectStructureForPrototype(
  73             prototype, inlineCapacity);
  74         return constructEmptyObject(exec, structure);
  75     }
  76
  77     inline JSObject* constructEmptyObject(ExecState* exec, JSObject* prototype)
  78     {
  79         return constructEmptyObject(exec, prototype, JSFinalObject::defaultInlineCapacity());
  80     }
  81
  82     inline JSObject* constructEmptyObject(ExecState* exec)
  83     {
  84         return constructEmptyObject(exec, exec->lexicalGlobalObject()->objectPrototype());
  85     }
  86
  87 } // namespace JSC
  88
  89 #endif // ObjectConstructor_h