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(VM& vm, Structure* structure, ObjectPrototype* objectPrototype)
  37         {
  38             ObjectConstructor* constructor = new (NotNull, allocateCell<ObjectConstructor>(vm.heap)) ObjectConstructor(vm, structure);
  39             constructor->finishCreation(vm, objectPrototype);
  40             return constructor;
  41         }
  42
  43         static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
  44
  45         DECLARE_INFO;
  46
  47         static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  48         {
  49             return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
  50         }
  51
  52     protected:
  53         void finishCreation(VM& vm, ObjectPrototype*);
  54         static const unsigned StructureFlags = OverridesGetOwnPropertySlot | InternalFunction::StructureFlags;
  55
  56     private:
  57         ObjectConstructor(VM&, Structure*);
  58         static ConstructType getConstructData(JSCell*, ConstructData&);
  59         static CallType getCallData(JSCell*, CallData&);
  60     };
  61
  62     inline JSObject* constructEmptyObject(ExecState* exec, Structure* structure)
  63     {
  64         return JSFinalObject::create(exec, structure);
  65     }
  66
  67     inline JSObject* constructEmptyObject(ExecState* exec, JSObject* prototype, unsigned inlineCapacity)
  68     {
  69         JSGlobalObject* globalObject = exec->lexicalGlobalObject();
  70         PrototypeMap& prototypeMap = globalObject->vm().prototypeMap;
  71         Structure* structure = prototypeMap.emptyObjectStructureForPrototype(
  72             prototype, inlineCapacity);
  73         return constructEmptyObject(exec, structure);
  74     }
  75
  76     inline JSObject* constructEmptyObject(ExecState* exec, JSObject* prototype)
  77     {
  78         return constructEmptyObject(exec, prototype, JSFinalObject::defaultInlineCapacity());
  79     }
  80
  81     inline JSObject* constructEmptyObject(ExecState* exec)
  82     {
  83         return constructEmptyObject(exec, exec->lexicalGlobalObject()->objectPrototype());
  84     }
  85
  86 } // namespace JSC
  87
  88 #endif // ObjectConstructor_h