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 EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState*);
  31 EncodedJSValue JSC_HOST_CALL objectConstructorGetOwnPropertySymbols(ExecState*);
  32 EncodedJSValue JSC_HOST_CALL objectConstructorKeys(ExecState*);
  33
  34 class ObjectPrototype;
  35
  36 class ObjectConstructor : public InternalFunction {
  37 public:
  38     typedef InternalFunction Base;
  39     static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot;
  40
  41     static ObjectConstructor* create(VM& vm, JSGlobalObject* globalObject, Structure* structure, ObjectPrototype* objectPrototype)
  42     {
  43         ObjectConstructor* constructor = new (NotNull, allocateCell<ObjectConstructor>(vm.heap)) ObjectConstructor(vm, structure);
  44         constructor->finishCreation(vm, globalObject, objectPrototype);
  45         return constructor;
  46     }
  47
  48     static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
  49
  50     DECLARE_INFO;
  51
  52     static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  53     {
  54         return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
  55     }
  56
  57     JSFunction* addDefineProperty(ExecState*, JSGlobalObject*);
  58
  59 protected:
  60     void finishCreation(VM&, JSGlobalObject*, ObjectPrototype*);
  61
  62 private:
  63     ObjectConstructor(VM&, Structure*);
  64     static ConstructType getConstructData(JSCell*, ConstructData&);
  65     static CallType getCallData(JSCell*, CallData&);
  66 };
  67
  68 inline JSObject* constructEmptyObject(ExecState* exec, Structure* structure)
  69 {
  70     return JSFinalObject::create(exec, structure);
  71 }
  72
  73 inline JSObject* constructEmptyObject(ExecState* exec, JSObject* prototype, unsigned inlineCapacity)
  74 {
  75     JSGlobalObject* globalObject = exec->lexicalGlobalObject();
  76     PrototypeMap& prototypeMap = globalObject->vm().prototypeMap;
  77     Structure* structure = prototypeMap.emptyObjectStructureForPrototype(
  78         prototype, inlineCapacity);
  79     return constructEmptyObject(exec, structure);
  80 }
  81
  82 inline JSObject* constructEmptyObject(ExecState* exec, JSObject* prototype)
  83 {
  84     return constructEmptyObject(exec, prototype, JSFinalObject::defaultInlineCapacity());
  85 }
  86
  87 inline JSObject* constructEmptyObject(ExecState* exec)
  88 {
  89     return constructEmptyObject(exec, exec->lexicalGlobalObject()->objectPrototype());
  90 }
  91
  92 JSObject* objectConstructorFreeze(ExecState*, JSObject*);
  93
  94 } // namespace JSC
  95
  96 #endif // ObjectConstructor_h