runtime/StringObject.h

   1 /*
   2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2007, 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 StringObject_h
  22 #define StringObject_h
  23
  24 #include "JSWrapperObject.h"
  25 #include "JSString.h"
  26
  27 namespace JSC {
  28
  29     class StringObject : public JSWrapperObject {
  30     public:
  31         typedef JSWrapperObject Base;
  32
  33         static StringObject* create(ExecState* exec, Structure* structure)
  34         {
  35             JSString* string = jsEmptyString(exec);
  36             StringObject* object = new (NotNull, allocateCell<StringObject>(*exec->heap())) StringObject(exec->vm(), structure);
  37             object->finishCreation(exec->vm(), string);
  38             return object;
  39         }
  40         static StringObject* create(ExecState* exec, Structure* structure, JSString* string)
  41         {
  42             StringObject* object = new (NotNull, allocateCell<StringObject>(*exec->heap())) StringObject(exec->vm(), structure);
  43             object->finishCreation(exec->vm(), string);
  44             return object;
  45         }
  46         static StringObject* create(ExecState*, JSGlobalObject*, JSString*);
  47
  48         static bool getOwnPropertySlot(JSCell*, ExecState*, PropertyName, PropertySlot&);
  49         static bool getOwnPropertySlotByIndex(JSCell*, ExecState*, unsigned propertyName, PropertySlot&);
  50         static bool getOwnPropertyDescriptor(JSObject*, ExecState*, PropertyName, PropertyDescriptor&);
  51
  52         static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
  53         static void putByIndex(JSCell*, ExecState*, unsigned propertyName, JSValue, bool shouldThrow);
  54
  55         static bool deleteProperty(JSCell*, ExecState*, PropertyName);
  56         static bool deletePropertyByIndex(JSCell*, ExecState*, unsigned propertyName);
  57         static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
  58         static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, PropertyDescriptor&, bool shouldThrow);
  59
  60         static const JS_EXPORTDATA ClassInfo s_info;
  61
  62         JSString* internalValue() const { return asString(JSWrapperObject::internalValue());}
  63
  64         static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  65         {
  66             return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), &s_info);
  67         }
  68
  69     protected:
  70         JS_EXPORT_PRIVATE void finishCreation(VM&, JSString*);
  71         static const unsigned StructureFlags = OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | OverridesGetPropertyNames | JSWrapperObject::StructureFlags;
  72         JS_EXPORT_PRIVATE StringObject(VM&, Structure*);
  73     };
  74
  75     StringObject* asStringObject(JSValue);
  76
  77     inline StringObject* asStringObject(JSValue value)
  78     {
  79         ASSERT(asObject(value)->inherits(&StringObject::s_info));
  80         return static_cast<StringObject*>(asObject(value));
  81     }
  82
  83     JS_EXPORT_PRIVATE StringObject* constructString(ExecState*, JSGlobalObject*, JSValue);
  84
  85 } // namespace JSC
  86
  87 #endif // StringObject_h