runtime/DateInstance.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 DateInstance_h
  22 #define DateInstance_h
  23
  24 #include "JSWrapperObject.h"
  25
  26 namespace JSC {
  27
  28     class DateInstance : public JSWrapperObject {
  29     protected:
  30         JS_EXPORT_PRIVATE DateInstance(ExecState*, Structure*);
  31         void finishCreation(VM&);
  32         JS_EXPORT_PRIVATE void finishCreation(VM&, double);
  33
  34         static void destroy(JSCell*);
  35
  36     public:
  37         typedef JSWrapperObject Base;
  38
  39         static DateInstance* create(ExecState* exec, Structure* structure, double date)
  40         {
  41             DateInstance* instance = new (NotNull, allocateCell<DateInstance>(*exec->heap())) DateInstance(exec, structure);
  42             instance->finishCreation(exec->vm(), date);
  43             return instance;
  44         }
  45
  46         static DateInstance* create(ExecState* exec, Structure* structure)
  47         {
  48             DateInstance* instance = new (NotNull, allocateCell<DateInstance>(*exec->heap())) DateInstance(exec, structure);
  49             instance->finishCreation(exec->vm());
  50             return instance;
  51         }
  52
  53         double internalNumber() const { return internalValue().asNumber(); }
  54
  55         static JS_EXPORTDATA const ClassInfo s_info;
  56
  57         const GregorianDateTime* gregorianDateTime(ExecState* exec) const
  58         {
  59             if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
  60                 return &m_data->m_cachedGregorianDateTime;
  61             return calculateGregorianDateTime(exec);
  62         }
  63
  64         const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
  65         {
  66             if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
  67                 return &m_data->m_cachedGregorianDateTimeUTC;
  68             return calculateGregorianDateTimeUTC(exec);
  69         }
  70
  71         static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  72         {
  73             return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), &s_info);
  74         }
  75
  76     private:
  77         const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
  78         const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
  79
  80         mutable RefPtr<DateInstanceData> m_data;
  81     };
  82
  83     DateInstance* asDateInstance(JSValue);
  84
  85     inline DateInstance* asDateInstance(JSValue value)
  86     {
  87         ASSERT(asObject(value)->inherits(&DateInstance::s_info));
  88         return static_cast<DateInstance*>(asObject(value));
  89     }
  90
  91 } // namespace JSC
  92
  93 #endif // DateInstance_h