text: /*
   *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   *  Copyright (C) 2008 Apple Inc. All rights reserved.
   *
   *  This library is free software; you can redistribute it and/or
   *  modify it under the terms of the GNU Lesser General Public
   *  License as published by the Free Software Foundation; either
   *  version 2 of the License, or (at your option) any later version.
   *
   *  This library is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  Lesser General Public License for more details.
   *
   *  You should have received a copy of the GNU Lesser General Public
   *  License along with this library; if not, write to the Free Software
   *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   *
   */
  
  #ifndef DateInstance_h
  #define DateInstance_h
  
  #include "JSWrapperObject.h"
  
  namespace WTF {
      struct GregorianDateTime;
  }
  
  namespace JSC {
  
      class DateInstance : public JSWrapperObject {
      public:
          DateInstance(ExecState*, double);
          explicit DateInstance(ExecState*, NonNullPassRefPtr<Structure>);
  
          double internalNumber() const { return internalValue().uncheckedGetNumber(); }
  
          static JS_EXPORTDATA const ClassInfo info;
  
          const GregorianDateTime* gregorianDateTime(ExecState* exec) const
          {
              if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
                  return &m_data->m_cachedGregorianDateTime;
              return calculateGregorianDateTime(exec);
          }
          
          const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
          {
              if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
                  return &m_data->m_cachedGregorianDateTimeUTC;
              return calculateGregorianDateTimeUTC(exec);
          }
  
          static PassRefPtr<Structure> createStructure(JSValue prototype)
          {
              return Structure::create(prototype, TypeInfo(ObjectType, StructureFlags));
          }
  
      protected:
          static const unsigned StructureFlags = OverridesMarkChildren | JSWrapperObject::StructureFlags;
  
      private:
          const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
          const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
          virtual const ClassInfo* classInfo() const { return &info; }
  
          mutable RefPtr<DateInstanceData> m_data;
      };
  
      DateInstance* asDateInstance(JSValue);
  
      inline DateInstance* asDateInstance(JSValue value)
      {
          ASSERT(asObject(value)->inherits(&DateInstance::info));
          return static_cast<DateInstance*>(asObject(value));
      }
  
  } // namespace JSC
  
  #endif // DateInstance_h
  