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 WTF {
  27     struct GregorianDateTime;
  28 }
  29
  30 namespace JSC {
  31
  32     class DateInstance : public JSWrapperObject {
  33     public:
  34         DateInstance(ExecState*, Structure*, double);
  35         explicit DateInstance(ExecState*, Structure*);
  36
  37         double internalNumber() const { return internalValue().uncheckedGetNumber(); }
  38
  39         static JS_EXPORTDATA const ClassInfo s_info;
  40
  41         const GregorianDateTime* gregorianDateTime(ExecState* exec) const
  42         {
  43             if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
  44                 return &m_data->m_cachedGregorianDateTime;
  45             return calculateGregorianDateTime(exec);
  46         }
  47
  48         const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
  49         {
  50             if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
  51                 return &m_data->m_cachedGregorianDateTimeUTC;
  52             return calculateGregorianDateTimeUTC(exec);
  53         }
  54
  55         static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
  56         {
  57             return Structure::create(globalData, prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
  58         }
  59
  60     private:
  61         const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
  62         const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
  63
  64         mutable RefPtr<DateInstanceData> m_data;
  65     };
  66
  67     DateInstance* asDateInstance(JSValue);
  68
  69     inline DateInstance* asDateInstance(JSValue value)
  70     {
  71         ASSERT(asObject(value)->inherits(&DateInstance::s_info));
  72         return static_cast<DateInstance*>(asObject(value));
  73     }
  74
  75 } // namespace JSC
  76
  77 #endif // DateInstance_h