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     protected:
  34         JS_EXPORT_PRIVATE DateInstance(ExecState*, Structure*);
  35         void finishCreation(JSGlobalData&);
  36         JS_EXPORT_PRIVATE void finishCreation(JSGlobalData&, double);
  37
  38         static void destroy(JSCell*);
  39
  40     public:
  41         typedef JSWrapperObject Base;
  42
  43         static DateInstance* create(ExecState* exec, Structure* structure, double date)
  44         {
  45             DateInstance* instance = new (NotNull, allocateCell<DateInstance>(*exec->heap())) DateInstance(exec, structure);
  46             instance->finishCreation(exec->globalData(), date);
  47             return instance;
  48         }
  49
  50         static DateInstance* create(ExecState* exec, Structure* structure)
  51         {
  52             DateInstance* instance = new (NotNull, allocateCell<DateInstance>(*exec->heap())) DateInstance(exec, structure);
  53             instance->finishCreation(exec->globalData());
  54             return instance;
  55         }
  56
  57         double internalNumber() const { return internalValue().asNumber(); }
  58
  59         static JS_EXPORTDATA const ClassInfo s_info;
  60
  61         const GregorianDateTime* gregorianDateTime(ExecState* exec) const
  62         {
  63             if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
  64                 return &m_data->m_cachedGregorianDateTime;
  65             return calculateGregorianDateTime(exec);
  66         }
  67
  68         const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
  69         {
  70             if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
  71                 return &m_data->m_cachedGregorianDateTimeUTC;
  72             return calculateGregorianDateTimeUTC(exec);
  73         }
  74
  75         static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
  76         {
  77             return Structure::create(globalData, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), &s_info);
  78         }
  79
  80     private:
  81         const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
  82         const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
  83
  84         mutable RefPtr<DateInstanceData> m_data;
  85     };
  86
  87     DateInstance* asDateInstance(JSValue);
  88
  89     inline DateInstance* asDateInstance(JSValue value)
  90     {
  91         ASSERT(asObject(value)->inherits(&DateInstance::s_info));
  92         return static_cast<DateInstance*>(asObject(value));
  93     }
  94
  95 } // namespace JSC
  96
  97 #endif // DateInstance_h