/*

 *  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);

        DateInstance(ExecState*, NonNullPassRefPtr<Structure>, 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), AnonymousSlotCount);

        }

    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