/****************************************************************************
** libebml : parse EBML files, see http://embl.sourceforge.net/
**
** <file/class description>
**
** Copyright (C) 2002-2010 Steve Lhomme.  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 2.1 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**
** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
**
** Contact license@matroska.org if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

/*!
	\file
	\version \$Id$
	\author Steve Lhomme     <robux4 @ users.sf.net>
*/
#ifndef LIBEBML_DATE_H
#define LIBEBML_DATE_H

#include "EbmlTypes.h"
#include "EbmlElement.h"

START_LIBEBML_NAMESPACE

/*!
    \class EbmlDate
    \brief Handle all operations related to an EBML date
*/
class EBML_DLL_API EbmlDate : public EbmlElement {
	public:
		EbmlDate() :EbmlElement(8, false), myDate(0) {}
		EbmlDate(const EbmlDate & ElementToClone);

		/*!
			\brief set the date with a UNIX/C/EPOCH form
			\param NewDate UNIX/C date in UTC (no timezone)
		*/
		void SetEpochDate(int64 NewDate) {myDate = (NewDate - UnixEpochDelay) * 1000000000; SetValueIsSet();}
    EbmlDate &SetValue(int64 NewValue) {SetEpochDate(NewValue); return *this;}

		/*!
			\brief get the date with a UNIX/C/EPOCH form
			\note the date is in UTC (no timezone)
		*/
		int64 GetEpochDate() const {return int64(myDate/1000000000 + UnixEpochDelay);}
    int64 GetValue() const {return GetEpochDate();}

		virtual bool ValidateSize() const {return IsFiniteSize() && ((GetSize() == 8) || (GetSize() == 0));}

		/*!
			\note no Default date handled
		*/
		filepos_t UpdateSize(bool /* bWithDefault = false */, bool /* bForceRender = false */) {
			if(!ValueIsSet())
				SetSize_(0);
			else
				SetSize_(8);
			return GetSize();
		}

		virtual bool IsSmallerThan(const EbmlElement *Cmp) const;

		filepos_t ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA);

		bool IsDefaultValue() const {
			return false;
		}

#if defined(EBML_STRICT_API)
    private:
#else
    protected:
#endif
		filepos_t RenderData(IOCallback & output, bool bForceRender, bool bWithDefault = false);

		int64 myDate; ///< internal format of the date

		static const uint64 UnixEpochDelay;
};

END_LIBEBML_NAMESPACE

#endif // LIBEBML_DATE_H
