/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: calendar_hijri.hxx,v $
 *
 *  $Revision: 1.6 $
 *
 *  last change: $Author: rt $ $Date: 2005-09-07 16:49:13 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    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
 *
 ************************************************************************/
#ifndef _I18N_CALENDAR_HIJRI_HXX_
#define _I18N_CALENDAR_HIJRI_HXX_

#include "calendar_gregorian.hxx"


//  ----------------------------------------------------
//  class Calendar_hijri
//  ----------------------------------------------------

namespace com { namespace sun { namespace star { namespace i18n {

class Calendar_hijri : public Calendar_gregorian
{
public:

    // Constructors
    Calendar_hijri();

protected:
    void SAL_CALL mapToGregorian() throw(com::sun::star::uno::RuntimeException);
    void SAL_CALL mapFromGregorian() throw(com::sun::star::uno::RuntimeException);

    // radians per degree (pi/180)
    static const double RadPerDeg;

    // Synodic Period (mean time between 2 successive new moon: 29d, 12 hr, 44min, 3sec
    static const double SynPeriod;

    static const double SynMonth;           // Solar days in a year/SynPeriod

    // Julian day on Jan 1, 1900
    static const double jd1900;

    // Reference point: September 1984 25d 3h 10m UT. == 1405 Hijri == 1048 Synodial month from 1900
    static const sal_Int32 SynRef;
    static const sal_Int32 GregRef;

    // Local time (Saudi Arabia)
    static const double SA_TimeZone;        // Time Zone

    // Period between 1.30pm - 6:30pm
    static const double EveningPeriod;

    // "Leap" years
    static const sal_Int32 LeapYear[];

private:
    double NewMoon(sal_Int32 n);
    void getHijri(sal_Int32 *day, sal_Int32 *month, sal_Int32 *year);
    void ToGregorian(sal_Int32 *day, sal_Int32 *month, sal_Int32 *year);
    void getGregorianDay(sal_Int32 jd, sal_Int32 *pnDay, sal_Int32 *pnMonth, sal_Int32 *pnYear);
    double getJulianDay(sal_Int32 day, sal_Int32 month, sal_Int32 year);
};

} } } }

#endif