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FXJulianDate.h

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00001 /********************************************************************************
00002 *                                                                               *
00003 *                   Julian Date object                                          *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 2003 by Mathew Robertson.   All Rights Reserved.                *
00007 *********************************************************************************
00008 * This library is free software; you can redistribute it and/or                 *
00009 * modify it under the terms of the GNU Lesser General Public                    *
00010 * License as published by the Free Software Foundation; either                  *
00011 * version 2.1 of the License, or (at your option) any later version.            *
00012 *                                                                               *
00013 * This library is distributed in the hope that it will be useful,               *
00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of                *
00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU             *
00016 * Lesser General Public License for more details.                               *
00017 *                                                                               *
00018 * You should have received a copy of the GNU Lesser General Public              *
00019 * License along with this library; if not, write to the Free Software           *
00020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.    *
00021 ********************************************************************************/
00022 // Origonal design/implementation taken from jDate by: J. Knight <jimbag@kw.igs.net>
00023 #ifndef FXJULIANDATE_H
00024 #define FXJULIANDATE_H
00025 
00026 namespace FXEX {
00027 
00028 /**
00029  * Julian date to Gregorian data object
00030  */
00031 class FXAPI FXJulianDate {
00032 private:
00033   FXuint julian;                      // the date in Julian date format
00034   static const FXchar *monthNames[];  // names of months
00035   static const FXchar *dayNames[];    // names of days of the week
00036   
00037 protected:
00038   FXuint greg2jul( FXint y, FXint m, FXint d );
00039   void jul2greg( FXuint jd, FXint &y, FXint &m, FXint &d );
00040 
00041 public:
00042   /// use today's date
00043   FXJulianDate();
00044 
00045   /// use specific date
00046   FXJulianDate( FXint yr, FXint mo, FXint da );
00047   
00048   /// set the adte to a specific date
00049   void setDate( FXint y, FXint m, FXint d );
00050 
00051   /// set it to today's date
00052   void today();
00053 
00054   /// accessors
00055   FXint day();
00056   FXint month();
00057   FXint year();
00058   FXint daysInMonth();
00059   FXint dayOfWeek();
00060   FXint dayOfYear();
00061 
00062   /// is the value a leap year
00063   FXbool leapYear( FXint y );
00064 
00065   /// get the name of the month
00066   const FXchar *monthName( FXint month ) const;
00067 
00068   /// get the name of the day
00069   const FXchar *dayName( FXint day ) const;
00070 
00071   /// save to stream
00072   friend FXAPI FXStream& operator<< (FXStream& store,const FXJulianDate& d);
00073 
00074   /// load from stream
00075   friend FXAPI FXStream& operator>> (FXStream& store,FXJulianDate& d);
00076   
00077   /// dtor
00078   virtual ~FXJulianDate() {}
00079   };
00080 
00081 } // namespace FXEX
00082 #endif // FXJULIANDATE_H