date_func.h

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD 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.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifndef DATE_FUNC_H
00013 #define DATE_FUNC_H
00014 
00015 #include "date_type.h"
00016 
00017 extern Year      _cur_year;
00018 extern Month     _cur_month;
00019 extern Date      _date;
00020 extern DateFract _date_fract;
00021 extern uint16 _tick_counter;
00022 
00023 void SetDate(Date date, DateFract fract);
00024 void ConvertDateToYMD(Date date, YearMonthDay *ymd);
00025 Date ConvertYMDToDate(Year year, Month month, Day day);
00026 
00032 static inline bool IsLeapYear(Year yr)
00033 {
00034   return yr % 4 == 0 && (yr % 100 != 0 || yr % 400 == 0);
00035 }
00036 
00037 #endif /* DATE_FUNC_H */