# 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
    00027 static inline bool IsLeapYear(Year yr)
    00028 {
    00029   return yr % 4 == 0 && (yr % 100 != 0 || yr % 400 == 0);
    00030 }
    00031
    00032 #endif /* DATE_FUNC_H */