00001 /* $Id: date_func.h 17248 2009-08-21 20:21:05Z rubidium $ */ 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 00022 void SetDate(Date date); 00023 void ConvertDateToYMD(Date date, YearMonthDay *ymd); 00024 Date ConvertYMDToDate(Year year, Month month, Day day); 00025 00026 static inline bool IsLeapYear(Year yr) 00027 { 00028 return yr % 4 == 0 && (yr % 100 != 0 || yr % 400 == 0); 00029 } 00030 00031 #endif /* DATE_FUNC_H */