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 */