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 #include "core/random_func.hpp"
00017 
00018 extern Year      _cur_year;
00019 extern Month     _cur_month;
00020 extern Date      _date;
00021 extern DateFract _date_fract;
00022 extern uint16 _tick_counter;
00023 
00024 void SetDate(Date date, DateFract fract);
00025 void ConvertDateToYMD(Date date, YearMonthDay *ymd);
00026 Date ConvertYMDToDate(Year year, Month month, Day day);
00027 
00033 static inline bool IsLeapYear(Year yr)
00034 {
00035   return yr % 4 == 0 && (yr % 100 != 0 || yr % 400 == 0);
00036 }
00037 
00038 extern uint8 _head_to_head;
00039 #define BEGIN_HEAD_TO_HEAD() { Randomizer rand_backup = _random; _head_to_head = 1; do { _random = rand_backup;
00040 #define END_HEAD_TO_HEAD() _head_to_head++; } while(_head_to_head <= _settings_game.game_creation.head_to_head_areas); _head_to_head = 0; }
00041 
00042 
00043 #endif /* DATE_FUNC_H */