You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
/*
|
|
* This file is part of OpenTTD.
|
|
* 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.
|
|
* 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.
|
|
* 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/>.
|
|
*/
|
|
|
|
/** @file date_func.h Functions related to dates. */
|
|
|
|
#ifndef DATE_FUNC_H
|
|
#define DATE_FUNC_H
|
|
|
|
#include "date_type.h"
|
|
|
|
extern YearMonthDay _cur_date_ymd;
|
|
extern Date _date;
|
|
extern DateFract _date_fract;
|
|
extern uint64 _tick_counter;
|
|
extern uint8 _tick_skip_counter;
|
|
extern uint32 _scaled_tick_counter;
|
|
extern DateTicksScaled _scaled_date_ticks;
|
|
extern uint32 _quit_after_days;
|
|
|
|
extern YearMonthDay _game_load_cur_date_ymd;
|
|
extern DateFract _game_load_date_fract;
|
|
extern uint8 _game_load_tick_skip_counter;
|
|
|
|
void SetDate(Date date, DateFract fract);
|
|
void ConvertDateToYMD(Date date, YearMonthDay *ymd);
|
|
Date ConvertYMDToDate(Year year, Month month, Day day);
|
|
void SetScaledTickVariables();
|
|
|
|
inline Date ConvertYMDToDate(const YearMonthDay &ymd)
|
|
{
|
|
return ConvertYMDToDate(ymd.year, ymd.month, ymd.day);
|
|
}
|
|
|
|
#define _cur_year (static_cast<Year>(_cur_date_ymd.year))
|
|
|
|
/**
|
|
* Checks whether the given year is a leap year or not.
|
|
* @param yr The year to check.
|
|
* @return True if \c yr is a leap year, otherwise false.
|
|
*/
|
|
static inline bool IsLeapYear(Year yr)
|
|
{
|
|
return yr % 4 == 0 && (yr % 100 != 0 || yr % 400 == 0);
|
|
}
|
|
|
|
#endif /* DATE_FUNC_H */
|