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author | rubidium <rubidium@openttd.org> | 2006-08-14 14:21:15 +0000 |
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committer | rubidium <rubidium@openttd.org> | 2006-08-14 14:21:15 +0000 |
commit | 243872b4fd82a1ee024e98eaae3e17f6b36a6707 (patch) | |
tree | ce66f3f78e1bc27ddba6fa055772ec9eb5492f84 /date.h | |
parent | 01cd75cc10a9a9d2cd1687b9914a5e7dfc4888c3 (diff) | |
download | openttd-243872b4fd82a1ee024e98eaae3e17f6b36a6707.tar.xz |
(svn r5887) -Cleanup: move date related functions, defines and variables to date.[ch]
-Cleanup: fix whitespace related coding style issues in date.[ch]
-Cleanup: make original comments doxygen compatible and remove/change outdated comments
Diffstat (limited to 'date.h')
-rw-r--r-- | date.h | 35 |
1 files changed, 35 insertions, 0 deletions
@@ -0,0 +1,35 @@ +/* $Id$ */ + +/** + * 1 day is 74 ticks; _date_fract used to be uint16 and incremented by 885. On + * an overflow the new day begun and 65535 / 885 = 74. + * 1 tick is approximately 30 ms. + * 1 day is thus about 2 seconds (74 * 30 = 2220) on a machine that can run OpenTTD normally + */ +#define DAY_TICKS 74 + +#define MAX_YEAR_BEGIN_REAL 1920 +#define MAX_YEAR_END_REAL 2090 +#define MAX_YEAR_END 170 + +/* Year and Date are defined elsewhere */ +typedef uint8 Month; +typedef uint8 Day; +typedef uint16 DateFract; + +typedef struct YearMonthDay { + Year year; + Month month; + Day day; +} YearMonthDay; + +extern Year _cur_year; +extern Month _cur_month; +extern Date _date; +extern DateFract _date_fract; + + +void SetDate(Date date); +void ConvertDayToYMD(YearMonthDay *ymd, Date date); +uint ConvertYMDToDay(Year year, Month month, Day day); +Date ConvertIntDate(uint date); |