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author | rubidium <rubidium@openttd.org> | 2006-08-20 12:39:17 +0000 |
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committer | rubidium <rubidium@openttd.org> | 2006-08-20 12:39:17 +0000 |
commit | e159ada7a2a0367c99e94ee07b1d439e7ffacc0b (patch) | |
tree | 33714b71b0f9fc1c73fccdd4b1ed25321adc99fa /date.h | |
parent | 5fb6c9e1cc073ad96d62efc423e87d79d38d435a (diff) | |
download | openttd-e159ada7a2a0367c99e94ee07b1d439e7ffacc0b.tar.xz |
(svn r5975) -Cleanup: use ORIGINAL_BASE_YEAR & ORIGINAL_MAX_YEAR where the functions really depend on the original date format.
-Cleanup: use DAYS_TILL_ORIGINAL_BASE_YEAR where the date variables are in the old date format and conversions are needed.
-Cleanup: replace one (forgotten) instance of uint16 with Date.
Diffstat (limited to 'date.h')
-rw-r--r-- | date.h | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -8,7 +8,28 @@ */ #define DAY_TICKS 74 +/* + * ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR and DAYS_TILL_ORIGINAL_BASE_YEAR are + * primarily used for loading newgrf and savegame data and returning some + * newgrf (callback) functions that were in the original (TTD) inherited + * format, where '_date == 0' meant that it was 1920-01-01. + */ + +/** The minimum starting year/base year of the original TTD */ +#define ORIGINAL_BASE_YEAR 1920 +/** The maximum year of the original TTD */ +#define ORIGINAL_MAX_YEAR 2090 + +/** + * The offset in days from the '_date == 0' till + * 'ConvertYMDToDate(ORIGINAL_BASE_YEAR, 0, 1)' + */ +#define DAYS_TILL_ORIGINAL_BASE_YEAR 0 + +/* Temporary value to make transition to full past 2090 easier/more clear */ #define BASE_YEAR 1920 + +/* The absolute minimum & maximum years in OTTD */ #define MIN_YEAR 1920 #define MAX_YEAR 2090 |