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@ -12,17 +12,24 @@
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#ifndef DATE_TYPE_H
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#ifndef DATE_TYPE_H
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#define DATE_TYPE_H
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#define DATE_TYPE_H
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typedef int32 Date; ///< The type to store our dates in
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typedef uint16 DateFract; ///< The fraction of a date we're in, i.e. the number of ticks since the last date changeover
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typedef int32 Ticks; ///< The type to store ticks in
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typedef int32 Year; ///< Type for the year, note: 0 based, i.e. starts at the year 0.
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typedef uint8 Month; ///< Type for the month, note: 0 based, i.e. 0 = January, 11 = December.
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typedef uint8 Day; ///< Type for the day of the month, note: 1 based, first day of a month is 1.
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/**
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/**
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* 1 day is 74 ticks; _date_fract used to be uint16 and incremented by 885. On
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* 1 day is 74 ticks; _date_fract used to be uint16 and incremented by 885. On
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* an overflow the new day begun and 65535 / 885 = 74.
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* an overflow the new day begun and 65535 / 885 = 74.
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* 1 tick is approximately 30 ms.
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* 1 tick is approximately 30 ms.
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* 1 day is thus about 2 seconds (74 * 30 = 2220) on a machine that can run OpenTTD normally
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* 1 day is thus about 2 seconds (74 * 30 = 2220) on a machine that can run OpenTTD normally
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*/
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*/
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enum {
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static const int DAY_TICKS = 74; ///< ticks per day
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DAY_TICKS = 74, ///< ticks per day
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static const int DAYS_IN_YEAR = 365; ///< days per year
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DAYS_IN_YEAR = 365, ///< days per year
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static const int DAYS_IN_LEAP_YEAR = 366; ///< sometimes, you need one day more...
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DAYS_IN_LEAP_YEAR = 366, ///< sometimes, you need one day more...
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};
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/*
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/*
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* ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR and DAYS_TILL_ORIGINAL_BASE_YEAR are
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* ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR and DAYS_TILL_ORIGINAL_BASE_YEAR are
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@ -32,11 +39,11 @@ enum {
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*/
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*/
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/** The minimum starting year/base year of the original TTD */
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/** The minimum starting year/base year of the original TTD */
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#define ORIGINAL_BASE_YEAR 1920
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static const Year ORIGINAL_BASE_YEAR = 1920;
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/** The original ending year */
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/** The original ending year */
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#define ORIGINAL_END_YEAR 2051
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static const Year ORIGINAL_END_YEAR = 2051;
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/** The maximum year of the original TTD */
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/** The maximum year of the original TTD */
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#define ORIGINAL_MAX_YEAR 2090
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static const Year ORIGINAL_MAX_YEAR = 2090;
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/**
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/**
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* Calculate the number of leap years till a given year.
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* Calculate the number of leap years till a given year.
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@ -66,28 +73,20 @@ enum {
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#define DAYS_TILL_ORIGINAL_BASE_YEAR DAYS_TILL(ORIGINAL_BASE_YEAR)
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#define DAYS_TILL_ORIGINAL_BASE_YEAR DAYS_TILL(ORIGINAL_BASE_YEAR)
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/** The absolute minimum & maximum years in OTTD */
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/** The absolute minimum & maximum years in OTTD */
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#define MIN_YEAR 0
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static const Year MIN_YEAR = 0;
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/** The default starting year */
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/** The default starting year */
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#define DEF_START_YEAR 1950
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static const Year DEF_START_YEAR = 1950;
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/**
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/**
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* MAX_YEAR, nicely rounded value of the number of years that can
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* MAX_YEAR, nicely rounded value of the number of years that can
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* be encoded in a single 32 bits date, about 2^31 / 366 years.
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* be encoded in a single 32 bits date, about 2^31 / 366 years.
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*/
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*/
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#define MAX_YEAR 5000000
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static const Year MAX_YEAR = 5000000;
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/** The number of days till the last day */
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/** The number of days till the last day */
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#define MAX_DAY (DAYS_TILL(MAX_YEAR + 1) - 1)
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#define MAX_DAY (DAYS_TILL(MAX_YEAR + 1) - 1)
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typedef int32 Date; ///< The type to store our dates in
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typedef uint16 DateFract; ///< The fraction of a date we're in, i.e. the number of ticks since the last date changeover
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typedef int32 Ticks; ///< The type to store ticks in
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typedef int32 Year; ///< Type for the year, note: 0 based, i.e. starts at the year 0.
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typedef uint8 Month; ///< Type for the month, note: 0 based, i.e. 0 = January, 11 = December.
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typedef uint8 Day; ///< Type for the day of the month, note: 1 based, first day of a month is 1.
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/**
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/**
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* Data structure to convert between Date and triplet (year, month, and day).
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* Data structure to convert between Date and triplet (year, month, and day).
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* @see ConvertDateToYMD(), ConvertYMDToDate()
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* @see ConvertDateToYMD(), ConvertYMDToDate()
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