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@@ -12,72 +12,5 @@
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#include "timer/timer_game_calendar.h"
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static const int 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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static const int MONTHS_IN_YEAR = 12; ///< months per year
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static const int SECONDS_PER_DAY = 2; ///< approximate seconds per day, not for precise calculations
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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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* primarily used for loading newgrf and savegame data and returning some
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* newgrf (callback) functions that were in the original (TTD) inherited
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* format, where 'TimerGameCalendar::date == 0' meant that it was 1920-01-01.
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*/
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/** The minimum starting year/base year of the original TTD */
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static constexpr TimerGameCalendar::Year ORIGINAL_BASE_YEAR = 1920;
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/** The original ending year */
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static constexpr TimerGameCalendar::Year ORIGINAL_END_YEAR = 2051;
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/** The maximum year of the original TTD */
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static constexpr TimerGameCalendar::Year ORIGINAL_MAX_YEAR = 2090;
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/**
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* Calculate the date of the first day of a given year.
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* @param year the year to get the first day of.
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* @return the date.
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*/
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static constexpr TimerGameCalendar::Date DateAtStartOfYear(TimerGameCalendar::Year year)
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{
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int32_t year_as_int = static_cast<int32_t>(year);
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uint number_of_leap_years = (year == 0) ? 0 : ((year_as_int - 1) / 4 - (year_as_int - 1) / 100 + (year_as_int - 1) / 400 + 1);
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return (DAYS_IN_YEAR * year_as_int) + number_of_leap_years;
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}
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/**
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* Calculate the year of a given date.
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* @param date The date to consider.
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* @return the year.
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*/
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static inline TimerGameCalendar::Year DateToYear(TimerGameCalendar::Date date)
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{
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return static_cast<int32_t>(date) / DAYS_IN_LEAP_YEAR;
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}
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/**
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* The date of the first day of the original base year.
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*/
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static constexpr TimerGameCalendar::Date DAYS_TILL_ORIGINAL_BASE_YEAR = DateAtStartOfYear(ORIGINAL_BASE_YEAR);
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/** The absolute minimum & maximum years in OTTD */
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static constexpr TimerGameCalendar::Year MIN_YEAR = 0;
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/** The default starting year */
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static constexpr TimerGameCalendar::Year DEF_START_YEAR = 1950;
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/** The default scoring end year */
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static constexpr TimerGameCalendar::Year DEF_END_YEAR = ORIGINAL_END_YEAR - 1;
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/**
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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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*/
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static constexpr TimerGameCalendar::Year MAX_YEAR = 5000000;
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/** The date of the last day of the max year. */
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static constexpr TimerGameCalendar::Date MAX_DATE = DateAtStartOfYear(MAX_YEAR + 1) - 1;
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static constexpr TimerGameCalendar::Year INVALID_YEAR = -1; ///< Representation of an invalid year
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static constexpr TimerGameCalendar::Date INVALID_DATE = -1; ///< Representation of an invalid date
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#endif /* DATE_TYPE_H */
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