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305 lines
12 KiB
C++
305 lines
12 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file date.cpp Handling of dates in our native format and transforming them to something human readable. */
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#include "stdafx.h"
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#include "network/network.h"
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#include "network/network_func.h"
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#include "currency.h"
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#include "window_func.h"
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#include "settings_type.h"
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#include "date_func.h"
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#include "vehicle_base.h"
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#include "rail_gui.h"
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#include "linkgraph/linkgraph.h"
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#include "saveload/saveload.h"
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#include "newgrf_profiling.h"
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#include "safeguards.h"
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Year _cur_year; ///< Current year, starting at 0
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Month _cur_month; ///< Current month (0..11)
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Date _date; ///< Current date in days (day counter)
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DateFract _date_fract; ///< Fractional part of the day.
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uint16 _tick_counter; ///< Ever incrementing (and sometimes wrapping) tick counter for setting off various events
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int32 _old_ending_year_slv_105; ///< Old ending year for savegames before SLV_105
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/**
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* Set the date.
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* @param date New date
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* @param fract The number of ticks that have passed on this date.
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*/
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void SetDate(Date date, DateFract fract)
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{
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assert(fract < DAY_TICKS);
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YearMonthDay ymd;
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_date = date;
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_date_fract = fract;
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ConvertDateToYMD(date, &ymd);
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_cur_year = ymd.year;
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_cur_month = ymd.month;
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}
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#define M(a, b) ((a << 5) | b)
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static const uint16 _month_date_from_year_day[] = {
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M( 0, 1), M( 0, 2), M( 0, 3), M( 0, 4), M( 0, 5), M( 0, 6), M( 0, 7), M( 0, 8), M( 0, 9), M( 0, 10), M( 0, 11), M( 0, 12), M( 0, 13), M( 0, 14), M( 0, 15), M( 0, 16), M( 0, 17), M( 0, 18), M( 0, 19), M( 0, 20), M( 0, 21), M( 0, 22), M( 0, 23), M( 0, 24), M( 0, 25), M( 0, 26), M( 0, 27), M( 0, 28), M( 0, 29), M( 0, 30), M( 0, 31),
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M( 1, 1), M( 1, 2), M( 1, 3), M( 1, 4), M( 1, 5), M( 1, 6), M( 1, 7), M( 1, 8), M( 1, 9), M( 1, 10), M( 1, 11), M( 1, 12), M( 1, 13), M( 1, 14), M( 1, 15), M( 1, 16), M( 1, 17), M( 1, 18), M( 1, 19), M( 1, 20), M( 1, 21), M( 1, 22), M( 1, 23), M( 1, 24), M( 1, 25), M( 1, 26), M( 1, 27), M( 1, 28), M( 1, 29),
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M( 2, 1), M( 2, 2), M( 2, 3), M( 2, 4), M( 2, 5), M( 2, 6), M( 2, 7), M( 2, 8), M( 2, 9), M( 2, 10), M( 2, 11), M( 2, 12), M( 2, 13), M( 2, 14), M( 2, 15), M( 2, 16), M( 2, 17), M( 2, 18), M( 2, 19), M( 2, 20), M( 2, 21), M( 2, 22), M( 2, 23), M( 2, 24), M( 2, 25), M( 2, 26), M( 2, 27), M( 2, 28), M( 2, 29), M( 2, 30), M( 2, 31),
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M( 3, 1), M( 3, 2), M( 3, 3), M( 3, 4), M( 3, 5), M( 3, 6), M( 3, 7), M( 3, 8), M( 3, 9), M( 3, 10), M( 3, 11), M( 3, 12), M( 3, 13), M( 3, 14), M( 3, 15), M( 3, 16), M( 3, 17), M( 3, 18), M( 3, 19), M( 3, 20), M( 3, 21), M( 3, 22), M( 3, 23), M( 3, 24), M( 3, 25), M( 3, 26), M( 3, 27), M( 3, 28), M( 3, 29), M( 3, 30),
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M( 4, 1), M( 4, 2), M( 4, 3), M( 4, 4), M( 4, 5), M( 4, 6), M( 4, 7), M( 4, 8), M( 4, 9), M( 4, 10), M( 4, 11), M( 4, 12), M( 4, 13), M( 4, 14), M( 4, 15), M( 4, 16), M( 4, 17), M( 4, 18), M( 4, 19), M( 4, 20), M( 4, 21), M( 4, 22), M( 4, 23), M( 4, 24), M( 4, 25), M( 4, 26), M( 4, 27), M( 4, 28), M( 4, 29), M( 4, 30), M( 4, 31),
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M( 5, 1), M( 5, 2), M( 5, 3), M( 5, 4), M( 5, 5), M( 5, 6), M( 5, 7), M( 5, 8), M( 5, 9), M( 5, 10), M( 5, 11), M( 5, 12), M( 5, 13), M( 5, 14), M( 5, 15), M( 5, 16), M( 5, 17), M( 5, 18), M( 5, 19), M( 5, 20), M( 5, 21), M( 5, 22), M( 5, 23), M( 5, 24), M( 5, 25), M( 5, 26), M( 5, 27), M( 5, 28), M( 5, 29), M( 5, 30),
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M( 6, 1), M( 6, 2), M( 6, 3), M( 6, 4), M( 6, 5), M( 6, 6), M( 6, 7), M( 6, 8), M( 6, 9), M( 6, 10), M( 6, 11), M( 6, 12), M( 6, 13), M( 6, 14), M( 6, 15), M( 6, 16), M( 6, 17), M( 6, 18), M( 6, 19), M( 6, 20), M( 6, 21), M( 6, 22), M( 6, 23), M( 6, 24), M( 6, 25), M( 6, 26), M( 6, 27), M( 6, 28), M( 6, 29), M( 6, 30), M( 6, 31),
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M( 7, 1), M( 7, 2), M( 7, 3), M( 7, 4), M( 7, 5), M( 7, 6), M( 7, 7), M( 7, 8), M( 7, 9), M( 7, 10), M( 7, 11), M( 7, 12), M( 7, 13), M( 7, 14), M( 7, 15), M( 7, 16), M( 7, 17), M( 7, 18), M( 7, 19), M( 7, 20), M( 7, 21), M( 7, 22), M( 7, 23), M( 7, 24), M( 7, 25), M( 7, 26), M( 7, 27), M( 7, 28), M( 7, 29), M( 7, 30), M( 7, 31),
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M( 8, 1), M( 8, 2), M( 8, 3), M( 8, 4), M( 8, 5), M( 8, 6), M( 8, 7), M( 8, 8), M( 8, 9), M( 8, 10), M( 8, 11), M( 8, 12), M( 8, 13), M( 8, 14), M( 8, 15), M( 8, 16), M( 8, 17), M( 8, 18), M( 8, 19), M( 8, 20), M( 8, 21), M( 8, 22), M( 8, 23), M( 8, 24), M( 8, 25), M( 8, 26), M( 8, 27), M( 8, 28), M( 8, 29), M( 8, 30),
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M( 9, 1), M( 9, 2), M( 9, 3), M( 9, 4), M( 9, 5), M( 9, 6), M( 9, 7), M( 9, 8), M( 9, 9), M( 9, 10), M( 9, 11), M( 9, 12), M( 9, 13), M( 9, 14), M( 9, 15), M( 9, 16), M( 9, 17), M( 9, 18), M( 9, 19), M( 9, 20), M( 9, 21), M( 9, 22), M( 9, 23), M( 9, 24), M( 9, 25), M( 9, 26), M( 9, 27), M( 9, 28), M( 9, 29), M( 9, 30), M( 9, 31),
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M(10, 1), M(10, 2), M(10, 3), M(10, 4), M(10, 5), M(10, 6), M(10, 7), M(10, 8), M(10, 9), M(10, 10), M(10, 11), M(10, 12), M(10, 13), M(10, 14), M(10, 15), M(10, 16), M(10, 17), M(10, 18), M(10, 19), M(10, 20), M(10, 21), M(10, 22), M(10, 23), M(10, 24), M(10, 25), M(10, 26), M(10, 27), M(10, 28), M(10, 29), M(10, 30),
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M(11, 1), M(11, 2), M(11, 3), M(11, 4), M(11, 5), M(11, 6), M(11, 7), M(11, 8), M(11, 9), M(11, 10), M(11, 11), M(11, 12), M(11, 13), M(11, 14), M(11, 15), M(11, 16), M(11, 17), M(11, 18), M(11, 19), M(11, 20), M(11, 21), M(11, 22), M(11, 23), M(11, 24), M(11, 25), M(11, 26), M(11, 27), M(11, 28), M(11, 29), M(11, 30), M(11, 31),
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};
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#undef M
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enum DaysTillMonth {
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ACCUM_JAN = 0,
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ACCUM_FEB = ACCUM_JAN + 31,
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ACCUM_MAR = ACCUM_FEB + 29,
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ACCUM_APR = ACCUM_MAR + 31,
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ACCUM_MAY = ACCUM_APR + 30,
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ACCUM_JUN = ACCUM_MAY + 31,
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ACCUM_JUL = ACCUM_JUN + 30,
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ACCUM_AUG = ACCUM_JUL + 31,
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ACCUM_SEP = ACCUM_AUG + 31,
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ACCUM_OCT = ACCUM_SEP + 30,
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ACCUM_NOV = ACCUM_OCT + 31,
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ACCUM_DEC = ACCUM_NOV + 30,
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};
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/** Number of days to pass from the first day in the year before reaching the first of a month. */
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static const uint16 _accum_days_for_month[] = {
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ACCUM_JAN, ACCUM_FEB, ACCUM_MAR, ACCUM_APR,
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ACCUM_MAY, ACCUM_JUN, ACCUM_JUL, ACCUM_AUG,
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ACCUM_SEP, ACCUM_OCT, ACCUM_NOV, ACCUM_DEC,
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};
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/**
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* Converts a Date to a Year, Month & Day.
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* @param date the date to convert from
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* @param ymd the year, month and day to write to
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*/
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void ConvertDateToYMD(Date date, YearMonthDay *ymd)
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{
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/* Year determination in multiple steps to account for leap
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* years. First do the large steps, then the smaller ones.
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*/
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/* There are 97 leap years in 400 years */
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Year yr = 400 * (date / (DAYS_IN_YEAR * 400 + 97));
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int rem = date % (DAYS_IN_YEAR * 400 + 97);
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uint16 x;
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if (rem >= DAYS_IN_YEAR * 100 + 25) {
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/* There are 25 leap years in the first 100 years after
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* every 400th year, as every 400th year is a leap year */
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yr += 100;
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rem -= DAYS_IN_YEAR * 100 + 25;
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/* There are 24 leap years in the next couple of 100 years */
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yr += 100 * (rem / (DAYS_IN_YEAR * 100 + 24));
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rem = (rem % (DAYS_IN_YEAR * 100 + 24));
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}
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if (!IsLeapYear(yr) && rem >= DAYS_IN_YEAR * 4) {
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/* The first 4 year of the century are not always a leap year */
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yr += 4;
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rem -= DAYS_IN_YEAR * 4;
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}
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/* There is 1 leap year every 4 years */
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yr += 4 * (rem / (DAYS_IN_YEAR * 4 + 1));
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rem = rem % (DAYS_IN_YEAR * 4 + 1);
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/* The last (max 3) years to account for; the first one
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* can be, but is not necessarily a leap year */
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while (rem >= (IsLeapYear(yr) ? DAYS_IN_LEAP_YEAR : DAYS_IN_YEAR)) {
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rem -= IsLeapYear(yr) ? DAYS_IN_LEAP_YEAR : DAYS_IN_YEAR;
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yr++;
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}
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/* Skip the 29th of February in non-leap years */
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if (!IsLeapYear(yr) && rem >= ACCUM_MAR - 1) rem++;
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ymd->year = yr;
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x = _month_date_from_year_day[rem];
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ymd->month = x >> 5;
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ymd->day = x & 0x1F;
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}
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/**
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* Converts a tuple of Year, Month and Day to a Date.
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* @param year is a number between 0..MAX_YEAR
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* @param month is a number between 0..11
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* @param day is a number between 1..31
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*/
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Date ConvertYMDToDate(Year year, Month month, Day day)
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{
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/* Day-offset in a leap year */
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int days = _accum_days_for_month[month] + day - 1;
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/* Account for the missing of the 29th of February in non-leap years */
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if (!IsLeapYear(year) && days >= ACCUM_MAR) days--;
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return DAYS_TILL(year) + days;
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}
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/** Functions used by the IncreaseDate function */
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extern void EnginesDailyLoop();
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extern void DisasterDailyLoop();
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extern void IndustryDailyLoop();
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extern void CompaniesMonthlyLoop();
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extern void EnginesMonthlyLoop();
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extern void TownsMonthlyLoop();
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extern void IndustryMonthlyLoop();
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extern void StationMonthlyLoop();
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extern void SubsidyMonthlyLoop();
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extern void CompaniesYearlyLoop();
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extern void VehiclesYearlyLoop();
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extern void TownsYearlyLoop();
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extern void ShowEndGameChart();
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/** Available settings for autosave intervals. */
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static const Month _autosave_months[] = {
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0, ///< never
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1, ///< every month
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3, ///< every 3 months
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6, ///< every 6 months
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12, ///< every 12 months
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};
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/**
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* Runs various procedures that have to be done yearly
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*/
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static void OnNewYear()
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{
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CompaniesYearlyLoop();
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VehiclesYearlyLoop();
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TownsYearlyLoop();
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InvalidateWindowClassesData(WC_BUILD_STATION);
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if (_network_server) NetworkServerYearlyLoop();
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if (_cur_year == _settings_client.gui.semaphore_build_before) ResetSignalVariant();
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/* check if we reached end of the game (end of ending year) */
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if (_cur_year == _settings_game.game_creation.ending_year + 1) {
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ShowEndGameChart();
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/* check if we reached the maximum year, decrement dates by a year */
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} else if (_cur_year == MAX_YEAR + 1) {
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int days_this_year;
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_cur_year--;
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days_this_year = IsLeapYear(_cur_year) ? DAYS_IN_LEAP_YEAR : DAYS_IN_YEAR;
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_date -= days_this_year;
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for (Vehicle *v : Vehicle::Iterate()) v->date_of_last_service -= days_this_year;
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for (LinkGraph *lg : LinkGraph::Iterate()) lg->ShiftDates(-days_this_year);
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/* Because the _date wraps here, and text-messages expire by game-days, we have to clean out
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* all of them if the date is set back, else those messages will hang for ever */
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NetworkInitChatMessage();
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}
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if (_settings_client.gui.auto_euro) CheckSwitchToEuro();
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}
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/**
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* Runs various procedures that have to be done monthly
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*/
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static void OnNewMonth()
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{
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if (_settings_client.gui.autosave != 0 && (_cur_month % _autosave_months[_settings_client.gui.autosave]) == 0) {
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_do_autosave = true;
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SetWindowDirty(WC_STATUS_BAR, 0);
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}
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SetWindowClassesDirty(WC_CHEATS);
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CompaniesMonthlyLoop();
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EnginesMonthlyLoop();
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TownsMonthlyLoop();
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IndustryMonthlyLoop();
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SubsidyMonthlyLoop();
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StationMonthlyLoop();
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if (_network_server) NetworkServerMonthlyLoop();
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}
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/**
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* Runs various procedures that have to be done daily
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*/
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static void OnNewDay()
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{
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if (!_newgrf_profilers.empty() && _newgrf_profile_end_date <= _date) {
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NewGRFProfiler::FinishAll();
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}
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if (_network_server) NetworkServerDailyLoop();
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DisasterDailyLoop();
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IndustryDailyLoop();
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SetWindowWidgetDirty(WC_STATUS_BAR, 0, 0);
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EnginesDailyLoop();
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/* Refresh after possible snowline change */
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SetWindowClassesDirty(WC_TOWN_VIEW);
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}
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/**
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* Increases the tick counter, increases date and possibly calls
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* procedures that have to be called daily, monthly or yearly.
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*/
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void IncreaseDate()
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{
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/* increase day, and check if a new day is there? */
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_tick_counter++;
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if (_game_mode == GM_MENU) return;
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_date_fract++;
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if (_date_fract < DAY_TICKS) return;
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_date_fract = 0;
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/* increase day counter */
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_date++;
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YearMonthDay ymd;
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ConvertDateToYMD(_date, &ymd);
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/* check if we entered a new month? */
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bool new_month = ymd.month != _cur_month;
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/* check if we entered a new year? */
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bool new_year = ymd.year != _cur_year;
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/* update internal variables before calling the daily/monthly/yearly loops */
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_cur_month = ymd.month;
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_cur_year = ymd.year;
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/* yes, call various daily loops */
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OnNewDay();
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/* yes, call various monthly loops */
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if (new_month) OnNewMonth();
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/* yes, call various yearly loops */
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if (new_year) OnNewYear();
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}
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