2 * This file is part of OpenTTD.
3 * 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.
4 * 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.
5 * 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/>.
8 /** @file date.cpp Handling of dates in our native format and transforming them to something human readable. */
11 #include "network/network.h"
12 #include "network/network_func.h"
14 #include "window_func.h"
15 #include "settings_type.h"
16 #include "date_func.h"
17 #include "vehicle_base.h"
19 #include "linkgraph/linkgraph.h"
20 #include "saveload/saveload.h"
21 #include "newgrf_profiling.h"
23 #include "safeguards.h"
25 Year _cur_year
; ///< Current year, starting at 0
26 Month _cur_month
; ///< Current month (0..11)
27 Date _date
; ///< Current date in days (day counter)
28 DateFract _date_fract
; ///< Fractional part of the day.
29 uint16 _tick_counter
; ///< Ever incrementing (and sometimes wrapping) tick counter for setting off various events
31 int32 _old_ending_year_slv_105
; ///< Old ending year for savegames before SLV_105
35 * @param date New date
36 * @param fract The number of ticks that have passed on this date.
38 void SetDate(Date date
, DateFract fract
)
40 assert(fract
< DAY_TICKS
);
46 ConvertDateToYMD(date
, &ymd
);
48 _cur_month
= ymd
.month
;
51 #define M(a, b) ((a << 5) | b)
52 static const uint16 _month_date_from_year_day
[] = {
53 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),
54 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),
55 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),
56 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),
57 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),
58 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),
59 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),
60 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),
61 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),
62 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),
63 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),
64 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),
70 ACCUM_FEB
= ACCUM_JAN
+ 31,
71 ACCUM_MAR
= ACCUM_FEB
+ 29,
72 ACCUM_APR
= ACCUM_MAR
+ 31,
73 ACCUM_MAY
= ACCUM_APR
+ 30,
74 ACCUM_JUN
= ACCUM_MAY
+ 31,
75 ACCUM_JUL
= ACCUM_JUN
+ 30,
76 ACCUM_AUG
= ACCUM_JUL
+ 31,
77 ACCUM_SEP
= ACCUM_AUG
+ 31,
78 ACCUM_OCT
= ACCUM_SEP
+ 30,
79 ACCUM_NOV
= ACCUM_OCT
+ 31,
80 ACCUM_DEC
= ACCUM_NOV
+ 30,
83 /** Number of days to pass from the first day in the year before reaching the first of a month. */
84 static const uint16 _accum_days_for_month
[] = {
85 ACCUM_JAN
, ACCUM_FEB
, ACCUM_MAR
, ACCUM_APR
,
86 ACCUM_MAY
, ACCUM_JUN
, ACCUM_JUL
, ACCUM_AUG
,
87 ACCUM_SEP
, ACCUM_OCT
, ACCUM_NOV
, ACCUM_DEC
,
91 * Converts a Date to a Year, Month & Day.
92 * @param date the date to convert from
93 * @param ymd the year, month and day to write to
95 void ConvertDateToYMD(Date date
, YearMonthDay
*ymd
)
97 /* Year determination in multiple steps to account for leap
98 * years. First do the large steps, then the smaller ones.
101 /* There are 97 leap years in 400 years */
102 Year yr
= 400 * (date
/ (DAYS_IN_YEAR
* 400 + 97));
103 int rem
= date
% (DAYS_IN_YEAR
* 400 + 97);
106 if (rem
>= DAYS_IN_YEAR
* 100 + 25) {
107 /* There are 25 leap years in the first 100 years after
108 * every 400th year, as every 400th year is a leap year */
110 rem
-= DAYS_IN_YEAR
* 100 + 25;
112 /* There are 24 leap years in the next couple of 100 years */
113 yr
+= 100 * (rem
/ (DAYS_IN_YEAR
* 100 + 24));
114 rem
= (rem
% (DAYS_IN_YEAR
* 100 + 24));
117 if (!IsLeapYear(yr
) && rem
>= DAYS_IN_YEAR
* 4) {
118 /* The first 4 year of the century are not always a leap year */
120 rem
-= DAYS_IN_YEAR
* 4;
123 /* There is 1 leap year every 4 years */
124 yr
+= 4 * (rem
/ (DAYS_IN_YEAR
* 4 + 1));
125 rem
= rem
% (DAYS_IN_YEAR
* 4 + 1);
127 /* The last (max 3) years to account for; the first one
128 * can be, but is not necessarily a leap year */
129 while (rem
>= (IsLeapYear(yr
) ? DAYS_IN_LEAP_YEAR
: DAYS_IN_YEAR
)) {
130 rem
-= IsLeapYear(yr
) ? DAYS_IN_LEAP_YEAR
: DAYS_IN_YEAR
;
134 /* Skip the 29th of February in non-leap years */
135 if (!IsLeapYear(yr
) && rem
>= ACCUM_MAR
- 1) rem
++;
139 x
= _month_date_from_year_day
[rem
];
145 * Converts a tuple of Year, Month and Day to a Date.
146 * @param year is a number between 0..MAX_YEAR
147 * @param month is a number between 0..11
148 * @param day is a number between 1..31
150 Date
ConvertYMDToDate(Year year
, Month month
, Day day
)
152 /* Day-offset in a leap year */
153 int days
= _accum_days_for_month
[month
] + day
- 1;
155 /* Account for the missing of the 29th of February in non-leap years */
156 if (!IsLeapYear(year
) && days
>= ACCUM_MAR
) days
--;
158 return DAYS_TILL(year
) + days
;
161 /** Functions used by the IncreaseDate function */
163 extern void EnginesDailyLoop();
164 extern void DisasterDailyLoop();
165 extern void IndustryDailyLoop();
167 extern void CompaniesMonthlyLoop();
168 extern void EnginesMonthlyLoop();
169 extern void TownsMonthlyLoop();
170 extern void IndustryMonthlyLoop();
171 extern void StationMonthlyLoop();
172 extern void SubsidyMonthlyLoop();
174 extern void CompaniesYearlyLoop();
175 extern void VehiclesYearlyLoop();
176 extern void TownsYearlyLoop();
178 extern void ShowEndGameChart();
181 /** Available settings for autosave intervals. */
182 static const Month _autosave_months
[] = {
185 3, ///< every 3 months
186 6, ///< every 6 months
187 12, ///< every 12 months
191 * Runs various procedures that have to be done yearly
193 static void OnNewYear()
195 CompaniesYearlyLoop();
196 VehiclesYearlyLoop();
198 InvalidateWindowClassesData(WC_BUILD_STATION
);
199 if (_network_server
) NetworkServerYearlyLoop();
201 if (_cur_year
== _settings_client
.gui
.semaphore_build_before
) ResetSignalVariant();
203 /* check if we reached end of the game (end of ending year) */
204 if (_cur_year
== _settings_game
.game_creation
.ending_year
+ 1) {
206 /* check if we reached the maximum year, decrement dates by a year */
207 } else if (_cur_year
== MAX_YEAR
+ 1) {
211 days_this_year
= IsLeapYear(_cur_year
) ? DAYS_IN_LEAP_YEAR
: DAYS_IN_YEAR
;
212 _date
-= days_this_year
;
213 for (Vehicle
*v
: Vehicle::Iterate()) v
->date_of_last_service
-= days_this_year
;
214 for (LinkGraph
*lg
: LinkGraph::Iterate()) lg
->ShiftDates(-days_this_year
);
216 /* Because the _date wraps here, and text-messages expire by game-days, we have to clean out
217 * all of them if the date is set back, else those messages will hang for ever */
218 NetworkInitChatMessage();
221 if (_settings_client
.gui
.auto_euro
) CheckSwitchToEuro();
225 * Runs various procedures that have to be done monthly
227 static void OnNewMonth()
229 if (_settings_client
.gui
.autosave
!= 0 && (_cur_month
% _autosave_months
[_settings_client
.gui
.autosave
]) == 0) {
231 SetWindowDirty(WC_STATUS_BAR
, 0);
234 SetWindowClassesDirty(WC_CHEATS
);
235 CompaniesMonthlyLoop();
236 EnginesMonthlyLoop();
238 IndustryMonthlyLoop();
239 SubsidyMonthlyLoop();
240 StationMonthlyLoop();
241 if (_network_server
) NetworkServerMonthlyLoop();
245 * Runs various procedures that have to be done daily
247 static void OnNewDay()
249 if (!_newgrf_profilers
.empty() && _newgrf_profile_end_date
<= _date
) {
250 NewGRFProfiler::FinishAll();
253 if (_network_server
) NetworkServerDailyLoop();
258 SetWindowWidgetDirty(WC_STATUS_BAR
, 0, 0);
261 /* Refresh after possible snowline change */
262 SetWindowClassesDirty(WC_TOWN_VIEW
);
266 * Increases the tick counter, increases date and possibly calls
267 * procedures that have to be called daily, monthly or yearly.
271 /* increase day, and check if a new day is there? */
274 if (_game_mode
== GM_MENU
) return;
277 if (_date_fract
< DAY_TICKS
) return;
280 /* increase day counter */
284 ConvertDateToYMD(_date
, &ymd
);
286 /* check if we entered a new month? */
287 bool new_month
= ymd
.month
!= _cur_month
;
289 /* check if we entered a new year? */
290 bool new_year
= ymd
.year
!= _cur_year
;
292 /* update internal variables before calling the daily/monthly/yearly loops */
293 _cur_month
= ymd
.month
;
294 _cur_year
= ymd
.year
;
296 /* yes, call various daily loops */
299 /* yes, call various monthly loops */
300 if (new_month
) OnNewMonth();
302 /* yes, call various yearly loops */
303 if (new_year
) OnNewYear();