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OpenTTD-patches/date.c
rubidium 6fb092aa7a (svn r5999) -Feature: change the original date format to a 32 bits format based at the year 0. 
The game date subsystem now allows someone to start in the year 0 and continue
up to the year 5 000 000. However, you currently cannot build anything before 
1920 as there is no newgrf support for dates before 1920 or after 2090 yet.
2006-08-20 18:40:57 +00:00

296 lines
9.7 KiB
C
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/* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "date.h"
#include "variables.h"
#include "macros.h"
#include "vehicle.h"
#include "network.h"
#include "network_data.h"
#include "network_server.h"
#include "functions.h"
#include "currency.h"
Year _cur_year;
Month _cur_month;
Date _date;
DateFract _date_fract;
void SetDate(Date date)
{
YearMonthDay ymd;
_date = date;
ConvertDateToYMD(date, &ymd);
_cur_year = ymd.year;
_cur_month = ymd.month;
#ifdef ENABLE_NETWORK
_network_last_advertise_frame = 0;
_network_need_advertise = true;
#endif /* ENABLE_NETWORK */
}
#define M(a, b) ((a << 5) | b)
static const uint16 _month_date_from_year_day[] = {
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),
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),
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),
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),
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),
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),
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),
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),
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),
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),
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),
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),
};
#undef M
enum {
ACCUM_JAN = 0,
ACCUM_FEB = ACCUM_JAN + 31,
ACCUM_MAR = ACCUM_FEB + 29,
ACCUM_APR = ACCUM_MAR + 31,
ACCUM_MAY = ACCUM_APR + 30,
ACCUM_JUN = ACCUM_MAY + 31,
ACCUM_JUL = ACCUM_JUN + 30,
ACCUM_AUG = ACCUM_JUL + 31,
ACCUM_SEP = ACCUM_AUG + 31,
ACCUM_OCT = ACCUM_SEP + 30,
ACCUM_NOV = ACCUM_OCT + 31,
ACCUM_DEC = ACCUM_NOV + 30,
};
static const uint16 _accum_days_for_month[] = {
ACCUM_JAN, ACCUM_FEB, ACCUM_MAR, ACCUM_APR,
ACCUM_MAY, ACCUM_JUN, ACCUM_JUL, ACCUM_AUG,
ACCUM_SEP, ACCUM_OCT, ACCUM_NOV, ACCUM_DEC,
};
static inline bool IsLeapYear(Year yr)
{
return yr % 4 == 0 && (yr % 100 != 0 || yr % 400 == 0);
}
/**
* Converts a Date to a Year, Month & Day.
* @param date the date to convert from
* @param ymd the year, month and day to write to
*/
void ConvertDateToYMD(Date date, YearMonthDay *ymd)
{
/*
* Year determination in multiple steps to account for leap
* years. First do the large steps, then the smaller ones.
*/
/* There are 97 leap years in 400 years */
Year yr = 400 * (date / (365 * 400 + 97));
int rem = date % (365 * 400 + 97);
uint16 x;
/* There are 24 leap years in 100 years */
yr += 100 * (rem / (365 * 100 + 24));
rem = rem % (365 * 100 + 24);
/* There is 1 leap year every 4 years */
yr += 4 * (rem / (365 * 4 + 1));
rem = rem % (365 * 4 + 1);
/* The last (max 3) years to account for; the first one
* can be, but is not necessarily a leap year */
while (rem >= (IsLeapYear(yr) ? 366 : 365)) {
rem -= IsLeapYear(yr) ? 366 : 365;
yr++;
}
/* Skip the 29th of February in non-leap years */
if (!IsLeapYear(yr) && rem >= ACCUM_MAR - 1) rem++;
ymd->year = yr;
x = _month_date_from_year_day[rem];
ymd->month = x >> 5;
ymd->day = x & 0x1F;
}
/**
* Converts a tupe of Year, Month and Day to a Date.
* @param year is a number between 0..MAX_YEAR
* @param month is a number between 0..11
* @param day is a number between 1..31
*/
Date ConvertYMDToDate(Year year, Month month, Day day)
{
/*
* Each passed leap year adds one day to the 'day count'.
*
* A special case for the year 0 as no year has been passed,
* but '(year - 1) / 4' does not yield '-1' to counteract the
* '+1' at the end of the formula as divisions round to zero.
*/
int nr_of_leap_years = (year == 0) ? 0 : ((year - 1) / 4 - (year - 1) / 100 + (year - 1) / 400 + 1);
/* Day-offset in a leap year */
int days = _accum_days_for_month[month] + day - 1;
/* Account for the missing of the 29th of February in non-leap years */
if (!IsLeapYear(year) && days >= ACCUM_MAR) days--;
return year * 365 + nr_of_leap_years + days;
}
/** Functions used by the IncreaseDate function */
extern void OnNewDay_Train(Vehicle *v);
extern void OnNewDay_RoadVeh(Vehicle *v);
extern void OnNewDay_Aircraft(Vehicle *v);
extern void OnNewDay_Ship(Vehicle *v);
static void OnNewDay_EffectVehicle(Vehicle *v) { /* empty */ }
extern void OnNewDay_DisasterVehicle(Vehicle *v);
typedef void OnNewVehicleDayProc(Vehicle *v);
static OnNewVehicleDayProc * _on_new_vehicle_day_proc[] = {
OnNewDay_Train,
OnNewDay_RoadVeh,
OnNewDay_Ship,
OnNewDay_Aircraft,
OnNewDay_EffectVehicle,
OnNewDay_DisasterVehicle,
};
extern void WaypointsDailyLoop(void);
extern void TextMessageDailyLoop(void);
extern void EnginesDailyLoop(void);
extern void DisasterDailyLoop(void);
extern void PlayersMonthlyLoop(void);
extern void EnginesMonthlyLoop(void);
extern void TownsMonthlyLoop(void);
extern void IndustryMonthlyLoop(void);
extern void StationMonthlyLoop(void);
extern void PlayersYearlyLoop(void);
extern void TrainsYearlyLoop(void);
extern void RoadVehiclesYearlyLoop(void);
extern void AircraftYearlyLoop(void);
extern void ShipsYearlyLoop(void);
extern void ShowEndGameChart(void);
static const Month _autosave_months[] = {
0, // never
1, // every month
3, // every 3 months
6, // every 6 months
12, // every 12 months
};
/**
* Runs the day_proc for every DAY_TICKS vehicle starting at daytick.
*/
static void RunVehicleDayProc(uint daytick)
{
uint total = _vehicle_pool.total_items;
uint i;
for (i = daytick; i < total; i += DAY_TICKS) {
Vehicle *v = GetVehicle(i);
if (v->type != 0) _on_new_vehicle_day_proc[v->type - 0x10](v);
}
}
void IncreaseDate(void)
{
YearMonthDay ymd;
if (_game_mode == GM_MENU) {
_tick_counter++;
return;
}
RunVehicleDayProc(_date_fract);
/* increase day, and check if a new day is there? */
_tick_counter++;
_date_fract++;
if (_date_fract < DAY_TICKS) return;
_date_fract = 0;
/* yeah, increase day counter and call various daily loops */
_date++;
TextMessageDailyLoop();
DisasterDailyLoop();
WaypointsDailyLoop();
if (_game_mode != GM_MENU) {
InvalidateWindowWidget(WC_STATUS_BAR, 0, 0);
EnginesDailyLoop();
}
/* check if we entered a new month? */
ConvertDateToYMD(_date, &ymd);
if (ymd.month == _cur_month) return;
_cur_month = ymd.month;
/* yes, call various monthly loops */
if (_game_mode != GM_MENU) {
if (_opt.autosave != 0 && (_cur_month % _autosave_months[_opt.autosave]) == 0) {
_do_autosave = true;
RedrawAutosave();
}
PlayersMonthlyLoop();
EnginesMonthlyLoop();
TownsMonthlyLoop();
IndustryMonthlyLoop();
StationMonthlyLoop();
#ifdef ENABLE_NETWORK
if (_network_server) NetworkServerMonthlyLoop();
#endif /* ENABLE_NETWORK */
}
/* check if we entered a new year? */
if (ymd.year == _cur_year) return;
_cur_year = ymd.year;
/* yes, call various yearly loops */
PlayersYearlyLoop();
TrainsYearlyLoop();
RoadVehiclesYearlyLoop();
AircraftYearlyLoop();
ShipsYearlyLoop();
#ifdef ENABLE_NETWORK
if (_network_server) NetworkServerYearlyLoop();
#endif /* ENABLE_NETWORK */
/* check if we reached end of the game */
if (_cur_year == _patches.ending_year) {
ShowEndGameChart();
/* check if we reached the maximum year, decrement dates by a year */
} else if (_cur_year == MAX_YEAR + 1) {
Vehicle *v;
uint days_this_year;
_cur_year--;
days_this_year = IsLeapYear(_cur_year) ? 366 : 365;
_date -= days_this_year;
FOR_ALL_VEHICLES(v) v->date_of_last_service -= days_this_year;
/* Because the _date wraps here, and text-messages expire by game-days, we have to clean out
* all of them if the date is set back, else those messages will hang for ever */
InitTextMessage();
}
if (_patches.auto_euro) CheckSwitchToEuro();
}
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