# date.cpp File Reference

Handling of dates in our native format and transforming them to something human readable. More...

`#include "stdafx.h"`
`#include "variables.h"`
`#include "network/network.h"`
`#include "network/network_func.h"`
`#include "currency.h"`
`#include "window_func.h"`
`#include "functions.h"`
`#include "date_func.h"`
`#include "vehicle_base.h"`
`#include "debug.h"`
`#include "rail_gui.h"`
`#include "saveload/saveload.h"`

Go to the source code of this file.

## Defines
#define | M(a, b) ((a << 5) | b)
## Enumerations
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 }
## Functions
void | SetDate (Date date)
void | ConvertDateToYMD (Date date, YearMonthDay *ymd)
| Converts a Date to a Year, Month & Day.
Date | ConvertYMDToDate (Year year, Month month, Day day)
| Converts a tupe of Year, Month and Day to a Date.
void | EnginesDailyLoop ()
| Functions used by the IncreaseDate function.
void | DisasterDailyLoop ()
void | IndustryDailyLoop ()
| Daily handler for the industry changes Taking the original map size of 256*256, the number of random changes was always of just one unit.
void | CompaniesMonthlyLoop ()
void | EnginesMonthlyLoop ()
void | TownsMonthlyLoop ()
void | IndustryMonthlyLoop ()
void | StationMonthlyLoop ()
void | SubsidyMonthlyLoop ()
void | CompaniesYearlyLoop ()
void | VehiclesYearlyLoop ()
void | TownsYearlyLoop ()
void | ShowEndGameChart ()
| Show the endgame victory screen in 2050.
static void | OnNewYear ()
| Runs various procedures that have to be done yearly.
static void | OnNewMonth ()
| Runs various procedures that have to be done monthly.
static void | OnNewDay ()
| Runs various procedures that have to be done daily.
void | IncreaseDate ()
| Increases the tick counter, increases date and possibly calls procedures that have to be called daily, monthly or yearly.
## Variables
Year | _cur_year
| Current year, starting at 0.
Month | _cur_month
| Current month (0..11).
Date | _date
| Current date in days (day counter).
DateFract | _date_fract
static const uint16 | _month_date_from_year_day []
static const uint16 | _accum_days_for_month []
static const Month | _autosave_months []

## Detailed Description

Handling of dates in our native format and transforming them to something human readable.

Definition in file date.cpp.

## Function Documentation

void ConvertDateToYMD | ( | Date | date,
|  | YearMonthDay * | ymd |
| ) |  |  |

Converts a Date to a Year, Month & Day.

Parameters:

  | date | the date to convert from
  | ymd | the year, month and day to write to

Definition at line 84 of file date.cpp.

References YearMonthDay::day, DAYS_IN_LEAP_YEAR, DAYS_IN_YEAR, YearMonthDay::month, and YearMonthDay::year.

Referenced by ClickChangeDateCheat(), DrawVehiclePurchaseInfo(), CrashLog::FillCrashLog(), AIDate::GetDayOfMonth(), GetGlobalVariable(), AIDate::GetMonth(), GetSnowLine(), AIDate::GetYear(), IncreaseDate(), and SetDateWindow::SetDateWindow().

Date ConvertYMDToDate | ( | Year | year,
|  | Month | month,
|  | Day | day |
| ) |  |  |

Converts a tupe of Year, Month and Day to a Date.

Parameters:

  | year | is a number between 0..MAX_YEAR
  | month | is a number between 0..11
  | day | is a number between 1..31

Definition at line 140 of file date.cpp.

References DAYS_TILL.

Referenced by ClickChangeDateCheat(), FixTTOEngines(), GenerateWorld(), AIDate::GetDate(), GetGlobalVariable(), and SetDateWindow::OnClick().

void IndustryDailyLoop | ( |  | ) |

Daily handler for the industry changes Taking the original map size of 256*256, the number of random changes was always of just one unit.

But it cannot be the same on smaller or bigger maps. That number has to be scaled up or down. For small maps, it implies that less than one change per month is required, while on bigger maps, it would be way more. The daily loop handles those changes.

Definition at line 2324 of file industry_cmd.cpp.

References Chance16(), ChangeIndustryProduction(), Industry::GetRandom(), InvalidateWindowData(), MaybeNewIndustry(), and OWNER_NONE.

Referenced by OnNewDay().

void ShowEndGameChart | ( |  | ) |

Show the endgame victory screen in 2050.

Update the new highscore if it was high enough

Definition at line 230 of file highscore_gui.cpp.

References DeleteWindowByClass(), and HideVitalWindows().

Referenced by OnNewYear().

## Variable Documentation

const uint16 _accum_days_for_month[]`[static]`

Initial value:

     {
      ACCUM_JAN, ACCUM_FEB, ACCUM_MAR, ACCUM_APR,
      ACCUM_MAY, ACCUM_JUN, ACCUM_JUL, ACCUM_AUG,
      ACCUM_SEP, ACCUM_OCT, ACCUM_NOV, ACCUM_DEC,
    }

Definition at line 73 of file date.cpp.

const Month _autosave_months[]`[static]`

Initial value:

     {
       0,
       1,
       3,
       6,
      12,
    }

Definition at line 170 of file date.cpp.

const uint16 _month_date_from_year_day[]`[static]`

Initial value:

     {
      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),
    }

Definition at line 42 of file date.cpp.