public void SetGameYear(int gameYear, string gameExecutableFilePath)
{
// Calculate adjustment and invert sign
// e.g. if changing game year from 1998 to 2001, 1998-2001 = -3 = 3
// e.g. if changing game year from 1998 to 1995, 1998-1995 = 3 = -3
var adjustment = 1998 - gameYear;
adjustment = -adjustment;
// Game year of 2001 will now have an adjustment value of 3
// Game year of 1995 will now have an adjustment value of -3
var year1996 = 1996 + adjustment; // Effective game year value for 1996 is 1993/1999
var year1997 = 1997 + adjustment; // Effective game year value for 1997 is 1994/2000
var year1998 = 1998 + adjustment; // Effective game year value for 1998 is 1995/2001
var year1999 = 1999 + adjustment; // Effective game year value for 1999 is 1996/2002
var year2007 = 2007 + adjustment;
// Get first leap year from game starting year
var firstLeapYear = 0;
for (var i = gameYear; i < gameYear + 10; i++)
{
if (DateTime.IsLeapYear(i))
{
firstLeapYear = i;
break;
}
}
var secondLeapYear = firstLeapYear + 4;
var thirdLeapYear = secondLeapYear + 4;
var fourthLeapYear = thirdLeapYear + 4;
var yearAfterFirstLeapYear = firstLeapYear + 1;
var yearAfterSecondLeapYear = secondLeapYear + 1;
var gameStartDayOfWeek = (int)new DateTime(gameYear, 1, 1).DayOfWeek;
if (gameStartDayOfWeek == 0) // If Sunday
{
gameStartDayOfWeek = 7; // Make Sunday the 7th day to match DayOfWeek logic used in the game
}
int gameStartDate;
var date = 8; // The 8 in Sunday 8th March 1998 (default game start date)
while (true)
{
// If the game start date using new gameYear value is not a Sunday, increment date
// e.g. for 1999, the next Sunday after 8th March is 14th March
if (new DateTime(gameYear, 3, date).DayOfWeek != DayOfWeek.Sunday)
{
date++;
}
else
{
// Set start date to be a date that is a Sunday
gameStartDate = date;
break;
}
}
// The day of the week naturally increments each year for 1st January (e.g 1998 = Thursday, 1999 = Friday)
// But when the year follows a leap year, the day of the week should be incremented by two.
// e.g. if 2000 is a leap year and started on a Saturday, then 2001 starts on a Monday
// e.g. if 2004 is a leap year and started on a Thursday, then 2005 starts on a Saturday
// Note, where there are three leap years in a ten-year period, the day of the week will
// fall behind by one day as the game code only increments the day of the week twice, as
// it was assumed that there would only ever be two leap years between 1998-2007.
// Update all values affected by change in game year
using (var executableConnection = new ExecutableConnection(gameExecutableFilePath))
{
executableConnection.WriteByte(GameStartDateOffset, (byte)gameStartDate);
executableConnection.WriteInteger(GameStartDayOfWeekOffset, gameStartDayOfWeek);
executableConnection.WriteInteger(GameYear199601Offset, year1996);
executableConnection.WriteInteger(GameYear199602Offset, year1996);
executableConnection.WriteInteger(GameYear199603Offset, year1996);
executableConnection.WriteInteger(GameYear199604Offset, year1996);
executableConnection.WriteInteger(GameYear199605Offset, year1996);
executableConnection.WriteInteger(GameYear199701Offset, year1997);
executableConnection.WriteInteger(GameYear199702Offset, year1997);
executableConnection.WriteInteger(GameYear199703Offset, year1997);
executableConnection.WriteInteger(GameYear199704Offset, year1997);
executableConnection.WriteInteger(GameYear199705Offset, year1997);
executableConnection.WriteInteger(GameYear199706Offset, year1997);
executableConnection.WriteInteger(GameYear199707Offset, year1997);
executableConnection.WriteInteger(GameYear199708Offset, year1997);
executableConnection.WriteInteger(GameYear199709Offset, year1997);
executableConnection.WriteInteger(GameYear199710Offset, year1997);
executableConnection.WriteInteger(GameYear199711Offset, year1997);
executableConnection.WriteInteger(GameYear199712Offset, year1997);
executableConnection.WriteInteger(GameYear199713Offset, year1997);
executableConnection.WriteInteger(GameYear199714Offset, year1997);
executableConnection.WriteInteger(GameYear199715Offset, year1997);
executableConnection.WriteInteger(GameYear199716Offset, year1997);
executableConnection.WriteInteger(GameYear199717Offset, year1997);
executableConnection.WriteInteger(GameYear199718Offset, year1997);
executableConnection.WriteInteger(GameYear199719Offset, year1997);
executableConnection.WriteInteger(GameYear199720Offset, year1997);
executableConnection.WriteInteger(GameYear199721Offset, year1997);
executableConnection.WriteInteger(GameYear199722Offset, year1997);
executableConnection.WriteInteger(GameYear199723Offset, year1997);
executableConnection.WriteInteger(GameYear199724Offset, year1997);
executableConnection.WriteInteger(GameYear199725Offset, year1997);
executableConnection.WriteInteger(GameYear199726Offset, year1997);
executableConnection.WriteInteger(GameYear199727Offset, year1997);
executableConnection.WriteInteger(GameYear199728Offset, year1997);
executableConnection.WriteInteger(GameYear199729Offset, year1997);
executableConnection.WriteInteger(GameYear199801Offset, year1998);
executableConnection.WriteInteger(GameYear199802Offset, year1998);
executableConnection.WriteInteger(GameYear199803Offset, year1998);
executableConnection.WriteInteger(GameYear199804Offset, year1998);
executableConnection.WriteInteger(GameYear199805Offset, year1998);
executableConnection.WriteInteger(GameYear199806Offset, year1998);
executableConnection.WriteInteger(GameYear199807Offset, year1998);
executableConnection.WriteInteger(GameYear199808Offset, year1998);
executableConnection.WriteInteger(GameYear199809Offset, year1998);
executableConnection.WriteInteger(GameYear199810Offset, year1998);
executableConnection.WriteInteger(GameYear199811Offset, year1998);
executableConnection.WriteInteger(GameYear199812Offset, year1998);
executableConnection.WriteInteger(GameYear199813Offset, year1998);
executableConnection.WriteInteger(GameYear199814Offset, year1998);
executableConnection.WriteInteger(GameYear199815Offset, year1998);
executableConnection.WriteInteger(GameYear199816Offset, year1998);
executableConnection.WriteInteger(GameYear199817Offset, year1998);
executableConnection.WriteInteger(GameYear199818Offset, year1998);
executableConnection.WriteInteger(GameYear199819Offset, year1998);
executableConnection.WriteInteger(GameYear199820Offset, year1998);
executableConnection.WriteInteger(GameYear199821Offset, year1998);
executableConnection.WriteInteger(GameYear199901Offset, year1999);
executableConnection.WriteInteger(GameYear199902Offset, year1999);
executableConnection.WriteInteger(GameYear200001Offset, firstLeapYear);
executableConnection.WriteInteger(GameYear200002Offset, firstLeapYear);
executableConnection.WriteInteger(GameYear200003Offset, firstLeapYear);
executableConnection.WriteInteger(GameYear200101Offset, yearAfterFirstLeapYear);
executableConnection.WriteInteger(GameYear200401Offset, secondLeapYear);
executableConnection.WriteInteger(GameYear200402Offset, secondLeapYear);
executableConnection.WriteInteger(GameYear200403Offset, secondLeapYear);
executableConnection.WriteInteger(GameYear200501Offset, yearAfterSecondLeapYear);
executableConnection.WriteInteger(GameYear200701Offset, year2007);
executableConnection.WriteInteger(GameYear200702Offset, year2007);
executableConnection.WriteInteger(GameYear200801Offset, thirdLeapYear);
executableConnection.WriteInteger(GameYear201201Offset, fourthLeapYear);
}
}