/// <summary>
/// Shift a date by a given number of months
/// </summary>
/// <param name="dateInYear">Original date value</param>
/// <param name="months">Months to increment by</param>
private static void MonthShift(ref DMY dateInYear, int months)
{
int totalMonths;
if ((dateInYear.Y != 0) && (dateInYear.M != 0))
{
totalMonths = 12 * dateInYear.Y + dateInYear.M + months - 13; // Months from 1 Jan 0001
dateInYear.Y = 1 + totalMonths / 12;
dateInYear.M = 1 + totalMonths % 12;
}
else if (dateInYear.Y != 0)
{
dateInYear.Y += months / 12;
}
else if (dateInYear.M != 0)
{
dateInYear.M = 1 + (dateInYear.M + months - 12 * (months / 12) + 11) % 12;
}
}
/// <summary>
/// Shift a date by a given number of months
/// </summary>
/// <param name="aDate">Original date value</param>
/// <param name="Months">Months to increment by</param>
static private void MonthShift(ref DMY aDate, int Months)
{
int TotalMonths;
if ((aDate.Y != 0) && (aDate.M != 0))
{
TotalMonths = 12 * aDate.Y + aDate.M + Months - 13; // Months from 1 Jan 0001
aDate.Y = 1 + TotalMonths / 12;
aDate.M = 1 + TotalMonths % 12;
}
else if (aDate.Y != 0)
{
aDate.Y += Months / 12;
}
else if (aDate.M != 0)
{
aDate.M = 1 + (aDate.M + Months - 12 * (Months / 12) + 11) % 12;
}
}
/// <summary>
/// Shift a date by a given number of months
/// </summary>
/// <param name="aDate">Original date value</param>
/// <param name="Months">Months to increment by</param>
private static void MonthShift(ref DMY aDate, int Months)
{
int TotalMonths;
if ((aDate.Y != 0) && (aDate.M != 0))
{
TotalMonths = 12 * aDate.Y + aDate.M + Months - 13; // Months from 1 Jan 0001
aDate.Y = 1 + TotalMonths / 12;
aDate.M = 1 + TotalMonths % 12;
}
else if (aDate.Y != 0)
aDate.Y += Months / 12;
else if (aDate.M != 0)
aDate.M = 1 + (aDate.M + Months - 12 * (Months / 12) + 11) % 12;
}
