| public static weekdayInMonth ( int year, int mon, int weekday, int pos ) : int | ||
| year | int | |
| mon | int | |
| weekday | int | |
| pos | int | |
| return | int | |
/// <summary>
/// Compare on day.
/// 'd' 5 the fifth of the month
/// 'l' lastSun the last Sunday in the month
/// 'l' lastMon the last Monday in the month
/// '>' Sun>=8 first Sunday on or after the eighth
/// '<' Sun<=25 last Sunday on or before the 25th (not used)
/// </summary>
static int compareOnDay(Rule rule, DstTime x, int year, int mon, int day)
{
// universal atTime might push us into the previous day
if (x.atMode == 'u' && rule.offset + x.atTime < 0)
{
++day;
}
switch (x.onMode)
{
case (byte)'d':
if (x.onDay < day)
{
return(-1);
}
if (x.onDay > day)
{
return(+1);
}
return(0);
case (byte)'l':
int last = DateTime.weekdayInMonth(year, mon, x.onWeekday, -1);
if (last < day)
{
return(-1);
}
if (last > day)
{
return(+1);
}
return(0);
case (byte)'>':
int start = DateTime.weekdayInMonth(year, mon, x.onWeekday, 1);
while (start < x.onDay)
{
start += 7;
}
if (start < day)
{
return(-1);
}
if (start > day)
{
return(+1);
}
return(0);
default:
throw new Exception("" + (char)x.onMode);
}
}
