public static bool isLastDayOfFebruary(SerialDate d)
{
if (d.getMonth() != 2)
return false;
int dayOfMonth = d.getDayOfMonth();
if (SerialDate.isLeapYear(d.getYYYY()))
return dayOfMonth == 29;
else
return dayOfMonth == 28;
}
public static int dayCount30(SerialDate start, SerialDate end)
{
if (!start.isBefore(end))
return -SerialDateUtilities.dayCount30(end, start);
int dayOfMonth1 = start.getDayOfMonth();
int month1 = start.getMonth();
int yyyy = start.getYYYY();
int dayOfMonth2 = end.getDayOfMonth();
int month2 = end.getMonth();
return 360 * (end.getYYYY() - yyyy) + 30 * (month2 - month1) + (dayOfMonth2 - dayOfMonth1);
}
public static int dayCount30ISDA(SerialDate start, SerialDate end)
{
if (start.isBefore(end))
{
int num1 = start.getDayOfMonth();
int month1 = start.getMonth();
int yyyy1 = start.getYYYY();
if (num1 == 31)
num1 = 30;
int num2 = end.getDayOfMonth();
int month2 = end.getMonth();
int yyyy2 = end.getYYYY();
if (num2 == 31 && num1 == 30)
num2 = 30;
return 360 * (yyyy2 - yyyy1) + 30 * (month2 - month1) + (num2 - num1);
}
else if (start.isAfter(end))
return -SerialDateUtilities.dayCount30ISDA(end, start);
else
return 0;
}
public static int dayCount30PSA(SerialDate start, SerialDate end)
{
if (!start.isOnOrBefore(end))
return -SerialDateUtilities.dayCount30PSA(end, start);
int num1 = start.getDayOfMonth();
int month1 = start.getMonth();
int yyyy1 = start.getYYYY();
if (SerialDateUtilities.isLastDayOfFebruary(start))
num1 = 30;
if (num1 == 31 || SerialDateUtilities.isLastDayOfFebruary(start))
num1 = 30;
int num2 = end.getDayOfMonth();
int month2 = end.getMonth();
int yyyy2 = end.getYYYY();
if (num2 == 31 && num1 == 30)
num2 = 30;
return 360 * (yyyy2 - yyyy1) + 30 * (month2 - month1) + (num2 - num1);
}
