// -----------------------------------------------------------------------
public long getDifferenceAsLong(long minuendInstant, long subtrahendInstant) {
if (minuendInstant < subtrahendInstant) {
return -getDifference(subtrahendInstant, minuendInstant);
}
int minuendYear = iChronology.getYear(minuendInstant);
int minuendMonth = iChronology.getMonthOfYear(minuendInstant, minuendYear);
int subtrahendYear = iChronology.getYear(subtrahendInstant);
int subtrahendMonth = iChronology.getMonthOfYear(subtrahendInstant, subtrahendYear);
long difference =
(minuendYear - subtrahendYear) * ((long) iMax) + minuendMonth - subtrahendMonth;
// Before adjusting for remainder, account for special case of add
// where the day-of-month is forced to the nearest sane value.
int minuendDom = iChronology.getDayOfMonth(minuendInstant, minuendYear, minuendMonth);
if (minuendDom == iChronology.getDaysInYearMonth(minuendYear, minuendMonth)) {
// Last day of the minuend month...
int subtrahendDom =
iChronology.getDayOfMonth(subtrahendInstant, subtrahendYear, subtrahendMonth);
if (subtrahendDom > minuendDom) {
// ...and day of subtrahend month is larger.
// Note: This works fine, but it ideally shouldn't invoke other
// fields from within a field.
subtrahendInstant = iChronology.dayOfMonth().set(subtrahendInstant, minuendDom);
}
}
// Inlined remainder method to avoid duplicate calls.
long minuendRem = minuendInstant - iChronology.getYearMonthMillis(minuendYear, minuendMonth);
long subtrahendRem =
subtrahendInstant - iChronology.getYearMonthMillis(subtrahendYear, subtrahendMonth);
if (minuendRem < subtrahendRem) {
difference--;
}
return difference;
}
// -----------------------------------------------------------------------
public long roundFloor(long instant) {
int year = iChronology.getYear(instant);
int month = iChronology.getMonthOfYear(instant, year);
return iChronology.getYearMonthMillis(year, month);
}
