/*static*/
int DateUtilities::GetDayMinAndUpdateYear(int day, int &year)
{
int dayMin = (int)DayFromYear(year);
if (day < dayMin)
{
year--;
dayMin = (int)DayFromYear(year);
}
return dayMin;
}
///------------------------------------------------------------------------------
/// Get a time value from (year, mon, day, time) values.
///------------------------------------------------------------------------------
double
DateUtilities::TvFromDate(double year, double mon, double day, double time)
{
// For positive month, use fast path: '/' and '%' rather than 'floor()' and 'fmod()'.
// But make sure there is no overflow when casting double -> int -- WOOB 1142298.
if (mon >= 0 && mon <= INT_MAX)
{
year += ((int)mon) / 12;
mon = ((int)mon) % 12;
}
else
{
year += floor(mon/12);
mon = DblModPos(mon,12);
}
day += DayFromYear(year);
AssertMsg(mon >= 0 && mon <= 11, "'mon' must be in the range of [0..11].");
day += g_rgday[(int)mon];
if (mon >= 2 && !FLeap((int)year))
{
day -= 1;
}
return day * 86400000 + time;
}
static double DayFromMonth(double year, double month)
{
int iMonth = (int) MathUtils::floor(month);
if (iMonth < 0 || iMonth >= 12) {
return MathUtils::kNaN;
}
return DayFromYear((int)year) + kMonthOffset[(int)IsLeapYear((int)year)][iMonth];
}
