/**
* Compute the julian day number of the given year.
*
* @param bool If true, using Gregorian calendar, otherwise using
* Julian calendar.
* @param int The given year.
* @param bool True if the year is a leap year.
*
* @return double
*
* @author Dominik del Bondio <*****@*****.**>
* @author The ICU Project
* @since 0.11.0
*/
private static function computeJulianDayOfYear($isGregorian, $year, &$isLeap)
{
$isLeap = $year % 4 == 0;
$y = $year - 1;
$julianDay = 365.0 * $y + floor($y / 4) + (AgaviDateDefinitions::JAN_1_1_JULIAN_DAY - 3);
if ($isGregorian) {
$isLeap = $isLeap && ($year % 100 != 0 || $year % 400 == 0);
// Add 2 because Gregorian calendar starts 2 days after Julian calendar
$julianDay += AgaviCalendarGrego::gregorianShift($year);
}
return $julianDay;
}
