/**
* Answer the days in this month on a given year.
*
* @param string $indexOrNameString
* @param ingteger $yearInteger
* @return integer
* @access public
* @since 5/5/05
* @static
*/
static function daysInMonthForYear($indexOrNameString, $yearInteger)
{
if (is_numeric($indexOrNameString)) {
$index = $indexOrNameString;
} else {
$index = Month::indexOfMonth($indexOrNameString);
}
if ($index < 1 | $index > 12) {
$errorString = $index . " is not a valid month index.";
if (function_exists('throwError')) {
throwError(new Error($errorString));
} else {
die($errorString);
}
}
$monthDays = ChronologyConstants::DaysInMonth();
$days = $monthDays[$index];
if ($index == 2 && Year::isYearLeapYear($yearInteger)) {
return $days + 1;
} else {
return $days;
}
}
/**
* Return the number of days in a year.
*
* @param integer $anInteger
* @return integer
* @access public
* @since 10/15/08
* @static
*/
public static function getDaysInYear($anInteger)
{
if (is_null($anInteger)) {
throw new InvalidArgumentException("Cannot execute daysInYear for NULL.");
}
if (Year::isYearLeapYear($anInteger)) {
return 365 + 1;
} else {
return 365;
}
}
/**
* Test some leap years.
*
*/
function test_leap_years()
{
// recent leap years
$this->assertTrue(Year::isYearLeapYear(1980));
$this->assertTrue(Year::isYearLeapYear(1984));
$this->assertTrue(Year::isYearLeapYear(1988));
$this->assertTrue(Year::isYearLeapYear(1992));
$this->assertTrue(Year::isYearLeapYear(1996));
$this->assertTrue(Year::isYearLeapYear(2000));
$this->assertTrue(Year::isYearLeapYear(2004));
$this->assertTrue(Year::isYearLeapYear(2008));
// divisible-by 100 years
$this->assertTrue(Year::isYearLeapYear(1600));
$this->assertFalse(Year::isYearLeapYear(1700));
$this->assertFalse(Year::isYearLeapYear(1800));
$this->assertFalse(Year::isYearLeapYear(1900));
$this->assertTrue(Year::isYearLeapYear(2000));
$this->assertFalse(Year::isYearLeapYear(2100));
$this->assertFalse(Year::isYearLeapYear(2200));
$this->assertFalse(Year::isYearLeapYear(2300));
$this->assertTrue(Year::isYearLeapYear(2400));
// Non-leap years
$this->assertFalse(Year::isYearLeapYear(1981));
$this->assertFalse(Year::isYearLeapYear(1979));
$this->assertFalse(Year::isYearLeapYear(1999));
$this->assertFalse(Year::isYearLeapYear(2003));
$this->assertFalse(Year::isYearLeapYear(2001));
$this->assertFalse(Year::isYearLeapYear(1789));
$this->assertFalse(Year::isYearLeapYear(2002));
$this->assertFalse(Year::isYearLeapYear(1998));
$this->assertFalse(Year::isYearLeapYear(2005));
$aYear = Year::starting(DateAndTime::withYearDay(1980, 55));
$this->assertEqual($aYear->startYear(), 1980);
$this->assertEqual($aYear->dayOfYear(), 55);
$this->assertEqual($aYear->daysInYear(), 366);
$aYear = Year::withYear(1980);
$this->assertEqual($aYear->startYear(), 1980);
$this->assertEqual($aYear->dayOfYear(), 1);
$this->assertEqual($aYear->daysInYear(), 366);
$aYear = Year::withYear(2000);
$this->assertEqual($aYear->startYear(), 2000);
$this->assertEqual($aYear->dayOfYear(), 1);
$this->assertEqual($aYear->daysInYear(), 366);
}
/**
* Return if this year is a leap year
*
* @return boolean
* @access public
* @since 5/4/05
*/
function isLeapYear()
{
return Year::isYearLeapYear($this->year());
}
