/**
* Answer the number of hours the receiver represents.
*
* @return integer
* @access public
* @since 5/3/05
*/
function hours()
{
// Above 2^31 seconds, (amost exactly 100 years), PHP converts the
// variable from an integer to a float to allow it to grow larger.
// While addition and subraction work fine with floats, float modulos
// and divisions loose precision. This precision loss does not affect
// the proper value of days up to the maximum duration tested, 50billion
// years.
if (abs($this->seconds) > pow(2, 31)) {
$remainderDuration = $this->minus(Duration::withDays($this->days()));
return $remainderDuration->hours();
} else {
if (!$this->isNegative()) {
return floor($this->seconds % ChronologyConstants::SecondsInDay() / ChronologyConstants::SecondsInHour());
} else {
return 0 - floor(abs($this->seconds) % ChronologyConstants::SecondsInDay() / ChronologyConstants::SecondsInHour());
}
}
}
/**
* Answer a Time from midnight
*
* @param integer $anIntSeconds
* @param optional string $class DO NOT USE OUTSIDE OF PACKAGE.
* This parameter is used to get around the limitations of not being
* able to find the class of the object that recieved the initial
* method call.
* @return object Time
* @access public
* @static
* @since 5/5/05
*/
static function withSeconds($anIntSeconds, $class = 'Time')
{
// Lop off any seconds beyond those in a day
$duration = Duration::withSeconds($anIntSeconds);
$ticks = $duration->ticks();
$seconds = $ticks[1];
// Make sure that we have a positive time since midnight
if ($seconds < 0) {
$seconds = ChronologyConstants::SecondsInDay() + $seconds;
}
// Validate our passed class name.
if (!(strtolower($class) == strtolower('Time') || is_subclass_of(new $class(), 'Time'))) {
die("Class, '{$class}', is not a subclass of 'Time'.");
}
$time = new $class();
$time->setSeconds($seconds);
return $time;
}
/**
* Subtract a Duration or DateAndTime.
*
* @param object $operand
* @return object
* @access public
* @since 5/3/05
*/
function minus($operand)
{
$methods = get_class_methods($operand);
// If this conforms to the DateAndTimeProtocal
if (in_array('asdateandtime', $methods) | in_array('asDateAndTime', $methods)) {
$meLocal = $this->asLocal();
$lticks = $meLocal->ticks();
$opDAndT = $operand->asDateAndTime();
$opLocal = $opDAndT->asLocal();
$rticks = $opLocal->ticks();
$obj = Duration::withSeconds(($lticks[0] - $rticks[0]) * ChronologyConstants::SecondsInDay() + ($lticks[1] - $rticks[1]));
return $obj;
} else {
$obj = $this->plus($operand->negated());
return $obj;
}
}
