/**
* Subtracts a time span to the date
*
* Subtracts a time span to the date
*
* @access public
* @param
* object Span $span the time span to subtract
*/
function subtractSpan($span)
{
if (!is_a($span, 'TYPO3\\CMS\\Cal\\Model\\Pear\\Date\\Span')) {
return;
}
if ($span->isEmpty()) {
return;
}
$this->second -= $span->second;
if ($this->second < 0) {
$this->minute--;
$this->second += 60;
}
$this->minute -= $span->minute;
if ($this->minute < 0) {
$this->hour--;
if ($this->hour < 0) {
list($this->year, $this->month, $this->day) = sscanf(Calc::prevDay($this->day, $this->month, $this->year), "%04s%02s%02s");
$this->hour += 24;
}
$this->minute += 60;
}
$this->hour -= $span->hour;
if ($this->hour < 0) {
list($this->year, $this->month, $this->day) = sscanf(Calc::prevDay($this->day, $this->month, $this->year), "%04s%02s%02s");
$this->hour += 24;
}
$d = Calc::dateToDays($this->day, $this->month, $this->year);
$d -= $span->day;
list($this->year, $this->month, $this->day) = sscanf(Calc::daysToDate($d), "%04s%02s%02s");
$this->year = intval($this->year);
$this->month = intval($this->month);
$this->day = intval($this->day);
}
