/**
* Round a number to the nearest int, ( 1.2 > 1 && 1.8 > 2)
* @param size_t precision the rounding prescision
* @return BigNumber this number rounded to 'x' precision.
*/
public function Round($precision = 0)
{
// if it is not a number than there is no rounding to do.
if ($this->IsNan()) {
return $this;
}
if ($this->IsNeg()) {
$this->_neg = false;
$this->Round($precision);
$this->_neg = true;
// already cleaned up.
return $this;
}
// add 0.5 and floor(...) it.
$number = new BigNumber(5);
$number->DivideByBase($precision + 1);
$x = static::AbsAdd($number, $this);
$this->_Copy($x->Floor($precision));
// clean up.
return $this->PerformPostOperations($precision);
}