| public getSigFigs ( string $n ) : integer | ||
| $n | string | Decimal number |
| return | integer | number of sigfigs |
public function getSigFigs($n)
{
$n = ltrim($n, '0+-');
$dp = strpos($n, '.');
// decimal position
if ($dp === false) {
$sigfigs = strlen(rtrim($n, '0'));
} else {
$sigfigs = strlen(ltrim($n, '0.'));
// eliminate extra decimal character
if ($dp !== 0) {
$sigfigs--;
}
}
return $sigfigs;
} protected function assertSigFig($n, $sigfigs)
{
$converter = new HTMLPurifier_UnitConverter();
$result = $converter->getSigFigs($n);
$this->assertIdentical($result, $sigfigs);
}
