Classes List

Symfony\Component\Finder\Comparator\NumberComparator

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<?php

/* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */


namespace Symfony\Component\Finder\Comparator;

/** * NumberComparator compiles a simple comparison to an anonymous * subroutine, which you can call with a value to be tested again. * * Now this would be very pointless, if NumberCompare didn't understand * magnitudes. * * The target value may use magnitudes of kilobytes (k, ki), * megabytes (m, mi), or gigabytes (g, gi). Those suffixed * with an i use the appropriate 2**n version in accordance with the * IEC standard: http://physics.nist.gov/cuu/Units/binary.html * * Based on the Perl Number::Compare module. * * @author Fabien Potencier <fabien@symfony.com> PHP port * @author Richard Clamp <richardc@unixbeard.net> Perl version * @copyright 2004-2005 Fabien Potencier <fabien@symfony.com> * @copyright 2002 Richard Clamp <richardc@unixbeard.net> * * @see http://physics.nist.gov/cuu/Units/binary.html */
class NumberComparator extends Comparator
{
    /** * @param string|int $test A comparison string or an integer * * @throws \InvalidArgumentException If the test is not understood */
    public function __construct($test)
    {
        if (!preg_match('#^\s*(==|!=|[<>]=?)?\s*([0-9\.]+)\s*([kmg]i?)?\s*$#i'$test$matches)) {
            throw new \InvalidArgumentException(sprintf('Don\'t understand "%s" as a number test.'$test));
        }

        $target = $matches[2];
        if (!is_numeric($target)) {
            throw new \InvalidArgumentException(sprintf('Invalid number "%s".'$target));
        }
        if (isset($matches[3])) {
            // magnitude
            switch (strtolower($matches[3])) {
                case 'k':
                    $target *= 1000;
                    break;
                case 'ki':
                    $target *= 1024;
                    break;
                case 'm':
                    $target *= 1000000;
                    break;
                case 'mi':
                    $target *= 1024 * 1024;
                    break;
                case 'g':
                    $target *= 1000000000;
                    break;
                case 'gi':
                    $target *= 1024 * 1024 * 1024;
                    break;
            }
        }

        $this->setTarget($target);
        $this->setOperator(isset($matches[1]) ? $matches[1] : '==');
    }
}