Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Finder\Comparator;
Chris@0: 
Chris@0: /**
Chris@0:  * NumberComparator compiles a simple comparison to an anonymous
Chris@0:  * subroutine, which you can call with a value to be tested again.
Chris@0:  *
Chris@0:  * Now this would be very pointless, if NumberCompare didn't understand
Chris@0:  * magnitudes.
Chris@0:  *
Chris@0:  * The target value may use magnitudes of kilobytes (k, ki),
Chris@0:  * megabytes (m, mi), or gigabytes (g, gi).  Those suffixed
Chris@0:  * with an i use the appropriate 2**n version in accordance with the
Chris@0:  * IEC standard: http://physics.nist.gov/cuu/Units/binary.html
Chris@0:  *
Chris@0:  * Based on the Perl Number::Compare module.
Chris@0:  *
Chris@0:  * @author    Fabien Potencier <fabien@symfony.com> PHP port
Chris@0:  * @author    Richard Clamp <richardc@unixbeard.net> Perl version
Chris@0:  * @copyright 2004-2005 Fabien Potencier <fabien@symfony.com>
Chris@0:  * @copyright 2002 Richard Clamp <richardc@unixbeard.net>
Chris@0:  *
Chris@0:  * @see http://physics.nist.gov/cuu/Units/binary.html
Chris@0:  */
Chris@0: class NumberComparator extends Comparator
Chris@0: {
Chris@0:     /**
Chris@0:      * @param string|int $test A comparison string or an integer
Chris@0:      *
Chris@0:      * @throws \InvalidArgumentException If the test is not understood
Chris@0:      */
Chris@0:     public function __construct($test)
Chris@0:     {
Chris@0:         if (!preg_match('#^\s*(==|!=|[<>]=?)?\s*([0-9\.]+)\s*([kmg]i?)?\s*$#i', $test, $matches)) {
Chris@0:             throw new \InvalidArgumentException(sprintf('Don\'t understand "%s" as a number test.', $test));
Chris@0:         }
Chris@0: 
Chris@0:         $target = $matches[2];
Chris@0:         if (!is_numeric($target)) {
Chris@0:             throw new \InvalidArgumentException(sprintf('Invalid number "%s".', $target));
Chris@0:         }
Chris@0:         if (isset($matches[3])) {
Chris@0:             // magnitude
Chris@0:             switch (strtolower($matches[3])) {
Chris@0:                 case 'k':
Chris@0:                     $target *= 1000;
Chris@0:                     break;
Chris@0:                 case 'ki':
Chris@0:                     $target *= 1024;
Chris@0:                     break;
Chris@0:                 case 'm':
Chris@0:                     $target *= 1000000;
Chris@0:                     break;
Chris@0:                 case 'mi':
Chris@0:                     $target *= 1024 * 1024;
Chris@0:                     break;
Chris@0:                 case 'g':
Chris@0:                     $target *= 1000000000;
Chris@0:                     break;
Chris@0:                 case 'gi':
Chris@0:                     $target *= 1024 * 1024 * 1024;
Chris@0:                     break;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         $this->setTarget($target);
Chris@0:         $this->setOperator(isset($matches[1]) ? $matches[1] : '==');
Chris@0:     }
Chris@0: }