mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-29 23:46:21 +00:00
79 lines
2.5 KiB
PHP
79 lines
2.5 KiB
PHP
|
<?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(?string $test)
|
||
|
|
{
|
||
|
|
if (null === $test || !preg_match('#^\s*(==|!=|[<>]=?)?\s*([0-9\.]+)\s*([kmg]i?)?\s*$#i', $test, $matches)) {
|
||
|
|
throw new \InvalidArgumentException(sprintf('Don\'t understand "%s" as a number test.', $test ?? 'null'));
|
||
|
|
}
|
||
|
|
|
||
|
|
$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':
|
||
|
|
$target *= 1024 * 1024 * 1024;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
parent::__construct($target, $matches[1] ?: '==');
|
||
|
|
}
|
||
|
|
}
|