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120 | office | 1 | <?php |
2 | |||
3 | /* |
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4 | * This file is part of the Symfony package. |
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5 | * |
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6 | * (c) Fabien Potencier <fabien@symfony.com> |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |||
12 | namespace Symfony\Component\Finder\Comparator; |
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13 | |||
14 | /** |
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15 | * NumberComparator compiles a simple comparison to an anonymous |
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16 | * subroutine, which you can call with a value to be tested again. |
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17 | * |
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18 | * Now this would be very pointless, if NumberCompare didn't understand |
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19 | * magnitudes. |
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20 | * |
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21 | * The target value may use magnitudes of kilobytes (k, ki), |
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22 | * megabytes (m, mi), or gigabytes (g, gi). Those suffixed |
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23 | * with an i use the appropriate 2**n version in accordance with the |
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24 | * IEC standard: http://physics.nist.gov/cuu/Units/binary.html |
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25 | * |
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26 | * Based on the Perl Number::Compare module. |
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27 | * |
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28 | * @author Fabien Potencier <fabien@symfony.com> PHP port |
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29 | * @author Richard Clamp <richardc@unixbeard.net> Perl version |
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30 | * @copyright 2004-2005 Fabien Potencier <fabien@symfony.com> |
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31 | * @copyright 2002 Richard Clamp <richardc@unixbeard.net> |
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32 | * |
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33 | * @see http://physics.nist.gov/cuu/Units/binary.html |
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34 | */ |
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35 | class NumberComparator extends Comparator |
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36 | { |
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37 | /** |
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38 | * Constructor. |
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39 | * |
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40 | * @param string|int $test A comparison string or an integer |
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41 | * |
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42 | * @throws \InvalidArgumentException If the test is not understood |
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43 | */ |
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44 | public function __construct($test) |
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45 | { |
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46 | if (!preg_match('#^\s*(==|!=|[<>]=?)?\s*([0-9\.]+)\s*([kmg]i?)?\s*$#i', $test, $matches)) { |
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47 | throw new \InvalidArgumentException(sprintf('Don\'t understand "%s" as a number test.', $test)); |
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48 | } |
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49 | |||
50 | $target = $matches[2]; |
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51 | if (!is_numeric($target)) { |
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52 | throw new \InvalidArgumentException(sprintf('Invalid number "%s".', $target)); |
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53 | } |
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54 | if (isset($matches[3])) { |
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55 | // magnitude |
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56 | switch (strtolower($matches[3])) { |
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57 | case 'k': |
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58 | $target *= 1000; |
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59 | break; |
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60 | case 'ki': |
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61 | $target *= 1024; |
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62 | break; |
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63 | case 'm': |
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64 | $target *= 1000000; |
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65 | break; |
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66 | case 'mi': |
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67 | $target *= 1024 * 1024; |
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68 | break; |
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69 | case 'g': |
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70 | $target *= 1000000000; |
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71 | break; |
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72 | case 'gi': |
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73 | $target *= 1024 * 1024 * 1024; |
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74 | break; |
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75 | } |
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76 | } |
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77 | |||
78 | $this->setTarget($target); |
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79 | $this->setOperator(isset($matches[1]) ? $matches[1] : '=='); |
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80 | } |
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81 | } |