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Diffstat (limited to 'vendor/symfony/translation/Symfony/Component/Translation/Interval.php')
-rw-r--r-- | vendor/symfony/translation/Symfony/Component/Translation/Interval.php | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/vendor/symfony/translation/Symfony/Component/Translation/Interval.php b/vendor/symfony/translation/Symfony/Component/Translation/Interval.php new file mode 100644 index 00000000..033b0188 --- /dev/null +++ b/vendor/symfony/translation/Symfony/Component/Translation/Interval.php | |||
@@ -0,0 +1,107 @@ | |||
1 | <?php | ||
2 | |||
3 | /* | ||
4 | * This file is part of the Symfony package. | ||
5 | * | ||
6 | * (c) Fabien Potencier <fabien@symfony.com> | ||
7 | * | ||
8 | * For the full copyright and license information, please view the LICENSE | ||
9 | * file that was distributed with this source code. | ||
10 | */ | ||
11 | |||
12 | namespace Symfony\Component\Translation; | ||
13 | |||
14 | /** | ||
15 | * Tests if a given number belongs to a given math interval. | ||
16 | * | ||
17 | * An interval can represent a finite set of numbers: | ||
18 | * | ||
19 | * {1,2,3,4} | ||
20 | * | ||
21 | * An interval can represent numbers between two numbers: | ||
22 | * | ||
23 | * [1, +Inf] | ||
24 | * ]-1,2[ | ||
25 | * | ||
26 | * The left delimiter can be [ (inclusive) or ] (exclusive). | ||
27 | * The right delimiter can be [ (exclusive) or ] (inclusive). | ||
28 | * Beside numbers, you can use -Inf and +Inf for the infinite. | ||
29 | * | ||
30 | * @author Fabien Potencier <fabien@symfony.com> | ||
31 | * | ||
32 | * @see http://en.wikipedia.org/wiki/Interval_%28mathematics%29#The_ISO_notation | ||
33 | */ | ||
34 | class Interval | ||
35 | { | ||
36 | /** | ||
37 | * Tests if the given number is in the math interval. | ||
38 | * | ||
39 | * @param integer $number A number | ||
40 | * @param string $interval An interval | ||
41 | * | ||
42 | * @return Boolean | ||
43 | * | ||
44 | * @throws \InvalidArgumentException | ||
45 | */ | ||
46 | public static function test($number, $interval) | ||
47 | { | ||
48 | $interval = trim($interval); | ||
49 | |||
50 | if (!preg_match('/^'.self::getIntervalRegexp().'$/x', $interval, $matches)) { | ||
51 | throw new \InvalidArgumentException(sprintf('"%s" is not a valid interval.', $interval)); | ||
52 | } | ||
53 | |||
54 | if ($matches[1]) { | ||
55 | foreach (explode(',', $matches[2]) as $n) { | ||
56 | if ($number == $n) { | ||
57 | return true; | ||
58 | } | ||
59 | } | ||
60 | } else { | ||
61 | $leftNumber = self::convertNumber($matches['left']); | ||
62 | $rightNumber = self::convertNumber($matches['right']); | ||
63 | |||
64 | return | ||
65 | ('[' === $matches['left_delimiter'] ? $number >= $leftNumber : $number > $leftNumber) | ||
66 | && (']' === $matches['right_delimiter'] ? $number <= $rightNumber : $number < $rightNumber) | ||
67 | ; | ||
68 | } | ||
69 | |||
70 | return false; | ||
71 | } | ||
72 | |||
73 | /** | ||
74 | * Returns a Regexp that matches valid intervals. | ||
75 | * | ||
76 | * @return string A Regexp (without the delimiters) | ||
77 | */ | ||
78 | public static function getIntervalRegexp() | ||
79 | { | ||
80 | return <<<EOF | ||
81 | ({\s* | ||
82 | (\-?\d+(\.\d+)?[\s*,\s*\-?\d+(\.\d+)?]*) | ||
83 | \s*}) | ||
84 | |||
85 | | | ||
86 | |||
87 | (?P<left_delimiter>[\[\]]) | ||
88 | \s* | ||
89 | (?P<left>-Inf|\-?\d+(\.\d+)?) | ||
90 | \s*,\s* | ||
91 | (?P<right>\+?Inf|\-?\d+(\.\d+)?) | ||
92 | \s* | ||
93 | (?P<right_delimiter>[\[\]]) | ||
94 | EOF; | ||
95 | } | ||
96 | |||
97 | private static function convertNumber($number) | ||
98 | { | ||
99 | if ('-Inf' === $number) { | ||
100 | return log(0); | ||
101 | } elseif ('+Inf' === $number || 'Inf' === $number) { | ||
102 | return -log(0); | ||
103 | } | ||
104 | |||
105 | return (float) $number; | ||
106 | } | ||
107 | } | ||