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Edit File : Interval.php \| Size : 3.02 KB
<?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\Translation; @trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.2, use IdentityTranslator instead.', Interval::class), \E_USER_DEPRECATED); use Symfony\Component\Translation\Exception\InvalidArgumentException; /* * Tests if a given number belongs to a given math interval. * * An interval can represent a finite set of numbers: * * {1,2,3,4} * * An interval can represent numbers between two numbers: * * [1, +Inf] * ]-1,2[ * * The left delimiter can be [ (inclusive) or ] (exclusive). * The right delimiter can be [ (exclusive) or ] (inclusive). * Beside numbers, you can use -Inf and +Inf for the infinite. * * @author Fabien Potencier <fabien@symfony.com> * * @see http://en.wikipedia.org/wiki/Interval_%28mathematics%29#The_ISO_notation * @deprecated since Symfony 4.2, use IdentityTranslator instead / class Interval { /* * Tests if the given number is in the math interval. * * @param int $number A number * @param string $interval An interval * * @return bool * * @throws InvalidArgumentException / public static function test($number, $interval) { $interval = trim($interval); if (!preg_match('/^'.self::getIntervalRegexp().'$/x', $interval, $matches)) { throw new InvalidArgumentException(sprintf('"%s" is not a valid interval.', $interval)); } if ($matches[1]) { foreach (explode(',', $matches[2]) as $n) { if ($number == $n) { return true; } } } else { $leftNumber = self::convertNumber($matches['left']); $rightNumber = self::convertNumber($matches['right']); return ('[' === $matches['left_delimiter'] ? $number >= $leftNumber : $number > $leftNumber) && (']' === $matches['right_delimiter'] ? $number <= $rightNumber : $number < $rightNumber) ; } return false; } /* * Returns a Regexp that matches valid intervals. * * @return string A Regexp (without the delimiters) / public static function getIntervalRegexp() { return <<<EOF ({\s (\-?\d+(\.\d+)?[\s,\s\-?\d+(\.\d+)?]) \s}) \| (?P<left_delimiter>[\[\]]) \s* (?P<left>-Inf\|\-?\d+(\.\d+)?) \s,\s (?P<right>\+?Inf\|\-?\d+(\.\d+)?) \s* (?P<right_delimiter>[\[\]]) EOF; } private static function convertNumber(string $number): float { if ('-Inf' === $number) { return log(0); } elseif ('+Inf' === $number \|\| 'Inf' === $number) { return -log(0); } return (float) $number; } } Back

Edit File : Interval.php | Size : 3.02 KB

<?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\Translation;

@trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.2, use IdentityTranslator instead.', Interval::class), \E_USER_DEPRECATED);

use Symfony\Component\Translation\Exception\InvalidArgumentException;

/**
 * Tests if a given number belongs to a given math interval.
 *
 * An interval can represent a finite set of numbers:
 *
 *  {1,2,3,4}
 *
 * An interval can represent numbers between two numbers:
 *
 *  [1, +Inf]
 *  ]-1,2[
 *
 * The left delimiter can be [ (inclusive) or ] (exclusive).
 * The right delimiter can be [ (exclusive) or ] (inclusive).
 * Beside numbers, you can use -Inf and +Inf for the infinite.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * @see    http://en.wikipedia.org/wiki/Interval_%28mathematics%29#The_ISO_notation
 * @deprecated since Symfony 4.2, use IdentityTranslator instead
 */
class Interval
{
    /**
     * Tests if the given number is in the math interval.
     *
     * @param int    $number   A number
     * @param string $interval An interval
     *
     * @return bool
     *
     * @throws InvalidArgumentException
     */
    public static function test($number, $interval)
    {
        $interval = trim($interval);

if (!preg_match('/^'.self::getIntervalRegexp().'$/x', $interval, $matches)) {
            throw new InvalidArgumentException(sprintf('"%s" is not a valid interval.', $interval));
        }

if ($matches[1]) {
            foreach (explode(',', $matches[2]) as $n) {
                if ($number == $n) {
                    return true;
                }
            }
        } else {
            $leftNumber = self::convertNumber($matches['left']);
            $rightNumber = self::convertNumber($matches['right']);

return
                ('[' === $matches['left_delimiter'] ? $number >= $leftNumber : $number > $leftNumber)
                && (']' === $matches['right_delimiter'] ? $number <= $rightNumber : $number < $rightNumber)
            ;
        }

return false;
    }

/**
     * Returns a Regexp that matches valid intervals.
     *
     * @return string A Regexp (without the delimiters)
     */
    public static function getIntervalRegexp()
    {
        return <<<EOF
        ({\s*
            (\-?\d+(\.\d+)?[\s*,\s*\-?\d+(\.\d+)?]*)
        \s*})

(?P<left_delimiter>[\[\]])
            \s*
            (?P<left>-Inf|\-?\d+(\.\d+)?)
            \s*,\s*
            (?P<right>\+?Inf|\-?\d+(\.\d+)?)
            \s*
        (?P<right_delimiter>[\[\]])
EOF;
    }

private static function convertNumber(string $number): float
    {
        if ('-Inf' === $number) {
            return log(0);
        } elseif ('+Inf' === $number || 'Inf' === $number) {
            return -log(0);
        }

return (float) $number;
    }
}

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