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<?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\Intl\Util;
/**
* Facilitates the comparison of ICU version strings.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class IcuVersion
{
/**
* Compares two ICU versions with an operator.
*
* This method is identical to {@link version_compare()}, except that you
* can pass the number of regarded version components in the last argument
* $precision.
*
* Also, a single digit release version and a single digit major version
* are contracted to a two digit release version. If no major version
* is given, it is substituted by zero.
*
* Examples:
*
* IcuVersion::compare('1.2.3', '1.2.4', '==')
* // => false
*
* IcuVersion::compare('1.2.3', '1.2.4', '==', 2)
* // => true
*
* IcuVersion::compare('1.2.3', '12.3', '==')
* // => true
*
* IcuVersion::compare('1', '10', '==')
* // => true
*
* @param string $version1 A version string.
* @param string $version2 A version string to compare.
* @param string $operator The comparison operator.
* @param integer|null $precision The number of components to compare. Pass
* NULL to compare the versions unchanged.
*
* @return Boolean Whether the comparison succeeded.
*
* @see normalize()
*/
public static function compare($version1, $version2, $operator, $precision = null)
{
$version1 = self::normalize($version1, $precision);
$version2 = self::normalize($version2, $precision);
return version_compare($version1, $version2, $operator);
}
/**
* Normalizes a version string to the number of components given in the
* parameter $precision.
*
* A single digit release version and a single digit major version are
* contracted to a two digit release version. If no major version is given,
* it is substituted by zero.
*
* Examples:
*
* IcuVersion::normalize('1.2.3.4');
* // => '12.3.4'
*
* IcuVersion::normalize('1.2.3.4', 1);
* // => '12'
*
* IcuVersion::normalize('1.2.3.4', 2);
* // => '12.3'
*
* @param string $version An ICU version string.
* @param integer|null $precision The number of components to include. Pass
* NULL to return the version unchanged.
*
* @return string|null The normalized ICU version or NULL if it couldn't be
* normalized.
*/
public static function normalize($version, $precision)
{
$version = preg_replace('/^(\d)\.(\d)/', '$1$2', $version);
if (1 === strlen($version)) {
$version .= '0';
}
return Version::normalize($version, $precision);
}
/**
* Must not be instantiated.
*/
private function __construct() {}
}
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