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