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95 lines
2.8 KiB
95 lines
2.8 KiB
1 year ago
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<?php
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/*
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* This file is part of composer/semver.
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*
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* (c) Composer <https://github.com/composer>
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*
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* For the full copyright and license information, please view
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* the LICENSE file that was distributed with this source code.
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*/
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namespace Composer\Semver;
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use Composer\Semver\Constraint\Constraint;
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use Composer\Semver\Constraint\ConstraintInterface;
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/**
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* Helper class to evaluate constraint by compiling and reusing the code to evaluate
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*/
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class CompilingMatcher
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{
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/**
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* @var array
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* @phpstan-var array<string, callable>
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*/
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private static $compiledCheckerCache = array();
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/**
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* @var array
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* @phpstan-var array<string, bool>
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*/
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private static $resultCache = array();
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/** @var bool */
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private static $enabled;
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/**
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* @phpstan-var array<Constraint::OP_*, Constraint::STR_OP_*>
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*/
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private static $transOpInt = array(
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Constraint::OP_EQ => Constraint::STR_OP_EQ,
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Constraint::OP_LT => Constraint::STR_OP_LT,
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Constraint::OP_LE => Constraint::STR_OP_LE,
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Constraint::OP_GT => Constraint::STR_OP_GT,
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Constraint::OP_GE => Constraint::STR_OP_GE,
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Constraint::OP_NE => Constraint::STR_OP_NE,
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);
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/**
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* Clears the memoization cache once you are done
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*
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* @return void
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*/
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public static function clear()
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{
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self::$resultCache = array();
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self::$compiledCheckerCache = array();
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}
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/**
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* Evaluates the expression: $constraint match $operator $version
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*
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* @param ConstraintInterface $constraint
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* @param int $operator
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* @phpstan-param Constraint::OP_* $operator
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* @param string $version
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*
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* @return mixed
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*/
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public static function match(ConstraintInterface $constraint, $operator, $version)
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{
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$resultCacheKey = $operator.$constraint.';'.$version;
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if (isset(self::$resultCache[$resultCacheKey])) {
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return self::$resultCache[$resultCacheKey];
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}
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if (self::$enabled === null) {
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self::$enabled = !\in_array('eval', explode(',', (string) ini_get('disable_functions')), true);
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}
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if (!self::$enabled) {
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return self::$resultCache[$resultCacheKey] = $constraint->matches(new Constraint(self::$transOpInt[$operator], $version));
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}
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$cacheKey = $operator.$constraint;
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if (!isset(self::$compiledCheckerCache[$cacheKey])) {
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$code = $constraint->compile($operator);
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self::$compiledCheckerCache[$cacheKey] = $function = eval('return function($v, $b){return '.$code.';};');
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} else {
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$function = self::$compiledCheckerCache[$cacheKey];
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}
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return self::$resultCache[$resultCacheKey] = $function($version, strpos($version, 'dev-') === 0);
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}
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}
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