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Diffstat (limited to 'example/vendor/composer/ClassLoader.php')
| -rw-r--r-- | example/vendor/composer/ClassLoader.php | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/example/vendor/composer/ClassLoader.php b/example/vendor/composer/ClassLoader.php new file mode 100644 index 0000000..247294d --- /dev/null +++ b/example/vendor/composer/ClassLoader.php @@ -0,0 +1,479 @@ +<?php + +/* + * This file is part of Composer. + * + * (c) Nils Adermann <naderman@naderman.de> + * Jordi Boggiano <j.boggiano@seld.be> + * + * For the full copyright and license information, please view the LICENSE + * file that was distributed with this source code. + */ + +namespace Composer\Autoload; + +/** + * ClassLoader implements a PSR-0, PSR-4 and classmap class loader. + * + * $loader = new \Composer\Autoload\ClassLoader(); + * + * // register classes with namespaces + * $loader->add('Symfony\Component', __DIR__.'/component'); + * $loader->add('Symfony', __DIR__.'/framework'); + * + * // activate the autoloader + * $loader->register(); + * + * // to enable searching the include path (eg. for PEAR packages) + * $loader->setUseIncludePath(true); + * + * In this example, if you try to use a class in the Symfony\Component + * namespace or one of its children (Symfony\Component\Console for instance), + * the autoloader will first look for the class under the component/ + * directory, and it will then fallback to the framework/ directory if not + * found before giving up. + * + * This class is loosely based on the Symfony UniversalClassLoader. + * + * @author Fabien Potencier <fabien@symfony.com> + * @author Jordi Boggiano <j.boggiano@seld.be> + * @see https://www.php-fig.org/psr/psr-0/ + * @see https://www.php-fig.org/psr/psr-4/ + */ +class ClassLoader +{ + private $vendorDir; + + // PSR-4 + private $prefixLengthsPsr4 = array(); + private $prefixDirsPsr4 = array(); + private $fallbackDirsPsr4 = array(); + + // PSR-0 + private $prefixesPsr0 = array(); + private $fallbackDirsPsr0 = array(); + + private $useIncludePath = false; + private $classMap = array(); + private $classMapAuthoritative = false; + private $missingClasses = array(); + private $apcuPrefix; + + private static $registeredLoaders = array(); + + public function __construct($vendorDir = null) + { + $this->vendorDir = $vendorDir; + } + + public function getPrefixes() + { + if (!empty($this->prefixesPsr0)) { + return call_user_func_array('array_merge', array_values($this->prefixesPsr0)); + } + + return array(); + } + + public function getPrefixesPsr4() + { + return $this->prefixDirsPsr4; + } + + public function getFallbackDirs() + { + return $this->fallbackDirsPsr0; + } + + public function getFallbackDirsPsr4() + { + return $this->fallbackDirsPsr4; + } + + public function getClassMap() + { + return $this->classMap; + } + + /** + * @param array $classMap Class to filename map + */ + public function addClassMap(array $classMap) + { + if ($this->classMap) { + $this->classMap = array_merge($this->classMap, $classMap); + } else { + $this->classMap = $classMap; + } + } + + /** + * Registers a set of PSR-0 directories for a given prefix, either + * appending or prepending to the ones previously set for this prefix. + * + * @param string $prefix The prefix + * @param array|string $paths The PSR-0 root directories + * @param bool $prepend Whether to prepend the directories + */ + public function add($prefix, $paths, $prepend = false) + { + if (!$prefix) { + if ($prepend) { + $this->fallbackDirsPsr0 = array_merge( + (array) $paths, + $this->fallbackDirsPsr0 + ); + } else { + $this->fallbackDirsPsr0 = array_merge( + $this->fallbackDirsPsr0, + (array) $paths + ); + } + + return; + } + + $first = $prefix[0]; + if (!isset($this->prefixesPsr0[$first][$prefix])) { + $this->prefixesPsr0[$first][$prefix] = (array) $paths; + + return; + } + if ($prepend) { + $this->prefixesPsr0[$first][$prefix] = array_merge( + (array) $paths, + $this->prefixesPsr0[$first][$prefix] + ); + } else { + $this->prefixesPsr0[$first][$prefix] = array_merge( + $this->prefixesPsr0[$first][$prefix], + (array) $paths + ); + } + } + + /** + * Registers a set of PSR-4 directories for a given namespace, either + * appending or prepending to the ones previously set for this namespace. + * + * @param string $prefix The prefix/namespace, with trailing '\\' + * @param array|string $paths The PSR-4 base directories + * @param bool $prepend Whether to prepend the directories + * + * @throws \InvalidArgumentException + */ + public function addPsr4($prefix, $paths, $prepend = false) + { + if (!$prefix) { + // Register directories for the root namespace. + if ($prepend) { + $this->fallbackDirsPsr4 = array_merge( + (array) $paths, + $this->fallbackDirsPsr4 + ); + } else { + $this->fallbackDirsPsr4 = array_merge( + $this->fallbackDirsPsr4, + (array) $paths + ); + } + } elseif (!isset($this->prefixDirsPsr4[$prefix])) { + // Register directories for a new namespace. + $length = strlen($prefix); + if ('\\' !== $prefix[$length - 1]) { + throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator."); + } + $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length; + $this->prefixDirsPsr4[$prefix] = (array) $paths; + } elseif ($prepend) { + // Prepend directories for an already registered namespace. + $this->prefixDirsPsr4[$prefix] = array_merge( + (array) $paths, + $this->prefixDirsPsr4[$prefix] + ); + } else { + // Append directories for an already registered namespace. + $this->prefixDirsPsr4[$prefix] = array_merge( + $this->prefixDirsPsr4[$prefix], + (array) $paths + ); + } + } + + /** + * Registers a set of PSR-0 directories for a given prefix, + * replacing any others previously set for this prefix. + * + * @param string $prefix The prefix + * @param array|string $paths The PSR-0 base directories + */ + public function set($prefix, $paths) + { + if (!$prefix) { + $this->fallbackDirsPsr0 = (array) $paths; + } else { + $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths; + } + } + + /** + * Registers a set of PSR-4 directories for a given namespace, + * replacing any others previously set for this namespace. + * + * @param string $prefix The prefix/namespace, with trailing '\\' + * @param array|string $paths The PSR-4 base directories + * + * @throws \InvalidArgumentException + */ + public function setPsr4($prefix, $paths) + { + if (!$prefix) { + $this->fallbackDirsPsr4 = (array) $paths; + } else { + $length = strlen($prefix); + if ('\\' !== $prefix[$length - 1]) { + throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator."); + } + $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length; + $this->prefixDirsPsr4[$prefix] = (array) $paths; + } + } + + /** + * Turns on searching the include path for class files. + * + * @param bool $useIncludePath + */ + public function setUseIncludePath($useIncludePath) + { + $this->useIncludePath = $useIncludePath; + } + + /** + * Can be used to check if the autoloader uses the include path to check + * for classes. + * + * @return bool + */ + public function getUseIncludePath() + { + return $this->useIncludePath; + } + + /** + * Turns off searching the prefix and fallback directories for classes + * that have not been registered with the class map. + * + * @param bool $classMapAuthoritative + */ + public function setClassMapAuthoritative($classMapAuthoritative) + { + $this->classMapAuthoritative = $classMapAuthoritative; + } + + /** + * Should class lookup fail if not found in the current class map? + * + * @return bool + */ + public function isClassMapAuthoritative() + { + return $this->classMapAuthoritative; + } + + /** + * APCu prefix to use to cache found/not-found classes, if the extension is enabled. + * + * @param string|null $apcuPrefix + */ + public function setApcuPrefix($apcuPrefix) + { + $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null; + } + + /** + * The APCu prefix in use, or null if APCu caching is not enabled. + * + * @return string|null + */ + public function getApcuPrefix() + { + return $this->apcuPrefix; + } + + /** + * Registers this instance as an autoloader. + * + * @param bool $prepend Whether to prepend the autoloader or not + */ + public function register($prepend = false) + { + spl_autoload_register(array($this, 'loadClass'), true, $prepend); + + if (null === $this->vendorDir) { + return; + } + + if ($prepend) { + self::$registeredLoaders = array($this->vendorDir => $this) + self::$registeredLoaders; + } else { + unset(self::$registeredLoaders[$this->vendorDir]); + self::$registeredLoaders[$this->vendorDir] = $this; + } + } + + /** + * Unregisters this instance as an autoloader. + */ + public function unregister() + { + spl_autoload_unregister(array($this, 'loadClass')); + + if (null !== $this->vendorDir) { + unset(self::$registeredLoaders[$this->vendorDir]); + } + } + + /** + * Loads the given class or interface. + * + * @param string $class The name of the class + * @return bool|null True if loaded, null otherwise + */ + public function loadClass($class) + { + if ($file = $this->findFile($class)) { + includeFile($file); + + return true; + } + } + + /** + * Finds the path to the file where the class is defined. + * + * @param string $class The name of the class + * + * @return string|false The path if found, false otherwise + */ + public function findFile($class) + { + // class map lookup + if (isset($this->classMap[$class])) { + return $this->classMap[$class]; + } + if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) { + return false; + } + if (null !== $this->apcuPrefix) { + $file = apcu_fetch($this->apcuPrefix.$class, $hit); + if ($hit) { + return $file; + } + } + + $file = $this->findFileWithExtension($class, '.php'); + + // Search for Hack files if we are running on HHVM + if (false === $file && defined('HHVM_VERSION')) { + $file = $this->findFileWithExtension($class, '.hh'); + } + + if (null !== $this->apcuPrefix) { + apcu_add($this->apcuPrefix.$class, $file); + } + + if (false === $file) { + // Remember that this class does not exist. + $this->missingClasses[$class] = true; + } + + return $file; + } + + /** + * Returns the currently registered loaders indexed by their corresponding vendor directories. + * + * @return self[] + */ + public static function getRegisteredLoaders() + { + return self::$registeredLoaders; + } + + private function findFileWithExtension($class, $ext) + { + // PSR-4 lookup + $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext; + + $first = $class[0]; + if (isset($this->prefixLengthsPsr4[$first])) { + $subPath = $class; + while (false !== $lastPos = strrpos($subPath, '\\')) { + $subPath = substr($subPath, 0, $lastPos); + $search = $subPath . '\\'; + if (isset($this->prefixDirsPsr4[$search])) { + $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1); + foreach ($this->prefixDirsPsr4[$search] as $dir) { + if (file_exists($file = $dir . $pathEnd)) { + return $file; + } + } + } + } + } + + // PSR-4 fallback dirs + foreach ($this->fallbackDirsPsr4 as $dir) { + if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) { + return $file; + } + } + + // PSR-0 lookup + if (false !== $pos = strrpos($class, '\\')) { + // namespaced class name + $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1) + . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR); + } else { + // PEAR-like class name + $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext; + } + + if (isset($this->prefixesPsr0[$first])) { + foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) { + if (0 === strpos($class, $prefix)) { + foreach ($dirs as $dir) { + if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) { + return $file; + } + } + } + } + } + + // PSR-0 fallback dirs + foreach ($this->fallbackDirsPsr0 as $dir) { + if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) { + return $file; + } + } + + // PSR-0 include paths. + if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) { + return $file; + } + + return false; + } +} + +/** + * Scope isolated include. + * + * Prevents access to $this/self from included files. + */ +function includeFile($file) +{ + include $file; +} |