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+<?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) {

+            //no-op

+        } elseif ($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;

+}