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Application modulaire fonctionnelle !

Emmanuel ROY authored on 12/08/2019 15:10:25
Showing 1 changed files
1 1
deleted file mode 100644
... ...
@@ -1,445 +0,0 @@
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-<?php
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-
3
-/*
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- * This file is part of Composer.
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- *
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- * (c) Nils Adermann <naderman@naderman.de>
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- *     Jordi Boggiano <j.boggiano@seld.be>
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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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-
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-namespace Composer\Autoload;
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-
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-/**
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- * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
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- *
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- *     $loader = new \Composer\Autoload\ClassLoader();
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- *
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- *     // register classes with namespaces
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- *     $loader->add('Symfony\Component', __DIR__.'/component');
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- *     $loader->add('Symfony',           __DIR__.'/framework');
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- *
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- *     // activate the autoloader
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- *     $loader->register();
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- *
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- *     // to enable searching the include path (eg. for PEAR packages)
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- *     $loader->setUseIncludePath(true);
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- *
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- * In this example, if you try to use a class in the Symfony\Component
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- * namespace or one of its children (Symfony\Component\Console for instance),
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- * the autoloader will first look for the class under the component/
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- * directory, and it will then fallback to the framework/ directory if not
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- * found before giving up.
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- *
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- * This class is loosely based on the Symfony UniversalClassLoader.
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- *
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- * @author Fabien Potencier <fabien@symfony.com>
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- * @author Jordi Boggiano <j.boggiano@seld.be>
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- * @see    http://www.php-fig.org/psr/psr-0/
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- * @see    http://www.php-fig.org/psr/psr-4/
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- */
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-class ClassLoader
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-{
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-    // PSR-4
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-    private $prefixLengthsPsr4 = array();
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-    private $prefixDirsPsr4 = array();
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-    private $fallbackDirsPsr4 = array();
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-
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-    // PSR-0
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-    private $prefixesPsr0 = array();
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-    private $fallbackDirsPsr0 = array();
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-
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-    private $useIncludePath = false;
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-    private $classMap = array();
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-    private $classMapAuthoritative = false;
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-    private $missingClasses = array();
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-    private $apcuPrefix;
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-
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-    public function getPrefixes()
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-    {
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-        if (!empty($this->prefixesPsr0)) {
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-            return call_user_func_array('array_merge', $this->prefixesPsr0);
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-        }
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-
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-        return array();
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-    }
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-
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-    public function getPrefixesPsr4()
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-    {
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-        return $this->prefixDirsPsr4;
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-    }
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-
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-    public function getFallbackDirs()
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-    {
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-        return $this->fallbackDirsPsr0;
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-    }
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-
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-    public function getFallbackDirsPsr4()
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-    {
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-        return $this->fallbackDirsPsr4;
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-    }
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-
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-    public function getClassMap()
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-    {
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-        return $this->classMap;
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-    }
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-
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-    /**
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-     * @param array $classMap Class to filename map
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-     */
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-    public function addClassMap(array $classMap)
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-    {
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-        if ($this->classMap) {
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-            $this->classMap = array_merge($this->classMap, $classMap);
96
-        } else {
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-            $this->classMap = $classMap;
98
-        }
99
-    }
100
-
101
-    /**
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-     * Registers a set of PSR-0 directories for a given prefix, either
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-     * appending or prepending to the ones previously set for this prefix.
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-     *
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-     * @param string       $prefix  The prefix
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-     * @param array|string $paths   The PSR-0 root directories
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-     * @param bool         $prepend Whether to prepend the directories
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-     */
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-    public function add($prefix, $paths, $prepend = false)
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-    {
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-        if (!$prefix) {
112
-            if ($prepend) {
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-                $this->fallbackDirsPsr0 = array_merge(
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-                    (array) $paths,
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-                    $this->fallbackDirsPsr0
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-                );
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-            } else {
118
-                $this->fallbackDirsPsr0 = array_merge(
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-                    $this->fallbackDirsPsr0,
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-                    (array) $paths
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-                );
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-            }
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-
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-            return;
125
-        }
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-
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-        $first = $prefix[0];
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-        if (!isset($this->prefixesPsr0[$first][$prefix])) {
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-            $this->prefixesPsr0[$first][$prefix] = (array) $paths;
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-
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-            return;
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-        }
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-        if ($prepend) {
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-            $this->prefixesPsr0[$first][$prefix] = array_merge(
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-                (array) $paths,
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-                $this->prefixesPsr0[$first][$prefix]
137
-            );
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-        } else {
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-            $this->prefixesPsr0[$first][$prefix] = array_merge(
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-                $this->prefixesPsr0[$first][$prefix],
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-                (array) $paths
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-            );
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-        }
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-    }
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-
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-    /**
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-     * Registers a set of PSR-4 directories for a given namespace, either
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-     * appending or prepending to the ones previously set for this namespace.
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-     *
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-     * @param string       $prefix  The prefix/namespace, with trailing '\\'
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-     * @param array|string $paths   The PSR-4 base directories
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-     * @param bool         $prepend Whether to prepend the directories
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-     *
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-     * @throws \InvalidArgumentException
155
-     */
156
-    public function addPsr4($prefix, $paths, $prepend = false)
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-    {
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-        if (!$prefix) {
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-            // Register directories for the root namespace.
160
-            if ($prepend) {
161
-                $this->fallbackDirsPsr4 = array_merge(
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-                    (array) $paths,
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-                    $this->fallbackDirsPsr4
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-                );
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-            } else {
166
-                $this->fallbackDirsPsr4 = array_merge(
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-                    $this->fallbackDirsPsr4,
168
-                    (array) $paths
169
-                );
170
-            }
171
-        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
172
-            // Register directories for a new namespace.
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-            $length = strlen($prefix);
174
-            if ('\\' !== $prefix[$length - 1]) {
175
-                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
176
-            }
177
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
178
-            $this->prefixDirsPsr4[$prefix] = (array) $paths;
179
-        } elseif ($prepend) {
180
-            // Prepend directories for an already registered namespace.
181
-            $this->prefixDirsPsr4[$prefix] = array_merge(
182
-                (array) $paths,
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-                $this->prefixDirsPsr4[$prefix]
184
-            );
185
-        } else {
186
-            // Append directories for an already registered namespace.
187
-            $this->prefixDirsPsr4[$prefix] = array_merge(
188
-                $this->prefixDirsPsr4[$prefix],
189
-                (array) $paths
190
-            );
191
-        }
192
-    }
193
-
194
-    /**
195
-     * Registers a set of PSR-0 directories for a given prefix,
196
-     * replacing any others previously set for this prefix.
197
-     *
198
-     * @param string       $prefix The prefix
199
-     * @param array|string $paths  The PSR-0 base directories
200
-     */
201
-    public function set($prefix, $paths)
202
-    {
203
-        if (!$prefix) {
204
-            $this->fallbackDirsPsr0 = (array) $paths;
205
-        } else {
206
-            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
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-        }
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-    }
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-
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-    /**
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-     * Registers a set of PSR-4 directories for a given namespace,
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-     * replacing any others previously set for this namespace.
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-     *
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-     * @param string       $prefix The prefix/namespace, with trailing '\\'
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-     * @param array|string $paths  The PSR-4 base directories
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-     *
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-     * @throws \InvalidArgumentException
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-     */
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-    public function setPsr4($prefix, $paths)
220
-    {
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-        if (!$prefix) {
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-            $this->fallbackDirsPsr4 = (array) $paths;
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-        } else {
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-            $length = strlen($prefix);
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-            if ('\\' !== $prefix[$length - 1]) {
226
-                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
227
-            }
228
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
229
-            $this->prefixDirsPsr4[$prefix] = (array) $paths;
230
-        }
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-    }
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-
233
-    /**
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-     * Turns on searching the include path for class files.
235
-     *
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-     * @param bool $useIncludePath
237
-     */
238
-    public function setUseIncludePath($useIncludePath)
239
-    {
240
-        $this->useIncludePath = $useIncludePath;
241
-    }
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-
243
-    /**
244
-     * Can be used to check if the autoloader uses the include path to check
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-     * for classes.
246
-     *
247
-     * @return bool
248
-     */
249
-    public function getUseIncludePath()
250
-    {
251
-        return $this->useIncludePath;
252
-    }
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-
254
-    /**
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-     * Turns off searching the prefix and fallback directories for classes
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-     * that have not been registered with the class map.
257
-     *
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-     * @param bool $classMapAuthoritative
259
-     */
260
-    public function setClassMapAuthoritative($classMapAuthoritative)
261
-    {
262
-        $this->classMapAuthoritative = $classMapAuthoritative;
263
-    }
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-
265
-    /**
266
-     * Should class lookup fail if not found in the current class map?
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-     *
268
-     * @return bool
269
-     */
270
-    public function isClassMapAuthoritative()
271
-    {
272
-        return $this->classMapAuthoritative;
273
-    }
274
-
275
-    /**
276
-     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
277
-     *
278
-     * @param string|null $apcuPrefix
279
-     */
280
-    public function setApcuPrefix($apcuPrefix)
281
-    {
282
-        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
283
-    }
284
-
285
-    /**
286
-     * The APCu prefix in use, or null if APCu caching is not enabled.
287
-     *
288
-     * @return string|null
289
-     */
290
-    public function getApcuPrefix()
291
-    {
292
-        return $this->apcuPrefix;
293
-    }
294
-
295
-    /**
296
-     * Registers this instance as an autoloader.
297
-     *
298
-     * @param bool $prepend Whether to prepend the autoloader or not
299
-     */
300
-    public function register($prepend = false)
301
-    {
302
-        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
303
-    }
304
-
305
-    /**
306
-     * Unregisters this instance as an autoloader.
307
-     */
308
-    public function unregister()
309
-    {
310
-        spl_autoload_unregister(array($this, 'loadClass'));
311
-    }
312
-
313
-    /**
314
-     * Loads the given class or interface.
315
-     *
316
-     * @param  string    $class The name of the class
317
-     * @return bool|null True if loaded, null otherwise
318
-     */
319
-    public function loadClass($class)
320
-    {
321
-        if ($file = $this->findFile($class)) {
322
-            includeFile($file);
323
-
324
-            return true;
325
-        }
326
-    }
327
-
328
-    /**
329
-     * Finds the path to the file where the class is defined.
330
-     *
331
-     * @param string $class The name of the class
332
-     *
333
-     * @return string|false The path if found, false otherwise
334
-     */
335
-    public function findFile($class)
336
-    {
337
-        // class map lookup
338
-        if (isset($this->classMap[$class])) {
339
-            return $this->classMap[$class];
340
-        }
341
-        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
342
-            return false;
343
-        }
344
-        if (null !== $this->apcuPrefix) {
345
-            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
346
-            if ($hit) {
347
-                return $file;
348
-            }
349
-        }
350
-
351
-        $file = $this->findFileWithExtension($class, '.php');
352
-
353
-        // Search for Hack files if we are running on HHVM
354
-        if (false === $file && defined('HHVM_VERSION')) {
355
-            $file = $this->findFileWithExtension($class, '.hh');
356
-        }
357
-
358
-        if (null !== $this->apcuPrefix) {
359
-            apcu_add($this->apcuPrefix.$class, $file);
360
-        }
361
-
362
-        if (false === $file) {
363
-            // Remember that this class does not exist.
364
-            $this->missingClasses[$class] = true;
365
-        }
366
-
367
-        return $file;
368
-    }
369
-
370
-    private function findFileWithExtension($class, $ext)
371
-    {
372
-        // PSR-4 lookup
373
-        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
374
-
375
-        $first = $class[0];
376
-        if (isset($this->prefixLengthsPsr4[$first])) {
377
-            $subPath = $class;
378
-            while (false !== $lastPos = strrpos($subPath, '\\')) {
379
-                $subPath = substr($subPath, 0, $lastPos);
380
-                $search = $subPath . '\\';
381
-                if (isset($this->prefixDirsPsr4[$search])) {
382
-                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
383
-                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
384
-                        if (file_exists($file = $dir . $pathEnd)) {
385
-                            return $file;
386
-                        }
387
-                    }
388
-                }
389
-            }
390
-        }
391
-
392
-        // PSR-4 fallback dirs
393
-        foreach ($this->fallbackDirsPsr4 as $dir) {
394
-            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
395
-                return $file;
396
-            }
397
-        }
398
-
399
-        // PSR-0 lookup
400
-        if (false !== $pos = strrpos($class, '\\')) {
401
-            // namespaced class name
402
-            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
403
-                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
404
-        } else {
405
-            // PEAR-like class name
406
-            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
407
-        }
408
-
409
-        if (isset($this->prefixesPsr0[$first])) {
410
-            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
411
-                if (0 === strpos($class, $prefix)) {
412
-                    foreach ($dirs as $dir) {
413
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
414
-                            return $file;
415
-                        }
416
-                    }
417
-                }
418
-            }
419
-        }
420
-
421
-        // PSR-0 fallback dirs
422
-        foreach ($this->fallbackDirsPsr0 as $dir) {
423
-            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
424
-                return $file;
425
-            }
426
-        }
427
-
428
-        // PSR-0 include paths.
429
-        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
430
-            return $file;
431
-        }
432
-
433
-        return false;
434
-    }
435
-}
436
-
437
-/**
438
- * Scope isolated include.
439
- *
440
- * Prevents access to $this/self from included files.
441
- */
442
-function includeFile($file)
443
-{
444
-    include $file;
445
-}
Browse code

initial commit

Emmanuel ROY authored on 09/08/2019 08:39:02
Showing 1 changed files
1 1
new file mode 100644
... ...
@@ -0,0 +1,445 @@
1
+<?php
2
+
3
+/*
4
+ * This file is part of Composer.
5
+ *
6
+ * (c) Nils Adermann <naderman@naderman.de>
7
+ *     Jordi Boggiano <j.boggiano@seld.be>
8
+ *
9
+ * For the full copyright and license information, please view the LICENSE
10
+ * file that was distributed with this source code.
11
+ */
12
+
13
+namespace Composer\Autoload;
14
+
15
+/**
16
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
17
+ *
18
+ *     $loader = new \Composer\Autoload\ClassLoader();
19
+ *
20
+ *     // register classes with namespaces
21
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
22
+ *     $loader->add('Symfony',           __DIR__.'/framework');
23
+ *
24
+ *     // activate the autoloader
25
+ *     $loader->register();
26
+ *
27
+ *     // to enable searching the include path (eg. for PEAR packages)
28
+ *     $loader->setUseIncludePath(true);
29
+ *
30
+ * In this example, if you try to use a class in the Symfony\Component
31
+ * namespace or one of its children (Symfony\Component\Console for instance),
32
+ * the autoloader will first look for the class under the component/
33
+ * directory, and it will then fallback to the framework/ directory if not
34
+ * found before giving up.
35
+ *
36
+ * This class is loosely based on the Symfony UniversalClassLoader.
37
+ *
38
+ * @author Fabien Potencier <fabien@symfony.com>
39
+ * @author Jordi Boggiano <j.boggiano@seld.be>
40
+ * @see    http://www.php-fig.org/psr/psr-0/
41
+ * @see    http://www.php-fig.org/psr/psr-4/
42
+ */
43
+class ClassLoader
44
+{
45
+    // PSR-4
46
+    private $prefixLengthsPsr4 = array();
47
+    private $prefixDirsPsr4 = array();
48
+    private $fallbackDirsPsr4 = array();
49
+
50
+    // PSR-0
51
+    private $prefixesPsr0 = array();
52
+    private $fallbackDirsPsr0 = array();
53
+
54
+    private $useIncludePath = false;
55
+    private $classMap = array();
56
+    private $classMapAuthoritative = false;
57
+    private $missingClasses = array();
58
+    private $apcuPrefix;
59
+
60
+    public function getPrefixes()
61
+    {
62
+        if (!empty($this->prefixesPsr0)) {
63
+            return call_user_func_array('array_merge', $this->prefixesPsr0);
64
+        }
65
+
66
+        return array();
67
+    }
68
+
69
+    public function getPrefixesPsr4()
70
+    {
71
+        return $this->prefixDirsPsr4;
72
+    }
73
+
74
+    public function getFallbackDirs()
75
+    {
76
+        return $this->fallbackDirsPsr0;
77
+    }
78
+
79
+    public function getFallbackDirsPsr4()
80
+    {
81
+        return $this->fallbackDirsPsr4;
82
+    }
83
+
84
+    public function getClassMap()
85
+    {
86
+        return $this->classMap;
87
+    }
88
+
89
+    /**
90
+     * @param array $classMap Class to filename map
91
+     */
92
+    public function addClassMap(array $classMap)
93
+    {
94
+        if ($this->classMap) {
95
+            $this->classMap = array_merge($this->classMap, $classMap);
96
+        } else {
97
+            $this->classMap = $classMap;
98
+        }
99
+    }
100
+
101
+    /**
102
+     * Registers a set of PSR-0 directories for a given prefix, either
103
+     * appending or prepending to the ones previously set for this prefix.
104
+     *
105
+     * @param string       $prefix  The prefix
106
+     * @param array|string $paths   The PSR-0 root directories
107
+     * @param bool         $prepend Whether to prepend the directories
108
+     */
109
+    public function add($prefix, $paths, $prepend = false)
110
+    {
111
+        if (!$prefix) {
112
+            if ($prepend) {
113
+                $this->fallbackDirsPsr0 = array_merge(
114
+                    (array) $paths,
115
+                    $this->fallbackDirsPsr0
116
+                );
117
+            } else {
118
+                $this->fallbackDirsPsr0 = array_merge(
119
+                    $this->fallbackDirsPsr0,
120
+                    (array) $paths
121
+                );
122
+            }
123
+
124
+            return;
125
+        }
126
+
127
+        $first = $prefix[0];
128
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
129
+            $this->prefixesPsr0[$first][$prefix] = (array) $paths;
130
+
131
+            return;
132
+        }
133
+        if ($prepend) {
134
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
135
+                (array) $paths,
136
+                $this->prefixesPsr0[$first][$prefix]
137
+            );
138
+        } else {
139
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
140
+                $this->prefixesPsr0[$first][$prefix],
141
+                (array) $paths
142
+            );
143
+        }
144
+    }
145
+
146
+    /**
147
+     * Registers a set of PSR-4 directories for a given namespace, either
148
+     * appending or prepending to the ones previously set for this namespace.
149
+     *
150
+     * @param string       $prefix  The prefix/namespace, with trailing '\\'
151
+     * @param array|string $paths   The PSR-4 base directories
152
+     * @param bool         $prepend Whether to prepend the directories
153
+     *
154
+     * @throws \InvalidArgumentException
155
+     */
156
+    public function addPsr4($prefix, $paths, $prepend = false)
157
+    {
158
+        if (!$prefix) {
159
+            // Register directories for the root namespace.
160
+            if ($prepend) {
161
+                $this->fallbackDirsPsr4 = array_merge(
162
+                    (array) $paths,
163
+                    $this->fallbackDirsPsr4
164
+                );
165
+            } else {
166
+                $this->fallbackDirsPsr4 = array_merge(
167
+                    $this->fallbackDirsPsr4,
168
+                    (array) $paths
169
+                );
170
+            }
171
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
172
+            // Register directories for a new namespace.
173
+            $length = strlen($prefix);
174
+            if ('\\' !== $prefix[$length - 1]) {
175
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
176
+            }
177
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
178
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
179
+        } elseif ($prepend) {
180
+            // Prepend directories for an already registered namespace.
181
+            $this->prefixDirsPsr4[$prefix] = array_merge(
182
+                (array) $paths,
183
+                $this->prefixDirsPsr4[$prefix]
184
+            );
185
+        } else {
186
+            // Append directories for an already registered namespace.
187
+            $this->prefixDirsPsr4[$prefix] = array_merge(
188
+                $this->prefixDirsPsr4[$prefix],
189
+                (array) $paths
190
+            );
191
+        }
192
+    }
193
+
194
+    /**
195
+     * Registers a set of PSR-0 directories for a given prefix,
196
+     * replacing any others previously set for this prefix.
197
+     *
198
+     * @param string       $prefix The prefix
199
+     * @param array|string $paths  The PSR-0 base directories
200
+     */
201
+    public function set($prefix, $paths)
202
+    {
203
+        if (!$prefix) {
204
+            $this->fallbackDirsPsr0 = (array) $paths;
205
+        } else {
206
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
207
+        }
208
+    }
209
+
210
+    /**
211
+     * Registers a set of PSR-4 directories for a given namespace,
212
+     * replacing any others previously set for this namespace.
213
+     *
214
+     * @param string       $prefix The prefix/namespace, with trailing '\\'
215
+     * @param array|string $paths  The PSR-4 base directories
216
+     *
217
+     * @throws \InvalidArgumentException
218
+     */
219
+    public function setPsr4($prefix, $paths)
220
+    {
221
+        if (!$prefix) {
222
+            $this->fallbackDirsPsr4 = (array) $paths;
223
+        } else {
224
+            $length = strlen($prefix);
225
+            if ('\\' !== $prefix[$length - 1]) {
226
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
227
+            }
228
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
229
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
230
+        }
231
+    }
232
+
233
+    /**
234
+     * Turns on searching the include path for class files.
235
+     *
236
+     * @param bool $useIncludePath
237
+     */
238
+    public function setUseIncludePath($useIncludePath)
239
+    {
240
+        $this->useIncludePath = $useIncludePath;
241
+    }
242
+
243
+    /**
244
+     * Can be used to check if the autoloader uses the include path to check
245
+     * for classes.
246
+     *
247
+     * @return bool
248
+     */
249
+    public function getUseIncludePath()
250
+    {
251
+        return $this->useIncludePath;
252
+    }
253
+
254
+    /**
255
+     * Turns off searching the prefix and fallback directories for classes
256
+     * that have not been registered with the class map.
257
+     *
258
+     * @param bool $classMapAuthoritative
259
+     */
260
+    public function setClassMapAuthoritative($classMapAuthoritative)
261
+    {
262
+        $this->classMapAuthoritative = $classMapAuthoritative;
263
+    }
264
+
265
+    /**
266
+     * Should class lookup fail if not found in the current class map?
267
+     *
268
+     * @return bool
269
+     */
270
+    public function isClassMapAuthoritative()
271
+    {
272
+        return $this->classMapAuthoritative;
273
+    }
274
+
275
+    /**
276
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
277
+     *
278
+     * @param string|null $apcuPrefix
279
+     */
280
+    public function setApcuPrefix($apcuPrefix)
281
+    {
282
+        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
283
+    }
284
+
285
+    /**
286
+     * The APCu prefix in use, or null if APCu caching is not enabled.
287
+     *
288
+     * @return string|null
289
+     */
290
+    public function getApcuPrefix()
291
+    {
292
+        return $this->apcuPrefix;
293
+    }
294
+
295
+    /**
296
+     * Registers this instance as an autoloader.
297
+     *
298
+     * @param bool $prepend Whether to prepend the autoloader or not
299
+     */
300
+    public function register($prepend = false)
301
+    {
302
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
303
+    }
304
+
305
+    /**
306
+     * Unregisters this instance as an autoloader.
307
+     */
308
+    public function unregister()
309
+    {
310
+        spl_autoload_unregister(array($this, 'loadClass'));
311
+    }
312
+
313
+    /**
314
+     * Loads the given class or interface.
315
+     *
316
+     * @param  string    $class The name of the class
317
+     * @return bool|null True if loaded, null otherwise
318
+     */
319
+    public function loadClass($class)
320
+    {
321
+        if ($file = $this->findFile($class)) {
322
+            includeFile($file);
323
+
324
+            return true;
325
+        }
326
+    }
327
+
328
+    /**
329
+     * Finds the path to the file where the class is defined.
330
+     *
331
+     * @param string $class The name of the class
332
+     *
333
+     * @return string|false The path if found, false otherwise
334
+     */
335
+    public function findFile($class)
336
+    {
337
+        // class map lookup
338
+        if (isset($this->classMap[$class])) {
339
+            return $this->classMap[$class];
340
+        }
341
+        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
342
+            return false;
343
+        }
344
+        if (null !== $this->apcuPrefix) {
345
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
346
+            if ($hit) {
347
+                return $file;
348
+            }
349
+        }
350
+
351
+        $file = $this->findFileWithExtension($class, '.php');
352
+
353
+        // Search for Hack files if we are running on HHVM
354
+        if (false === $file && defined('HHVM_VERSION')) {
355
+            $file = $this->findFileWithExtension($class, '.hh');
356
+        }
357
+
358
+        if (null !== $this->apcuPrefix) {
359
+            apcu_add($this->apcuPrefix.$class, $file);
360
+        }
361
+
362
+        if (false === $file) {
363
+            // Remember that this class does not exist.
364
+            $this->missingClasses[$class] = true;
365
+        }
366
+
367
+        return $file;
368
+    }
369
+
370
+    private function findFileWithExtension($class, $ext)
371
+    {
372
+        // PSR-4 lookup
373
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
374
+
375
+        $first = $class[0];
376
+        if (isset($this->prefixLengthsPsr4[$first])) {
377
+            $subPath = $class;
378
+            while (false !== $lastPos = strrpos($subPath, '\\')) {
379
+                $subPath = substr($subPath, 0, $lastPos);
380
+                $search = $subPath . '\\';
381
+                if (isset($this->prefixDirsPsr4[$search])) {
382
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
383
+                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
384
+                        if (file_exists($file = $dir . $pathEnd)) {
385
+                            return $file;
386
+                        }
387
+                    }
388
+                }
389
+            }
390
+        }
391
+
392
+        // PSR-4 fallback dirs
393
+        foreach ($this->fallbackDirsPsr4 as $dir) {
394
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
395
+                return $file;
396
+            }
397
+        }
398
+
399
+        // PSR-0 lookup
400
+        if (false !== $pos = strrpos($class, '\\')) {
401
+            // namespaced class name
402
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
403
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
404
+        } else {
405
+            // PEAR-like class name
406
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
407
+        }
408
+
409
+        if (isset($this->prefixesPsr0[$first])) {
410
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
411
+                if (0 === strpos($class, $prefix)) {
412
+                    foreach ($dirs as $dir) {
413
+                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
414
+                            return $file;
415
+                        }
416
+                    }
417
+                }
418
+            }
419
+        }
420
+
421
+        // PSR-0 fallback dirs
422
+        foreach ($this->fallbackDirsPsr0 as $dir) {
423
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
424
+                return $file;
425
+            }
426
+        }
427
+
428
+        // PSR-0 include paths.
429
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
430
+            return $file;
431
+        }
432
+
433
+        return false;
434
+    }
435
+}
436
+
437
+/**
438
+ * Scope isolated include.
439
+ *
440
+ * Prevents access to $this/self from included files.
441
+ */
442
+function includeFile($file)
443
+{
444
+    include $file;
445
+}