<?php

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/**

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* Poor man's PHP 5.2 port of FilesystemIterator from PHP 5.3.

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*

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* WARNING: Do not use this one in PHP >=5.3, use native FilesystemIterator instead.

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*

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* @see http://php.net/manual/en/class.filesystemiterator.php

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* @see https://github.com/php/php-src/blob/master/ext/spl/spl_directory.c

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*/

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class Symfony_Filesystem_FilesystemIterator extends DirectoryIterator implements SeekableIterator

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{

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const CURRENT_AS_PATHNAME = 32;

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const CURRENT_AS_FILEINFO = 0;

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const CURRENT_AS_SELF = 16;

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const CURRENT_MODE_MASK = 240;

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const KEY_AS_PATHNAME = 0;

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const KEY_AS_FILENAME = 256;

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const FOLLOW_SYMLINKS = 512;

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const KEY_MODE_MASK = 3840;

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const NEW_CURRENT_AND_KEY = 256;

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const SKIP_DOTS = 4096;

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const UNIX_PATHS = 8192;

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private $flags;

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/**

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* @param string $path

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* @param int $flags

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*/

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public function __construct($path, $flags = null)

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{

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if ($flags === null) {

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$flags = self::KEY_AS_PATHNAME | self::CURRENT_AS_FILEINFO | self::SKIP_DOTS;

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}

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$this->flags = $flags;

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parent::__construct($path);

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}

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/**

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* @return mixed

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*/

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public function current()

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{

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if ($this->flags & self::CURRENT_AS_PATHNAME) {

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return $this->getPathname();

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} elseif ($this->flags & self::CURRENT_AS_SELF) {

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return $this;

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} else {

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return $this->getFileInfo();

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}

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}

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/**

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* @return string

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*/

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public function key()

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{

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if ($this->flags & self::KEY_AS_FILENAME) {

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return $this->getFilename();

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}

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return $this->getPathname();

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}

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/**

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*/

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public function next()

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{

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do {

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parent::next();

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} while ($this->isDot());

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}

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/**

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*/

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public function rewind()

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{

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parent::rewind();

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while ($this->isDot()) {

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$this->next();

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}

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}

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/**

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* @param int $flags

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*/

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public function setFlags($flags)

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{

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$this->flags = $flags;

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}

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/**

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* @return int

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*/

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public function getFlags()

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{

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return $this->flags;

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}

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/**

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* Overridden to not crash PHP 5.2, because DirectoryIterator::seek was added in 5.3.

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*

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* @link http://lxr.php.net/xref/PHP_5_3/ext/spl/spl_directory.c#807

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*/

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public function seek($position)

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{

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if (is_callable(array('parent', 'seek'))) {

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parent::seek($position);

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return;

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}

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if ($this->key() > $position) {

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$this->rewind();

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}

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while ($this->key() < $position) {

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if (!$this->valid()) {

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return;

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}

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$this->next();

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}

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}

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}

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