/common/libraries/plugin/phpexcel/PHPExcel/Shared/ZipStreamWrapper.php

<?php

/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2011 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    1.7.6, 2011-02-27
 */



/**
 * PHPExcel_Shared_ZipStreamWrapper
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared
 * @copyright  Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
 */

class PHPExcel_Shared_ZipStreamWrapper

{

    /**
     * Internal ZipAcrhive
     *
     * @var ZipAcrhive
     */

    private $_archive;

    

    /**
     * Filename in ZipAcrhive
     *
     * @var string
     */

    private $_fileNameInArchive = '';

    

    /**
     * Position in file
     *
     * @var int
     */

    private $_position = 0;

    

    /**
     * Data
     *
     * @var mixed
     */

    private $_data = '';



    /**
     * Register wrapper
     */

    public static function register()

    {

        @stream_wrapper_unregister("zip");

        @stream_wrapper_register("zip", __CLASS__);

    }



    /**
     * Open stream
     */

    public function stream_open($path, $mode, $options, &$opened_path)

    {

        // Check for mode
        if ($mode{0} != 'r')

        {

            throw new Exception('Mode ' . $mode . ' is not supported. Only read mode is supported.');

        }

        

        $pos = strrpos($path, '#');

        $url['host'] = substr($path, 6, $pos - 6); // 6: strlen('zip://')
        $url['fragment'] = substr($path, $pos + 1);

        

        // Open archive
        $this->_archive = new ZipArchive();

        $this->_archive->open($url['host']);

        

        $this->_fileNameInArchive = $url['fragment'];

        $this->_position = 0;

        $this->_data = $this->_archive->getFromName($this->_fileNameInArchive);

        

        return true;

    }



    /**
     * Stat stream
     */

    public function stream_stat()

    {

        return $this->_archive->statName($this->_fileNameInArchive);

    }



    /**
     * Read stream
     */

    function stream_read($count)

    {

        $ret = substr($this->_data, $this->_position, $count);

        $this->_position += strlen($ret);

        return $ret;

    }



    /**
     * Tell stream
     */

    public function stream_tell()

    {

        return $this->_position;

    }



    /**
     * EOF stream
     */

    public function stream_eof()

    {

        return $this->_position >= strlen($this->_data);

    }



    /**
     * Seek stream
     */

    public function stream_seek($offset, $whence)

    {

        switch ($whence)

        {

            case SEEK_SET :

                if ($offset < strlen($this->_data) && $offset >= 0)

                {

                    $this->_position = $offset;

                    return true;

                }

                else

                {

                    return false;

                }

                break;

            

            case SEEK_CUR :

                if ($offset >= 0)

                {

                    $this->_position += $offset;

                    return true;

                }

                else

                {

                    return false;

                }

                break;

            

            case SEEK_END :

                if (strlen($this->_data) + $offset >= 0)

                {

                    $this->_position = strlen($this->_data) + $offset;

                    return true;

                }

                else

                {

                    return false;

                }

                break;

            

            default :

                return false;

        }

    }

}