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<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2012 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 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.7, 2012-05-19
*/
/**
* PHPExcel_Shared_ZipStreamWrapper
*
* @category PHPExcel
* @package PHPExcel_Shared
* @copyright Copyright (c) 2006 - 2012 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__);
}
/**
* Implements support for fopen().
*
* @param string $path resource name including scheme, e.g.
* @param string $mode only "r" is supported
* @param int $options mask of STREAM_REPORT_ERRORS and STREAM_USE_PATH
* @param string &$openedPath absolute path of the opened stream (out parameter)
* @return bool true on success
*/
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;
}
/**
* Implements support for fstat().
*
* @return boolean
*/
public function stream_stat() {
return $this->_archive->statName( $this->_fileNameInArchive );
}
/**
* Implements support for fread(), fgets() etc.
*
* @param int $count maximum number of bytes to read
* @return string
*/
function stream_read($count) {
$ret = substr($this->_data, $this->_position, $count);
$this->_position += strlen($ret);
return $ret;
}
/**
* Returns the position of the file pointer, i.e. its offset into the file
* stream. Implements support for ftell().
*
* @return int
*/
public function stream_tell() {
return $this->_position;
}
/**
* EOF stream
*
* @return bool
*/
public function stream_eof() {
return $this->_position >= strlen($this->_data);
}
/**
* Seek stream
*
* @param int $offset byte offset
* @param int $whence SEEK_SET, SEEK_CUR or SEEK_END
* @return bool
*/
public function stream_seek($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;
}
}
}