<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2012 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_Shared
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version 1.7.7, 2012-05-19
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*/
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/**
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* PHPExcel_Shared_ZipStreamWrapper
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*
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* @category PHPExcel
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* @package PHPExcel_Shared
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel_Shared_ZipStreamWrapper {
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/**
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* Internal ZipAcrhive
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*
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* @var ZipAcrhive
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*/
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private $_archive;
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/**
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* Filename in ZipAcrhive
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*
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* @var string
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*/
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private $_fileNameInArchive = '';
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/**
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* Position in file
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*
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* @var int
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*/
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private $_position = 0;
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/**
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* Data
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*
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* @var mixed
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*/
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private $_data = '';
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/**
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* Register wrapper
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*/
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public static function register() {
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@stream_wrapper_unregister("zip");
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@stream_wrapper_register("zip", __CLASS__);
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}
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/**
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* Implements support for fopen().
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*
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* @param string $path resource name including scheme, e.g.
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* @param string $mode only "r" is supported
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* @param int $options mask of STREAM_REPORT_ERRORS and STREAM_USE_PATH
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* @param string &$openedPath absolute path of the opened stream (out parameter)
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* @return bool true on success
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*/
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public function stream_open($path, $mode, $options, &$opened_path) {
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// Check for mode
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if ($mode{0} != 'r') {
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throw new Exception('Mode ' . $mode . ' is not supported. Only read mode is supported.');
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}
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$pos = strrpos($path, '#');
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$url['host'] = substr($path, 6, $pos - 6); // 6: strlen('zip://')
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$url['fragment'] = substr($path, $pos + 1);
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// Open archive
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$this->_archive = new ZipArchive();
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$this->_archive->open($url['host']);
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$this->_fileNameInArchive = $url['fragment'];
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$this->_position = 0;
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$this->_data = $this->_archive->getFromName( $this->_fileNameInArchive );
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return true;
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}
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/**
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* Implements support for fstat().
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*
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* @return boolean
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*/
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public function stream_stat() {
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return $this->_archive->statName( $this->_fileNameInArchive );
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}
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/**
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* Implements support for fread(), fgets() etc.
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*
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* @param int $count maximum number of bytes to read
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* @return string
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*/
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function stream_read($count) {
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$ret = substr($this->_data, $this->_position, $count);
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$this->_position += strlen($ret);
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return $ret;
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}
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/**
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* Returns the position of the file pointer, i.e. its offset into the file
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* stream. Implements support for ftell().
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*
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* @return int
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*/
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public function stream_tell() {
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return $this->_position;
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}
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/**
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* EOF stream
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*
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* @return bool
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*/
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public function stream_eof() {
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return $this->_position >= strlen($this->_data);
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}
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/**
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* Seek stream
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*
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* @param int $offset byte offset
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* @param int $whence SEEK_SET, SEEK_CUR or SEEK_END
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* @return bool
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*/
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public function stream_seek($offset, $whence) {
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switch ($whence) {
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case SEEK_SET:
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if ($offset < strlen($this->_data) && $offset >= 0) {
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$this->_position = $offset;
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return true;
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} else {
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return false;
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}
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break;
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case SEEK_CUR:
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if ($offset >= 0) {
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$this->_position += $offset;
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return true;
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} else {
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return false;
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}
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break;
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case SEEK_END:
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if (strlen($this->_data) + $offset >= 0) {
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$this->_position = strlen($this->_data) + $offset;
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return true;
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} else {
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return false;
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}
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break;
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default:
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return false;
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}
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}
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}
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