visualizer / vendor / phpoffice / phpexcel / Classes / PHPExcel / Shared / ZipStreamWrapper.php

ZipStreamWrapper.php in Visualizer – Tables & Charts Manager with Built-in AI Generator 3.0.3, at vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/ZipStreamWrapper.php

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1	<?php
2	/**
3	* PHPExcel
4	*
5	* Copyright (c) 2006 - 2014 PHPExcel
6	*
7	* This library is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* This library is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with this library; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	*
21	* @category PHPExcel
22	* @package PHPExcel_Shared
23	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24	* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
25	* @version ##VERSION##, ##DATE##
26	*/
27
28
29	/**
30	* PHPExcel_Shared_ZipStreamWrapper
31	*
32	* @category PHPExcel
33	* @package PHPExcel_Shared
34	* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35	*/
36	class PHPExcel_Shared_ZipStreamWrapper {
37	/**
38	* Internal ZipAcrhive
39	*
40	* @var ZipAcrhive
41	*/
42	private $_archive;
43
44	/**
45	* Filename in ZipAcrhive
46	*
47	* @var string
48	*/
49	private $_fileNameInArchive = '';
50
51	/**
52	* Position in file
53	*
54	* @var int
55	*/
56	private $_position = 0;
57
58	/**
59	* Data
60	*
61	* @var mixed
62	*/
63	private $_data = '';
64
65	/**
66	* Register wrapper
67	*/
68	public static function register() {
69	@stream_wrapper_unregister("zip");
70	@stream_wrapper_register("zip", __CLASS__);
71	}
72
73	/**
74	* Implements support for fopen().
75	*
76	* @param string $path resource name including scheme, e.g.
77	* @param string $mode only "r" is supported
78	* @param int $options mask of STREAM_REPORT_ERRORS and STREAM_USE_PATH
79	* @param string &$openedPath absolute path of the opened stream (out parameter)
80	* @return bool true on success
81	*/
82	public function stream_open($path, $mode, $options, &$opened_path) {
83	// Check for mode
84	if ($mode{0} != 'r') {
85	throw new PHPExcel_Reader_Exception('Mode ' . $mode . ' is not supported. Only read mode is supported.');
86	}
87
88	$pos = strrpos($path, '#');
89	$url['host'] = substr($path, 6, $pos - 6); // 6: strlen('zip://')
90	$url['fragment'] = substr($path, $pos + 1);
91
92	// Open archive
93	$this->_archive = new ZipArchive();
94	$this->_archive->open($url['host']);
95
96	$this->_fileNameInArchive = $url['fragment'];
97	$this->_position = 0;
98	$this->_data = $this->_archive->getFromName( $this->_fileNameInArchive );
99
100	return true;
101	}
102
103	/**
104	* Implements support for fstat().
105	*
106	* @return boolean
107	*/
108	public function statName() {
109	return $this->_fileNameInArchive;
110	}
111
112	/**
113	* Implements support for fstat().
114	*
115	* @return boolean
116	*/
117	public function url_stat() {
118	return $this->statName( $this->_fileNameInArchive );
119	}
120
121	/**
122	* Implements support for fstat().
123	*
124	* @return boolean
125	*/
126	public function stream_stat() {
127	return $this->_archive->statName( $this->_fileNameInArchive );
128	}
129
130	/**
131	* Implements support for fread(), fgets() etc.
132	*
133	* @param int $count maximum number of bytes to read
134	* @return string
135	*/
136	function stream_read($count) {
137	$ret = substr($this->_data, $this->_position, $count);
138	$this->_position += strlen($ret);
139	return $ret;
140	}
141
142	/**
143	* Returns the position of the file pointer, i.e. its offset into the file
144	* stream. Implements support for ftell().
145	*
146	* @return int
147	*/
148	public function stream_tell() {
149	return $this->_position;
150	}
151
152	/**
153	* EOF stream
154	*
155	* @return bool
156	*/
157	public function stream_eof() {
158	return $this->_position >= strlen($this->_data);
159	}
160
161	/**
162	* Seek stream
163	*
164	* @param int $offset byte offset
165	* @param int $whence SEEK_SET, SEEK_CUR or SEEK_END
166	* @return bool
167	*/
168	public function stream_seek($offset, $whence) {
169	switch ($whence) {
170	case SEEK_SET:
171	if ($offset < strlen($this->_data) && $offset >= 0) {
172	$this->_position = $offset;
173	return true;
174	} else {
175	return false;
176	}
177	break;
178
179	case SEEK_CUR:
180	if ($offset >= 0) {
181	$this->_position += $offset;
182	return true;
183	} else {
184	return false;
185	}
186	break;
187
188	case SEEK_END:
189	if (strlen($this->_data) + $offset >= 0) {
190	$this->_position = strlen($this->_data) + $offset;
191	return true;
192	} else {
193	return false;
194	}
195	break;
196
197	default:
198	return false;
199	}
200	}
201	}
202