| commit | author | age | ||
| 95ebbc | 1 | <?php |
| T | 2 | // +----------------------------------------------------------------------+ |
| 3 | // | PHP version 5 | | |
| 4 | // +----------------------------------------------------------------------+ | |
| 5 | // | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, | | |
| 6 | // | Stig. S. Bakken, Lukas Smith | | |
| 7 | // | All rights reserved. | | |
| 8 | // +----------------------------------------------------------------------+ | |
| 9 | // | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB | | |
| 10 | // | API as well as database abstraction for PHP applications. | | |
| 11 | // | This LICENSE is in the BSD license style. | | |
| 12 | // | | | |
| 13 | // | Redistribution and use in source and binary forms, with or without | | |
| 14 | // | modification, are permitted provided that the following conditions | | |
| 15 | // | are met: | | |
| 16 | // | | | |
| 17 | // | Redistributions of source code must retain the above copyright | | |
| 18 | // | notice, this list of conditions and the following disclaimer. | | |
| 19 | // | | | |
| 20 | // | Redistributions in binary form must reproduce the above copyright | | |
| 21 | // | notice, this list of conditions and the following disclaimer in the | | |
| 22 | // | documentation and/or other materials provided with the distribution. | | |
| 23 | // | | | |
| 24 | // | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, | | |
| 25 | // | Lukas Smith nor the names of his contributors may be used to endorse | | |
| 26 | // | or promote products derived from this software without specific prior| | |
| 27 | // | written permission. | | |
| 28 | // | | | |
| 29 | // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | | |
| 30 | // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | | |
| 31 | // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | | |
| 32 | // | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | | |
| 33 | // | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | | |
| 34 | // | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | | |
| 35 | // | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS| | |
| 36 | // | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | | |
| 37 | // | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | | |
| 38 | // | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY| | |
| 39 | // | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | |
| 40 | // | POSSIBILITY OF SUCH DAMAGE. | | |
| 41 | // +----------------------------------------------------------------------+ | |
| 42 | // | Author: Lukas Smith <smith@pooteeweet.org> | | |
| 43 | // +----------------------------------------------------------------------+ | |
| 44 | // | |
| 45 | // $Id: LOB.php,v 1.34 2006/10/25 11:52:21 lsmith Exp $ | |
| 46 | ||
| 47 | /** | |
| 48 | * @package MDB2 | |
| 49 | * @category Database | |
| 50 | * @author Lukas Smith <smith@pooteeweet.org> | |
| 51 | */ | |
| 52 | ||
| 53 | require_once 'MDB2.php'; | |
| 54 | ||
| 55 | /** | |
| 56 | * MDB2_LOB: user land stream wrapper implementation for LOB support | |
| 57 | * | |
| 58 | * @package MDB2 | |
| 59 | * @category Database | |
| 60 | * @author Lukas Smith <smith@pooteeweet.org> | |
| 61 | */ | |
| 62 | class MDB2_LOB | |
| 63 | { | |
| 64 | /** | |
| 65 | * contains the key to the global MDB2 instance array of the associated | |
| 66 | * MDB2 instance | |
| 67 | * | |
| 68 | * @var integer | |
| 69 | * @access protected | |
| 70 | */ | |
| 71 | var $db_index; | |
| 72 | ||
| 73 | /** | |
| 74 | * contains the key to the global MDB2_LOB instance array of the associated | |
| 75 | * MDB2_LOB instance | |
| 76 | * | |
| 77 | * @var integer | |
| 78 | * @access protected | |
| 79 | */ | |
| 80 | var $lob_index; | |
| 81 | ||
| 82 | // {{{ stream_open() | |
| 83 | ||
| 84 | /** | |
| 85 | * open stream | |
| 86 | * | |
| 87 | * @param string specifies the URL that was passed to fopen() | |
| 88 | * @param string the mode used to open the file | |
| 89 | * @param int holds additional flags set by the streams API | |
| 90 | * @param string not used | |
| 91 | * | |
| 92 | * @return bool | |
| 93 | * @access public | |
| 94 | */ | |
| 95 | function stream_open($path, $mode, $options, &$opened_path) | |
| 96 | { | |
| 97 | if (!preg_match('/^rb?\+?$/', $mode)) { | |
| 98 | return false; | |
| 99 | } | |
| 100 | $url = parse_url($path); | |
| 101 | if (empty($url['host'])) { | |
| 102 | return false; | |
| 103 | } | |
| 104 | $this->db_index = (int)$url['host']; | |
| 105 | if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) { | |
| 106 | return false; | |
| 107 | } | |
| 108 | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; | |
| 109 | $this->lob_index = (int)$url['user']; | |
| 110 | if (!isset($db->datatype->lobs[$this->lob_index])) { | |
| 111 | return false; | |
| 112 | } | |
| 113 | return true; | |
| 114 | } | |
| 115 | // }}} | |
| 116 | ||
| 117 | // {{{ stream_read() | |
| 118 | ||
| 119 | /** | |
| 120 | * read stream | |
| 121 | * | |
| 122 | * @param int number of bytes to read | |
| 123 | * | |
| 124 | * @return string | |
| 125 | * @access public | |
| 126 | */ | |
| 127 | function stream_read($count) | |
| 128 | { | |
| 129 | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { | |
| 130 | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; | |
| 131 | $db->datatype->_retrieveLOB($db->datatype->lobs[$this->lob_index]); | |
| 132 | ||
| 133 | $data = $db->datatype->_readLOB($db->datatype->lobs[$this->lob_index], $count); | |
| 134 | $length = strlen($data); | |
| 135 | if ($length == 0) { | |
| 136 | $db->datatype->lobs[$this->lob_index]['endOfLOB'] = true; | |
| 137 | } | |
| 138 | $db->datatype->lobs[$this->lob_index]['position'] += $length; | |
| 139 | return $data; | |
| 140 | } | |
| 141 | } | |
| 142 | // }}} | |
| 143 | ||
| 144 | // {{{ stream_write() | |
| 145 | ||
| 146 | /** | |
| 147 | * write stream, note implemented | |
| 148 | * | |
| 149 | * @param string data | |
| 150 | * | |
| 151 | * @return int | |
| 152 | * @access public | |
| 153 | */ | |
| 154 | function stream_write($data) | |
| 155 | { | |
| 156 | return 0; | |
| 157 | } | |
| 158 | // }}} | |
| 159 | ||
| 160 | // {{{ stream_tell() | |
| 161 | ||
| 162 | /** | |
| 163 | * return the current position | |
| 164 | * | |
| 165 | * @return int current position | |
| 166 | * @access public | |
| 167 | */ | |
| 168 | function stream_tell() | |
| 169 | { | |
| 170 | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { | |
| 171 | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; | |
| 172 | return $db->datatype->lobs[$this->lob_index]['position']; | |
| 173 | } | |
| 174 | } | |
| 175 | // }}} | |
| 176 | ||
| 177 | // {{{ stream_eof() | |
| 178 | ||
| 179 | /** | |
| 180 | * Check if stream reaches EOF | |
| 181 | * | |
| 182 | * @return bool | |
| 183 | * @access public | |
| 184 | */ | |
| 185 | function stream_eof() | |
| 186 | { | |
| 187 | if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) { | |
| 188 | return true; | |
| 189 | } | |
| 190 | ||
| 191 | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; | |
| 192 | $result = $db->datatype->_endOfLOB($db->datatype->lobs[$this->lob_index]); | |
| 193 | if (version_compare(phpversion(), "5.0", ">=") | |
| 194 | && version_compare(phpversion(), "5.1", "<") | |
| 195 | ) { | |
| 196 | return !$result; | |
| 197 | } | |
| 198 | return $result; | |
| 199 | } | |
| 200 | // }}} | |
| 201 | ||
| 202 | // {{{ stream_seek() | |
| 203 | ||
| 204 | /** | |
| 205 | * Seek stream, not implemented | |
| 206 | * | |
| 207 | * @param int offset | |
| 208 | * @param int whence | |
| 209 | * | |
| 210 | * @return bool | |
| 211 | * @access public | |
| 212 | */ | |
| 213 | function stream_seek($offset, $whence) | |
| 214 | { | |
| 215 | return false; | |
| 216 | } | |
| 217 | // }}} | |
| 218 | ||
| 219 | // {{{ stream_stat() | |
| 220 | ||
| 221 | /** | |
| 222 | * return information about stream | |
| 223 | * | |
| 224 | * @access public | |
| 225 | */ | |
| 226 | function stream_stat() | |
| 227 | { | |
| 228 | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { | |
| 229 | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; | |
| 230 | return array( | |
| 231 | 'db_index' => $this->db_index, | |
| 232 | 'lob_index' => $this->lob_index, | |
| 233 | ); | |
| 234 | } | |
| 235 | } | |
| 236 | // }}} | |
| 237 | ||
| 238 | // {{{ stream_close() | |
| 239 | ||
| 240 | /** | |
| 241 | * close stream | |
| 242 | * | |
| 243 | * @access public | |
| 244 | */ | |
| 245 | function stream_close() | |
| 246 | { | |
| 247 | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { | |
| 248 | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; | |
| 249 | if (isset($db->datatype->lobs[$this->lob_index])) { | |
| 250 | $db->datatype->_destroyLOB($db->datatype->lobs[$this->lob_index]); | |
| 251 | unset($db->datatype->lobs[$this->lob_index]); | |
| 252 | } | |
| 253 | } | |
| 254 | } | |
| 255 | // }}} | |
| 256 | } | |
| 257 | ||
| 258 | // register streams wrapper | |
| 259 | if (!stream_wrapper_register("MDB2LOB", "MDB2_LOB")) { | |
| 260 | MDB2::raiseError(); | |
| 261 | return false; | |
| 262 | } | |
| 263 | ||
| 264 | ?> | |
