New file |
| | |
| | | <?php |
| | | // +----------------------------------------------------------------------+ |
| | | // | PHP version 5 | |
| | | // +----------------------------------------------------------------------+ |
| | | // | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, | |
| | | // | Stig. S. Bakken, Lukas Smith | |
| | | // | All rights reserved. | |
| | | // +----------------------------------------------------------------------+ |
| | | // | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB | |
| | | // | API as well as database abstraction for PHP applications. | |
| | | // | This LICENSE is in the BSD license style. | |
| | | // | | |
| | | // | Redistribution and use in source and binary forms, with or without | |
| | | // | modification, are permitted provided that the following conditions | |
| | | // | are met: | |
| | | // | | |
| | | // | Redistributions of source code must retain the above copyright | |
| | | // | notice, this list of conditions and the following disclaimer. | |
| | | // | | |
| | | // | Redistributions in binary form must reproduce the above copyright | |
| | | // | notice, this list of conditions and the following disclaimer in the | |
| | | // | documentation and/or other materials provided with the distribution. | |
| | | // | | |
| | | // | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, | |
| | | // | Lukas Smith nor the names of his contributors may be used to endorse | |
| | | // | or promote products derived from this software without specific prior| |
| | | // | written permission. | |
| | | // | | |
| | | // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| | | // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| | | // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| | | // | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| | | // | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| | | // | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
| | | // | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS| |
| | | // | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |
| | | // | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| | | // | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY| |
| | | // | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| | | // | POSSIBILITY OF SUCH DAMAGE. | |
| | | // +----------------------------------------------------------------------+ |
| | | // | Author: Lukas Smith <smith@pooteeweet.org> | |
| | | // +----------------------------------------------------------------------+ |
| | | // |
| | | // $Id: LOB.php 222350 2006-10-25 11:52:21Z lsmith $ |
| | | |
| | | /** |
| | | * @package MDB2 |
| | | * @category Database |
| | | * @author Lukas Smith <smith@pooteeweet.org> |
| | | */ |
| | | |
| | | require_once 'MDB2.php'; |
| | | |
| | | /** |
| | | * MDB2_LOB: user land stream wrapper implementation for LOB support |
| | | * |
| | | * @package MDB2 |
| | | * @category Database |
| | | * @author Lukas Smith <smith@pooteeweet.org> |
| | | */ |
| | | class MDB2_LOB |
| | | { |
| | | /** |
| | | * contains the key to the global MDB2 instance array of the associated |
| | | * MDB2 instance |
| | | * |
| | | * @var integer |
| | | * @access protected |
| | | */ |
| | | var $db_index; |
| | | |
| | | /** |
| | | * contains the key to the global MDB2_LOB instance array of the associated |
| | | * MDB2_LOB instance |
| | | * |
| | | * @var integer |
| | | * @access protected |
| | | */ |
| | | var $lob_index; |
| | | |
| | | // {{{ stream_open() |
| | | |
| | | /** |
| | | * open stream |
| | | * |
| | | * @param string specifies the URL that was passed to fopen() |
| | | * @param string the mode used to open the file |
| | | * @param int holds additional flags set by the streams API |
| | | * @param string not used |
| | | * |
| | | * @return bool |
| | | * @access public |
| | | */ |
| | | function stream_open($path, $mode, $options, &$opened_path) |
| | | { |
| | | if (!preg_match('/^rb?\+?$/', $mode)) { |
| | | return false; |
| | | } |
| | | $url = parse_url($path); |
| | | if (empty($url['host'])) { |
| | | return false; |
| | | } |
| | | $this->db_index = (int)$url['host']; |
| | | if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | return false; |
| | | } |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | $this->lob_index = (int)$url['user']; |
| | | if (!isset($db->datatype->lobs[$this->lob_index])) { |
| | | return false; |
| | | } |
| | | return true; |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_read() |
| | | |
| | | /** |
| | | * read stream |
| | | * |
| | | * @param int number of bytes to read |
| | | * |
| | | * @return string |
| | | * @access public |
| | | */ |
| | | function stream_read($count) |
| | | { |
| | | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | $db->datatype->_retrieveLOB($db->datatype->lobs[$this->lob_index]); |
| | | |
| | | $data = $db->datatype->_readLOB($db->datatype->lobs[$this->lob_index], $count); |
| | | $length = strlen($data); |
| | | if ($length == 0) { |
| | | $db->datatype->lobs[$this->lob_index]['endOfLOB'] = true; |
| | | } |
| | | $db->datatype->lobs[$this->lob_index]['position'] += $length; |
| | | return $data; |
| | | } |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_write() |
| | | |
| | | /** |
| | | * write stream, note implemented |
| | | * |
| | | * @param string data |
| | | * |
| | | * @return int |
| | | * @access public |
| | | */ |
| | | function stream_write($data) |
| | | { |
| | | return 0; |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_tell() |
| | | |
| | | /** |
| | | * return the current position |
| | | * |
| | | * @return int current position |
| | | * @access public |
| | | */ |
| | | function stream_tell() |
| | | { |
| | | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | return $db->datatype->lobs[$this->lob_index]['position']; |
| | | } |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_eof() |
| | | |
| | | /** |
| | | * Check if stream reaches EOF |
| | | * |
| | | * @return bool |
| | | * @access public |
| | | */ |
| | | function stream_eof() |
| | | { |
| | | if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | return true; |
| | | } |
| | | |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | $result = $db->datatype->_endOfLOB($db->datatype->lobs[$this->lob_index]); |
| | | if (version_compare(phpversion(), "5.0", ">=") |
| | | && version_compare(phpversion(), "5.1", "<") |
| | | ) { |
| | | return !$result; |
| | | } |
| | | return $result; |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_seek() |
| | | |
| | | /** |
| | | * Seek stream, not implemented |
| | | * |
| | | * @param int offset |
| | | * @param int whence |
| | | * |
| | | * @return bool |
| | | * @access public |
| | | */ |
| | | function stream_seek($offset, $whence) |
| | | { |
| | | return false; |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_stat() |
| | | |
| | | /** |
| | | * return information about stream |
| | | * |
| | | * @access public |
| | | */ |
| | | function stream_stat() |
| | | { |
| | | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | return array( |
| | | 'db_index' => $this->db_index, |
| | | 'lob_index' => $this->lob_index, |
| | | ); |
| | | } |
| | | } |
| | | // }}} |
| | | |
| | | // {{{ stream_close() |
| | | |
| | | /** |
| | | * close stream |
| | | * |
| | | * @access public |
| | | */ |
| | | function stream_close() |
| | | { |
| | | if (isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | if (isset($db->datatype->lobs[$this->lob_index])) { |
| | | $db->datatype->_destroyLOB($db->datatype->lobs[$this->lob_index]); |
| | | unset($db->datatype->lobs[$this->lob_index]); |
| | | } |
| | | } |
| | | } |
| | | // }}} |
| | | } |
| | | |
| | | // register streams wrapper |
| | | if (!stream_wrapper_register("MDB2LOB", "MDB2_LOB")) { |
| | | MDB2::raiseError(); |
| | | return false; |
| | | } |
| | | |
| | | ?> |