265 lines
8.1 KiB
PHP
265 lines
8.1 KiB
PHP
|
<?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,v 1.34 2006/10/25 11:52:21 lsmith Exp $
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @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;
|
||
|
|
}
|
||
|
|
|
||
|
|
?>
|