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| | | // +----------------------------------------------------------------------+ |
| | | // | PHP version 5 | |
| | | // +----------------------------------------------------------------------+ |
| | | // | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, | |
| | | // | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, | |
| | | // | Stig. S. Bakken, Lukas Smith | |
| | | // | All rights reserved. | |
| | | // +----------------------------------------------------------------------+ |
| | |
| | | // | Author: Lukas Smith <smith@pooteeweet.org> | |
| | | // +----------------------------------------------------------------------+ |
| | | // |
| | | // $Id$ |
| | | // $Id: LOB.php 222350 2006-10-25 11:52:21Z lsmith $ |
| | | |
| | | /** |
| | | * @package MDB2 |
| | |
| | | |
| | | 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; |
| | | var $lob_index; |
| | | var $lob; |
| | | |
| | | /** |
| | | * 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 (!array_key_exists('host', $url) && !array_key_exists('user', $url)) { |
| | | if (empty($url['host'])) { |
| | | return false; |
| | | } |
| | | $this->db_index = $url['host']; |
| | | $this->db_index = (int)$url['host']; |
| | | if (!isset($GLOBALS['_MDB2_databases'][$this->db_index])) { |
| | | return false; |
| | | } |
| | | $db =& $GLOBALS['_MDB2_databases'][$this->db_index]; |
| | | $this->lob_index = $url['user']; |
| | | $this->lob_index = (int)$url['user']; |
| | | if (!isset($db->datatype->lobs[$this->lob_index])) { |
| | | return false; |
| | | } |
| | | $this->lob =& $db->datatype->lobs[$this->lob_index]; |
| | | $db->datatype->_retrieveLOB($this->lob); |
| | | 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 = $db->datatype->_readLOB($this->lob, $count); |
| | | $data = $db->datatype->_readLOB($db->datatype->lobs[$this->lob_index], $count); |
| | | $length = strlen($data); |
| | | if ($length == 0) { |
| | | $this->lob['endOfLOB'] = true; |
| | | $db->datatype->lobs[$this->lob_index]['endOfLOB'] = true; |
| | | } |
| | | $this->lob['position'] += $length; |
| | | $db->datatype->lobs[$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() |
| | | { |
| | | return $this->lob['position']; |
| | | if (isset($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 = $db->datatype->_endOfLOB($this->lob); |
| | | $result = $db->datatype->_endOfLOB($db->datatype->lobs[$this->lob_index]); |
| | | if (version_compare(phpversion(), "5.0", ">=") |
| | | && version_compare(phpversion(), "5.1", "<") |
| | | ) { |
| | |
| | | } |
| | | 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])) { |
| | | $db->datatype->_destroyLOB($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; |
| | | } |
| | | |
| | | ?> |
| | | ?> |