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<?php
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB 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@backendmedia.com> |
// +----------------------------------------------------------------------+
//
// $Id: LOB.php,v 1.30.4.1 2004/01/08 13:43:03 lsmith Exp $
//
if(!defined('MDB_LOB_INCLUDED'))
{
define('MDB_LOB_INCLUDED', 1);
/**
* MDB Large Object (BLOB/CLOB) classes
*
* @package MDB
* @category Database
* @access private
* @author Lukas Smith <smith@backendmedia.com>
*/
class MDB_LOB
{
var $database;
var $lob;
var $data = '';
var $position = 0;
function create(&$arguments)
{
if(isset($arguments['Data'])) {
$this->data = $arguments['Data'];
}
return(MDB_OK);
}
function destroy()
{
$this->data = '';
}
function endOfLob()
{
return($this->position >= strlen($this->data));
}
function readLob(&$data, $length)
{
$length = min($length, strlen($this->data) - $this->position);
$data = substr($this->data, $this->position, $length);
$this->position += $length;
return($length);
}
};
class MDB_LOB_Result extends MDB_LOB
{
var $result_lob = 0;
function create(&$arguments)
{
if(!isset($arguments['ResultLOB'])) {
return(PEAR::raiseError(NULL, MDB_ERROR_NEED_MORE_DATA, NULL, NULL,
'it was not specified a result Lob identifier',
'MDB_Error', TRUE));
}
$this->result_lob = $arguments['ResultLOB'];
return(MDB_OK);
}
function destroy()
{
$this->database->_destroyResultLob($this->result_lob);
}
function endOfLob()
{
return($this->database->endOfResultLob($this->result_lob));
}
function readLob(&$data, $length)
{
$read_length = $this->database->_readResultLob($this->result_lob, $data, $length);
if (MDB::isError($read_length)) {
return($read_length);
}
if($read_length < 0) {
return(PEAR::raiseError(NULL, MDB_ERROR_INVALID, NULL, NULL,
'data was read beyond end of data source',
'MDB_Error', TRUE));
}
return($read_length);
}
};
class MDB_LOB_Input_File extends MDB_LOB
{
var $file = 0;
var $opened_file = 0;
function create(&$arguments)
{
if(isset($arguments['File'])) {
if(intval($arguments['File']) == 0) {
return(PEAR::raiseError(NULL, MDB_ERROR_INVALID, NULL, NULL,
'it was specified an invalid input file identifier',
'MDB_Error', TRUE));
}
$this->file = $arguments['File'];
}
else
{
if(isset($arguments['FileName'])) {
if((!$this->file = fopen($arguments['FileName'], 'rb'))) {
return(PEAR::raiseError(NULL, MDB_ERROR_NOT_FOUND, NULL, NULL,
'could not open specified input file ("'.$arguments['FileName'].'")',
'MDB_Error', TRUE));
}
$this->opened_file = 1;
} else {
return(PEAR::raiseError(NULL, MDB_ERROR_NEED_MORE_DATA, NULL, NULL,
'it was not specified the input file',
'MDB_Error', TRUE));
}
}
return(MDB_OK);
}
function destroy()
{
if($this->opened_file) {
fclose($this->file);
$this->file = 0;
$this->opened_file = 0;
}
}
function endOfLob() {
return(feof($this->file));
}
function readLob(&$data, $length)
{
if(gettype($data = @fread($this->file, $length))!= 'string') {
return(PEAR::raiseError(NULL, MDB_ERROR, NULL, NULL,
'could not read from the input file',
'MDB_Error', TRUE));
}
return(strlen($data));
}
};
class MDB_LOB_Output_File extends MDB_LOB
{
var $file = 0;
var $opened_file = 0;
var $input_lob = 0;
var $opened_lob = 0;
var $buffer_length = 8000;
function create(&$arguments)
{
if(isset($arguments['BufferLength'])) {
if($arguments['BufferLength'] <= 0) {
return(PEAR::raiseError(NULL, MDB_ERROR_INVALID, NULL, NULL,
'it was specified an invalid buffer length',
'MDB_Error', TRUE));
}
$this->buffer_length = $arguments['BufferLength'];
}
if(isset($arguments['File'])) {
if(intval($arguments['File']) == 0) {
return(PEAR::raiseError(NULL, MDB_ERROR_INVALID, NULL, NULL,
'it was specified an invalid output file identifier',
'MDB_Error', TRUE));
}
$this->file = $arguments['File'];
} else {
if(isset($arguments['FileName'])) {
if((!$this->file = fopen($arguments['FileName'],'wb'))) {
return(PEAR::raiseError(NULL, MDB_ERROR_NOT_FOUND, NULL, NULL,
'could not open specified output file ("'.$arguments['FileName'].'")',
'MDB_Error', TRUE));
}
$this->opened_file = 1;
} else {
return(PEAR::raiseError(NULL, MDB_ERROR_NEED_MORE_DATA, NULL, NULL,
'it was not specified the output file',
'MDB_Error', TRUE));
}
}
if(isset($arguments['LOB'])) {
if(!is_object($arguments['LOB'])) {
$this->destroy();
return(PEAR::raiseError(NULL, MDB_ERROR_INVALID, NULL, NULL,
'it was specified an invalid input large object identifier',
'MDB_Error', TRUE));
}
$this->input_lob = $arguments['LOB'];
} else {
if($this->database
&& isset($arguments['Result'])
&& isset($arguments['Row'])
&& isset($arguments['Field'])
&& isset($arguments['Binary']))
{
if($arguments['Binary']) {
$this->input_lob = $this->database->fetchBlob($arguments['Result'],
$arguments['Row'], $arguments['Field']);
} else {
$this->input_lob = $this->database->fetchClob($arguments['Result'],
$arguments['Row'], $arguments['Field']);
}
if($this->input_lob == 0) {
$this->destroy();
return(PEAR::raiseError(NULL, MDB_ERROR, NULL, NULL,
'could not fetch the input result large object',
'MDB_Error', TRUE));
}
$this->opened_lob = 1;
} else {
$this->destroy();
return(PEAR::raiseError(NULL, MDB_ERROR_NEED_MORE_DATA, NULL, NULL,
'it was not specified the input large object identifier',
'MDB_Error', TRUE));
}
}
return(MDB_OK);
}
function destroy()
{
if($this->opened_file) {
fclose($this->file);
$this->opened_file = 0;
$this->file = 0;
}
if($this->opened_lob) {
$this->database->destroyLob($this->input_lob);
$this->input_lob = 0;
$this->opened_lob = 0;
}
}
function endOfLob()
{
return($this->database->endOfLob($this->input_lob));
}
function readLob(&$data, $length) {
$buffer_length = ($length == 0 ? $this->buffer_length : $length);
$written_full = 0;
do {
for($written = 0;
!$this->database->endOfLob($this->input_lob)
&& $written < $buffer_length;
$written += $read)
{
if(MDB::isError($result = $this->database->
readLob($this->input_lob, $buffer, $buffer_length)))
{
return($result);
}
$read = strlen($buffer);
if(@fwrite($this->file, $buffer, $read)!= $read) {
return(PEAR::raiseError(NULL, MDB_ERROR, NULL, NULL,
'could not write to the output file',
'MDB_Error', TRUE));
}
}
$written_full += $written;
} while($length == 0 && !$this->database->endOfLob($this->input_lob));
return($written_full);
}
}
};
?>
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