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<?php
/**
* ADOdb Session Management
*
* This file is part of ADOdb, a Database Abstraction Layer library for PHP.
*
* @package ADOdb
* @link https://adodb.org Project's web site and documentation
* @link https://github.com/ADOdb/ADOdb Source code and issue tracker
*
* The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
* and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
* any later version. This means you can use it in proprietary products.
* See the LICENSE.md file distributed with this source code for details.
* @license BSD-3-Clause
* @license LGPL-2.1-or-later
*
* @copyright 2000-2013 John Lim
* @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community
* @author Ross Smith <adodb@netebb.com>
*/
if (!function_exists('bzcompress')) {
trigger_error('bzip2 functions are not available', E_USER_ERROR);
return 0;
}
/**
*/
class ADODB_Compress_Bzip2 {
/**
*/
var $_block_size = null;
/**
*/
var $_work_level = null;
/**
*/
var $_min_length = 1;
/**
*/
function getBlockSize() {
return $this->_block_size;
}
/**
*/
function setBlockSize($block_size) {
assert($block_size >= 1);
assert($block_size <= 9);
$this->_block_size = (int) $block_size;
}
/**
*/
function getWorkLevel() {
return $this->_work_level;
}
/**
*/
function setWorkLevel($work_level) {
assert($work_level >= 0);
assert($work_level <= 250);
$this->_work_level = (int) $work_level;
}
/**
*/
function getMinLength() {
return $this->_min_length;
}
/**
*/
function setMinLength($min_length) {
assert($min_length >= 0);
$this->_min_length = (int) $min_length;
}
/**
*/
function __construct($block_size = null, $work_level = null, $min_length = null) {
if (!is_null($block_size)) {
$this->setBlockSize($block_size);
}
if (!is_null($work_level)) {
$this->setWorkLevel($work_level);
}
if (!is_null($min_length)) {
$this->setMinLength($min_length);
}
}
/**
*/
function write($data, $key) {
if (strlen($data) < $this->_min_length) {
return $data;
}
if (!is_null($this->_block_size)) {
if (!is_null($this->_work_level)) {
return bzcompress($data, $this->_block_size, $this->_work_level);
} else {
return bzcompress($data, $this->_block_size);
}
}
return bzcompress($data);
}
/**
*/
function read($data, $key) {
return $data ? bzdecompress($data) : $data;
}
}
return 1;
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