<?php
/*
V5.18 3 Sep 2012 (c) 2000-2012 John Lim (jlim#natsoft.com). All rights reserved.
Contributed by Ross Smith ([email protected]).
Released under both BSD license and Lesser GPL library license.
Whenever there is any discrepancy between the two licenses,
the BSD license will take precedence.
Set tabs to 4 for best viewing.
*/
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) $min_length;
}
/**
*/
function ADODB_Compress_Bzip2($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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