You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.1 KiB
118 lines
2.1 KiB
<?php
|
|
|
|
/*
|
|
V4.01 23 Oct 2003 (c) 2000-2005 John Lim (jlim@natsoft.com.my). All rights reserved.
|
|
Contributed by Ross Smith (adodb@netebb.com).
|
|
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;
|
|
|
|
?>
|
|
|