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- <?php
-
- /*
- V4.63 17 May 2005 (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;
-
- ?>
-