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36 kaklik 1 
<?php
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/*
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V4.80 8 Mar 2006  (c) 2000-2006 John Lim (jlim@natsoft.com.my). All rights reserved.
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         Contributed by Ross Smith (adodb@netebb.com).
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  Released under both BSD license and Lesser GPL library license.
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  Whenever there is any discrepancy between the two licenses,
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  the BSD license will take precedence.
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	  Set tabs to 4 for best viewing.
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*/
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if (!function_exists('bzcompress')) {
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	trigger_error('bzip2 functions are not available', E_USER_ERROR);
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	return 0;
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}
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/*
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*/
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class ADODB_Compress_Bzip2 {
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	/**
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	 */
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	var $_block_size = null;
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	/**
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	 */
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	var $_work_level = null;
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	/**
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	 */
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	var $_min_length = 1;
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	/**
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	 */
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	function getBlockSize() {
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		return $this->_block_size;
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	}
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	/**
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	 */
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	function setBlockSize($block_size) {
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		assert('$block_size >= 1');
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		assert('$block_size <= 9');
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		$this->_block_size = (int) $block_size;
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	}
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	/**
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	 */
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	function getWorkLevel() {
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		return $this->_work_level;
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	}
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	/**
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	 */
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	function setWorkLevel($work_level) {
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		assert('$work_level >= 0');
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		assert('$work_level <= 250');
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		$this->_work_level = (int) $work_level;
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	}
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	/**
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	 */
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	function getMinLength() {
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		return $this->_min_length;
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	}
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	/**
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	 */
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	function setMinLength($min_length) {
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		assert('$min_length >= 0');
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		$this->_min_length = (int) $min_length;
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	}
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	/**
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	 */
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	function ADODB_Compress_Bzip2($block_size = null, $work_level = null, $min_length = null) {
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		if (!is_null($block_size)) {
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			$this->setBlockSize($block_size);
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		}
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		if (!is_null($work_level)) {
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			$this->setWorkLevel($work_level);
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		}
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		if (!is_null($min_length)) {
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			$this->setMinLength($min_length);
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		}
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	}
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	/**
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	 */
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	function write($data, $key) {
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		if (strlen($data) < $this->_min_length) {
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			return $data;
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		}
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		if (!is_null($this->_block_size)) {
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			if (!is_null($this->_work_level)) {
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				return bzcompress($data, $this->_block_size, $this->_work_level);
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			} else {
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				return bzcompress($data, $this->_block_size);
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			}
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		}
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		return bzcompress($data);
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	}
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	/**
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	 */
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	function read($data, $key) {
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		return $data ? bzdecompress($data) : $data;
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	}
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}
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return 1;
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?>