source: Dev/trunk/rdfapi/util/adodb/session/adodb-compress-bzip2.php @ 12

<?php

/*
V4.94 23 Jan 2007  (c) 2000-2007 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;

?>