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adodb-compress-bzip2.php
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1 <?php
2 
3 /*
4 V5.19 23-Apr-2014 (c) 2000-2014 John Lim (jlim#natsoft.com). All rights reserved.
5  Contributed by Ross Smith (adodb@netebb.com).
6  Released under both BSD license and Lesser GPL library license.
7  Whenever there is any discrepancy between the two licenses,
8  the BSD license will take precedence.
9  Set tabs to 4 for best viewing.
10 
11 */
12 
13 if (!function_exists('bzcompress')) {
14  trigger_error('bzip2 functions are not available', E_USER_ERROR);
15  return 0;
16 }
17 
18 /*
19 */
20 class ADODB_Compress_Bzip2 {
23  var $_block_size = null;
24 
27  var $_work_level = null;
28 
31  var $_min_length = 1;
32 
35  function getBlockSize() {
36  return $this->_block_size;
37  }
38 
41  function setBlockSize($block_size) {
42  assert('$block_size >= 1');
43  assert('$block_size <= 9');
44  $this->_block_size = (int) $block_size;
45  }
46 
49  function getWorkLevel() {
50  return $this->_work_level;
51  }
52 
55  function setWorkLevel($work_level) {
56  assert('$work_level >= 0');
57  assert('$work_level <= 250');
58  $this->_work_level = (int) $work_level;
59  }
60 
63  function getMinLength() {
64  return $this->_min_length;
65  }
66 
69  function setMinLength($min_length) {
70  assert('$min_length >= 0');
71  $this->_min_length = (int) $min_length;
72  }
73 
76  function ADODB_Compress_Bzip2($block_size = null, $work_level = null, $min_length = null) {
77  if (!is_null($block_size)) {
78  $this->setBlockSize($block_size);
79  }
80 
81  if (!is_null($work_level)) {
82  $this->setWorkLevel($work_level);
83  }
84 
85  if (!is_null($min_length)) {
86  $this->setMinLength($min_length);
87  }
88  }
89 
92  function write($data, $key) {
93  if (strlen($data) < $this->_min_length) {
94  return $data;
95  }
96 
97  if (!is_null($this->_block_size)) {
98  if (!is_null($this->_work_level)) {
99  return bzcompress($data, $this->_block_size, $this->_work_level);
100  } else {
101  return bzcompress($data, $this->_block_size);
102  }
103  }
104 
105  return bzcompress($data);
106  }
107 
110  function read($data, $key) {
111  return $data ? bzdecompress($data) : $data;
112  }
113 
114 }
115 
116 return 1;
ADODB_Compress_Bzip2\$_block_size
$_block_size
Definition: adodb-compress-bzip2.php:23
ADODB_Compress_Bzip2\setMinLength
setMinLength($min_length)
Definition: adodb-compress-bzip2.php:69
E_USER_ERROR
if(!defined('ADODB_ERROR_HANDLER_TYPE')) define('ADODB_ERROR_HANDLER_TYPE' E_USER_ERROR
Definition: adodb-errorhandler.inc.php:16
ADODB_Compress_Bzip2\getBlockSize
getBlockSize()
Definition: adodb-compress-bzip2.php:35
ADODB_Compress_Bzip2\$_min_length
$_min_length
Definition: adodb-compress-bzip2.php:31
ADODB_Compress_Bzip2\read
read($data, $key)
Definition: adodb-compress-bzip2.php:110
ADODB_Compress_Bzip2\setBlockSize
setBlockSize($block_size)
Definition: adodb-compress-bzip2.php:41
ADODB_Compress_Bzip2\$_work_level
$_work_level
Definition: adodb-compress-bzip2.php:27
ADODB_Compress_Bzip2
Definition: adodb-compress-bzip2.php:20
ADODB_Compress_Bzip2\getWorkLevel
getWorkLevel()
Definition: adodb-compress-bzip2.php:49
ADODB_Compress_Bzip2\setWorkLevel
setWorkLevel($work_level)
Definition: adodb-compress-bzip2.php:55
ADODB_Compress_Bzip2\ADODB_Compress_Bzip2
ADODB_Compress_Bzip2($block_size=null, $work_level=null, $min_length=null)
Definition: adodb-compress-bzip2.php:76
ADODB_Compress_Bzip2\write
write($data, $key)
Definition: adodb-compress-bzip2.php:92
ADODB_Compress_Bzip2\getMinLength
getMinLength()
Definition: adodb-compress-bzip2.php:63