ead02c079162c85f3299526d79a7a938dd7e7036
[Packages/TYPO3.CMS.git] / typo3 / sysext / adodb / adodb / session / adodb-compress-gzip.php
1 <?php
2
3
4 /*
5 V4.93 10 Oct 2006 (c) 2000-2006 John Lim (jlim#natsoft.com.my). All rights reserved.
6 Contributed by Ross Smith (adodb@netebb.com).
7 Released under both BSD license and Lesser GPL library license.
8 Whenever there is any discrepancy between the two licenses,
9 the BSD license will take precedence.
10 Set tabs to 4 for best viewing.
11
12 */
13
14 if (!function_exists('gzcompress')) {
15 trigger_error('gzip functions are not available', E_USER_ERROR);
16 return 0;
17 }
18
19 /*
20 */
21 class ADODB_Compress_Gzip {
22 /**
23 */
24 var $_level = null;
25
26 /**
27 */
28 var $_min_length = 1;
29
30 /**
31 */
32 function getLevel() {
33 return $this->_level;
34 }
35
36 /**
37 */
38 function setLevel($level) {
39 assert('$level >= 0');
40 assert('$level <= 9');
41 $this->_level = (int) $level;
42 }
43
44 /**
45 */
46 function getMinLength() {
47 return $this->_min_length;
48 }
49
50 /**
51 */
52 function setMinLength($min_length) {
53 assert('$min_length >= 0');
54 $this->_min_length = (int) $min_length;
55 }
56
57 /**
58 */
59 function ADODB_Compress_Gzip($level = null, $min_length = null) {
60 if (!is_null($level)) {
61 $this->setLevel($level);
62 }
63
64 if (!is_null($min_length)) {
65 $this->setMinLength($min_length);
66 }
67 }
68
69 /**
70 */
71 function write($data, $key) {
72 if (strlen($data) < $this->_min_length) {
73 return $data;
74 }
75
76 if (!is_null($this->_level)) {
77 return gzcompress($data, $this->_level);
78 } else {
79 return gzcompress($data);
80 }
81 }
82
83 /**
84 */
85 function read($data, $key) {
86 return $data ? gzuncompress($data) : $data;
87 }
88
89 }
90
91 return 1;
92
93 ?>