[6779] | 1 | <?php |
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| 2 | |
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| 3 | |
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| 4 | /* |
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| 5 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
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| 6 | Contributed by Ross Smith (adodb@netebb.com). |
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| 7 | Released under both BSD license and Lesser GPL library license. |
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| 8 | Whenever there is any discrepancy between the two licenses, |
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| 9 | the BSD license will take precedence. |
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| 10 | Set tabs to 4 for best viewing. |
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| 11 | |
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| 12 | */ |
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| 13 | |
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| 14 | if (!function_exists('gzcompress')) { |
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| 15 | trigger_error('gzip functions are not available', E_USER_ERROR); |
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| 16 | return 0; |
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| 17 | } |
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| 18 | |
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| 19 | /* |
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| 20 | */ |
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| 21 | class ADODB_Compress_Gzip { |
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| 22 | /** |
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| 23 | */ |
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| 24 | var $_level = null; |
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| 25 | |
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| 26 | /** |
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| 27 | */ |
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| 28 | var $_min_length = 1; |
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| 29 | |
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| 30 | /** |
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| 31 | */ |
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| 32 | function getLevel() { |
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| 33 | return $this->_level; |
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| 34 | } |
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| 35 | |
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| 36 | /** |
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| 37 | */ |
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| 38 | function setLevel($level) { |
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| 39 | assert('$level >= 0'); |
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| 40 | assert('$level <= 9'); |
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| 41 | $this->_level = (int) $level; |
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| 42 | } |
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| 43 | |
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| 44 | /** |
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| 45 | */ |
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| 46 | function getMinLength() { |
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| 47 | return $this->_min_length; |
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| 48 | } |
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| 49 | |
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| 50 | /** |
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| 51 | */ |
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| 52 | function setMinLength($min_length) { |
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| 53 | assert('$min_length >= 0'); |
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| 54 | $this->_min_length = (int) $min_length; |
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| 55 | } |
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| 56 | |
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| 57 | /** |
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| 58 | */ |
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| 59 | function ADODB_Compress_Gzip($level = null, $min_length = null) { |
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| 60 | if (!is_null($level)) { |
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| 61 | $this->setLevel($level); |
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| 62 | } |
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| 63 | |
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| 64 | if (!is_null($min_length)) { |
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| 65 | $this->setMinLength($min_length); |
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| 66 | } |
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| 67 | } |
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| 68 | |
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| 69 | /** |
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| 70 | */ |
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| 71 | function write($data, $key) { |
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| 72 | if (strlen($data) < $this->_min_length) { |
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| 73 | return $data; |
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| 74 | } |
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| 75 | |
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| 76 | if (!is_null($this->_level)) { |
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| 77 | return gzcompress($data, $this->_level); |
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| 78 | } else { |
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| 79 | return gzcompress($data); |
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| 80 | } |
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| 81 | } |
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| 82 | |
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| 83 | /** |
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| 84 | */ |
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| 85 | function read($data, $key) { |
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| 86 | return $data ? gzuncompress($data) : $data; |
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| 87 | } |
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| 88 | |
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| 89 | } |
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| 90 | |
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| 91 | return 1; |
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| 92 | |
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| 93 | ?> |
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