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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