[Sommaire] [Imprimer]

   1  <?php
   2  
   3  /*
   4  V4.90 8 June 2006  (c) 2000-2006 John Lim (jlim#natsoft.com.my). 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 {
  21      /**
  22       */
  23      var $_block_size = null;
  24  
  25      /**
  26       */
  27      var $_work_level = null;
  28  
  29      /**
  30       */
  31      var $_min_length = 1;
  32  
  33      /**
  34       */
  35  	function getBlockSize() {
  36          return $this->_block_size;
  37      }
  38  
  39      /**
  40       */
  41  	function setBlockSize($block_size) {
  42          assert('$block_size >= 1');
  43          assert('$block_size <= 9');
  44          $this->_block_size = (int) $block_size;
  45      }
  46  
  47      /**
  48       */
  49  	function getWorkLevel() {
  50          return $this->_work_level;
  51      }
  52  
  53      /**
  54       */
  55  	function setWorkLevel($work_level) {
  56          assert('$work_level >= 0');
  57          assert('$work_level <= 250');
  58          $this->_work_level = (int) $work_level;
  59      }
  60  
  61      /**
  62       */
  63  	function getMinLength() {
  64          return $this->_min_length;
  65      }
  66  
  67      /**
  68       */
  69  	function setMinLength($min_length) {
  70          assert('$min_length >= 0');
  71          $this->_min_length = (int) $min_length;
  72      }
  73  
  74      /**
  75       */
  76  	function ADODB_Compress_Bzip2($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  
  90      /**
  91       */
  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  
 108      /**
 109       */
 110  	function read($data, $key) {
 111          return $data ? bzdecompress($data) : $data;
 112      }
 113  
 114  }
 115  
 116  return 1;
 117  
 118  ?>