Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /home/clients/a38b86744e455b1f2e763fe46170a4c9/web/jebulle.net/sources/classes/geshi.php on line 2013
.: Codulle : Source de OMcrc32.php :.

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Accueil>> AlBulle >> Albulle1.0rc4 >> core >> includes >> classes >> OMzip

Informations fichier

Nom du fichier : OMcrc32.php
Taille du fichier : 2 Ko (73 lignes)
Language : PHP

  1. <?php
  2. /*
  3. * CRC32 calculation for big files : avoids loading whole file in RAM
  4. *
  5. * Author/Copyright : Olivier MATHERET
  6. * matheret@free.fr http://matheret.free.fr
  7. * Licenced under CeCILL2
  8. *
  9. * Based on :
  10. * Reverse CRC adapted from "Reversing CRC – Theory and Practice"
  11. * HU Berlin Public Report
  12. * Martin Stigge, Henryk Plotz, Wolf Muller, Jens-Peter Redlich
  13. *
  14. */
  15. /**
  16. * Gives 4 bytes so that it afterwards will compute to the given crc
  17. *
  18. * This function uses the method of the multiplication with (x^N)^ -1.
  19. */
  20. function crc_reverse ( $crc )
  21. {
  22. $crc ^= 0xffffffff ;
  23.  
  24. // calculate crc except for the last 4 bytes ; this is essentially crc32 ()*/
  25. $crcreg = 0xffffffff ;
  26.  
  27. // calculate new content bits
  28. // new_content = tcrcreg * CRCINV mod CRCPOLY
  29. $new_content = 0;
  30. for ($i = 0; $i < 32; ++$i) {
  31. // reduce modulo CRCPOLY
  32. if ( $new_content & 1) {
  33. $new_content = ( ($new_content >> 1) & 0x7fffffff) ^ 0xedb88320 ;
  34. } else {
  35. $new_content = ($new_content >> 1) & 0x7fffffff;
  36. }
  37. // add CRCINV if corresponding bit of operand is set
  38. if ( $crc & 1) {
  39. $new_content ^= 0x5B358FD3 ;
  40. }
  41. $crc = ($crc >> 1) & 0x7fffffff;
  42. }
  43.  
  44. $new_content ^= 0xffffffff;
  45. // return new content
  46. $buffer = "";
  47. for ($i = 0; $i < 4; ++$i)
  48. $buffer .= chr($new_content >> ($i*8) & 0xFF) ;
  49. return $buffer;
  50. }
  51. /* Calculates the CRC32 of the given file without loading the file in RAM at once */
  52. function crc32_file($name) {
  53. $sizeToRead = @filesize($name);
  54. if(($fp=fopen($name,'rb'))===false) return 0;
  55.  
  56. $crcR = "";
  57. $crc = 0;
  58. while ($sizeToRead)
  59. {
  60. $buf = $crcR . @fread($fp, min($sizeToRead,1048576));
  61. $sizeToRead -= min($sizeToRead,1048576);
  62. $crc = crc32($buf);
  63. if ($sizeToRead)
  64. $crcR = crc_reverse($crc);
  65. }
  66. @fclose($fp);
  67. return $crc;
  68. }
  69. ?>

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