<?php
// ------------------------------------------------------------------------- //
// Calcul d'un CRC32 en PHP3. //
// ------------------------------------------------------------------------- //
// Auteur: Cyril Cogordan //
// Email: cyril.cogordan@lankhor.com //
// Web: //
// ------------------------------------------------------------------------- //
function calc_crc32($buf) {
$crc = 0;
$len = strlen($buf);
$crc_table = array(
0x00,0x00,0x00,0x00, 0x77,0x07,0x30,0x96, 0xee,0x0e,0x61,0x2c,
0x99,0x09,0x51,0xba, 0x07,0x6d,0xc4,0x19, 0x70,0x6a,0xf4,0x8f,
0xe9,0x63,0xa5,0x35, 0x9e,0x64,0x95,0xa3, 0x0e,0xdb,0x88,0x32,
0x79,0xdc,0xb8,0xa4, 0xe0,0xd5,0xe9,0x1e, 0x97,0xd2,0xd9,0x88,
0x09,0xb6,0x4c,0x2b, 0x7e,0xb1,0x7c,0xbd, 0xe7,0xb8,0x2d,0x07,
0x90,0xbf,0x1d,0x91, 0x1d,0xb7,0x10,0x64, 0x6a,0xb0,0x20,0xf2,
0xf3,0xb9,0x71,0x48, 0x84,0xbe,0x41,0xde, 0x1a,0xda,0xd4,0x7d,
0x6d,0xdd,0xe4,0xeb, 0xf4,0xd4,0xb5,0x51, 0x83,0xd3,0x85,0xc7,
0x13,0x6c,0x98,0x56, 0x64,0x6b,0xa8,0xc0, 0xfd,0x62,0xf9,0x7a,
0x8a,0x65,0xc9,0xec, 0x14,0x01,0x5c,0x4f, 0x63,0x06,0x6c,0xd9,
0xfa,0x0f,0x3d,0x63, 0x8d,0x08,0x0d,0xf5, 0x3b,0x6e,0x20,0xc8,
0x4c,0x69,0x10,0x5e, 0xd5,0x60,0x41,0xe4, 0xa2,0x67,0x71,0x72,
0x3c,0x03,0xe4,0xd1, 0x4b,0x04,0xd4,0x47, 0xd2,0x0d,0x85,0xfd,
0xa5,0x0a,0xb5,0x6b, 0x35,0xb5,0xa8,0xfa, 0x42,0xb2,0x98,0x6c,
0xdb,0xbb,0xc9,0xd6, 0xac,0xbc,0xf9,0x40, 0x32,0xd8,0x6c,0xe3,
0x45,0xdf,0x5c,0x75, 0xdc,0xd6,0x0d,0xcf, 0xab,0xd1,0x3d,0x59,
0x26,0xd9,0x30,0xac, 0x51,0xde,0x00,0x3a, 0xc8,0xd7,0x51,0x80,
0xbf,0xd0,0x61,0x16, 0x21,0xb4,0xf4,0xb5, 0x56,0xb3,0xc4,0x23,
0xcf,0xba,0x95,0x99, 0xb8,0xbd,0xa5,0x0f, 0x28,0x02,0xb8,0x9e,
0x5f,0x05,0x88,0x08, 0xc6,0x0c,0xd9,0xb2, 0xb1,0x0b,0xe9,0x24,
0x2f,0x6f,0x7c,0x87, 0x58,0x68,0x4c,0x11, 0xc1,0x61,0x1d,0xab,
0xb6,0x66,0x2d,0x3d, 0x76,0xdc,0x41,0x90, 0x01,0xdb,0x71,0x06,
0x98,0xd2,0x20,0xbc, 0xef,0xd5,0x10,0x2a, 0x71,0xb1,0x85,0x89,
0x06,0xb6,0xb5,0x1f, 0x9f,0xbf,0xe4,0xa5, 0xe8,0xb8,0xd4,0x33,
0x78,0x07,0xc9,0xa2, 0x0f,0x00,0xf9,0x34, 0x96,0x09,0xa8,0x8e,
0xe1,0x0e,0x98,0x18, 0x7f,0x6a,0x0d,0xbb, 0x08,0x6d,0x3d,0x2d,
0x91,0x64,0x6c,0x97, 0xe6,0x63,0x5c,0x01, 0x6b,0x6b,0x51,0xf4,
0x1c,0x6c,0x61,0x62, 0x85,0x65,0x30,0xd8, 0xf2,0x62,0x00,0x4e,
0x6c,0x06,0x95,0xed, 0x1b,0x01,0xa5,0x7b, 0x82,0x08,0xf4,0xc1,
0xf5,0x0f,0xc4,0x57, 0x65,0xb0,0xd9,0xc6, 0x12,0xb7,0xe9,0x50,
0x8b,0xbe,0xb8,0xea, 0xfc,0xb9,0x88,0x7c, 0x62,0xdd,0x1d,0xdf,
0x15,0xda,0x2d,0x49, 0x8c,0xd3,0x7c,0xf3, 0xfb,0xd4,0x4c,0x65,
0x4d,0xb2,0x61,0x58, 0x3a,0xb5,0x51,0xce, 0xa3,0xbc,0x00,0x74,
0xd4,0xbb,0x30,0xe2, 0x4a,0xdf,0xa5,0x41, 0x3d,0xd8,0x95,0xd7,
0xa4,0xd1,0xc4,0x6d, 0xd3,0xd6,0xf4,0xfb, 0x43,0x69,0xe9,0x6a,
0x34,0x6e,0xd9,0xfc, 0xad,0x67,0x88,0x46, 0xda,0x60,0xb8,0xd0,
0x44,0x04,0x2d,0x73, 0x33,0x03,0x1d,0xe5, 0xaa,0x0a,0x4c,0x5f,
0xdd,0x0d,0x7c,0xc9, 0x50,0x05,0x71,0x3c, 0x27,0x02,0x41,0xaa,
0xbe,0x0b,0x10,0x10, 0xc9,0x0c,0x20,0x86, 0x57,0x68,0xb5,0x25,
0x20,0x6f,0x85,0xb3, 0xb9,0x66,0xd4,0x09, 0xce,0x61,0xe4,0x9f,
0x5e,0xde,0xf9,0x0e, 0x29,0xd9,0xc9,0x98, 0xb0,0xd0,0x98,0x22,
0xc7,0xd7,0xa8,0xb4, 0x59,0xb3,0x3d,0x17, 0x2e,0xb4,0x0d,0x81,
0xb7,0xbd,0x5c,0x3b, 0xc0,0xba,0x6c,0xad, 0xed,0xb8,0x83,0x20,
0x9a,0xbf,0xb3,0xb6, 0x03,0xb6,0xe2,0x0c, 0x74,0xb1,0xd2,0x9a,
0xea,0xd5,0x47,0x39, 0x9d,0xd2,0x77,0xaf, 0x04,0xdb,0x26,0x15,
0x73,0xdc,0x16,0x83, 0xe3,0x63,0x0b,0x12, 0x94,0x64,0x3b,0x84,
0x0d,0x6d,0x6a,0x3e, 0x7a,0x6a,0x5a,0xa8, 0xe4,0x0e,0xcf,0x0b,
0x93,0x09,0xff,0x9d, 0x0a,0x00,0xae,0x27, 0x7d,0x07,0x9e,0xb1,
0xf0,0x0f,0x93,0x44, 0x87,0x08,0xa3,0xd2, 0x1e,0x01,0xf2,0x68,
0x69,0x06,0xc2,0xfe, 0xf7,0x62,0x57,0x5d, 0x80,0x65,0x67,0xcb,
0x19,0x6c,0x36,0x71, 0x6e,0x6b,0x06,0xe7, 0xfe,0xd4,0x1b,0x76,
0x89,0xd3,0x2b,0xe0, 0x10,0xda,0x7a,0x5a, 0x67,0xdd,0x4a,0xcc,
0xf9,0xb9,0xdf,0x6f, 0x8e,0xbe,0xef,0xf9, 0x17,0xb7,0xbe,0x43,
0x60,0xb0,0x8e,0xd5, 0xd6,0xd6,0xa3,0xe8, 0xa1,0xd1,0x93,0x7e,
0x38,0xd8,0xc2,0xc4, 0x4f,0xdf,0xf2,0x52, 0xd1,0xbb,0x67,0xf1,
0xa6,0xbc,0x57,0x67, 0x3f,0xb5,0x06,0xdd, 0x48,0xb2,0x36,0x4b,
0xd8,0x0d,0x2b,0xda, 0xaf,0x0a,0x1b,0x4c, 0x36,0x03,0x4a,0xf6,
0x41,0x04,0x7a,0x60, 0xdf,0x60,0xef,0xc3, 0xa8,0x67,0xdf,0x55,
0x31,0x6e,0x8e,0xef, 0x46,0x69,0xbe,0x79, 0xcb,0x61,0xb3,0x8c,
0xbc,0x66,0x83,0x1a, 0x25,0x6f,0xd2,0xa0, 0x52,0x68,0xe2,0x36,
0xcc,0x0c,0x77,0x95, 0xbb,0x0b,0x47,0x03, 0x22,0x02,0x16,0xb9,
0x55,0x05,0x26,0x2f, 0xc5,0xba,0x3b,0xbe, 0xb2,0xbd,0x0b,0x28,
0x2b,0xb4,0x5a,0x92, 0x5c,0xb3,0x6a,0x04, 0xc2,0xd7,0xff,0xa7,
0xb5,0xd0,0xcf,0x31, 0x2c,0xd9,0x9e,0x8b, 0x5b,0xde,0xae,0x1d,
0x9b,0x64,0xc2,0xb0, 0xec,0x63,0xf2,0x26, 0x75,0x6a,0xa3,0x9c,
0x02,0x6d,0x93,0x0a, 0x9c,0x09,0x06,0xa9, 0xeb,0x0e,0x36,0x3f,
0x72,0x07,0x67,0x85, 0x05,0x00,0x57,0x13, 0x95,0xbf,0x4a,0x82,
0xe2,0xb8,0x7a,0x14, 0x7b,0xb1,0x2b,0xae, 0x0c,0xb6,0x1b,0x38,
0x92,0xd2,0x8e,0x9b, 0xe5,0xd5,0xbe,0x0d, 0x7c,0xdc,0xef,0xb7,
0x0b,0xdb,0xdf,0x21, 0x86,0xd3,0xd2,0xd4, 0xf1,0xd4,0xe2,0x42,
0x68,0xdd,0xb3,0xf8, 0x1f,0xda,0x83,0x6e, 0x81,0xbe,0x16,0xcd,
0xf6,0xb9,0x26,0x5b, 0x6f,0xb0,0x77,0xe1, 0x18,0xb7,0x47,0x77,
0x88,0x08,0x5a,0xe6, 0xff,0x0f,0x6a,0x70, 0x66,0x06,0x3b,0xca,
0x11,0x01,0x0b,0x5c, 0x8f,0x65,0x9e,0xff, 0xf8,0x62,0xae,0x69,
0x61,0x6b,0xff,0xd3, 0x16,0x6c,0xcf,0x45, 0xa0,0x0a,0xe2,0x78,
0xd7,0x0d,0xd2,0xee, 0x4e,0x04,0x83,0x54, 0x39,0x03,0xb3,0xc2,
0xa7,0x67,0x26,0x61, 0xd0,0x60,0x16,0xf7, 0x49,0x69,0x47,0x4d,
0x3e,0x6e,0x77,0xdb, 0xae,0xd1,0x6a,0x4a, 0xd9,0xd6,0x5a,0xdc,
0x40,0xdf,0x0b,0x66, 0x37,0xd8,0x3b,0xf0, 0xa9,0xbc,0xae,0x53,
0xde,0xbb,0x9e,0xc5, 0x47,0xb2,0xcf,0x7f, 0x30,0xb5,0xff,0xe9,
0xbd,0xbd,0xf2,0x1c, 0xca,0xba,0xc2,0x8a, 0x53,0xb3,0x93,0x30,
0x24,0xb4,0xa3,0xa6, 0xba,0xd0,0x36,0x05, 0xcd,0xd7,0x06,0x93,
0x54,0xde,0x57,0x29, 0x23,0xd9,0x67,0xbf, 0xb3,0x66,0x7a,0x2e,
0xc4,0x61,0x4a,0xb8, 0x5d,0x68,0x1b,0x02, 0x2a,0x6f,0x2b,0x94,
0xb4,0x0b,0xbe,0x37, 0xc3,0x0c,0x8e,0xa1, 0x5a,0x05,0xdf,0x1b,
0x2d,0x02,0xef,0x8d);
$crc = $crc ^ -1;
$ptb = 0;
if ($len) {
do {
$offcrc = (($crc ^ ord($buf[$ptb++])) & 255) * 4;
$crcval = ($crc_table[$offcrc]<<24)+($crc_table[($offcrc+1)]<<16) +
($crc_table[($offcrc+2)]<<8)+($crc_table[($offcrc+3)]);
$crc = $crcval ^ (($crc >> 8) & 0xffffff);
} while (--$len);
}
return ($crc ^ -1);
}
?>