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crc32.h
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crc32.h
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// ANSI C CRC32 calculation.
// Written by Ilya O. levin, [email protected]
//
// usage example:
//
// #include <fcntl.h>
// #include <sys/stat.h>
// #include <stdlib.h>
// #include "crc32.h"
//
// int main(int argc, char *argv[])
// {
// char buf[32000];
// long rc, fhn;
// unsigned long crc, i;
//
// if (argc<2) return (1);
//
// fhn=open(argv[1], O_RDONLY|O_BINARY,0);
// if (fhn!=-1)
// {
// printf("%s - ", argv[1]);
// INIT_CRC32(crc);
// while (!eof(fhn))
// {
// rc=read(fhn, &buf, sizeof(buf));
// for(i=0; i<rc; i++) CALC_CRC32(crc, buf[i]);
// }
// DONE_CRC32(crc);
// close(fhn);
// printf("%08X\n", crc);
// }
// return 0;
// }
//
typedef unsigned long TCRC32;
#define INIT_CRC32(crc) {crc = 0xFFFFFFFFL;}
#define CALC_CRC32(crc,y) {crc = ((crc>>8) & 0x00FFFFFFL) ^ crc32tbl[ (crc^y) & 0xFF ];}
#define DONE_CRC32(crc) {crc = crc^0xFFFFFFFFL;}
static TCRC32 crc32tbl[256]={0x0L,
0x77073096L, 0xee0e612cL, 0x990951baL, 0x76dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0xedb8832L,
0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x9b64c2bL,
0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L, 0x1db71064L,
0x6ab020f2L, 0xf3b97148L, 0x84be41deL, 0x1adad47dL,
0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL,
0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L,
0x4c69105eL, 0xd56041e4L, 0xa2677172L, 0x3c03e4d1L,
0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, 0x35b5a8faL,
0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL,
0x51de003aL, 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L,
0x56b3c423L, 0xcfba9599L, 0xb8bda50fL, 0x2802b89eL,
0x5f058808L, 0xc60cd9b2L, 0xb10be924L, 0x2f6f7c87L,
0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L,
0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L,
0x0f00f934L, 0x9609a88eL, 0xe10e9818L, 0x7f6a0dbbL,
0x086d3d2dL, 0x91646c97L, 0xe6635c01L, 0x6b6b51f4L,
0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L,
0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL,
0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L, 0x4db26158L,
0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, 0x4adfa541L,
0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L,
0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL,
0x270241aaL, 0xbe0b1010L, 0xc90c2086L, 0x5768b525L,
0x206f85b3L, 0xb966d409L, 0xce61e49fL, 0x5edef90eL,
0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L,
0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL, 0xead54739L,
0x9dd277afL, 0x04db2615L, 0x73dc1683L, 0xe3630b12L,
0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, 0xe40ecf0bL,
0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL,
0x806567cbL, 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L,
0x89d32be0L, 0x10da7a5aL, 0x67dd4accL, 0xf9b9df6fL,
0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, 0xd6d6a3e8L,
0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL,
0xaf0a1b4cL, 0x36034af6L, 0x41047a60L, 0xdf60efc3L,
0xa867df55L, 0x316e8eefL, 0x4669be79L, 0xcb61b38cL,
0xbc66831aL, 0x256fd2a0L, 0x5268e236L, 0xcc0c7795L,
0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L,
0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L,
0xec63f226L, 0x756aa39cL, 0x026d930aL, 0x9c0906a9L,
0xeb0e363fL, 0x72076785L, 0x05005713L, 0x95bf4a82L,
0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L,
0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL,
0xf6b9265bL, 0x6fb077e1L, 0x18b74777L, 0x88085ae6L,
0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, 0x8f659effL,
0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L,
0xd06016f7L, 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL,
0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L, 0xa9bcae53L,
0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, 0xbdbdf21cL,
0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL,
0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L,
0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL };