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lvm2/lib/misc/crc_gen.c
Alasdair Kergon b91a077d23 was renamed
2010-09-27 19:10:46 +00:00

48 lines
1.0 KiB
C

/*
* Copyright (C) 2010 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Helper program to generate table included in crc.c.
*/
#include "lib.h"
int main(int argc, char **argv)
{
uint32_t crc, i, j;
printf("\t/* CRC-32 byte lookup table generated by crc_gen.c */\n");
printf("\tstatic const uint32_t crctab[] = {");
for (i = 0; i < 256; i++) {
crc = i;
for (j = 0; j < 8; j++) {
if (crc & 1)
crc = 0xedb88320L ^ (crc >> 1);
else
crc = crc >> 1;
}
if (i % 8)
printf(" ");
else
printf("\n\t\t");
printf("0x%08.8x,", crc);
}
printf("\n\t};\n");
return 0;
}