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/*
* Copyright (C) 2007
* pancake <pancake@youterm.com>
*
* 0xFFFF is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 0xFFFF is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0xFFFF; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdio.h>
#include "hash.h"
usho do_hash(usho *b, int len)
{
usho result = 0;
for(len>>=1;len--;b=b+1)
result^=b[0];
return result;
}
usho do_hash_file(char *filename)
{
unsigned char buf[BSIZE];
FILE *fd = fopen(filename, "r");
usho hash = 0;
int ret;
if (fd == NULL) {
fprintf(stderr, "ERROR: File '%s' not found.\n", filename);
return -1;
}
do { ret = fread(&buf, 1, BSIZE, fd);
if (ret == -1)
return 0;
hash ^= do_hash((usho *)&buf, ret);
} while(ret);
fclose(fd);
return hash;
}
#if 0
main()
{
usho us = do_hash_file("zImage");
unsigned char *h= (unsigned char *)&us;
printf("%x %x\n",h[0],h[1]);
}
#endif
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