ref: 22881a46c322b45b34e20b9270e825dbe5c2c1a1
dir: /memcmp.c/
/*
jbig2dec
Copyright (C) 2001-2002 artofcode LLC.
This program 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.
$Id: memcmp.c,v 1.1 2002/08/05 17:10:44 giles Exp $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stddef.h>
/* replacement for broken memcmp() */
/*
* compares two byte strings 'a' and 'b', both assumed to be 'len' bytes long
* returns zero if the two strings are identical, otherwise returns the difference
* between the values of the first two differing bytes, considered as unsigned chars
*/
int memcmp(const void *b1, const void *b2, size_t len)
{
unsigned char *a, *b;
unsigned char c;
size_t i;
a = (unsigned char *)b1;
b = (unsigned char *)b2;
for(i = 0; i < len; i++) {
c = *a - *b;
if (c) return (int)c; /* strings differ */
a++;
b++;
}
return 0; /* strings match */
}