ref: b76f84cbe3982b71357c727c208401d6645ecad3
dir: /memcmp.c/
/*
jbig2dec
Copyright (C) 2001-2005 Artifex Software, Inc.
This software is distributed under license and may not
be copied, modified or distributed except as expressly
authorized under the terms of the license contained in
the file LICENSE in this distribution.
For further licensing information refer to http://artifex.com/ or
contact Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134,
San Rafael, CA 94903, U.S.A., +1(415)492-9861.
*/
#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 -1 or 1
* depending on the relative magnitude of the first differing elements,
* considered as unsigned chars
*/
int memcmp(const void *b1, const void *b2, size_t len)
{
unsigned char *a, *b;
size_t i;
a = (unsigned char *)b1;
b = (unsigned char *)b2;
for(i = 0; i < len; i++) {
if (*a != *b) {
/* strings differ */
return (*a < *b) ? -1 : 1;
}
a++;
b++;
}
/* strings match */
return 0;
}