1/* public domain rewrite of memcmp(3) */
2
3#include "ruby/missing.h"
4#include <stddef.h>
5
6int
7memcmp(const void *s1, const void *s2, size_t len)
8{
9    register unsigned char *a = (unsigned char*)s1;
10    register unsigned char *b = (unsigned char*)s2;
11    register int tmp;
12
13    for (; len; --len) {
14	if (tmp = *a++ - *b++)
15	    return tmp;
16    }
17    return 0;
18}
19