/*
* Compare n bytes: s1>s2: >0 s1==s2: 0 s1<s2: <0
*/
int
memcmp(s1, s2, n)
register char *s1, *s2;
register int n;
{
int diff;
if (s1 != s2)
while (--n >= 0)
if (diff = *s1++ - *s2++)
return (diff);
return (0);
}