1 #include "byte.h"
2 
byte_diff(s,n,t)3 int byte_diff(s,n,t)
4 register char *s;
5 register unsigned int n;
6 register char *t;
7 {
8   for (;;) {
9     if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
10     if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
11     if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
12     if (!n) return 0; if (*s != *t) break; ++s; ++t; --n;
13   }
14   return ((int)(unsigned int)(unsigned char) *s)
15        - ((int)(unsigned int)(unsigned char) *t);
16 }
17