1 #include "byte.h"

     2 

     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 }