1 #include "case.h"

     2 

     3 int case_diffb(s,len,t)

     4 register char *s;

     5 unsigned int len;

     6 register char *t;

     7 {

     8   register unsigned char x;

     9   register unsigned char y;

    10 

    11   while (len > 0) {

    12     --len;

    13     x = *s++ - 'A';

    14     if (x <= 'Z' - 'A') x += 'a'; else x += 'A';

    15     y = *t++ - 'A';

    16     if (y <= 'Z' - 'A') y += 'a'; else y += 'A';

    17     if (x != y)

    18       return ((int)(unsigned int) x) - ((int)(unsigned int) y);

    19   }

    20   return 0;

    21 }