case_diffb.c

   1 #include "case.h"
   2
   3 int case_diffb(register const char *s,register unsigned int len,register const char *t)
   4 {
   5   register unsigned char x;
   6   register unsigned char y;
   7
   8   while (len > 0) {
   9     --len;
  10     x = *s++ - 'A';
  11     if (x <= 'Z' - 'A') x += 'a'; else x += 'A';
  12     y = *t++ - 'A';
  13     if (y <= 'Z' - 'A') y += 'a'; else y += 'A';
  14     if (x != y)
  15       return ((int)(unsigned int) x) - ((int)(unsigned int) y);
  16   }
  17   return 0;
  18 }