mdw@git.distorted.org.uk Git - qmail/blob - str_diffn.c

   1 #include "str.h"
   2
   3 int str_diffn(s,t,len)
   4 register char *s;
   5 register char *t;
   6 unsigned int len;
   7 {
   8   register char x;
   9
  10   for (;;) {
  11     if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
  12     if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
  13     if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
  14     if (!len--) return 0; x = *s; if (x != *t) break; if (!x) break; ++s; ++t;
  15   }
  16   return ((int)(unsigned int)(unsigned char) x)
  17        - ((int)(unsigned int)(unsigned char) *t);
  18 }