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