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