#include "str.h"

unsigned int str_len(s)
register char *s;
{
 register char *t;

 t = s;
 for (;;)
  {
   if (!*t) return t - s; ++t;
   if (!*t) return t - s; ++t;
   if (!*t) return t - s; ++t;
   if (!*t) return t - s; ++t;
  }
}