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