18 size_t strlen(const char *str)  in strlen()  argument
20   const char *start = str;  in strlen()
23   while (*str++)  in strlen()
25   return str - start - 1;  in strlen()
27   if (__builtin_expect ((uintptr_t)str & (sizeof (long) - 1), 0)) do  in strlen()
29       char ch = *str;  in strlen()
30       str++;  in strlen()
32 	return str - start - 1;  in strlen()
33     } while ((uintptr_t)str & (sizeof (long) - 1));  in strlen()
35   unsigned long *ls = (unsigned long *)str;  in strlen()
40   str = (const char *)ls;  in strlen()
41   size_t ret = str - start, sl = sizeof (long);  in strlen()
43   char c0 = str[0 - sl], c1 = str[1 - sl], c2 = str[2 - sl], c3 = str[3 - sl];  in strlen()
49   c0 = str[4 - sl], c1 = str[5 - sl], c2 = str[6 - sl], c3 = str[7 - sl];  in strlen()