simple_strntoull
return simple_strntoull(cp, endp, base, INT_MAX);
return simple_strntoull(cp, endp, base, max_chars);
return -simple_strntoull(cp + 1, endp, base, max_chars - 1);
return simple_strntoull(cp, endp, base, max_chars);
val.u = simple_strntoull(str, &next, base,