size_t
strlen(const char *s){
	size_t r;

	for(r = 0; s[r] != '\0'; ++r);

	return r;
}

size_t
strnlen(const char *s, size_t maxlen){
	size_t r;

	for(r = 0; s[r] != '\0' && r < maxlen; ++r);

	return r;
}