RuleMonthWeekDay = RuleKind(ruleMonthWeekDay)
	UnixToInternal   = unixToInternal
)

type Rule struct {
	Kind RuleKind
	Day  int
	Week int
	Mon  int
	Time int
}

func TzsetRule(s string) (Rule, string, bool) {
	r, rs, ok := tzsetRule(s)
	rr := Rule{
		Kind: RuleKind(r.kind),
		Day:  r.day,
		Week: r.week,
		Mon:  r.mon,
		Time: r.time,
	}
	return rr, rs, ok
}

	if s[0] != ',' && s[0] != ';' {
		return "", 0, 0, 0, false, false
	}
	s = s[1:]

	var startRule, endRule rule
	startRule, s, ok = tzsetRule(s)
	if !ok || len(s) == 0 || s[0] != ',' {
		return "", 0, 0, 0, false, false
	}
	s = s[1:]
	endRule, s, ok = tzsetRule(s)
	if !ok || len(s) > 0 {
		return "", 0, 0, 0, false, false
	}

		{"M4.5.7/03:00:00", time.Rule{}, "", false},
		{"M4.5.6/-04", time.Rule{Kind: time.RuleMonthWeekDay, Mon: 4, Week: 5, Day: 6, Time: -4 * 60 * 60}, "", true},
	} {
		r, out, ok := time.TzsetRule(test.in)
		if r != test.r || out != test.out || ok != test.ok {
			t.Errorf("tzsetName(%q) = %#v, %q, %t, want %#v, %q, %t", test.in, r, out, ok, test.r, test.out, test.ok)
		}
	}