package time

func ForceAndroidTzdataForTest() (undo func()) {
	allowGorootSource = false
	origLoadFromEmbeddedTZData := loadFromEmbeddedTZData
	loadFromEmbeddedTZData = nil

	return func() {
		allowGorootSource = true
		loadFromEmbeddedTZData = origLoadFromEmbeddedTZData
	}

	if len(s) < 2 {
		return 0
	}
	return int(s[0]) | int(s[1])<<8
}

// loadFromEmbeddedTZData returns the contents of the file with the given
// name in an uncompressed zip file, where the contents of the file can
// be found in embeddedTzdata.
// This is similar to time.loadTzinfoFromZip.
func loadFromEmbeddedTZData(name string) (string, error) {
	const (
		zecheader = 0x06054b50
		zcheader  = 0x02014b50

	NextStdChunk           = nextStdChunk
	Tzset                  = tzset
	TzsetName              = tzsetName
	TzsetOffset            = tzsetOffset
)

func LoadFromEmbeddedTZData(zone string) (string, error) {
	return loadFromEmbeddedTZData(zone)
}

type RuleKind int

const (
	RuleJulian       = RuleKind(ruleJulian)
	RuleDOY          = RuleKind(ruleDOY)
	RuleMonthWeekDay = RuleKind(ruleMonthWeekDay)

	for _, zone := range zones {
		ref, err := time.LoadLocation(zone)
		if err != nil {
			t.Errorf("LoadLocation(%q): %v", zone, err)
			continue
		}

		embedded, err := time.LoadFromEmbeddedTZData(zone)
		if err != nil {
			t.Errorf("LoadFromEmbeddedTZData(%q): %v", zone, err)
			continue
		}
		sample, err := time.LoadLocationFromTZData(zone, []byte(embedded))
		if err != nil {

func registerLoadFromEmbeddedTZData(f func(string) (string, error)) {
	loadFromEmbeddedTZData = f
}

// loadFromEmbeddedTZData is used to load a specific tzdata file
// from tzdata information embedded in the binary itself.
// This is set when the time/tzdata package is imported,
// via registerLoadFromEmbeddedTzdata.
var loadFromEmbeddedTZData func(zipname string) (string, error)