Function rounded

postgres/parser/duration/duration.go:162–171

rounded returns nanos rounded to the nearest microsecond.

(nanos int64)

// rounded returns nanos rounded to the nearest microsecond.
func rounded(nanos int64) int64 {
	dur := time.Duration(nanos) * time.Nanosecond
	v := dur.Round(time.Microsecond).Nanoseconds()
	// Near the boundaries of int64 will return the argument unchanged. Check
	// for those cases and truncate instead of round so that we never have nanos.
	if m := v % nanosInMicro; m != 0 {
		v -= m
	}
	return v
}

// Compare returns an integer representing the relative length of two Durations.
// The result will be 0 if d==x, -1 if d < x, and +1 if d > x.