package reader

// ORPIndex calculates the approximate optimal recognition
// point of a word.
//
// The returned value is a zero-based rune index.
func ORPIndex(runes []rune) int {
	length := len(runes)

	switch {
	case length <= 1:
		return 0
	case length <= 5:
		return 1
	case length <= 9:
		return 2
	default:
		return 3
	}
}