Function relativePosition

string.go:11–18

(pos, length int)

)

func relativePosition(pos, length int) int {
	if pos >= 0 {
		return pos
	} else if -pos > length {
		return 0
	}
	return length + pos + 1
}

func findHelper(l *State, isFind bool) int {
	s, p := CheckString(l, 1), CheckString(l, 2)