Mono.Terminal.LineEditor.History.Append C# (CSharp) Метод

            public void Append(string s)
            {
                //Console.WriteLine ("APPENDING {0} head={1} tail={2}", s, head, tail);
                history[head] = s;
                head = (head + 1) % history.Length;
                if (head == tail)
                    tail = (tail + 1 % history.Length);
                if (count != history.Length)
                    count++;
                //Console.WriteLine ("DONE: head={1} tail={2}", s, head, tail);
            }