GitSharp.Core.Transport.UploadPack.Negotiate C# (CSharp) Method

        private void Negotiate()
        {
            string lastName = string.Empty;

            while (true)
            {
                string line = _pckIn.ReadString();

                if (line.Length == 0)
                {
                    if (_commonBase.Count == 0 || _multiAck)
                    {
                        _pckOut.WriteString("NAK\n");
                    }
                    _pckOut.Flush();
                }
                else if (line.StartsWith("have ") && line.Length == 45)
                {
                    string name = line.Substring(5);
                    ObjectId id = ObjectId.FromString(name);
                    if (MatchHave(id))
                    {
                        if (_multiAck)
                        {
                            lastName = name;
                            _pckOut.WriteString("ACK " + name + " continue\n");
                        }
                        else if (_commonBase.Count == 1)
                        {
                            _pckOut.WriteString("ACK " + name + "\n");
                        }
                    }
                    else
                    {
                        if (_multiAck && OkToGiveUp())
                        {
                            _pckOut.WriteString("ACK " + name + " continue\n");
                        }
                    }
                }
                else if (line.Equals("done"))
                {
                    if (_commonBase.Count == 0)
                    {
                        _pckOut.WriteString("NAK\n");
                    }
                    else if (_multiAck)
                    {
                        _pckOut.WriteString("ACK " + lastName + "\n");
                    }

                    break;
                }
                else
                {
                    throw new PackProtocolException("expected have; got " + line);
                }
            }
        }