public object[] ReadPackets(byte[] data, int offset, int count)
{
var temp = _datas.ToList();
temp.Add(new ArraySegment <byte>(data, offset, count));
var totalCount = ArraySegmentStream.GetLeftCount(temp.ToArray(), 0, 0);
if (totalCount < 4)
{
var currentBytes = data.Skip(offset).Take(count).ToArray();
temp[temp.Count - 1] = new ArraySegment <byte>(currentBytes);
_datas = temp;
return(null);
}
_bufferStream.Reset(temp.ToArray());
var packets = new List <object>();
while (true)
{
var lengthBytes = new byte[4];
var savePosition = _bufferStream.Position;
var readLength = _bufferStream.Read(lengthBytes, 0, 4);
_bufferStream.Position = savePosition;
if (readLength < 4)
{
var currentBytes = data
.Skip(offset + _bufferStream.SegmentPosition)
.Take(count - _bufferStream.SegmentPosition)
.ToArray();
temp = temp.Skip(_bufferStream.SegmentIndex).ToList();
temp[temp.Count - 1] = new ArraySegment <byte>(currentBytes);
_datas = temp;
return(packets.ToArray());
}
var packetLength = BitConverter.ToInt32(lengthBytes, 0);
if (packetLength > MaxPacketLength)
{
throw new InvalidDataException("packet excced max length");
}
var leftCount = _bufferStream.Length - _bufferStream.Position;
if (leftCount < packetLength + 4) //no enough bytes
{
var currentBytes = data
.Skip(offset + _bufferStream.SegmentPosition)
.Take(count - _bufferStream.SegmentPosition)
.ToArray();
temp = temp.Skip(_bufferStream.SegmentIndex).ToList();
temp[temp.Count - 1] = new ArraySegment <byte>(currentBytes);
_datas = temp;
return(packets.ToArray());
}
_bufferStream.Read(lengthBytes, 0, 4);
var pb = _packetFactory.Deseriaize(_bufferStream, packetLength);
packets.Add(pb);
if (_bufferStream.Length == _bufferStream.Position) //all byte read
{
_datas.Clear();
return(packets.ToArray());
}
//var usedDataLength = _bufferStream.Position;
}
}
