C#

byte b0=GetByte(); // after these four commands
byte b1=GetByte(); // b0, b1, b2, b3 have values
byte b2=GetByte(); // 
byte b3=GetByte(); //
int vr= + b1;
if ((b0<<8+b1)==0x4F42)
{
    int length;
    if (littleEndian)
       length=(b3<<24) + (b2<<16) + (b1<<8) + b0;
    else
       length=(b0<<24) + (b1<<16) + (b2<<8) + b3;
} 

John Simmons / outlaw programmer wrote:

and it's absolutely tits

Pete O'Hanlon wrote:

We use it to hive off our Tcp processing, and it just works

private void PacketReceivedCallback(IAsyncResult result)
{
    IOClient client = (IOClient)result.AsyncState;

    int bytesRead = client.Socket.EndReceive(result);

    if (bytesRead != 0)
    {
        lock (clientLock)
        {
            StringBuilder sb = new StringBuilder();

            if (client.IncompleatePacket.Length > 0)
            {
                sb = client.IncompleatePacket;
            }

            foreach (byte CurrentByte in client.ReadBuffer)
            {
                if (CurrentByte == EmptyByte)
                {
                    continue;
                }

                if (CurrentByte == PacketTerminator)
                {
                    PacketReceived(client, sb.ToString());
                    bytesReceived += sb.ToString().Length;

                    BroadcastPacket(sb.ToString(), client);

                    sb = new StringBuilder();
                    client.IncompleatePacket = new StringBuilder();
                }

                if (CurrentByte != EmptyByte && CurrentByte != PacketTerminator)
                {
                    sb.Append((char)CurrentByte);
                }
            }

            if (sb.Length > 0)
            {
                client.IncompleatePacket.Append(sb.ToString());
            }
        }
        client.Socket.BeginReceive(client.ReadBuffer, 0, client.ReadBuffer.Length, SocketFlags.None, 
                                   new AsyncCallback(PacketReceivedCallback), client);
    }
    else
    {
        CloseConnection(client);
    }
}