private static bool TryFetchPacket(RingQueue <IncomingPacket> packetQueue, out IncomingPacket packet)
{
if (packetQueue.Count <= 0)
{
packet = null; return(false);
}
int take = 0;
int takeLen = 0;
bool hasStart = false;
bool hasEnd = false;
for (int i = 0; i < packetQueue.Count; i++)
{
IncomingPacket peekPacket;
if (packetQueue.TryPeekStart(i, out peekPacket))
{
take++;
takeLen += peekPacket.Size;
if (peekPacket.FragmentedFlag)
{
if (!hasStart)
{
hasStart = true;
}
else if (!hasEnd)
{
hasEnd = true; break;
}
}
else
{
if (!hasStart)
{
hasStart = true; hasEnd = true; break;
}
}
}
else
{
break;
}
}
if (!hasStart || !hasEnd)
{
packet = null; return(false);
}
// GET
if (!packetQueue.TryDequeue(out packet))
{
throw new InvalidOperationException("Packet in queue got missing (?)");
}
if (take > 1) // MERGE
{
var preFinalArray = new byte[takeLen];
// for loop at 0th element
int curCopyPos = packet.Size;
Array.Copy(packet.Data, 0, preFinalArray, 0, packet.Size);
for (int i = 1; i < take; i++)
{
IncomingPacket nextPacket = null;
if (!packetQueue.TryDequeue(out nextPacket))
{
throw new InvalidOperationException("Packet in queue got missing (?)");
}
Array.Copy(nextPacket.Data, 0, preFinalArray, curCopyPos, nextPacket.Size);
curCopyPos += nextPacket.Size;
}
packet.Data = preFinalArray;
}
// DECOMPRESS
if (packet.CompressedFlag)
{
if (QuickLZ.SizeDecompressed(packet.Data) > MaxDecompressedSize)
{
throw new InvalidOperationException("Compressed packet is too large");
}
packet.Data = QuickLZ.Decompress(packet.Data);
}
return(true);
}
