public void ParseGameDataMessages(Byte[] frameData, Function <Byte, Byte> userMessageCallback)
{
Int64 gameDataStartOffset = fileStream.Position - frameData.Length;
// read game data frame into memory
bitBuffer = new BitBuffer(frameData);
readingGameData = true;
try
{
BeginMessageLog(gameDataStartOffset, frameData);
// start parsing messages
while (true)
{
Int32 messageFrameOffset = bitBuffer.CurrentByte;
Byte messageId = bitBuffer.ReadByte();
String messageName = Enum.GetName(typeof(MessageId), messageId);
if (messageName == null) // a user message, presumably
{
messageName = FindMessageIdString(messageId);
}
LogMessage(messageId, messageName, messageFrameOffset);
MessageHandler messageHandler = FindMessageHandler(messageId);
// Handle the conversion of user message id's.
// Used by demo writing to convert to the current network protocol.
if (messageId > 64 && userMessageCallback != null)
{
Byte newMessageId = userMessageCallback(messageId);
if (newMessageId != messageId)
{
// write the new id to the bitbuffer
bitBuffer.SeekBytes(-1);
bitBuffer.RemoveBytes(1);
bitBuffer.InsertBytes(new Byte[] { newMessageId });
}
}
// unknown message
if (messageHandler == null)
{
throw new ApplicationException(String.Format("Cannot find message handler for message id \"[{0}] {1}\"", messageId, messageName));
}
// callback takes priority over length
if (messageHandler.Callback != null)
{
messageHandler.Callback();
}
else if (messageHandler.Length != -1)
{
Seek(messageHandler.Length);
}
else
{
// user messages
if (messageId >= 64)
{
// All non-engine user messages start with a byte that is the number of bytes in the message remaining.
Byte length = bitBuffer.ReadByte();
Seek(length);
}
else
{
throw new ApplicationException(String.Format("Unknown message id \"{0}\"", messageId));
}
}
// Check if we've reached the end of the frame, or if any of the messages have called SkipGameDataFrame (readingGameData will be false).
if (bitBuffer.CurrentByte == bitBuffer.Length || !readingGameData)
{
break;
}
}
}
finally
{
readingGameData = false;
}
}
