public ReplayHeader ParseReplayHeader(byte[] totalReplayBytes, out int currIndex)
{
currIndex = 0;
byte[] replayHeaderBytes = totalReplayBytes.SubArray(0, HEADER_SIZE);
ReplayHeader parsedReplayHeader = new ReplayHeader(replayHeaderBytes);
//Check if the replay file starts with the expected header string of "Warcraft III recorded game"
byte[] replayStartHeader = replayHeaderBytes.SubArray(0, REPLAY_HEADER_ST_BYTES.Length);
if (!replayStartHeader.SequenceEqual(REPLAY_HEADER_ST_BYTES))
{
throw new InvalidDataException(String.Format(ERROR_INVALID_HEADER_START_STRING, Encoding.UTF8.GetString(replayStartHeader)));
}
currIndex += REPLAY_HEADER_ST_BYTES.Length; //Move 26 characters forward
//Get file offset
uint replayFileOffset = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
if (replayFileOffset != FILE_OFFSET_FIRST_COMPRESSED_DATA_BLOCK)
{
throw new InvalidDataException(String.Format(ERROR_INVALID_REPLAY_FILE_OFFSET,
BitConverter.ToString(BitConverter.GetBytes(replayFileOffset))));
}
currIndex += 4;
//Get overall size of compressed file
uint compressedFileSize = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
parsedReplayHeader.CompressedFileSize = compressedFileSize;
currIndex += 4;
//Get replay version
uint replayHeaderVersion = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
if (replayHeaderVersion != SUPPORTED_REPLAY_HEADER_VERSION)
{
throw new InvalidDataException(String.Format(ERROR_INVALID_REPLAY_HEADER_VERSION,
BitConverter.ToString(BitConverter.GetBytes(replayHeaderVersion))));
}
currIndex += 4;
//Get overall size of decompressed file
uint decompressedFileSize = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
parsedReplayHeader.DecompressedFileSize = decompressedFileSize;
currIndex += 4;
//Get total number of compressed data blocks in file
uint compressedDataBlockCount = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
parsedReplayHeader.CompressedDataBlockCount = (int)compressedDataBlockCount;
currIndex += 4;
//Start SubHeaderParsing (Version 1)
//Get version identifier (Classic, TFT)
string clientType = ByteUtility.ReadDoubleWordString(replayHeaderBytes, currIndex);
if (clientType != SUPPORTED_WC3_CLIENT_TYPE)
{
throw new InvalidDataException(String.Format(ERROR_INVALID_REPLAY_CLIENT_TYPE, clientType));
}
currIndex += 4;
//Get Client Version Number
string replayVersion = ByteUtility.ReadDoubleWordString(replayHeaderBytes, currIndex);
double replayVersionValue = 0;
Double.TryParse(replayVersion, out replayVersionValue);
//For some reason, replays generated by GHost doesn't follow the standard replay format
//This part is commented out until I figure out what's going on
//if (replayVersionValue < 1.0 && replayVersionValue > 2.0)
//{
// throw new InvalidDataException(String.Format(ERROR_INVALID_REPLAY_VERSION, replayVersion));
//}
parsedReplayHeader.ReplayVersion = replayVersion;
currIndex += 4;
ushort buildNumber = ByteUtility.ReadWord(replayHeaderBytes, currIndex);
parsedReplayHeader.BuildNumber = buildNumber;
currIndex += 2;
ushort flag = ByteUtility.ReadWord(replayHeaderBytes, currIndex);
if (flag != FLAG_MULTIPLAYER)
{
//throw new InvalidDataException(String.Format(ERROR_INVALID_GAME_TYPE, BitConverter.ToString(BitConverter.GetBytes(flag))));
}
currIndex += 2;
uint replayLength = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
parsedReplayHeader.ReplayLength = replayLength;
currIndex += 4;
uint checksum = ByteUtility.ReadDoubleWord(replayHeaderBytes, currIndex);
parsedReplayHeader.CRC32 = checksum;
currIndex += 4;
return(parsedReplayHeader);
}