uint FindFirstMatchingChunk(List <ChunkMetaData> chunksList, long chunk, byte hint)
{
uint idx;
for (idx = 0; idx < chunksList.Count; idx++)
{
if ((PackChunking.chunkCode(0, PackChunking.chunkToLen(chunksList[(int)idx].chunk)) == chunk) &&
(chunksList[(int)idx].hint == hint))
{
//LogUtility.LogUtility.LogFile(Convert.ToString(m_Id) + "match " + Convert.ToString(idx), ModuleLogLevel);
break;
}
}
return(idx);
}
void MatchChain(List <ChunkMetaData> predMsg)
{
try
{
uint matchLen = 0;
uint matchChunkCount = 0;
uint firstSenderIdx = 0;
uint firstReceiverIdx = 0;
int senderChunkIdx = 0;
int receiverChunkIdx = 0;
bool match = false;
int offset = 0;
int savedOffset = 0;
while ((senderChunkIdx < m_SenderChunkList.Count) && (receiverChunkIdx < predMsg.Count))
{
byte senderHint = PackChunking.GetChunkHint(m_data, (uint)offset, (uint)PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx]));
long senderChunk = PackChunking.chunkCode(0, PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx]));
switch (match)
{
case false:
LogUtility.LogUtility.LogFile(Convert.ToString(m_Id) + " in non-match " + Convert.ToString(PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx])), ModuleLogLevel);
receiverChunkIdx = (int)FindFirstMatchingChunk(predMsg, senderChunk, senderHint);
if (receiverChunkIdx != predMsg.Count)
{
LogUtility.LogUtility.LogFile(Convert.ToString(m_Id) + " match " + Convert.ToString(PackChunking.chunkToLen(predMsg[(int)receiverChunkIdx].chunk)), ModuleLogLevel);
match = true;
firstReceiverIdx = (uint)receiverChunkIdx;
firstSenderIdx = (uint)senderChunkIdx;
matchLen = (uint)PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx]);
matchChunkCount = 1;
savedOffset = offset;
receiverChunkIdx++;
}
else
{
receiverChunkIdx = 0;
}
break;
case true:
LogUtility.LogUtility.LogFile(Convert.ToString(m_Id) + "in match " + Convert.ToString(PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx])), ModuleLogLevel);
if ((senderChunk != PackChunking.chunkCode(0, PackChunking.chunkToLen(predMsg[receiverChunkIdx].chunk))) ||
(senderHint != predMsg[receiverChunkIdx].hint))
{
match = false;
LogUtility.LogUtility.LogFile(Convert.ToString(m_Id) + "stopped. matching sha1 ", ModuleLogLevel);
OnEndOfMatch(predMsg, matchLen, matchChunkCount, firstSenderIdx, firstReceiverIdx, savedOffset);
if (matchLen >= (m_data.Length / 3))
{
//return;
}
}
else
{
matchLen += (uint)PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx]);
matchChunkCount++;
receiverChunkIdx++;
if (senderChunkIdx == (m_SenderChunkList.Count - 1))
{
LogUtility.LogUtility.LogFile(Convert.ToString(m_Id) + "stopped (end). matching sha1 ", ModuleLogLevel);
OnEndOfMatch(predMsg, matchLen, matchChunkCount, firstSenderIdx, firstReceiverIdx, savedOffset);
if (matchLen >= (m_data.Length / 3))
{
//return;
}
}
}
break;
}
//LogUtility.LogUtility.LogFile("Sender's offset " + Convert.ToString(offset), ModuleLogLevel);
offset += (int)PackChunking.chunkToLen(m_SenderChunkList[senderChunkIdx]);
senderChunkIdx++;
}
}
catch (Exception exc)
{
LogUtility.LogUtility.LogFile("EXCEPTION: " + exc.Message + " " + exc.StackTrace + " " + exc.InnerException, LogUtility.LogLevels.LEVEL_LOG_HIGH);
}
}
