private void UpdateOrAddRecoverySet(Par2RecoverySet recoverySet)
{
lock (syncObject)
{
string setid = ToolKit.ToHex(recoverySet.MainPacket.header.setid);
if (!setids.Keys.Contains(setid))
{
setids.Add(setid, recoverySet);
}
else
{
UpdateRecoverySet(setids[setid], recoverySet);
}
}
}
private static void CheckBuffer(byte[] buffer, DiskFile diskFile, string filename, int blocksize, Dictionary <uint, FileVerificationEntry> hashfull, ref MatchType matchType, int globalOffset)
{
uint partial_key = (uint)(Path.GetFileName(filename).GetHashCode());
MD5 md5Hasher = MD5.Create();
//FastCRC32.FastCRC32 crc32 = new FastCRC32.FastCRC32((ulong)blocksize);
FastCRC32.FastCRC32 crc32 = FastCRC32.FastCRC32.GetCRC32Instance((ulong)blocksize);
int offset = 0;
byte inch = 0;
byte outch = 0;
uint crc32Value = 0;
crc32Value = crc32.CRCUpdateBlock(0xFFFFFFFF, (uint)blocksize, buffer, (uint)offset) ^ 0xFFFFFFFF;
while (offset < (buffer.Length - blocksize))
{
uint key = crc32Value ^ partial_key;
FileVerificationEntry entry = null;
if (hashfull.ContainsKey(key))
{
entry = hashfull[key];
byte[] blockhash = md5Hasher.ComputeHash(buffer, offset, blocksize);
if (ToolKit.ToHex(blockhash) == ToolKit.ToHex(entry.hash))
{
// We found a complete match, so go to next block !
//Console.WriteLine("block found at offset {0}, crc {1}", globalOffset + offset, entry.crc);
if (entry.datablock.diskfile == null)
{
lock (entry)
{
if (entry.datablock.diskfile == null)
{
entry.SetBlock(diskFile, (int)(globalOffset + offset));
}
}
}
offset += blocksize;
crc32Value = crc32.CRCUpdateBlock(0xFFFFFFFF, (uint)(Math.Min(blocksize, buffer.Length - offset)), buffer, (uint)offset) ^ 0xFFFFFFFF;
}
else
{
if (offset + blocksize > buffer.Length)
{
return;
}
matchType = MatchType.PartialMatch;
inch = buffer[offset + blocksize];
outch = buffer[offset];
crc32Value = crc32.windowMask ^ crc32.CRCSlideChar(crc32.windowMask ^ crc32Value, inch, outch);
++offset;
}
}
else
{
if (offset + blocksize > buffer.Length)
{
return;
}
matchType = MatchType.PartialMatch;
inch = buffer[offset + blocksize];
outch = buffer[offset];
crc32Value = crc32.windowMask ^ crc32.CRCSlideChar(crc32.windowMask ^ crc32Value, inch, outch);
++offset;
}
}
}
