private unsafe long EncodeCopyForBestMatch(ulong hash, long candidateStart, long unencodedStart, long unencodedSize, byte *newDataPtr, ByteBuffer newData)
{
BlockHash.Match bestMatch = new BlockHash.Match();
dictionary.FindBestMatch(hash, candidateStart, unencodedStart, unencodedSize, newDataPtr, newData, ref bestMatch);
if (bestMatch.size < minBlockSize)
{
return(0);
}
if (bestMatch.tOffset > 0)
{
newData.Position = (int)unencodedStart;
windowEncoder?.Add(newData.ReadBytesAsSpan((int)bestMatch.tOffset));
}
windowEncoder?.Copy((int)bestMatch.sOffset, (int)bestMatch.size);
return(bestMatch.size + bestMatch.tOffset);
}
//currently does not support looking in target
//only the dictionary
long EncodeCopyForBestMatch(ulong hash, long candidateStart, long unencodedStart, long unencodedSize)
{
BlockHash.Match bestMatch = new BlockHash.Match();
dictionary.FindBestMatch(hash, candidateStart, unencodedStart, unencodedSize, newData, bestMatch);
if (bestMatch.Size < MinBlockSize)
{
return(0);
}
if (bestMatch.TargetOffset > 0)
{
newData.Position = unencodedStart;
windowEncoder.Add(newData.ReadBytes((int)bestMatch.TargetOffset));
}
windowEncoder.Copy((int)bestMatch.SourceOffset, (int)bestMatch.Size);
return(bestMatch.Size + bestMatch.TargetOffset);
}