/// <summary>
/// compress the input data
/// </summary>
/// <param name="input">the input data</param>
/// <param name="compressMode">the compress mode of this compress</param>
/// <returns>compressed data, if the compressed data is larger than input data, the original data
/// is returned</returns>
public byte[] Compress(byte[] input, out CompressMode compressMode)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
compressMode = CompressMode.Compressed;
if (input.Length > (window8k - slidingWindow.Count))
{
compressMode = compressMode | CompressMode.SetToFront;
hashTable.Clear();
slidingWindow.Clear();
}
CompressCore(input);
byte[] ret = new byte[outputStream.Length];
outputStream.Position = 0;
outputStream.Read(ret, 0, ret.Length);
//put stream position to 0 for next round compress
outputStream.SetLength(0);
if (ret.Length > input.Length)
{
compressMode = CompressMode.Flush;
hashTable.Clear();
slidingWindow.Clear();
return(input);
}
return(ret);
}
/// <summary>
/// Initialize all field of this class instance
/// </summary>
private void InitializeAll()
{
historyBuffer.Clear();
decodeState = DecodeState.Init;
needMoreData = false;
remain = 0;
remainBitsCount = 0;
offset = 0;
length = 0;
literal = 0;
}
