/// <summary>
/// Reads a block from the underlying stream and compresses it
/// </summary>
/// <returns>
/// True if data was read and compressed
/// False if the end of the underlying stream was reached
/// </returns>
private Boolean ReadAndCompress()
{
this.streamOffset = this.streamLength = 0;
// read the uncompressed block into the read buffer
var decoded = ReadBlock(this.readBuffer, this.readBuffer.Length);
if (decoded > 0)
{
// compress the block into the stream buffer,
// leaving room for the header
var encoded = Encode(
this.readBuffer,
0,
decoded,
this.streamBuffer,
BlockHeader.Size
);
// copy the length header into the stream buffer
var header = new BlockHeader()
{
EncodedLength = encoded,
DecodedLength = decoded
};
this.streamLength += header.Encode(this.streamBuffer);
this.streamLength += encoded;
return true;
}
return false;
}