Exemplo n.º 1
0
        public DataFile Decompress(DataFile dataFile)
        {
            var inputBytes      = dataFile.GetAllBytes();
            var outputList      = new LZDecoderList();
            var lzByteConverter = new LZByteConverter();
            var bitIndexer      = new BitIndexer(inputBytes);

            while (!bitIndexer.AtEnd())
            {
                // Calculate the UnevenByte length in bits
                var ubLength =
                    lzByteConverter.GetUnevenByteLength(bitIndexer.GetNext());
                bitIndexer.GoToPrevious(); // Unread the bit

                // If it cannot fit within the remaining bits, we must be done
                if (ubLength > bitIndexer.Remaining)
                {
                    break;
                }

                // Get the bits
                var ub = bitIndexer.GetNextRange(ubLength);

                // Convert UnevenByte to EncodedLZByte
                var eb = lzByteConverter.ToEncodedByte(ub);

                // Decode and add encoded byte to list
                outputList.DecodeAndAddEncodedByte(eb);
            }

            // Turn the list into an array and return it
            return(new DataFile(outputList.ToArray()));
        }
Exemplo n.º 2
0
        public DataFile Compress(DataFile input)
        {
            var slidingWindow   = new SlidingWindow(input.GetAllBytes());
            var lzByteConverter = new LZByteConverter();
            var bitString       = new BitString();

            while (!slidingWindow.AtEnd())
            {
                // Encode the next byte
                var eb = slidingWindow.Slide();

                // Convert to UnevenByte
                var ub = lzByteConverter.ToUnevenByte(eb);

                // Add to bitString
                bitString.Append(ub);
            }

            return(new DataFile(bitString.ToArray()));
        }