private void EncodeBytes(byte[] source, string dictionary_file_path, string destination_file_path, ref DecodingInfo info)
{
var priorities = CountPriorities(source);
var binaryTree = new HuffmanBinaryTree(priorities);
byte[] destinationBytes = FillInByteDestination(source, binaryTree);
File.WriteAllBytes(destination_file_path, destinationBytes);
info.CodeDict = binaryTree.CodeDict;
info.MinCodeLength = binaryTree.MinCodeLength;
IFormatter formatter = new BinaryFormatter();
Stream DictStream = new FileStream(dictionary_file_path, FileMode.Create, FileAccess.Write, FileShare.None);
formatter.Serialize(DictStream, info);
File.SetAttributes(dictionary_file_path, FileAttributes.Hidden);
DictStream.Close();
}
/* private HuffmanBinaryTree CreateTree(Dictionary<byte, long> byte_priorities)
* {
* var nodes = new List<Node>();
*
* foreach (var kvp in byte_priorities)
* {
* nodes.Add(new Node(kvp.Key, kvp.Value));
* }
*
* while (nodes.Count > 1)
* {
* nodes.Sort(Node.Compare);
*
* nodes[0] = new Node(nodes[0], nodes[1]);
* nodes.RemoveAt(1);
* }
* if(nodes.Count == 0)
* {
* return new HuffmanBinaryTree(null);
* }
* return new HuffmanBinaryTree(nodes[0]);
* }*/
private byte[] FillInByteDestination(byte[] source, HuffmanBinaryTree binaryTree)
{
canc_token.ThrowIfCancellationRequested();
int position = 0;
Byte temp = 0;
Code a;
List <byte> destination = new List <byte>();
int processed = 0;
foreach (byte character in source)
{
a = binaryTree.GetCode(binaryTree.Root, character);
for (int j = 0; j < a.BitNumber; j++)
{
byte CurrentBit = a.Number.GetBit((int)(32 - a.BitNumber + j));
if (position < 8)
{
temp = (Byte)(temp * 2 + CurrentBit);
position++;
}
if (position == 8)
{
destination.Add(temp);
temp = 0;
position = 0;
}
}
processed = processed + 1;
if (processed % interval == 0)
{
PartialPerformStep(1);
}
if (position != 0 && processed == source.Length)
{
while (position < 8)
{
temp = (Byte)(temp * 2);
position++;
}
destination.Add(temp);
}
if (canc_token.IsCancellationRequested)
{
canc_token.ThrowIfCancellationRequested();
}
}
return(destination.ToArray());
}
