/// <summary> строем дерево и тд. </summary>
/// <param name="Data"> поток для записи</param>
public Stream Encode(Stream Data)
{
String TempDir = Environment.GetEnvironmentVariable("temp");
HuffmanTree huffmanTree = new HuffmanTree(BuildFrequencyTable(Data));
FileStream tempFS = new FileStream(TempDir + @"\TempArch.tmp", FileMode.Create);
WriteHeader(tempFS, huffmanTree.frequencyTable, Data.Length, 11, GetComplementsBits(huffmanTree));
long DataSize = Data.Length;
TreeNode TempNode = null;
Byte Original;
short j;
int k;
for (long i = 0; i < DataSize; ++i)
{
Original = (Byte)Data.ReadByte();
TempNode = huffmanTree.Leafs[ByteLocation[Original]];
while (TempNode.Parent != null)
{
BitsList.Add(TempNode.Parent.Left == TempNode);
TempNode = TempNode.Parent;
}
BitsList.Reverse();
k = BitsList.Count;
for (j = 0; j < k; ++j)
{
Stack.PushFlag((bool)BitsList[j]);
if (Stack.IsFull())
{
tempFS.WriteByte(Stack.Container);
Stack.Empty();
}
}
BitsList.Clear();
}
//Запись последнего байта, если стек не пуст.
if (!Stack.IsEmpty())
{
Byte BitsToComplete = (Byte)(8 - Stack.NumOfBits());
for (byte Count = 0; Count < BitsToComplete; ++Count)
{
Stack.PushFlag(false);
}
tempFS.WriteByte(Stack.Container);
Stack.Empty();
}
tempFS.Seek(0, SeekOrigin.Begin);
return(tempFS);
}
/// <summary>архивнуть </summary>
public void Encode(Stream Data, string OutputFile)
{
HuffmanTree huffmanTree = new HuffmanTree(BuildFrequencyTable(Data));
FileStream tempFS = new FileStream(OutputFile, FileMode.Create);
WriteHeader(tempFS, huffmanTree.frequencyTable, Data.Length, 11, GetComplementsBits(huffmanTree));
long DataSize = Data.Length;
TreeNode TempNode = null;
Byte Original;
short j;
int k;
for (long i = 0; i < DataSize; ++i)
{
Original = (Byte)Data.ReadByte();
TempNode = huffmanTree.Leafs[ByteLocation[Original]];
while (TempNode.Parent != null)
{
BitsList.Add(TempNode.Parent.Left == TempNode);
TempNode = TempNode.Parent;
}
BitsList.Reverse();
k = BitsList.Count;
for (j = 0; j < k; ++j)
{
Stack.PushFlag((bool)BitsList[j]);
if (Stack.IsFull())
{
tempFS.WriteByte(Stack.Container);
Stack.Empty();
}
}
BitsList.Clear();
}
if (!Stack.IsEmpty())
{
Byte BitsToComplete = (Byte)(8 - Stack.NumOfBits());
for (byte Count = 0; Count < BitsToComplete; ++Count)
{
Stack.PushFlag(false);
}
tempFS.WriteByte(Stack.Container);
Stack.Empty();
}
tempFS.Seek(0, SeekOrigin.Begin);
tempFS.Close();
}