static void encode(string input, string fileName)
{
using (var file = new FileStream(fileName, FileMode.Create))
{
}
var coder = new Coder();
// input = input.Replace("\r","");
var encodeStr = new StringBuilder(coder.Encode(input + "\n\0\n", fileName));
var builder = new StringBuilder();
foreach (var freq in coder.getFrequencies())
{
builder.Append(freq.Key);
builder.Append(" ");
builder.Append(freq.Value);
builder.Append("\n");
}
builder.Append("\n\0\n");
var writer = new BinStream(fileName);
writer.WriteBits(new BitArray(Encoding.GetEncoding(1251).GetBytes(builder.ToString())), FileMode.Append);
OutputBits(new BinStream(fileName), encodeStr.ToString(), fileName);
}
private static void OutputBits(BinStream stream, string toWrite, string fileName)
{
var bytes = BigInteger.Parse(toWrite).ToByteArray();
var bitsStr = string.Concat(bytes.Select(b => Convert.ToString(b, 2).PadLeft(8, '0')).Reverse());
var list = new List <bool>(bitsStr.Length);
foreach (var c in bitsStr)
{
list.Add(c != '0');
}
var bits = new BitArray(list.ToArray());
stream.WriteBits(bits, FileMode.Append);
}
static void decode(string fileName)
{
var coder = new Coder();
BitArray fileBits;
var tree = new StringBuilder();
using (var file = new FileStream(fileName, FileMode.Open))
{
using (var reader = new BinaryReader(file))
{
reader.BaseStream.Seek(0, SeekOrigin.Begin);
var tmp = new char[3];
while (true)
{
if ((tmp[0] = Encoding.GetEncoding(1251).GetString(new byte[1] {
reader.ReadByte()
})[0]) == '\n'
& (tmp[1] = Encoding.GetEncoding(1251).GetString(new byte[1] {
reader.ReadByte()
})[0]) ==
'\0'
& (tmp[2] = Encoding.GetEncoding(1251).GetString(new byte[1] {
reader.ReadByte()
})[0]) ==
'\n')
{
break;
}
reader.BaseStream.Seek(-3, SeekOrigin.Current);
while ((tmp[0] = Encoding.GetEncoding(1251).GetString(new byte[1] {
reader.ReadByte()
})[0]) !=
' ')
{
tree.Append((char)tmp[0]);
}
if ((tmp[1] = Encoding.GetEncoding(1251).GetString(new byte[1] {
reader.ReadByte()
})[0]) ==
' ')
{
tree.Append((char)tmp[0]);
}
reader.BaseStream.Seek(-1, SeekOrigin.Current);
while ((tmp[0] = Encoding.GetEncoding(1251).GetString(new byte[1] {
reader.ReadByte()
})[0]) !=
'\n')
{
tree.Append((char)tmp[0]);
}
tree.Append('\n');
}
reader.BaseStream.Seek(1, SeekOrigin.Current);
fileBits = new BinStream().ReadBits((reader.ReadBytes((int)(file.Length - reader.BaseStream.Position))));
var dict = new Dictionary <char, decimal>();
for (int i = 0; i < tree.Length - 1; i++)
{
var num = new StringBuilder();
var c = tree[i];
i++;
char n;
while ((n = tree[i]) != '\n')
{
num.Append(n);
i++;
}
// if(c != '\r')
dict.Add(c, int.Parse(num.ToString()));
}
var builder = new StringBuilder();
for (int i = 0; i < fileBits.Length; i++)
{
builder.Append(fileBits.Get(i) ? '1' : '0');
}
var encoded = FromBinary(builder.ToString()).ToString();
var decoded = coder.Decode(encoded.ToString(), dict);
File.WriteAllText("DEC" + fileName.Remove(fileName.LastIndexOf(".")),
decoded.Remove(decoded.Length - 2),
Encoding.GetEncoding(1251));
}
}
}
