public static string stegoZWCret(string fileName)
{
List <char> lista = WordDocument.returnChars(fileName);
List <bool> binary = new List <bool>();
int end = 0;
int bajt = 0;
for (int i = 0; i < lista.Count; i++)
{
if (lista[i] == ' ')
{
if ((int)lista[i - 1] == 8203)
{
binary.Add(true);
end = 0;
}
else
{
binary.Add(false);
end++;
}
if ((int)lista[i + 1] == 8203)
{
binary.Add(true);
end = 0;
}
else
{
binary.Add(false);
end++;
}
}
if (end > 7 && bajt == 7)
{
break;
}
bajt = (bajt == 7) ? 0 : bajt + 1;
}
string toRet = binaryToString(binary);
return(toRet);
}
public static string stegoHuffmanRet(string fileName, Dictionary <char, int> frequencies)
{
string toRet = "";
List <bool> binary = new List <bool>();
List <char> chars;
chars = WordDocument.returnChars(fileName);
HuffmanTree huffTree = new HuffmanTree();
huffTree.Frequencies = frequencies;
huffTree.buildFromFrequences();
for (int i = 0; i < chars.Count; i++)
{
if (chars[i] == ' ')
{
string temp;
if (chars[i + 1] == ' ')
{
binary.Add(true);
i++;
temp = huffTree.decodeChar(true);
}
else
{
binary.Add(false);
temp = huffTree.decodeChar(false);
}
if (temp != string.Empty && temp != "\0")
{
toRet += temp;
}
if (temp == "\0")
{
break;
}
}
}
return(toRet);
}
public static string stegoCharRet(string fileName, int[] stegoKey, string[] compressKey, List <string> table)
{
string toRet = "";
List <char> lista = WordDocument.returnChars(fileName);
List <bool> binary = new List <bool>();
int end = 0;
int bajt = 0;
int i = 0;
List <int> key = stegoKey.ToList();
while (i + 4 < lista.Count)
{
int group = 0;
for (int j = 0; j < 4; j++)
{
int value = (int)lista[i + 1];
int n = key.IndexOf(value);
if (n < 0)
{
break;
}
for (int k = group; k < n; k++)
{
binary.Add(false);
group++;
end++;
bajt++;
}
if (group < 4)
{
binary.Add(true);
group++;
i++;
end = 0;
bajt++;
}
}
while (group < 4)
{
binary.Add(false);
group++;
end++;
bajt++;
}
i++;
if (table != null)
{
if (binary.Count >= table.Count * 2)
{
break;
}
}
else
{
if (end > 7 && bajt == 8)
{
break;
}
if (bajt == 8)
{
bajt = 0;
}
}
}
if (table != null)
{
binary = groupDecompress(binary, table, compressKey);
}
toRet = binaryToString(binary);
return(toRet);
}