public string CodeEncode(string text, object key, Language language)
{
var complexKey = key as ComplexKey;
var alphabet = SymbolsOperations.GetAlphabet(language);
var repeatedKey = GetRepeatKey(complexKey.Key, text);
var result = new StringBuilder();
var alphabetLenght = alphabet.Length;
int i = 0;
foreach (var letter in text)
{
var letterIndex = alphabet.IndexOf(char.ToUpper(letter));
if (letterIndex < 0)
{
result.Append(letter.ToString());
}
else
{
var codeIndex = alphabet.IndexOf(char.ToUpper(repeatedKey[i++]));
var index = (alphabetLenght + letterIndex + ((complexKey.Encrypting ? 1 : -1) * codeIndex)) % alphabetLenght;
var codedLetter = alphabet[index];
result.Append(SymbolsOperations.GetLetterWithProperRegister(letter, codedLetter));
}
}
return(result.ToString());
}
private void FillGridView()
{
var symbolsCodes = _huffmanCoder.GetSymbolsCodes();
dataGridView1.Rows.Add(symbolsCodes.Count);
int i = 0;
foreach (var symbolCode in symbolsCodes)
{
switch (symbolCode.Key)
{
case ' ':
dataGridView1.Rows[i].Cells[0].Value = "SPACE";
break;
case '\t':
dataGridView1.Rows[i].Cells[0].Value = "TAB";
break;
case '\n':
dataGridView1.Rows[i].Cells[0].Value = "ENTER";
break;
default:
dataGridView1.Rows[i].Cells[0].Value = symbolCode.Key;
break;
}
dataGridView1.Rows[i].Cells[1].Value = SymbolsOperations.BoolListToBitString(symbolCode.Value);
i++;
}
}
public string CodeEncode(string text, object key, Language language)
{
int numberKey = Convert.ToInt32(key);
var alphabet = SymbolsOperations.GetAlphabet(language);
var lettersQuantity = alphabet.Length;
var result = new StringBuilder();
foreach (var letter in text)
{
var letterIndexInAlphabet = alphabet.IndexOf(char.ToUpper(letter));
if (letterIndexInAlphabet < 0)
{
result.Append(letter.ToString());
}
else
{
var codedLetterIndexDirty = (lettersQuantity + letterIndexInAlphabet + numberKey) % lettersQuantity;
var codedLetterIndex = codedLetterIndexDirty >= 0
? codedLetterIndexDirty
: (lettersQuantity + codedLetterIndexDirty);
var codedLetter = char.IsLower(letter)
? char.ToLower(alphabet[codedLetterIndex])
: char.ToUpper(alphabet[codedLetterIndex]);
result.Append(codedLetter);
}
}
return(result.ToString());
}
public string CodeEncode(string text, object key, Language language)
{
var result = new StringBuilder();
var onlyLetters = new StringBuilder();
foreach (var letter in text)
{
if (char.IsLetter(letter))
{
onlyLetters.Append(letter);
}
}
var frequencyTable = GetLetterFrequencyTable(language);
frequencyTable = frequencyTable.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
var customFrequencyTable = GetLetterFrequenceTableForText(text, onlyLetters.ToString());
customFrequencyTable = customFrequencyTable.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value);
AddValuesToGrid(DataGridView, frequencyTable, customFrequencyTable);
foreach (var letter in text)
{
if (!char.IsLetter(letter))
{
result.Append(letter);
}
else
{
onlyLetters.Append(letter);
var letterPosition = GetIndex(customFrequencyTable, char.ToLower(letter));
var codedLetter = frequencyTable.ElementAt(letterPosition).Key;
codedLetter = SymbolsOperations.GetLetterWithProperRegister(letter, codedLetter);
result.Append(codedLetter);
}
}
return(result.ToString());
}
