public static List <char> CodeWithModuleQTestEncode(int q, List <char> combination, ListBox listBox)
{
int checkBit = q - (SumOfList(combination, q) % q);
checkBit = checkBit == q ? 0 : checkBit;
listBox.Items.Add($"Check bit: {q} - ({SumOfList(combination, q)} mod {q}) = {checkBit}");
combination.Add(checkBit < 10 ? checkBit.ToString().ToCharArray()[0] : LettersToNumbers.FirstOrDefault(x => x.Value == checkBit).Key);
return(combination);
}
public static void IterativeСodeFixMistakes(char[,] inputMatrix, int q, ListBox listBox)
{
char[,] encodedMatrix = Crypto.IterativeСodeEncode(inputMatrix, q);
int columnOfError = 0, rowOfError = 0, checkNumber = 0;
for (int i = 0; i < encodedMatrix.GetLength(0) - 2; i++)
{
if (encodedMatrix[i, encodedMatrix.GetLength(1) - 1] != '0')
{
rowOfError = i + 1;
if (!Int32.TryParse(encodedMatrix[i, encodedMatrix.GetLength(1) - 1].ToString(), out checkNumber))
{
checkNumber = LettersToNumbers[encodedMatrix[i, encodedMatrix.GetLength(1) - 1].ToString().ToUpper().ToCharArray()[0]];
}
}
}
for (int i = 0; i < encodedMatrix.GetLength(1) - 2; i++)
{
if (encodedMatrix[encodedMatrix.GetLength(0) - 1, i] != '0')
{
columnOfError = i + 1;
}
}
if (columnOfError != 0 && rowOfError != 0)
{
int falseValue;
if (!Int32.TryParse(encodedMatrix[rowOfError - 1, columnOfError - 1].ToString(), out falseValue))
{
falseValue = LettersToNumbers[encodedMatrix[rowOfError - 1, columnOfError - 1].ToString().ToUpper().ToCharArray()[0]];
}
int realValue = (falseValue + (checkNumber % q)) == q ? 0 : (falseValue + (checkNumber % q));
char realValueChar = realValue <= 10 ? Convert.ToChar(realValue.ToString()) : LettersToNumbers.FirstOrDefault(x => x.Value == (checkNumber % q)).Key;
inputMatrix[rowOfError - 1, columnOfError - 1] = realValueChar;
listBox.Items.Add(
$"Mistake was found in column {columnOfError}, row {rowOfError}: {encodedMatrix[rowOfError - 1, columnOfError - 1]} -> {inputMatrix[rowOfError - 1, columnOfError - 1]}");
listBox.Items.Add("Fixed matrix: ");
DisplayMatrixWithLastAdditionalSymbol(listBox, inputMatrix);
listBox.Items.Add($"Fixed message: {GetMessageFromMatrix(inputMatrix)}");
}
else
{
listBox.Items.Add("Mistake wasn't found");
}
}
