/// <summary>
/// Checks if the rotor needs to be advanced
/// </summary>
/// <param name="r">the previous rotor</param>
/// <returns></returns>
private bool CheckToAdvance(Rotor r)
{
// stores the list of values that rotate the rotor
List <char> values = RotorInformation.RotateValues(r.RotorIndex());
// if the list contains the previous letter, return true
if (values.Contains(r.LetterInAlpha(25)))
{
return(true);
}
// does not need to be rotated
return(false);
}
/// <summary>
/// Checks the letter in the alphabet and the index of the cipher
/// </summary>
/// <param name="l">the stored letter</param>
/// <param name="i">the stored index</param>
/// <param name="r">the rotor to check</param>
private void LeftToRight(ref char l, ref int i, Rotor r)
{
l = r.LetterInAlpha(i);
i = r.CipherIndexOfLetter(l);
}