public override char GetMappedLetter(char letter, MappingDirection dir = MappingDirection.RightToLeft)
{
if (dir == MappingDirection.RightToLeft)
{
char innerMapping = Mapping[letter.AddOffset(-_offset) - 'A'];
return(innerMapping.AddOffset(_offset));
}
char innerInput = letter.AddOffset(-_offset);
return((char)(((Mapping.IndexOf(innerInput) + _offset) % AlphabetLength) + 'A'));
}
private char GetEntryLetter(char letter)
{
return(letter.AddOffset(CurrentRingLetter));
}
private char IncrementLetter(char letter)
{
return(letter.AddOffset(1));
}