private void ValidKey(Position[] key)
{
if (key.Length < 2)
throw new ArgumentException();
if (key.Length != 4)
throw new ArgumentException();
if (key.Max(p => Math.Max(p.Row, p.Column)) != 4)
throw new ArgumentException();
}
protected override void ElementAction(Position tablePosition)
{
if (messagePosition != 0 && messagePosition % matrixSize == 0)
message.Shift += matrixSize;
decryptMessage[messagePosition++] = message[tablePosition];
}
protected abstract void ElementAction(Position tablePosition);
private void TurnPosition(Position position)
{
int row = position.Row;
position.Row = position.Column;
position.Column = -row;
}
private void TurnPositions(Position[] positions)
{
for (var i = 0; i < positions.Length; i++)
TurnPosition(positions[i]);
}
private void TransformeIndexes(Position[] positions, int order)
{
var halfOrder = order / 2;
var orderEven = order % 2 == 0;
for (var i = 0; i < positions.Length; i++)
{
positions[i].Row = positions[i].Row - halfOrder;
if (orderEven && positions[i].Row >= 0)
positions[i].Row = positions[i].Row + 1;
positions[i].Column = positions[i].Column - halfOrder;
if (orderEven && positions[i].Column >= 0)
positions[i].Column = positions[i].Column + 1;
}
}
public char this[Position position]
{
get
{
return this[position.Row, position.Column];
}
set
{
this[position.Row, position.Column] = value;
}
}
