private static Char GetStateDesc(FourInARowFieldState state)
{
switch (state)
{
case FourInARowFieldState.Empty: return('E');
case FourInARowFieldState.Circle: return('O');
case FourInARowFieldState.Cross: return('X');
default:
throw new NotSupportedException(state.ToString());
}
}
private static Int32 GetSign(FourInARowFieldState state)
{
if (state == FourInARowFieldState.Cross)
{
return(1);
}
else if (state == FourInARowFieldState.Circle)
{
return(-1);
}
else
{
throw new ArgumentException(state.ToString());
}
}
public FourInARowState()
{
_fields = new FourInARowFieldState[ColumnCount][];
_nextMoveIndexes = new Int32[ColumnCount];
for (Int32 q = 0; q < _fields.Length; q++)
{
_fields[q] = new FourInARowFieldState[RowCount];
}
_stateDesc = new Char[RowCount * ColumnCount];
for (Int32 q = 0; q < _stateDesc.Length; q++)
{
_stateDesc[q] = GetStateDesc(FourInARowFieldState.Empty);
}
}
internal FourInARowState(FourInARowState source)
{
if (null == source)
{
throw new ArgumentNullException("source");
}
_nextMoveIndexes = (Int32[])source._nextMoveIndexes.Clone();
_fields = new FourInARowFieldState[ColumnCount][];
for (Int32 q = 0; q < _fields.Length; q++)
{
_fields[q] = (FourInARowFieldState[])source._fields[q].Clone();
}
_stateDesc = (Char[])source._stateDesc.Clone();
_lastEmptyRow = source._lastEmptyRow;
}
internal void Set(Int32 x, Int32 y, FourInARowFieldState state)
{
_fields[x][y] = state;
_stateDesc[x + ColumnCount * y] = GetStateDesc(state);
_nextMoveIndexes[x]++;
if (y >= _lastEmptyRow)
{
_lastEmptyRow = y + 1;
}
if (state == FourInARowFieldState.Cross)
{
_crossesInRow[y]++;
_crossesInColumn[x]++;
}
else if (state == FourInARowFieldState.Circle)
{
_circlesInRow[y]++;
_circlesInColumn[x]++;
}
}
private static void ProcessField(FourInARowState state, Int32 x, Int32 y, FieldContext context)
{
FourInARowFieldState field = state.Get(x, y);
context.LastFourItems.Add(field);
if (field == FourInARowFieldState.Empty)
{
context.EmptyInRow++;
}
if (field == FourInARowFieldState.Circle)
{
context.CirclesInRow++;
}
if (field == FourInARowFieldState.Cross)
{
context.CrossesInRow++;
}
if (context.LastFourItems.Count >= 4)
{
if (context.LastFourItems.Count > 4)
{
FourInARowFieldState first = context.LastFourItems[0];
context.LastFourItems.RemoveAt(0);
if (first == FourInARowFieldState.Empty)
{
context.EmptyInRow--;
}
if (first == FourInARowFieldState.Circle)
{
context.CirclesInRow--;
}
if (first == FourInARowFieldState.Cross)
{
context.CrossesInRow--;
}
}
if (context.CirclesInRow == 0)
{
if (context.CrossesInRow == 4)
{
context.PartialResults.FourCrossesInRow++;
}
else if (context.CrossesInRow == 2 && context.EmptyInRow == 2)
{
context.PartialResults.TwoCrossesInRow++;
}
else if (context.CrossesInRow == 3 && context.EmptyInRow == 1)
{
context.PartialResults.ThreeCrossesInRow++;
}
else if (context.CrossesInRow == 1 && context.EmptyInRow == 3)
{
context.PartialResults.OneCrossInRow++;
}
}
if (context.CrossesInRow == 0)
{
if (context.CirclesInRow == 4)
{
context.PartialResults.FourCirclesInRow++;
}
else if (context.CirclesInRow == 2 && context.EmptyInRow == 2)
{
context.PartialResults.TwoCirclesInRow++;
}
else if (context.CirclesInRow == 3 && context.EmptyInRow == 1)
{
context.PartialResults.ThreeCirclesInRow++;
}
else if (context.CirclesInRow == 1 && context.EmptyInRow == 3)
{
context.PartialResults.OneCircleInRow++;
}
}
}
}
