internal CastlingInfo2(
CastlingType castlingType,
GameMove2 kingMove,
GameMove2 rookMove,
[NotNull] params Square[] emptySquares)
{
castlingType.EnsureDefined();
if (emptySquares is null)
{
throw new ArgumentNullException(nameof(emptySquares));
}
if (kingMove.From.Rank != kingMove.To.Rank ||
Math.Abs(kingMove.From.SquareIndex - kingMove.To.SquareIndex) != 2)
{
throw new ArgumentException(
$@"Invalid castling move '{kingMove.ToUciNotation()}'.",
nameof(kingMove));
}
CastlingType = castlingType;
CastlingSide = castlingType.GetSide();
Option = castlingType.ToOption();
KingMove = kingMove;
RookMove = rookMove;
EmptySquares = emptySquares.AsReadOnly();
PassedSquare = new Square((kingMove.From.SquareIndex + kingMove.To.SquareIndex) / 2);
GameSide = Option.IsAnySet(CastlingOptions.WhiteMask) ? GameSide.White : GameSide.Black;
}
private static void PopulateKingCastlingMoves(
ICollection <GameMoveData2> resultMoves,
Square sourceSquare,
Bitboard target,
CastlingOptions allowedCastlingOptions,
Bitboard nonEmptySquares,
CastlingType castlingType)
{
var option = castlingType.ToOption();
if ((allowedCastlingOptions & option) == 0)
{
return;
}
var info = KingCastlingInfos[GetCastlingTypeArrayIndexInternal(castlingType)];
if (info.KingMove.From != sourceSquare || (info.ExpectedEmptySquares & nonEmptySquares).IsAny ||
(info.KingMove.To.Bitboard & target).IsNone)
{
return;
}
var moveData = new GameMoveData2(info.KingMove, GameMoveFlags.IsKingCastling);
resultMoves.Add(moveData);
}