/* File: MBCMoveGenerator.h Contains: Generate all legal moves from a position Copyright: © 2003 by Apple Inc., all rights reserved. IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. 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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #import "MBCBoard.h" /* * An MBCMoveGenerator generates all legal moves from a position (for various * variants and various definitions of "legality" and communicates them to * an object of a class derived from MBCMoveBuilder. */ @protocol MBCMoveBuilder - (void) startMoveList:(BOOL)white; - (void) startUnambiguousMoves; - (void) endMoveList; - (void) validMove:(MBCPiece)piece from:(MBCSquare)from to:(MBCSquare)to; - (void) validMove:(MBCPiece)piece from:(MBCSquare)from to:(MBCSquare)to capturing:(MBCPiece)victim; - (void) validDrop:(MBCPiece)piece at:(MBCSquare)at; - (void) validCastle:(MBCPiece)king kingSide:(BOOL)kingSide; @end // // An MBCMoveCounter just counts legal moves // @interface MBCMoveCounter : NSObject <MBCMoveBuilder> { int fCount; bool fCounting; } - (int)count; @end // // An MBCDebugMoveBuilder prints legal moves // @interface MBCDebugMoveBuilder : NSObject <MBCMoveBuilder> { bool fUnambiguous; NSMutableArray * fMoves; NSMutableArray * fUnambiguousMoves; NSMutableArray * fDrops; } + (id)debugMoveBuilder; @end typedef uint64_t MBCBoardMask; // // An MBCPieceMoves collects all legal moves for one piece type // struct MBCPieceMoves { int fNumInstances; // Max. 16 (Pawns in crazyhouse) MBCSquare fFrom[16]; MBCBoardMask fTo[16]; }; // // An MBCMoveCollection collects all legal moves // struct MBCMoveCollection { MBCPieceMoves fMoves[7]; MBCPieceMoves fUnambiguousMoves[7]; MBCBoardMask fPawnDrops; MBCBoardMask fPieceDrops; char fDroppablePieces; bool fCastleKingside; bool fCastleQueenside; bool fWhiteMoves; void AddMove(bool unambig, MBCPiece piece, MBCSquare from, MBCSquare to); void AddDrop(MBCPiece piece, MBCSquare at); void AddCastle(bool kingSide); }; // // An MBCMoveCollector collects all legal moves in an MBCMoveCollection // @interface MBCMoveCollector : NSObject <MBCMoveBuilder> { bool fUnambiguous; MBCMoveCollection fCollection; }; - (MBCMoveCollection *) collection; @end class MBCMoveGenerator { public: MBCMoveGenerator(id <MBCMoveBuilder> builder, MBCVariant variant, long flags); void SetVariant(MBCVariant variant); void Generate(bool white, const MBCPieces & position); void Ambiguities(MBCSquare from, MBCSquare to, const MBCPieces & position); bool InCheck(bool white, const MBCPieces & position); bool InCheckMate(bool white, const MBCPieces & position); bool InStaleMate(bool white, const MBCPieces & position); private: bool TryMove(MBCPiece piece, MBCSquare from, MBCSquare to); bool TryMove(MBCPiece piece, MBCSquare from, int dCol, int dRow); void TryMoves(MBCPiece piece, MBCSquare from, int dCol, int dRow); void TryMoves(MBCPiece piece, MBCSquare from); void TryCastle(); void TryDrops(); void TryMoves(bool unambiguous); id <MBCMoveBuilder> fBuilder; long fFlags; MBCVariant fVariant; MBCPieceCode fColor; MBCPiece fPieceFilter; MBCSquare fTargetFilter; const MBCPieces * fPosition; bool fUnambiguous; uint8_t fTargetUsed[64]; uint8_t fTargetAmbiguous[64]; }; // // An MBCCheckCounter counts moves that don't leave the king in check // @interface MBCCheckCounter : MBCMoveCounter { bool fWhite; bool fCanCastle; MBCMoveGenerator * fGenerator; MBCPieces fPosition; } - (id)initForWhite:(BOOL)white variant:(MBCVariant)variant position:(const MBCPieces *)pos canCastle:(BOOL)canCastle; @end // Local Variables: // mode:ObjC // End: