gchess.h

一个非常有用的开源代码

/*
	Copyright (C) 2006, Mike Gashler

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	see http://www.gnu.org/copyleft/lesser.html
*/

#ifndef __GCHESS_H__
#define __GCHESS_H__

#define MAX_PIECE_MOVES 27

class GChessBoard
{
public:
	enum Piece
	{
		Pawn = 1,
		Bishop = 2,
		Knight = 3,
		Rook = 4,
		Queen = 5,
		King = 6,
		PieceMask = 7,
		WhiteMask = 8,
		AllMask = 15,
	};

protected:
	unsigned int m_rows[8];

public:
	inline Piece GetPiece(int col, int row, bool* pbWhite)
	{
		unsigned int i = (m_rows[row] >> (4 * col));
		*pbWhite = ((i & WhiteMask) ? true : false);
		return (Piece)(i & PieceMask);
	}

	inline void SetPiece(int col, int row, Piece piece, bool bWhite)
	{
		m_rows[row] &= ((~AllMask) << (4 * col));
		m_rows[row] |= ((piece | (bWhite ? WhiteMask : 0)) << (4 * col));
	}

	// Pass in the coordinates of a square with a piece on it
	// and it will return the number of moves that piece can make
	// and put the coordinates of the moves in pOutMoves (first
	// col, then row, so pOutMoves should be big enough to hold
	// 2 * MAX_PIECE_MOVES values)
	int GetMoves(int* pOutMoves, int col, int row);

protected:
	inline int Inc(int pos)
	{
		if(pos < 0 || pos >= 7)
			return -1;
		return pos + 1;
	}

	inline int Dec(int pos)
	{
		if(pos < 1)
			return -1;
		return pos -1;
	}

	bool CheckMove(int* pOutMoves, int* pnMoves, int col, int row, bool bWhite);
	bool CheckPawnMove(int* pOutMoves, int* pnMoves, int col, int row, bool bDiagonal, bool bWhite);
};

#endif // __GCHESS_H__