Bitboard.h

/*
 * 
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef BITBOARD_H
#define BITBOARD_H

#include <stdint.h>
#include "Square.h"

class Bitboard
{
public:
  Bitboard();

  Bitboard(unsigned char squares[64]);
  Bitboard(Square sq)
  {
    member.i = 0;
    set(sq.row, sq.col);
  }

  ~Bitboard() {}

  unsigned char getRank(int n)
  {
    return member.c[n];
  }

  void setRank(int n, unsigned char c)
  {
    member.c[n] = c;
  }

  bool test(int rank, int file)
  {
    return (bool) (member.c[rank] & (0x80 >> file));
  }

  bool clear(int rank, int file)
  {
    member.c[rank] &= ~(0x80 >> file);
  }

  bool set(int rank, int file)
  {
    member.c[rank] |= 0x80 >> file;
  }
  
  void clear()
  {
    member.i = 0;
  }

  bool empty()
  {
    return member.i == 0;
  }

  void flip();
  
  void rotate180();

  unsigned char getDiagonalRank45(int rank, int file, int *newFile);
  unsigned char getDiagonalRank315(int rank, int file, int *newFile);
  void setDiagonalRank45(int rank, int file, unsigned char newRank);
  void setDiagonalRank315(int rank, int file, unsigned char newRank);
  
  void shift(int colOffset, int rowOffset);
  
  Square getAndClearFirstSetBit();
  
  void print();

  Bitboard operator|(Bitboard b2);
  Bitboard operator&(Bitboard b2);
  Bitboard operator xor(Bitboard b2);
  Bitboard operator~();
  operator bool();

private:
  union
  {
    uint64_t i;
    unsigned char c[8];
  } member;
};

#endif