/* This may look like c to you, but it's really -*-c++-*- */

/*   GMA or "The Go-moku Apprentice" is a go-moku implementation that learns
 *   the game from its own (and its opponents') mistakes.
 *   Copyright (C) 1998 Johan Walles (d92-jwa@nada.kth.se)
 *
 *   This program is free software; you can redistribute it and/or modify 
 *   it under the terms of the GNU General Public License as published by 
 *   the Free Software Foundation; either version 2 of the License, or 
 *   (at your option) any later version. 
 *
 *   This program is distributed in the hope that it will be useful, 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */

#ifndef PATTERN_H
#define PATTERN_H

#include <string.h>

#define PATTERN_EMPTY     0
#define PATTERN_MINE      1
#define PATTERN_YOURS     2
#define PATTERN_DONTCARE  3

class Pattern
{
public:
  bool operator==(const Pattern p2) const
    { return memcmp(chars, p2.chars, 8) == 0; }

  bool operator<(const Pattern p2) const
    { return memcmp(chars, p2.chars, 8) < 0; }

  unsigned char & operator[](const int i)
    { return chars[i]; }

  unsigned char get_char(const int i) const
    { return chars[i]; }
  
  unsigned char * tochars()
    { return chars; }

  void fromchars(unsigned char inchars[8])
    { memcpy(chars, inchars, 8); }

  unsigned int nth_axis(int n) const
    {
      return ((chars[2 * n]) << 8) + chars[2 * n + 1];
    }
  
  bool null() const
    {
      return !(chars[0] ||
	       chars[1] ||
	       chars[2] ||
	       chars[3] ||
	       chars[4] ||
	       chars[5] ||
	       chars[6] ||
	       chars[7]);
    }

  int winner() const;
  
protected:
  unsigned char chars[8];
};

#endif // ifndef PATTERN_H