/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Computer's algorithm
*/
#ifndef _H_ALGOR
#define _H_ALGOR
#include "player.h"
class BOARD;
class BOX;
class ALGOR : public PLAYER {
public:
ALGOR(const char c);
virtual ~ALGOR() {}
// Return a proposed move in (y, x, dir)
void play(const BOARD& b, size_t& y, size_t& x, int& dir);
private:
// Closure searches
int find_closure(size_t& y, size_t& x, int& dir, BOARD& b);
size_t find_max_closure(size_t& y, size_t& x, int& dir, const BOARD& b);
size_t find_min_closure1(size_t& y, size_t& x, int& dir, const BOARD& b,
int last);
size_t find_min_closure(size_t& y, size_t& x, int& dir, const BOARD& b);
// Move searches
int find_good_turn(size_t& y, size_t& x, int& dir, const BOARD& b);
int find_bad_turn(size_t& y, size_t& x, int& dir, BOARD& b, int last);
// Move Attempts
int try_bad_turn(BOX& box, size_t& y, size_t& x, int& dir, BOARD& b,
int last);
int try_good_turn(BOX& box, size_t y, size_t x, int& dir, BOARD& b);
