2acc0ac542
later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2006 Alexander Levin
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _REVERSI_GAME_H
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#define _REVERSI_GAME_H
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#include <stdbool.h>
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#include "plugin.h"
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#define WHITE 1 /* WHITE constant, it always plays first (as in chess) */
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#define BLACK -1 /* BLACK constant */
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#define FREE 0 /* Free place constant */
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#define BOARD_SIZE 8
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#define INIT_STONES 4
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/* Description of a move. A move is stored as a byte in the following format:
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* - bit 7 : 0 for valid entries (i.e. those containing a move info,
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* 1 for invalid entries
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* - bits 6..4: row
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* - bit 3 : 0 if it's white move, 1 if it's black move
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* - bits 2..0: column
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*/
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typedef unsigned char move_t;
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#define MOVE_ROW(h) (((h) >> 4) & 0x7)
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#define MOVE_COL(h) ((h) & 0x7)
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#define MOVE_PLAYER(h) (((h) & 0x8) ? BLACK : WHITE)
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#define MAKE_MOVE(r,c,player) ( ((r)<<4) | ((c)&0x7) | \
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((player) == WHITE ? 0 : 0x8) )
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#define MOVE_INVALID 0x80
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/* State of a board */
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typedef struct _reversi_board_t {
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/* The current state of the game (BLACK/WHITE/FREE) */
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int board[BOARD_SIZE][BOARD_SIZE];
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/* Game history. First move (mostly, but not necessarily, black) is stored
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* in history[0], second move (mostly, but not necessarily, white) is
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* stored in history[1] etc.
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*/
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move_t history[BOARD_SIZE*BOARD_SIZE - INIT_STONES];
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const struct plugin_api *rb;
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} reversi_board_t;
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void reversi_init_game(reversi_board_t *game);
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int reversi_flipped_color(const int color);
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bool reversi_game_is_finished(const reversi_board_t *game, int cur_player);
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int reversi_count_occupied_cells(const reversi_board_t *game,
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int *white_count, int *black_count);
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int reversi_count_moves(const reversi_board_t *game);
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int reversi_count_white_moves(const reversi_board_t *game);
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int reversi_count_black_moves(const reversi_board_t *game);
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int reversi_make_move(reversi_board_t *game, const int row,
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const int col, const int player);
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int reversi_is_valid_move(const reversi_board_t *game,
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const int row, const int col, const int player);
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int reversi_count_player_available_moves(const reversi_board_t *game,
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const int player);
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int reversi_count_passes(const reversi_board_t *game, const int player);
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#endif
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