23d9812273
struct plugin_api *rb is declared in PLUGIN_HEADER, and pointed to by __header.api the loader uses this pointer to initialize rb before calling entry_point entry_point is no longer passed a pointer to the plugin API all plugins, and pluginlib functions, are modified to refer to the global rb pluginlib functions which only served to copy the API pointer are removed git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19776 a1c6a512-1295-4272-9138-f99709370657
82 lines
3 KiB
C
82 lines
3 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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} 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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