src/chess/game-info.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2016 Mike Becker. All rights reserved.
 *
 * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 *
 */

#ifndef GAME_INFO_H
#define GAME_INFO_H

#include <stdint.h>
#include <stdbool.h>

#define WHITE 0x10
#define BLACK 0x20
#define opponent_color(color) ((color)==WHITE?BLACK:WHITE)

#define PIECE_MASK 0x0F
#define COLOR_MASK 0x30

#define PAWN   0x01
#define ROOK   0x02
#define KNIGHT 0x03
#define BISHOP 0x04
#define QUEEN  0x05
#define KING   0x06

#define WPAWN   (WHITE|PAWN)
#define WROOK   (WHITE|ROOK)
#define WKNIGHT (WHITE|KNIGHT)
#define WBISHOP (WHITE|BISHOP)
#define WQUEEN  (WHITE|QUEEN)
#define WKING   (WHITE|KING)
#define BPAWN   (BLACK|PAWN)
#define BROOK   (BLACK|ROOK)
#define BKNIGHT (BLACK|KNIGHT)
#define BBISHOP (BLACK|BISHOP)
#define BQUEEN  (BLACK|QUEEN)
#define BKING   (BLACK|KING)

typedef uint8_t Board[8][8];

struct movetimeval {
    uint64_t tv_sec;
    int32_t tv_usec;
};

typedef struct {
    uint8_t piece;
    uint8_t fromfile;
    uint8_t fromrow;
    uint8_t tofile;
    uint8_t torow;
    uint8_t promotion;
    uint8_t check;
    uint8_t capture;
    struct movetimeval timestamp;
    struct movetimeval movetime;
    char string[8];
} Move;

typedef struct {
    uint8_t servercolor;
    uint8_t timecontrol;
    uint16_t time;
    uint16_t addtime;
} GameInfo;

typedef struct {
    Board board;
    Move* moves;
    /** capacity of the move array */
    unsigned movecapacity;
    /** number of (half-)moves (counting BOTH colors) */
    unsigned int movecount;
    bool checkmate;
    bool stalemate;
    bool remis;
    bool resign;
} GameState;


#define is_game_running(gamestate) !((gamestate)->checkmate || \
    (gamestate)->resign || (gamestate)->stalemate || (gamestate)->remis)

#define last_move(gamestate) \
    ((gamestate)->moves[(gamestate)->movecount-1])

/**
 * Initializes a game state and prepares the chess board.
 * @param gamestate the game state to initialize
 */
void gamestate_init(GameState *gamestate);

/**
 * Cleans up a game state and frees the memory for the movement list.
 * @param gamestate the game state to clean up
 */
void gamestate_cleanup(GameState *gamestate);

#endif