src/game.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2014 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_H
#define	GAME_H

#include "terminal-chess.h"
#include <stdint.h>

#ifdef	__cplusplus
extern "C" {
#endif

#define PIECE_MASK       0x0F
#define COLOR_MASK       0x30
#define ENPASSANT_THREAT 0x40

#define WHITE 0x10
#define BLACK 0x20

#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];

typedef struct {
    uint8_t piece;
    uint8_t fromfile;
    uint8_t fromrow;
    uint8_t tofile;
    uint8_t torow;
    _Bool check;
    _Bool checkmate;
    _Bool capture;
} Move;

#define POS_UNSPECIFIED UINT8_MAX
#define mdst(b,m) b[m->torow][m->tofile]
#define msrc(b,m) b[m->fromrow][m->fromfile]

#define isidx(idx) ((uint8_t)idx < 8)

#define isfile(file) (file >= 'a' && file <= 'h')
#define isrow(row) (row >= '1' && row <= '8')

#define rowidx(row) (row-'1')
#define fileidx(file) (file-'a')

#define chkidx(move) (isidx(move->fromfile) && isidx(move->fromrow) && \
        isidx(move->tofile) && isidx(move->torow))

/* secure versions - use, if index is not checked with isidx() */
#define fileidx_s(c) (isfile(c)?fileidx(c):POS_UNSPECIFIED)
#define rowidx_s(c) (isrow(c)?rowidx(c):POS_UNSPECIFIED)

void game_start(Settings *settings, int opponent);

#ifdef	__cplusplus
}
#endif

#endif	/* GAME_H */