114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/* chessdefs.h - generic chess definitions.
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*
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* Copyright (C) 2021 Bruno Raoult ("br")
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* Licensed under the GNU General Public License v3.0 or later.
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* Some rights reserved. See COPYING.
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*
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* You should have received a copy of the GNU General Public License along with this
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* program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
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*
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*/
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#ifndef _CHESSDEFS_H
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#define _CHESSDEFS_H
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#include "brlib.h" /* brlib types */
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#define mask(i) ( 1ULL << (i) )
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#define C64(const_u64) const_u64##ULL
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#define U64(const_s64) const_s64##LL
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/* piece_t bits structure
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* piece is on bits 1-3, color on bit 4:
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* .... CPPP
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* C: 0 for white, 1: black
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* PPP: pawn (1), knight, bishop, rook, queen, king (6)
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*/
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typedef enum {
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WHITE, BLACK,
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COLOR_MAX
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} color_t;
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typedef enum {
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ALL_PIECES = 0, /* 'all pieces' bitboard */
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PAWN = 1, KNIGHT, BISHOP, ROOK, QUEEN, KING,
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PIECE_TYPE_MAX = 7 /* bit 4 */
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} piece_type_t;
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typedef enum {
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EMPTY,
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W_PAWN = PAWN, W_KNIGHT, W_BISHOP, W_ROOK, W_QUEEN, W_KING,
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B_PAWN = PAWN | 8, B_KNIGHT, B_BISHOP, B_ROOK, B_QUEEN, B_KING,
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PIECE_MAX
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} piece_t;
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#define OPPONENT(p) !(p)
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#define MASK_PIECE 0x07 /* 00000111 */
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#define MASK_COLOR 0x08 /* 00001000 */
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#define COLOR(p) ((p) >> 3) /* bitmask */
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#define PIECE(p) ((p) & MASK_PIECE)
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#define MAKE_PIECE(p, c) ((p) | (c) << 3)
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#define IS_WHITE(p) (!COLOR(p))
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#define IS_BLACK(p) (COLOR(p))
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#define SET_WHITE(p) ((p) &= ~MASK_COLOR)
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#define SET_BLACK(p) ((p) |= MASK_COLOR)
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#define SET_COLOR(p, c) (!(c)? SET_WHITE(p): SET_BLACK(p))
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/* flip a 0-63 square:
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* Vertical: G8 (62) becomes G1 (6)
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* Horizontal: G8 (62) becomes B8 (57)
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*/
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#define FLIP_V(sq) ((sq) ^ 56)
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#define FLIP_H(sq) ((sq) ^ 7)
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typedef u64 bitboard;
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typedef ushort board;
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#define BOARDSIZE (8*8)
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/* from human to machine */
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#define C2FILE(c) (tolower(c) - 'a')
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#define C2RANK(c) (tolower(c) - '1')
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/* from machine to human */
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#define FILE2C(f) ((f) + 'a')
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#define RANK2C(r) ((r) + '1')
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/* castle_t bits structure
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*/
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typedef enum {
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CASTLE_WK = (1 << 0), /* 0x01 00000001 */
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CASTLE_WQ = (1 << 1), /* 0x02 00000010 */
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CASTLE_BK = (1 << 2), /* 0x04 00000100 */
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CASTLE_BQ = (1 << 3), /* 0x08 00001000 */
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} castle_rights_t;
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#define CASTLE_W (CASTLE_WK | CASTLE_WQ) /* 00000011 W castle mask */
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#define CASTLE_B (CASTLE_BK | CASTLE_BQ) /* 00001100 B castle mask */
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/* game phases
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*/
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#define OPENING 0
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#define MIDDLEGAME 1
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#define ENDGAME 2
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/* bitboard
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*/
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//typedef u64 bitboard_t;
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/* eval type
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*/
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//typedef s32 eval_t;
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/* forward typedefs
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*/
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//typedef struct piece_list_s piece_list_t;
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//typedef struct board_s board_t;
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//typedef struct pos_s pos_t;
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//typedef struct move_s move_t;
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#endif /* _CHESSDEFS_H */
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