141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
/* piece.h - piece definitions.
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*
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* Copyright (C) 2021-2024 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 PIECE_H
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#define PIECE_H
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#include <string.h>
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#include "chessdefs.h"
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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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NO_PIECE_TYPE = 0,
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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 __piece_e {
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EMPTY = 0,
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NO_PIECE = 0,
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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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/* default values for opening, midgame, endgame
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*/
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#define E_VAL_OPN 0 /* empty */
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#define P_VAL_OPN 100
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#define N_VAL_OPN 300
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#define B_VAL_OPN 300
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#define R_VAL_OPN 500
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#define Q_VAL_OPN 900
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#define K_VAL_OPN 20000
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#define E_VAL_MID 0
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#define P_VAL_MID 100
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#define N_VAL_MID 300
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#define B_VAL_MID 300
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#define R_VAL_MID 500
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#define Q_VAL_MID 900
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#define K_VAL_MID 20000
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#define E_VAL_END 0
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#define P_VAL_END 100
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#define N_VAL_END 300
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#define B_VAL_END 300
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#define R_VAL_END 500
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#define Q_VAL_END 900
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#define K_VAL_END 20000
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/* some default values for pieces
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* @abbr: char, piece capital letter (used for game notation)
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* @abbr_c: char, capital for white, lowercase for black
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* char *sym;
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* char *sym_c;
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* char *name;
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* s64 opn_value;
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* s64 mid_value;
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* s64 end_value;
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*/
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extern const struct piece_details {
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char *cap; /* used for game notation */
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char *low; /* used also for UCI promotion */
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char *fen; /* cap=white, low=black */
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char *sym; /* UTF-8 symbol */
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char *name; /* piece name */
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s64 opn_value; /* value opening */
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s64 mid_value; /* value midgame */
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s64 end_value; /* value endgame */
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} piece_details[PIECE_MAX];
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extern const char pieces_str[6+6+1]; /* to search from fen/user input */
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#define OPPONENT(color) !(color)
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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) (piece_t)((p) &= ~MASK_COLOR)
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#define SET_BLACK(p) (piece_t)((p) |= MASK_COLOR)
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#define SET_COLOR(p, c) (piece_t)(!(c)? SET_WHITE(p): SET_BLACK(p))
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bool piece_ok(piece_t p);
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char *piece_to_cap(piece_t p);
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char *piece_to_low(piece_t p);
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char *piece_to_fen(piece_t p);
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char *piece_to_sym(piece_t p);
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char *piece_to_name(piece_t p);
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#define piece_to_char(c) piece_to_fen(c)
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//#define piece_to_char_t(p) piece_to_uci(p)
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//piece_type_t char_to_piece(char c);
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piece_type_t piece_t_from_char(char c);
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piece_t piece_from_fen(char c);
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#define piece_from_char(c) piece_from_fen(c)
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/* use short name or symbol - no effect
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*/
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#define P_USE_UTF 1
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//void piece_list_print(struct list_head *list);
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//pool_t *piece_pool_init();
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//void piece_pool_stats();
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//piece_list_t *piece_add(pos_t *pos, piece_t piece, square_t square);
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//void piece_del(struct list_head *ptr);
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//int pieces_del(pos_t *pos, short color);
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#endif
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