Files
chess/engine/include/bitboard.h
Josh c02ec7875d
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add-fen-loader (#5)
Reviewed-on: #5
Co-authored-by: Josh <josh@joshuaschuett.com>
Co-committed-by: Josh <josh@joshuaschuett.com>
2025-08-16 16:51:53 +00:00

58 lines
1.5 KiB
C

#pragma once
#include <stdint.h>
#include <stdbool.h>
#define FILE_A 0x0101010101010101ULL
#define FILE_B 0x0202020202020202ULL
#define FILE_C 0x0404040404040404ULL
#define FILE_D 0x0808080808080808ULL
#define FILE_E 0x1010101010101010ULL
#define FILE_F 0x2020202020202020ULL
#define FILE_G 0x4040404040404040ULL
#define FILE_H 0x8080808080808080ULL
#define RANK_1 0x00000000000000FFULL
#define RANK_2 0x000000000000FF00ULL
#define RANK_3 0x0000000000FF0000ULL
#define RANK_4 0x00000000FF000000ULL
#define RANK_5 0x000000FF00000000ULL
#define RANK_6 0x0000FF0000000000ULL
#define RANK_7 0x00FF000000000000ULL
#define RANK_8 0xFF00000000000000ULL
#define SET_BIT(bb, sq) ((bb) |= (1ULL << (sq)))
#define CLEAR_BIT(bb, sq) ((bb) &= ~(1ULL << (sq)))
#define GET_BIT(bb, sq) ((bb) & (1ULL << (sq)))
#define TOGGLE_BIT(bb, sq) ((bb) ^= (1ULL << (sq)))
enum Color { WHITE = 0, BLACK = 1, BOTH = 2 };
enum Piece {
P, N, B, R, Q, K, // 0..5 white
p, n, b, r, q, k // 6..11 black
};
enum Castling {
CASTLE_WK = 1 << 0,
CASTLE_WQ = 1 << 1,
CASTLE_BK = 1 << 2,
CASTLE_BQ = 1 << 3
};
struct Board {
uint64_t pieces[12]; // Each set of pieces get a bitboard for each player.
uint64_t occ[3]; // Color occupancy bitboards.
uint64_t king_square[2];
uint8_t castling_rights;
int ep_square;
enum Color side_to_move;
int halfmove_clock;
int fullmove_number;
};
void create_knight_attack_cache();
void create_pawn_attack_cache();
void create_king_attack_cache();
void print_board();