stego.git

/* stego - chess engine
 * Copyright (C) 2025 ArcNyxx <me@arcnyxx.net>
 * see LICENCE file for licensing information */

#ifndef STEGO_H
#define STEGO_H

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

typedef uint64_t u64;
typedef int sq_t;

typedef enum piece {
	KING, QUEEN, ROOK, BISHOP, KNIGHT, PAWN, NONE
} piece_t;

typedef enum flag {
	PQUEEN, PROOK, PBISHOP, PKNIGHT, NONE;
} flag_t;

typedef struct move {
	sq_t from : 5, to : 5;
	piece_t moved : 3;
	flag_t flag : 3;
} move_t;

typedef struct tether {
	u64 mask1, mask2;
	piece_t piece1 : 3, piece2 : 3;
	sq_t enpassant : 5;
	bool wkcastle : 1, wqcastle : 1, bkcastle : 1, bqcastle : 1;
	bool white1 : 1, white2 : 1;
} tether_t;

typedef struct board {
	u64 wking, wqueen, wrook, wbishop, wknight, wpawn;
	u64 bking, bqueen, brook, bbishop, bknight, bpawn;
	u64 friend, enemy, occupied;

	sq_t enpassant;
	bool wkcastle : 1, wqcastle : 1, bkcastle : 1, bqcastle : 1;
	bool white : 1;
} board_t;

#endif /* STEGO_H */