File: hash.h

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// hash.h

#ifndef HASH_H
#define HASH_H

// includes

#include "board.h"
#include "util.h"

// defines

#define RandomPiece          0
// 12 * 64
#define RandomCastle       768
// 4
#define RandomEnPassant    772
// 8
#define  RandomTurn        780
// 1

// functions

extern void   hash_init       ();

extern uint64 hash_key        (const board_t * board);

extern uint64 hash_piece_key  (int piece, int square);
extern uint64 hash_castle_key (int flags);
extern uint64 hash_ep_key     (int square);
extern uint64 hash_turn_key   (int colour);

extern uint64 hash_random_64  (int index);

#endif // !defined HASH_H

// end of hash.h