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#ifndef BITBOARD_H
#define BITBOARD_H
#include "ints.h"
#include <stdbool.h>
typedef u64 bitboard_t;
enum {
WHITE_KING,
WHITE_QUEEN,
WHITE_ROOK,
WHITE_BISHOP,
WHITE_KNIGHT,
WHITE_PAWN,
BLACK_KING,
BLACK_QUEEN,
BLACK_ROOK,
BLACK_BISHOP,
BLACK_KNIGHT,
BLACK_PAWN,
PIECE_TYPE_COUNT,
};
enum {
WHITE_SHORT_CASTLE = 1 << 0,
WHITE_LONG_CASTLE = 1 << 1,
BLACK_SHORT_CASTLE = 1 << 2,
BLACK_LONG_CASTLE = 1 << 3,
CASTLE_COUNT = 4,
};
enum {
WHITE_TURN,
BLACK_TURN,
TURN_COUNT,
};
#define BITMASK_RANK_1 255ULL
#define BITMASK_RANK_2 65280ULL
#define BITMASK_RANK_3 16711680ULL
#define BITMASK_RANK_4 4278190080ULL
#define BITMASK_RANK_5 1095216660480ULL
#define BITMASK_RANK_6 280375465082880ULL
#define BITMASK_RANK_7 71776119061217280ULL
#define BITMASK_RANK_8 18374686479671623680ULL
#define BITMASK_FILE_A 72340172838076673ULL
#define BITMASK_FILE_B 144680345676153346ULL
#define BITMASK_FILE_C 289360691352306692ULL
#define BITMASK_FILE_D 578721382704613384ULL
#define BITMASK_FILE_E 1157442765409226768ULL
#define BITMASK_FILE_F 2314885530818453536ULL
#define BITMASK_FILE_G 4629771061636907072ULL
#define BITMASK_FILE_H 9259542123273814144ULL
#define occupied_by(bitboard, index) (bitboard & ((bitboard_t)1 << index))
typedef struct {
bitboard_t bitboards[PIECE_TYPE_COUNT];
u8 castling;
u8 turn;
u8 passantable_file;
u16 halfmove_clock;
u16 fullmove_clock;
} position_t;
position_t position_starting();
void assert_valid_position(position_t position);
bool check_valid_position(position_t position);
#define whites(position) \
position.bitboards[WHITE_KING] | \
position.bitboards[WHITE_QUEEN] | \
position.bitboards[WHITE_ROOK] | \
position.bitboards[WHITE_BISHOP] | \
position.bitboards[WHITE_KNIGHT] | \
position.bitboards[WHITE_PAWN]
#define blacks(position) \
position.bitboards[BLACK_KING] | \
position.bitboards[BLACK_QUEEN] | \
position.bitboards[BLACK_ROOK] | \
position.bitboards[BLACK_BISHOP] | \
position.bitboards[BLACK_KNIGHT] | \
position.bitboards[BLACK_PAWN]
void print_position(position_t position);
void print_bitboard(bitboard_t bitboard);
#endif // BITBOARD_H
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