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#ifndef MOVES_H
#define MOVES_H
#include "ints.h"
#include "bitboard.h"
typedef u8 square_t;
// think about the chess move notation
// e4, Nf6, Qh3+, Qe1#, a8=Q, i need to store the information needed to
// recreate this in move_t
enum {
MOVE_CAPTURE = 1,
MOVE_SHORT_CASTLE = 1 << 1,
MOVE_LONG_CASTLE = 1 << 2,
// technically these promotation flags can be compressed to only use 2 bits..
MOVE_PROMOTE_Q = 1 << 3, // 1 << 5
MOVE_PROMOTE_R = 1 << 4, // 2 << 5
MOVE_PROMOTE_B = 1 << 5, // 3 << 5
MOVE_PROMOTE_N = 1 << 6, // 4 << 5 ? nvm it uses 3
MOVE_EN_PASSANT = 1 << 7,
MOVE_CHECK = 1 << 8,
};
typedef struct {
square_t from;
square_t to;
u16 flags;
} move_t;
void position_make_move(position_t *position, move_t move);
typedef struct {
move_t *moves;
u32 length;
u32 capacity;
} moves_t;
void moves_init(moves_t *moves);
void moves_deinit(moves_t moves);
void moves_init_wcapacity(moves_t *moves, u32 capacity);
moves_t moves_empty();
struct add_move_params {
u16 flags;
};
#define add_move(moves, from, to, ...) _add_move(\
moves, \
from, \
to, \
(struct add_move_params) { .flags = 0, __VA_ARGS__ }\
)
void _add_move(
moves_t *moves,
square_t from,
square_t to,
struct add_move_params params
);
void get_pawn_moves(moves_t *moves, position_t position);
void get_knight_moves(moves_t *moves, position_t position);
void get_king_moves(moves_t *moves, position_t position);
void get_rook_moves(moves_t *moves, position_t position);
void get_bishop_moves(moves_t *moves, position_t position);
void get_queen_moves(moves_t *moves, position_t position);
void get_moves(moves_t *moves, position_t position);
bool square_attacked(position_t position, square_t square, u8 by_color);
void get_legal_moves(moves_t *moves, position_t position);
int find_piece_on_square(position_t* p, int square);
#ifdef MOVES_INTERNAL
void __forloop_rook_moves_gen(
moves_t *moves,
bitboard_t friendly_type,
bitboard_t friendly_pieces,
bitboard_t enemy_pieces
);
void __forloop_bishop_moves_gen(
moves_t *moves,
bitboard_t friendly_type,
bitboard_t friendly_pieces,
bitboard_t enemy_pieces
);
#endif // MOVES_INTERNAL
#endif // !MOVES_H
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