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#include "bitboard.h"
#include <stdio.h>
#include <inttypes.h>
#include <assert.h>
position_t position_starting() {
return (position_t) {
.bitboards = {
16ULL,
8ULL,
129ULL,
36ULL,
66ULL,
65280ULL,
1152921504606846976ULL,
576460752303423488ULL,
9295429630892703744ULL,
2594073385365405696ULL,
4755801206503243776ULL,
71776119061217280ULL,
},
.castling =
(1 << WHITE_SHORT_CASTLE) |
(1 << WHITE_LONG_CASTLE) |
(1 << BLACK_SHORT_CASTLE) |
(1 << BLACK_LONG_CASTLE),
.turn = WHITE_TURN,
.passantable_column = 0,
};
}
void assert_valid_position(position_t position) {
assert(position.castling <=
(
(1 << WHITE_SHORT_CASTLE) |
(1 << WHITE_LONG_CASTLE) |
(1 << BLACK_SHORT_CASTLE) |
(1 << BLACK_LONG_CASTLE)
)
);
assert(position.turn == WHITE_TURN || position.turn == BLACK_TURN);
assert(position.passantable_column <= 8);
assert(position.bitboards[WHITE_KING] != 0);
assert(position.bitboards[BLACK_KING] != 0);
}
bitboard_t whites(position_t position) {
return
position.bitboards[WHITE_KING] |
position.bitboards[WHITE_QUEEN] |
position.bitboards[WHITE_ROOK] |
position.bitboards[WHITE_BISHOP] |
position.bitboards[WHITE_KNIGHT] |
position.bitboards[WHITE_PAWN];
}
bitboard_t blacks(position_t position) {
return
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_bitboard(bitboard_t bitboard) {
printf("Bitboard(%" PRIu64 ")\n", bitboard);
for (int i = 7; i >= 0; i--) {
for (int j = 0; j < 8; j++) {
printf("%" PRIu64 "", (bitboard >> (8 * i + j)) & 1);
}
printf("\n");
}
}
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