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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 =
WHITE_SHORT_CASTLE | WHITE_LONG_CASTLE |
BLACK_SHORT_CASTLE | BLACK_LONG_CASTLE,
.turn = WHITE_TURN,
.passantable_file = 0,
.halfmove_clock = 0,
.fullmove_clock = 1
};
}
void assert_valid_position(position_t position) {
assert(check_valid_position(position) == true);
}
bool check_valid_position(position_t position) {
if (position.castling >
(
WHITE_SHORT_CASTLE | WHITE_LONG_CASTLE |
BLACK_SHORT_CASTLE | BLACK_LONG_CASTLE
)
) return false;
if (position.turn != WHITE_TURN && position.turn != BLACK_TURN) return false;
if (position.passantable_file > 8) return false; // 0 means no passant
if (position.bitboards[WHITE_KING] == 0) return false;
if (position.bitboards[BLACK_KING] == 0) return false;
return true;
}
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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