Value Position::MgPieceSquareTable[16][64];
Value Position::EgPieceSquareTable[16][64];
+const Piece_attacks_fn piece_attacks_fn[] =
+ { 0, 0,
+ &Position::knight_attacks,
+ &Position::bishop_attacks,
+ &Position::rook_attacks,
+ &Position::queen_attacks,
+ &Position::king_attacks };
////
//// Functions
void Position::from_fen(const std::string &fen) {
- static const std::string piecesStr = "KQRBNPkqrbnp";
+ static const std::string pieceLetters = "KQRBNPkqrbnp";
static const Piece pieces[] = { WK, WQ, WR, WB, WN, WP, BK, BQ, BR, BB, BN, BP };
clear();
rank--;
continue;
}
- size_t idx = piecesStr.find(fen[i]);
+ size_t idx = pieceLetters.find(fen[i]);
if (idx == std::string::npos)
{
std::cout << "Error in FEN at character " << i << std::endl;
// Side to move
i++;
- if (fen[i] != 'w' && fen[i] == 'b')
+ if (fen[i] != 'w' && fen[i] != 'b')
{
std::cout << "Error in FEN at character " << i << std::endl;
return;
/// probably only useful for debugging.
const std::string Position::to_fen() const {
- char pieceLetters[] = " PNBRQK pnbrqk";
- std::string result;
+
+ static const std::string pieceLetters = " PNBRQK pnbrqk";
+ std::string fen;
int skip;
- for(Rank rank = RANK_8; rank >= RANK_1; rank--) {
- skip = 0;
- for(File file = FILE_A; file <= FILE_H; file++) {
- Square square = make_square(file, rank);
- if(square_is_occupied(square)) {
- if(skip > 0) result += (char)skip + '0';
- result += pieceLetters[piece_on(square)];
- skip = 0;
+ for (Rank rank = RANK_8; rank >= RANK_1; rank--)
+ {
+ skip = 0;
+ for (File file = FILE_A; file <= FILE_H; file++)
+ {
+ Square sq = make_square(file, rank);
+ if (!square_is_occupied(sq))
+ { skip++;
+ continue;
+ }
+ if (skip > 0)
+ {
+ fen += (char)skip + '0';
+ skip = 0;
+ }
+ fen += pieceLetters[piece_on(sq)];
}
- else skip++;
- }
- if(skip > 0) result += (char)skip + '0';
- result += (rank > RANK_1)? '/' : ' ';
- }
+ if (skip > 0)
+ fen += (char)skip + '0';
- result += (sideToMove == WHITE)? 'w' : 'b';
- result += ' ';
- if(castleRights == NO_CASTLES) result += '-';
- else {
- if(can_castle_kingside(WHITE)) result += 'K';
- if(can_castle_queenside(WHITE)) result += 'Q';
- if(can_castle_kingside(BLACK)) result += 'k';
- if(can_castle_queenside(BLACK)) result += 'q';
+ fen += (rank > RANK_1 ? '/' : ' ');
}
+ fen += (sideToMove == WHITE ? 'w' : 'b') + ' ';
+ if (castleRights != NO_CASTLES)
+ {
+ if (can_castle_kingside(WHITE)) fen += 'K';
+ if (can_castle_queenside(WHITE)) fen += 'Q';
+ if (can_castle_kingside(BLACK)) fen += 'k';
+ if (can_castle_queenside(BLACK)) fen += 'q';
+ } else
+ fen += '-';
+
+ fen += ' ';
+ if (ep_square() != SQ_NONE)
+ fen += square_to_string(ep_square());
+ else
+ fen += '-';
- result += ' ';
- if(ep_square() == SQ_NONE) result += '-';
- else result += square_to_string(ep_square());
-
- return result;
+ return fen;
}