//// Includes
////
+#include <algorithm>
#include <cassert>
#include <cstring>
#include <fstream>
using std::cout;
using std::endl;
+static inline bool isZero(char c) { return c == '0'; }
+
struct PieceLetters : std::map<char, Piece> {
PieceLetters() {
operator[]('B') = WB; operator[]('b') = BB;
operator[]('N') = WN; operator[]('n') = BN;
operator[]('P') = WP; operator[]('p') = BP;
+ operator[](' ') = EMPTY; operator[]('.') = EMPTY_BLACK_SQ;
+ }
+
+ char from_piece(Piece p) const {
+
+ std::map<char, Piece>::const_iterator it;
+ for (it = begin(); it != end(); ++it)
+ if (it->second == p)
+ return it->first;
+
+ assert(false);
+ return 0;
}
};
Score Position::PieceSquareTable[16][64];
-static bool RequestPending = false;
+static PieceLetters pieceLetters;
/// Constructors
6) Fullmove number: The number of the full move. It starts at 1, and is incremented after Black's move.
*/
- static PieceLetters pieceLetters;
-
char token;
std::istringstream ss(fen);
Rank rank = RANK_8;
}
-/// Position::to_fen() converts the position object to a FEN string. This is
-/// probably only useful for debugging.
+/// Position::to_fen() returns a FEN representation of the position. In case
+/// of Chess960 the Shredder-FEN notation is used. Mainly a debugging function.
const string Position::to_fen() const {
- static const string pieceLetters = " PNBRQK pnbrqk";
string fen;
- int skip;
+ Square sq;
+ char emptyCnt = '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)
+ sq = make_square(file, rank);
+
+ if (square_is_occupied(sq))
{
- fen += (char)skip + '0';
- skip = 0;
- }
- fen += pieceLetters[piece_on(sq)];
+ fen += emptyCnt;
+ fen += pieceLetters.from_piece(piece_on(sq));
+ emptyCnt = '0';
+ } else
+ emptyCnt++;
}
- if (skip > 0)
- fen += (char)skip + '0';
-
- fen += (rank > RANK_1 ? '/' : ' ');
+ fen += emptyCnt;
+ fen += '/';
+ emptyCnt = '0';
}
- fen += (sideToMove == WHITE ? "w " : "b ");
+
+ fen.erase(std::remove_if(fen.begin(), fen.end(), isZero), fen.end());
+ fen.erase(--fen.end());
+ fen += (sideToMove == WHITE ? " w " : " b ");
+
if (st->castleRights != NO_CASTLES)
{
- if (initialKFile == FILE_E && initialQRFile == FILE_A && initialKRFile == FILE_H)
- {
- 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
- {
- if (can_castle_kingside(WHITE))
- fen += char(toupper(file_to_char(initialKRFile)));
- if (can_castle_queenside(WHITE))
- fen += char(toupper(file_to_char(initialQRFile)));
- if (can_castle_kingside(BLACK))
- fen += file_to_char(initialKRFile);
- if (can_castle_queenside(BLACK))
- fen += file_to_char(initialQRFile);
- }
- } else
- fen += '-';
+ const bool Chess960 = initialKFile != FILE_E
+ || initialQRFile != FILE_A
+ || initialKRFile != FILE_H;
- fen += ' ';
- if (ep_square() != SQ_NONE)
- fen += square_to_string(ep_square());
- else
+ if (can_castle_kingside(WHITE))
+ fen += Chess960 ? char(toupper(file_to_char(initialKRFile))) : 'K';
+
+ if (can_castle_queenside(WHITE))
+ fen += Chess960 ? char(toupper(file_to_char(initialQRFile))) : 'Q';
+
+ if (can_castle_kingside(BLACK))
+ fen += Chess960 ? file_to_char(initialKRFile) : 'k';
+
+ if (can_castle_queenside(BLACK))
+ fen += Chess960 ? file_to_char(initialQRFile) : 'q';
+ } else
fen += '-';
+ fen += (ep_square() == SQ_NONE ? " -" : " " + square_to_string(ep_square()));
return fen;
}
/// Position::print() prints an ASCII representation of the position to
/// the standard output. If a move is given then also the san is print.
-void Position::print(Move m) const {
+void Position::print(Move move) const {
- static const string pieceLetters = " PNBRQK PNBRQK .";
+ const char* dottedLine = "\n+---+---+---+---+---+---+---+---+\n";
+ static bool requestPending = false;
// Check for reentrancy, as example when called from inside
// MovePicker that is used also here in move_to_san()
- if (RequestPending)
+ if (requestPending)
return;
- RequestPending = true;
+ requestPending = true;
- cout << endl;
- if (m != MOVE_NONE)
+ if (move)
{
Position p(*this, thread());
- string col = (color_of_piece_on(move_from(m)) == BLACK ? ".." : "");
- cout << "Move is: " << col << move_to_san(p, m) << endl;
+ string dd = (color_of_piece_on(move_from(move)) == BLACK ? ".." : "");
+ cout << "\nMove is: " << dd << move_to_san(p, move);
}
+
for (Rank rank = RANK_8; rank >= RANK_1; rank--)
{
- cout << "+---+---+---+---+---+---+---+---+" << endl;
+ cout << dottedLine << '|';
for (File file = FILE_A; file <= FILE_H; file++)
{
Square sq = make_square(file, rank);
+ char c = (color_of_piece_on(sq) == BLACK ? '=' : ' ');
Piece piece = piece_on(sq);
- if (piece == EMPTY && square_color(sq) == WHITE)
- piece = NO_PIECE;
- char col = (color_of_piece_on(sq) == BLACK ? '=' : ' ');
- cout << '|' << col << pieceLetters[piece] << col;
+ if (piece == EMPTY && square_color(sq) == BLACK)
+ piece = EMPTY_BLACK_SQ;
+
+ cout << c << pieceLetters.from_piece(piece) << c << '|';
}
- cout << '|' << endl;
}
- cout << "+---+---+---+---+---+---+---+---+" << endl
- << "Fen is: " << to_fen() << endl
- << "Key is: " << st->key << endl;
-
- RequestPending = false;
+ cout << dottedLine << "Fen is: " << to_fen() << "\nKey is: " << st->key << endl;
+ requestPending = false;
}
projects / stockfish / blobdiff