Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <cassert>
#include <cstddef> // For offsetof()
+#include <deque>
+#include <memory> // For std::unique_ptr
#include <string>
+#include <vector>
#include "bitboard.h"
#include "types.h"
class Position;
-struct Thread;
+class Thread;
namespace PSQT {
void init();
}
-/// CheckInfo struct is initialized at constructor time and keeps info used to
+/// CheckInfo struct is initialized at constructor time and keeps info used to
/// detect if a move gives check.
struct CheckInfo {
StateInfo* previous;
};
+// In a std::deque references to elements are unaffected upon resizing
+typedef std::unique_ptr<std::deque<StateInfo>> StateListPtr;
+
/// Position class stores information regarding the board representation as
/// pieces, side to move, hash keys, castling info, etc. Important methods are
public:
static void init();
- Position() = default; // To define the global object RootPos
+ Position() = default;
Position(const Position&) = delete;
- Position(const Position& pos, Thread* th) { *this = pos; thisThread = th; }
- Position(const std::string& f, bool c960, Thread* th) { set(f, c960, th); }
- Position& operator=(const Position&); // To assign RootPos from UCI
+ Position& operator=(const Position&) = delete;
// FEN string input/output
- void set(const std::string& fenStr, bool isChess960, Thread* th);
+ Position& set(const std::string& fenStr, bool isChess960, StateInfo* si, Thread* th);
const std::string fen() const;
// Position representation
Bitboard attacks_from(Piece pc, Square s) const;
template<PieceType> Bitboard attacks_from(Square s) const;
template<PieceType> Bitboard attacks_from(Square s, Color c) const;
+ Bitboard slider_blockers(Bitboard target, Bitboard sliders, Square s) const;
// Properties of moves
bool legal(Move m, Bitboard pinned) const;
private:
// Initialization helpers (used while setting up a position)
- void clear();
void set_castling_right(Color c, Square rfrom);
void set_state(StateInfo* si) const;
// Other helpers
- Bitboard check_blockers(Color c, Color kingColor) const;
void put_piece(Color c, PieceType pt, Square s);
void remove_piece(Color c, PieceType pt, Square s);
void move_piece(Color c, PieceType pt, Square from, Square to);
int castlingRightsMask[SQUARE_NB];
Square castlingRookSquare[CASTLING_RIGHT_NB];
Bitboard castlingPath[CASTLING_RIGHT_NB];
- StateInfo startState;
uint64_t nodes;
int gamePly;
Color sideToMove;
}
inline Bitboard Position::discovered_check_candidates() const {
- return check_blockers(sideToMove, ~sideToMove);
+ return slider_blockers(pieces(sideToMove), pieces(sideToMove), square<KING>(~sideToMove));
}
inline Bitboard Position::pinned_pieces(Color c) const {
- return check_blockers(c, c);
+ return slider_blockers(pieces(c), pieces(~c), square<KING>(c));
}
inline bool Position::pawn_passed(Color c, Square s) const {