+++ /dev/null
-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, 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
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- Stockfish is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#if !defined(PAWNS_H_INCLUDED)
-#define PAWNS_H_INCLUDED
-
-#include "misc.h"
-#include "position.h"
-#include "types.h"
-
-namespace Pawns {
-
-/// Pawns::Entry contains various information about a pawn structure. Currently,
-/// it only includes a middle game and end game pawn structure evaluation, and a
-/// bitboard of passed pawns. We may want to add further information in the future.
-/// A lookup to the pawn hash table (performed by calling the probe function)
-/// returns a pointer to an Entry object.
-
-struct Entry {
-
- Score pawns_value() const { return value; }
- Bitboard pawn_attacks(Color c) const { return pawnAttacks[c]; }
- Bitboard passed_pawns(Color c) const { return passedPawns[c]; }
- int file_is_half_open(Color c, File f) const { return halfOpenFiles[c] & (1 << int(f)); }
- int pawns_on_same_color_squares(Color c, Square s) const { return pawnsOnSquares[c][!!(BlackSquares & s)]; }
- int has_open_file_on_side(Color c, File f, bool left) const {
- return halfOpenFiles[c] & (left ? ((1 << int(f)) - 1) : ~((1 << int(f+1)) - 1));
- }
-
- template<Color Us>
- Score king_safety(const Position& pos, Square ksq) {
-
- return kingSquares[Us] == ksq && castleRights[Us] == pos.can_castle(Us)
- ? kingSafety[Us] : update_safety<Us>(pos, ksq);
- }
-
- template<Color Us>
- Score update_safety(const Position& pos, Square ksq);
-
- template<Color Us>
- Value shelter_storm(const Position& pos, Square ksq);
-
- Key key;
- Bitboard passedPawns[COLOR_NB];
- Bitboard pawnAttacks[COLOR_NB];
- Square kingSquares[COLOR_NB];
- int minKPdistance[COLOR_NB];
- int castleRights[COLOR_NB];
- Score value;
- int halfOpenFiles[COLOR_NB];
- Score kingSafety[COLOR_NB];
- int pawnsOnSquares[COLOR_NB][COLOR_NB];
-};
-
-typedef HashTable<Entry, 16384> Table;
-
-Entry* probe(const Position& pos, Table& entries);
-
-}
-
-#endif // !defined(PAWNS_H_INCLUDED)