+++ /dev/null
-/*
- 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
-
- 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/>.
-*/
-
-#ifndef ENDGAME_H_INCLUDED
-#define ENDGAME_H_INCLUDED
-
-#include <map>
-#include <memory>
-#include <string>
-#include <type_traits>
-#include <utility>
-
-#include "position.h"
-#include "types.h"
-
-
-/// EndgameType lists all supported endgames
-
-enum EndgameType {
-
- // Evaluation functions
-
- KNNK, // KNN vs K
- KXK, // Generic "mate lone king" eval
- KBNK, // KBN vs K
- KPK, // KP vs K
- KRKP, // KR vs KP
- KRKB, // KR vs KB
- KRKN, // KR vs KN
- KQKP, // KQ vs KP
- KQKR, // KQ vs KR
-
-
- // Scaling functions
- SCALING_FUNCTIONS,
-
- KBPsK, // KB and pawns vs K
- KQKRPs, // KQ vs KR and pawns
- KRPKR, // KRP vs KR
- KRPKB, // KRP vs KB
- KRPPKRP, // KRPP vs KRP
- KPsK, // K and pawns vs K
- KBPKB, // KBP vs KB
- KBPPKB, // KBPP vs KB
- KBPKN, // KBP vs KN
- KNPK, // KNP vs K
- KNPKB, // KNP vs KB
- KPKP // KP vs KP
-};
-
-
-/// Endgame functions can be of two types depending on whether they return a
-/// Value or a ScaleFactor.
-template<EndgameType E>
-using eg_fun = std::conditional<(E < SCALING_FUNCTIONS), Value, ScaleFactor>;
-
-
-/// Base and derived templates for endgame evaluation and scaling functions
-
-template<typename T>
-struct EndgameBase {
-
- virtual ~EndgameBase() {}
- virtual Color strong_side() const = 0;
- virtual T operator()(const Position&) const = 0;
-};
-
-
-template<EndgameType E, typename T = typename eg_fun<E>::type>
-struct Endgame : public EndgameBase<T> {
-
- explicit Endgame(Color c) : strongSide(c), weakSide(~c) {}
- Color strong_side() const { return strongSide; }
- T operator()(const Position&) const;
-
-private:
- Color strongSide, weakSide;
-};
-
-
-/// The Endgames class stores the pointers to endgame evaluation and scaling
-/// base objects in two std::map. We use polymorphism to invoke the actual
-/// endgame function by calling its virtual operator().
-
-class Endgames {
-
- template<typename T> using Map = std::map<Key, std::unique_ptr<T>>;
-
- template<EndgameType E, typename T = EndgameBase<typename eg_fun<E>::type>>
- void add(const std::string& code);
-
- template<typename T, int I = std::is_same<T, EndgameBase<ScaleFactor>>::value>
- Map<T>& map() { return std::get<I>(maps); }
-
- std::pair<Map<EndgameBase<Value>>, Map<EndgameBase<ScaleFactor>>> maps;
-
-public:
- Endgames();
-
- template<typename T, typename E = EndgameBase<T>> E* probe(Key key)
- { return map<E>().count(key) ? map<E>()[key].get() : nullptr; }
-};
-
-#endif // #ifndef ENDGAME_H_INCLUDED