/*
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
+ 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
// Evaluation functions
- KK, // K vs K
- KBK, // KB vs K
- KNK, // KN vs K
KNNK, // KNN vs K
KXK, // Generic "mate lone king" eval
KBNK, // KBN vs K
KRKN, // KR vs KN
KQKP, // KQ vs KP
KQKR, // KQ vs KR
- KBBKN, // KBB vs KN
- KmmKm, // K and two minors vs K and one or two minors
// Scaling functions
- SCALE_FUNS,
+ SCALING_FUNCTIONS,
- KBPsK, // KB+pawns vs K
- KQKRPs, // KQ vs KR+pawns
+ 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, // King and pawns vs king
+ KPsK, // K and pawns vs K
KBPKB, // KBP vs KB
KBPPKB, // KBPP vs KB
KBPKN, // KBP vs KN
};
-/// Endgame functions can be of two types according if return a Value or a
-/// ScaleFactor. Type eg_fun<int>::type equals to either ScaleFactor or Value
-/// depending if the template parameter is 0 or 1.
+/// Endgame functions can be of two types depending on whether they return a
+/// Value or a ScaleFactor. Type eg_fun<int>::type returns either ScaleFactor
+/// or Value depending on whether the template parameter is 0 or 1.
template<int> struct eg_fun { typedef Value type; };
template<> struct eg_fun<1> { typedef ScaleFactor type; };
struct EndgameBase {
virtual ~EndgameBase() {}
- virtual Color color() const = 0;
+ virtual Color strong_side() const = 0;
virtual T operator()(const Position&) const = 0;
};
-template<EndgameType E, typename T = typename eg_fun<(E > SCALE_FUNS)>::type>
+template<EndgameType E, typename T = typename eg_fun<(E > SCALING_FUNCTIONS)>::type>
struct Endgame : public EndgameBase<T> {
- explicit Endgame(Color c) : strongerSide(c), weakerSide(~c) {}
- Color color() const { return strongerSide; }
+ explicit Endgame(Color c) : strongSide(c), weakSide(~c) {}
+ Color strong_side() const { return strongSide; }
T operator()(const Position&) const;
private:
- Color strongerSide, weakerSide;
+ const Color strongSide, weakSide;
};
-/// Endgames class stores in two std::map the pointers to endgame evaluation
-/// and scaling base objects. Then we use polymorphism to invoke the actual
-/// endgame function calling its operator() that is virtual.
+/// 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 {
Endgames();
~Endgames();
- template<typename T> T probe(Key key, T& eg)
- { return eg = map(eg).count(key) ? map(eg)[key] : NULL; }
+ template<typename T> T probe(Key key, T& eg) {
+ return eg = map(eg).count(key) ? map(eg)[key] : NULL;
+ }
};
#endif // #ifndef ENDGAME_H_INCLUDED