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Better naming and document some endgame functions
[stockfish]
/
src
/
material.h
diff --git
a/src/material.h
b/src/material.h
index 59f7f3e26001c2d05832118cddc2e0fef5fe5fb4..8f9f375116e77c92fcfb06311e3f5d1c0fe5f0b3 100644
(file)
--- a/
src/material.h
+++ b/
src/material.h
@@
-1,18
+1,18
@@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008 Marco Costalba
+ Copyright (C) 2008
-2009
Marco Costalba
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 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.
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/>.
*/
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
@@
-35,7
+35,7
@@
////
/// MaterialInfo is a class which contains various information about a
////
/// MaterialInfo is a class which contains various information about a
-/// material configuration.
It contains a material balance evaluation,
+/// material configuration. It contains a material balance evaluation,
/// a function pointer to a special endgame evaluation function (which in
/// most cases is NULL, meaning that the standard evaluation function will
/// be used), and "scale factors" for black and white.
/// a function pointer to a special endgame evaluation function (which in
/// most cases is NULL, meaning that the standard evaluation function will
/// be used), and "scale factors" for black and white.
@@
-49,42
+49,42
@@
class MaterialInfo {
friend class MaterialInfoTable;
public:
friend class MaterialInfoTable;
public:
- Value mg_value() const;
- Value eg_value() const;
- ScaleFactor scale_factor(const Position &pos, Color c) const;
- bool specialized_eval_exists() const;
- Value evaluate(const Position &pos) const;
+ MaterialInfo() : key(0) { clear(); }
- static void init();
+ Value material_value() const;
+ ScaleFactor scale_factor(const Position& pos, Color c) const;
+ int space_weight() const;
+ bool specialized_eval_exists() const;
+ Value evaluate(const Position& pos) const;
private:
private:
- void clear();
-
+
inline
void clear();
+
Key key;
Key key;
- int16_t mgValue;
- int16_t egValue;
+ int16_t value;
uint8_t factor[2];
uint8_t factor[2];
- EndgameEvaluationFunction *evaluationFunction;
- ScalingFunction *scalingFunction[2];
+ EndgameEvaluationFunctionBase* evaluationFunction;
+ EndgameScalingFunctionBase* scalingFunction[2];
+ int spaceWeight;
};
};
-
-/// The MaterialInfoTable class represents a pawn hash table. It is basically
+/// The MaterialInfoTable class represents a pawn hash table. It is basically
/// just an array of MaterialInfo objects and a few methods for accessing these
/// just an array of MaterialInfo objects and a few methods for accessing these
-/// objects.
The most important method is get_material_info, which looks up a
+/// objects. The most important method is get_material_info, which looks up a
/// position in the table and returns a pointer to a MaterialInfo object.
/// position in the table and returns a pointer to a MaterialInfo object.
+class EndgameFunctions;
class MaterialInfoTable {
public:
MaterialInfoTable(unsigned numOfEntries);
~MaterialInfoTable();
class MaterialInfoTable {
public:
MaterialInfoTable(unsigned numOfEntries);
~MaterialInfoTable();
- void clear();
- MaterialInfo *get_material_info(const Position &pos);
+ MaterialInfo* get_material_info(const Position& pos);
private:
unsigned size;
private:
unsigned size;
- MaterialInfo *entries;
+ MaterialInfo* entries;
+ EndgameFunctions* funcs;
};
};
@@
-92,61
+92,72
@@
private:
//// Inline functions
////
//// Inline functions
////
-/// MaterialInfo::m
g_value and MaterialInfo::eg_value simply returns th
e
-///
material balance evaluation for the middle game and the endgam
e.
+/// MaterialInfo::m
aterial_value simply returns the material balanc
e
+///
evaluation that is independent from game phas
e.
-inline Value MaterialInfo::mg_value() const {
- return Value(mgValue);
-}
+inline Value MaterialInfo::material_value() const {
-inline Value MaterialInfo::eg_value() const {
- return Value(egValue);
+ return Value(value);
}
/// MaterialInfo::clear() resets a MaterialInfo object to an empty state,
}
/// MaterialInfo::clear() resets a MaterialInfo object to an empty state,
-/// with all slots at their default values.
+/// with all slots at their default values
but the key
.
inline void MaterialInfo::clear() {
inline void MaterialInfo::clear() {
- mgValue = egValue = 0;
+
+ value = 0;
factor[WHITE] = factor[BLACK] = uint8_t(SCALE_FACTOR_NORMAL);
evaluationFunction = NULL;
scalingFunction[WHITE] = scalingFunction[BLACK] = NULL;
factor[WHITE] = factor[BLACK] = uint8_t(SCALE_FACTOR_NORMAL);
evaluationFunction = NULL;
scalingFunction[WHITE] = scalingFunction[BLACK] = NULL;
+ spaceWeight = 0;
}
/// MaterialInfo::scale_factor takes a position and a color as input, and
}
/// MaterialInfo::scale_factor takes a position and a color as input, and
-/// returns a scale factor for the given color.
We have to provide the
+/// returns a scale factor for the given color. We have to provide the
/// position in addition to the color, because the scale factor need not
/// position in addition to the color, because the scale factor need not
-///
be a constant:
It can also be a function which should be applied to
-/// the position.
For instance, in KBP vs K endgames, a scaling function
+///
to be a constant:
It can also be a function which should be applied to
+/// the position. For instance, in KBP vs K endgames, a scaling function
/// which checks for draws with rook pawns and wrong-colored bishops.
/// which checks for draws with rook pawns and wrong-colored bishops.
-inline ScaleFactor MaterialInfo::scale_factor(const Position &pos, Color c)
- const {
- if(scalingFunction[c] != NULL) {
- ScaleFactor sf = scalingFunction[c]->apply(pos);
- if(sf != SCALE_FACTOR_NONE)
- return sf;
+inline ScaleFactor MaterialInfo::scale_factor(const Position& pos, Color c) const {
+
+ if (scalingFunction[c] != NULL)
+ {
+ ScaleFactor sf = scalingFunction[c]->apply(pos);
+ if (sf != SCALE_FACTOR_NONE)
+ return sf;
}
return ScaleFactor(factor[c]);
}
}
return ScaleFactor(factor[c]);
}
+/// MaterialInfo::space_weight() simply returns the weight for the space
+/// evaluation for this material configuration.
+
+inline int MaterialInfo::space_weight() const {
+
+ return spaceWeight;
+}
+
+
/// MaterialInfo::specialized_eval_exists decides whether there is a
/// specialized evaluation function for the current material configuration,
/// or if the normal evaluation function should be used.
inline bool MaterialInfo::specialized_eval_exists() const {
/// MaterialInfo::specialized_eval_exists decides whether there is a
/// specialized evaluation function for the current material configuration,
/// or if the normal evaluation function should be used.
inline bool MaterialInfo::specialized_eval_exists() const {
+
return evaluationFunction != NULL;
}
return evaluationFunction != NULL;
}
-/// MaterialInfo::evaluate applies a specialized evaluation function to a
-/// given position object. It should only be called when
-/// this->specialized_eval_exists() returns 'true'.
+/// MaterialInfo::evaluate applies a specialized evaluation function
+/// to a given position object. It should only be called when
+/// specialized_eval_exists() returns 'true'.
+
+inline Value MaterialInfo::evaluate(const Position& pos) const {
-inline Value MaterialInfo::evaluate(const Position &pos) const {
return evaluationFunction->apply(pos);
}
return evaluationFunction->apply(pos);
}