X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmaterial.h;h=e33fc87bdf8c2ae8f590b64aba27b133c7ac7271;hp=72d449131439e1ed05cec5bea24056549b1374a0;hb=98352a5e84096c906d5ecc1aeb2fca8745e173c2;hpb=ef6fca98a0b70b82ba701e6969a80cd9daf78705

diff --git a/src/material.h b/src/material.h
index 72d44913..e33fc87b 100644
--- a/src/material.h
+++ b/src/material.h
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2010 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
@@ -17,22 +17,22 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
 #if !defined(MATERIAL_H_INCLUDED)
 #define MATERIAL_H_INCLUDED
 
-////
-//// Includes
-////
-
 #include "endgame.h"
 #include "position.h"
-#include "scale.h"
+#include "tt.h"
+#include "types.h"
 
+const int MaterialTableSize = 8192;
+
+/// Game phase
+enum Phase {
+  PHASE_ENDGAME = 0,
+  PHASE_MIDGAME = 128
+};
 
-////
-//// Types
-////
 
 /// MaterialInfo is a class which contains various information about a
 /// material configuration. It contains a material balance evaluation,
@@ -49,69 +49,40 @@ class MaterialInfo {
   friend class MaterialInfoTable;
 
 public:
-  MaterialInfo() : key(0) { clear(); }
-
   Score material_value() const;
   ScaleFactor scale_factor(const Position& pos, Color c) const;
   int space_weight() const;
+  Phase game_phase() const;
   bool specialized_eval_exists() const;
   Value evaluate(const Position& pos) const;
 
 private:
-  inline void clear();
-
   Key key;
   int16_t value;
   uint8_t factor[2];
-  EndgameEvaluationFunctionBase* evaluationFunction;
-  EndgameScalingFunctionBase* scalingFunction[2];
+  EndgameBase<Value>* evaluationFunction;
+  EndgameBase<ScaleFactor>* scalingFunction[2];
   int spaceWeight;
+  Phase gamePhase;
 };
 
-/// The MaterialInfoTable class represents a pawn hash table. It is basically
-/// 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
-/// position in the table and returns a pointer to a MaterialInfo object.
-class EndgameFunctions;
 
-class MaterialInfoTable {
+/// The MaterialInfoTable class represents a pawn hash table. The most important
+/// method is get_material_info, which returns a pointer to a MaterialInfo object.
 
+class MaterialInfoTable : public SimpleHash<MaterialInfo, MaterialTableSize> {
 public:
-  MaterialInfoTable(unsigned numOfEntries);
   ~MaterialInfoTable();
-  MaterialInfo* get_material_info(const Position& pos);
+  void init();
+  MaterialInfo* get_material_info(const Position& pos) const;
+  static Phase game_phase(const Position& pos);
 
 private:
-  unsigned size;
-  MaterialInfo* entries;
-  EndgameFunctions* funcs;
-};
-
-
-////
-//// Inline functions
-////
-
-/// MaterialInfo::material_value simply returns the material balance
-/// evaluation that is independent from game phase.
-
-inline Score MaterialInfo::material_value() const {
-
-  return make_score(value, value);
-}
-
-
-/// MaterialInfo::clear() resets a MaterialInfo object to an empty state,
-/// with all slots at their default values but the key.
-
-inline void MaterialInfo::clear() {
+  template<Color Us>
+  static int imbalance(const int pieceCount[][8]);
 
-  value = 0;
-  factor[WHITE] = factor[BLACK] = uint8_t(SCALE_FACTOR_NORMAL);
-  evaluationFunction = NULL;
-  scalingFunction[WHITE] = scalingFunction[BLACK] = NULL;
-  spaceWeight = 0;
-}
+  Endgames* funcs;
+};
 
 
 /// MaterialInfo::scale_factor takes a position and a color as input, and
@@ -123,42 +94,31 @@ inline void MaterialInfo::clear() {
 
 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]);
+  if (!scalingFunction[c])
+      return ScaleFactor(factor[c]);
+
+  ScaleFactor sf = (*scalingFunction[c])(pos);
+  return sf == SCALE_FACTOR_NONE ? ScaleFactor(factor[c]) : sf;
 }
 
+inline Value MaterialInfo::evaluate(const Position& pos) const {
+  return (*evaluationFunction)(pos);
+}
 
-/// MaterialInfo::space_weight() simply returns the weight for the space
-/// evaluation for this material configuration.
+inline Score MaterialInfo::material_value() const {
+  return make_score(value, value);
+}
 
 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 Phase MaterialInfo::game_phase() const {
+  return gamePhase;
+}
 
 inline bool MaterialInfo::specialized_eval_exists() const {
-
   return evaluationFunction != NULL;
 }
 
-
-/// 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 {
-
-  return evaluationFunction->apply(pos);
-}
-
 #endif // !defined(MATERIAL_H_INCLUDED)