Remove depth dependence in value_draw().

[stockfish] / src / endgame.h

diff --git a/src/endgame.h b/src/endgame.h
index 81afb2e55478ccbd62764c009d43f3cbf7cdc22f..e29f877782cd6c67501d751394cbc3f599c5dd7b 100644 (file)
--- a/src/endgame.h
+++ b/src/endgame.h
@@ -21,7 +21,7 @@
 #ifndef ENDGAME_H_INCLUDED
 #define ENDGAME_H_INCLUDED
 
-#include <map>
+#include <unordered_map>
 #include <memory>
 #include <string>
 #include <type_traits>
@@ -91,17 +91,19 @@ struct Endgame : public EndgameBase<T> {
 };
 
 
-/// The Endgames class stores the pointers to endgame evaluation and scaling
+/// The Endgames namespace handles 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().
 
 namespace Endgames {
 
   template<typename T> using Ptr = std::unique_ptr<EndgameBase<T>>;
-  template<typename T> using Map = std::map<Key, Ptr<T>>;
-  
+  template<typename T> using Map = std::unordered_map<Key, Ptr<T>>;
+
   extern std::pair<Map<Value>, Map<ScaleFactor>> maps;
 
+  void init();
+
   template<typename T>
   Map<T>& map() {
     return std::get<std::is_same<T, ScaleFactor>::value>(maps);
@@ -117,10 +119,9 @@ namespace Endgames {
 
   template<typename T>
   const EndgameBase<T>* probe(Key key) {
-    return map<T>().count(key) ? map<T>()[key].get() : nullptr;
+    auto it = map<T>().find(key);
+    return it != map<T>().end() ? it->second.get() : nullptr;
   }
-
-  void init();
 }
 
 #endif // #ifndef ENDGAME_H_INCLUDED