X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fpawns.h;h=77a09f29acae57eeb95273f3c3dcecd8d28139e2;hb=95212222c7444538b84326208e433ac12f15e9fb;hp=0e7ca61d49fbc7de10397608bbe944baf2b1a08f;hpb=fa2478a81f42648aa3382d60280e01adb0c4536f;p=stockfish

diff --git a/src/pawns.h b/src/pawns.h
index 0e7ca61d..77a09f29 100644
--- a/src/pawns.h
+++ b/src/pawns.h
@@ -27,8 +27,10 @@
 
 #include "bitboard.h"
 #include "position.h"
+#include "tt.h"
 #include "value.h"
 
+
 ////
 //// Types
 ////
@@ -69,26 +71,21 @@ private:
   Score kingShelters[2];
 };
 
-/// The PawnInfoTable class represents a pawn hash table.  It is basically
-/// just an array of PawnInfo objects and a few methods for accessing these
-/// objects.  The most important method is get_pawn_info, which looks up a
-/// position in the table and returns a pointer to a PawnInfo object.
 
-class PawnInfoTable {
+/// The PawnInfoTable class represents a pawn hash table. The most important
+/// method is get_pawn_info, which returns a pointer to a PawnInfo object.
+
+class PawnInfoTable : public SimpleHash<PawnInfo, PawnTableSize> {
 
   enum SideType { KingSide, QueenSide };
 
 public:
-  PawnInfoTable();
-  ~PawnInfoTable();
   PawnInfo* get_pawn_info(const Position& pos) const;
   void prefetch(Key key) const;
 
 private:
   template<Color Us>
   Score evaluate_pawns(const Position& pos, Bitboard ourPawns, Bitboard theirPawns, PawnInfo* pi) const;
-
-  PawnInfo* entries;
 };
 
 
@@ -96,6 +93,10 @@ private:
 //// Inline functions
 ////
 
+inline Square pawn_push(Color c) {
+  return c == WHITE ? DELTA_N : DELTA_S;
+}
+
 inline void PawnInfoTable::prefetch(Key key) const {
 
     unsigned index = unsigned(key & (PawnTableSize - 1));