X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.h;h=557580e11ca3f41ee674ab8a58ee1362249fe39f;hp=bd6b54abb3ddfc75f3d2e87c2247aeb9648d74c3;hb=4626ec2890b140829e9971658ca948005b945fd4;hpb=74160ac60266f9e6824a5a6417d8a0ac8c0b39cf

diff --git a/src/pawns.h b/src/pawns.h
index bd6b54ab..557580e1 100644
--- a/src/pawns.h
+++ b/src/pawns.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 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
@@ -33,9 +33,9 @@
 ////
 
 /// PawnInfo is a class which contains various information about a pawn
-/// structure.  Currently, it only includes a middle game and an end game
-/// pawn structure evaluation, and a bitboard of passed pawns.  We may want
-/// to add further information in the future.  A lookup to the pawn hash table
+/// structure. Currently, it only includes a middle game and an end game
+/// pawn structure evaluation, and a bitboard of passed pawns. We may want
+/// to add further information in the future. A lookup to the pawn hash table
 /// (performed by calling the get_pawn_info method in a PawnInfoTable object)
 /// returns a pointer to a PawnInfo object.
 class Position;
@@ -45,26 +45,32 @@ class PawnInfo {
   friend class PawnInfoTable;
 
 public:
-  Value mg_value() const;
-  Value eg_value() const;
+  PawnInfo() { clear(); }
+
+  Score value() const;
   Value kingside_storm_value(Color c) const;
   Value queenside_storm_value(Color c) const;
+  Bitboard pawn_attacks(Color c) const;
   Bitboard passed_pawns() const;
   int file_is_half_open(Color c, File f) const;
   int has_open_file_to_left(Color c, File f) const;
   int has_open_file_to_right(Color c, File f) const;
+  int get_king_shelter(const Position& pos, Color c, Square ksq);
 
 private:
   void clear();
+  int updateShelter(const Position& pos, Color c, Square ksq);
 
   Key key;
   Bitboard passedPawns;
+  Bitboard pawnAttacks[2];
   int16_t mgValue, egValue;
   int16_t ksStormValue[2], qsStormValue[2];
   uint8_t halfOpenFiles[2];
+  Square kingSquares[2];
+  uint8_t 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
@@ -75,10 +81,14 @@ class PawnInfoTable {
 public:
   PawnInfoTable(unsigned numOfEntries);
   ~PawnInfoTable();
-  void clear();
   PawnInfo* get_pawn_info(const Position& pos);
 
 private:
+  typedef std::pair<Value, Value> Values;
+
+  template<Color Us>
+  Values evaluate_pawns(const Position& pos, Bitboard ourPawns, Bitboard theirPawns, PawnInfo* pi);
+
   unsigned size;
   PawnInfo* entries;
 };
@@ -88,18 +98,18 @@ private:
 //// Inline functions
 ////
 
-inline Value PawnInfo::mg_value() const {
-  return Value(mgValue);
-}
-
-inline Value PawnInfo::eg_value() const {
-  return Value(egValue);
+inline Score PawnInfo::value() const {
+  return Score(mgValue, egValue);
 }
 
 inline Bitboard PawnInfo::passed_pawns() const {
   return passedPawns;
 }
 
+inline Bitboard PawnInfo::pawn_attacks(Color c) const {
+  return pawnAttacks[c];
+}
+
 inline Value PawnInfo::kingside_storm_value(Color c) const {
   return Value(ksStormValue[c]);
 }
@@ -120,14 +130,8 @@ inline int PawnInfo::has_open_file_to_right(Color c, File f) const {
   return halfOpenFiles[c] & ~((1 << int(f+1)) - 1);
 }
 
-inline void PawnInfo::clear() {
-
-  passedPawns = EmptyBoardBB;
-  mgValue = egValue = 0;
-  ksStormValue[WHITE] = ksStormValue[BLACK] = 0;
-  qsStormValue[WHITE] = qsStormValue[BLACK] = 0;
-  halfOpenFiles[WHITE] = halfOpenFiles[BLACK] = 0xFF;
+inline int PawnInfo::get_king_shelter(const Position& pos, Color c, Square ksq) {
+  return (kingSquares[c] == ksq ? kingShelters[c] : updateShelter(pos, c, ksq));
 }
 
-
 #endif // !defined(PAWNS_H_INCLUDED)