X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fpawns.h;h=e1583fc04928f14a34895188133fcf0e3e3d6824;hp=ba337a8d64a3726fbf91273e30800093d548839c;hb=55df3fa2d7631ed67e46f9433aa7f3a71c18e5e7;hpb=5c81602d14539f8259a715477315e28b5de7cb54

diff --git a/src/pawns.h b/src/pawns.h
index ba337a8d..e1583fc0 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) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2012 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
@@ -17,117 +17,99 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
 #if !defined(PAWNS_H_INCLUDED)
 #define PAWNS_H_INCLUDED
 
-////
-//// Includes
-////
-
-#include "bitboard.h"
-#include "value.h"
+#include "misc.h"
+#include "position.h"
+#include "types.h"
 
-////
-//// Types
-////
+const int PawnTableSize = 16384;
 
-/// 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
-/// (performed by calling the get_pawn_info method in a PawnInfoTable object)
-/// returns a pointer to a PawnInfo object.
-class Position;
+/// PawnEntry 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 (performed by calling the probe method in a PawnTable object)
+/// returns a pointer to a PawnEntry object.
 
-class PawnInfo {
+class PawnEntry {
 
-  friend class PawnInfoTable;
+  friend struct PawnTable;
 
 public:
-  Value mg_value() const;
-  Value eg_value() const;
-  Value kingside_storm_value(Color c) const;
-  Value queenside_storm_value(Color c) const;
-  Bitboard passed_pawns() const;
+  Score pawns_value() const;
+  Bitboard pawn_attacks(Color c) const;
+  Bitboard passed_pawns(Color c) 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;
 
+  template<Color Us>
+  Score king_safety(const Position& pos, Square ksq);
+
 private:
-  void clear();
+  template<Color Us>
+  Score update_safety(const Position& pos, Square ksq);
+
+  template<Color Us>
+  Value shelter_storm(const Position& pos, Square ksq);
 
   Key key;
-  Bitboard passedPawns;
-  int16_t mgValue, egValue;
-  int16_t ksStormValue[2], qsStormValue[2];
-  uint8_t halfOpenFiles[2];
+  Bitboard passedPawns[COLOR_NB];
+  Bitboard pawnAttacks[COLOR_NB];
+  Square kingSquares[COLOR_NB];
+  int minKPdistance[COLOR_NB];
+  int castleRights[COLOR_NB];
+  Score value;
+  int halfOpenFiles[COLOR_NB];
+  Score kingSafety[COLOR_NB];
 };
 
 
-/// 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 {
-
-public:
-  PawnInfoTable(unsigned numOfEntries);
-  ~PawnInfoTable();
-  void clear();
-  PawnInfo* get_pawn_info(const Position& pos);
+/// The PawnTable class represents a pawn hash table. The most important
+/// method is probe, which returns a pointer to a PawnEntry object.
 
-private:
-  unsigned size;
-  PawnInfo* entries;
-};
+struct PawnTable {
 
+  PawnEntry* probe(const Position& pos);
 
-////
-//// Inline functions
-////
+  template<Color Us>
+  static Score evaluate_pawns(const Position& pos, Bitboard ourPawns,
+                              Bitboard theirPawns, PawnEntry* e);
 
-inline Value PawnInfo::mg_value() const {
-  return Value(mgValue);
-}
+  HashTable<PawnEntry, PawnTableSize> entries;
+};
 
-inline Value PawnInfo::eg_value() const {
-  return Value(egValue);
-}
 
-inline Bitboard PawnInfo::passed_pawns() const {
-  return passedPawns;
+inline Score PawnEntry::pawns_value() const {
+  return value;
 }
 
-inline Value PawnInfo::kingside_storm_value(Color c) const {
-  return Value(ksStormValue[c]);
+inline Bitboard PawnEntry::pawn_attacks(Color c) const {
+  return pawnAttacks[c];
 }
 
-inline Value PawnInfo::queenside_storm_value(Color c) const {
-  return Value(qsStormValue[c]);
+inline Bitboard PawnEntry::passed_pawns(Color c) const {
+  return passedPawns[c];
 }
 
-inline int PawnInfo::file_is_half_open(Color c, File f) const {
-  return (halfOpenFiles[c] & (1 << int(f)));
+inline int PawnEntry::file_is_half_open(Color c, File f) const {
+  return halfOpenFiles[c] & (1 << int(f));
 }
 
-inline int PawnInfo::has_open_file_to_left(Color c, File f) const {
+inline int PawnEntry::has_open_file_to_left(Color c, File f) const {
   return halfOpenFiles[c] & ((1 << int(f)) - 1);
 }
 
-inline int PawnInfo::has_open_file_to_right(Color c, File f) const {
+inline int PawnEntry::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;
+template<Color Us>
+inline Score PawnEntry::king_safety(const Position& pos, Square ksq) {
+  return kingSquares[Us] == ksq && castleRights[Us] == pos.can_castle(Us)
+       ? kingSafety[Us] : update_safety<Us>(pos, ksq);
 }
 
-
 #endif // !defined(PAWNS_H_INCLUDED)