X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fpawns.h;h=0376ce617f098e7c151dd45cf6816640936f11d8;hb=0049d3f337b6f3a66a0;hp=528bc873fd98b443f562434955c5600e40d2bd01;hpb=9fc602bae74b8e09bd45ace3b42a8ce84d56b23c;p=stockfish
diff --git a/src/pawns.h b/src/pawns.h
index 528bc873..0376ce61 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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ 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
@@ -17,119 +17,96 @@
along with this program. If not, see .
*/
-
#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
+/// 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 get_pawn_info method in a PawnInfoTable object)
-/// returns a pointer to a PawnInfo object.
-class Position;
+/// 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:
- PawnInfo() { clear(); }
-
Score pawns_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;
+ 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;
- int get_king_shelter(const Position& pos, Color c, Square ksq);
+
+ template
+ Score king_safety(const Position& pos, Square ksq);
private:
- void clear();
- int updateShelter(const Position& pos, Color c, Square ksq);
+ template
+ Score update_safety(const Position& pos, Square ksq);
+
+ template
+ Value shelter_storm(const Position& pos, Square ksq);
Key key;
- Bitboard passedPawns;
+ Bitboard passedPawns[2];
Bitboard pawnAttacks[2];
- Score value;
- int16_t ksStormValue[2], qsStormValue[2];
- uint8_t halfOpenFiles[2];
Square kingSquares[2];
- uint8_t kingShelters[2];
+ Score value;
+ int halfOpenFiles[2];
+ Score kingSafety[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 PawnTable class represents a pawn hash table. The most important
+/// method is probe, which returns a pointer to a PawnEntry object.
-public:
- PawnInfoTable(unsigned numOfEntries);
- ~PawnInfoTable();
- PawnInfo* get_pawn_info(const Position& pos);
+struct PawnTable {
+
+ PawnEntry* probe(const Position& pos);
-private:
template
- Score evaluate_pawns(const Position& pos, Bitboard ourPawns, Bitboard theirPawns, PawnInfo* pi);
+ static Score evaluate_pawns(const Position& pos, Bitboard ourPawns,
+ Bitboard theirPawns, PawnEntry* e);
- unsigned size;
- PawnInfo* entries;
+ HashTable entries;
};
-////
-//// Inline functions
-////
-
-inline Score PawnInfo::pawns_value() const {
+inline Score PawnEntry::pawns_value() const {
return value;
}
-inline Bitboard PawnInfo::passed_pawns() const {
- return passedPawns;
-}
-
-inline Bitboard PawnInfo::pawn_attacks(Color c) const {
+inline Bitboard PawnEntry::pawn_attacks(Color c) const {
return pawnAttacks[c];
}
-inline Value PawnInfo::kingside_storm_value(Color c) const {
- return Value(ksStormValue[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 int PawnInfo::get_king_shelter(const Position& pos, Color c, Square ksq) {
- return (kingSquares[c] == ksq ? kingShelters[c] : updateShelter(pos, c, ksq));
+template
+inline Score PawnEntry::king_safety(const Position& pos, Square ksq) {
+ return kingSquares[Us] == ksq ? kingSafety[Us] : update_safety(pos, ksq);
}
#endif // !defined(PAWNS_H_INCLUDED)