Fix random moves when time < 10ms

[stockfish] / src / book.h

diff --git a/src/book.h b/src/book.h
index 2c17527348e6cc534217735b88e5d77477af9bb1..4ce74f471fddddfdef74b710e6de15153ac89d93 100644 (file)
--- a/src/book.h
+++ b/src/book.h
@@ -1,91 +1,45 @@
 /*
   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) 2008-2013 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
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
-  
+
   Stockfish is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
-  
+
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
-/*
-  The code in this file is based on the opening book code in PolyGlot
-  by Fabien Letouzey.  PolyGlot is available under the GNU General
-  Public License, and can be downloaded from http://wbec-ridderkerk.nl
-*/
-
-
-#if !defined(BOOK_H_INCLUDED)
+#ifndef BOOK_H_INCLUDED
 #define BOOK_H_INCLUDED
 
-
-////
-//// Includes
-////
-
 #include <fstream>
 #include <string>
 
-#include "move.h"
 #include "position.h"
+#include "rkiss.h"
 
-
-////
-//// Types
-////
-
-struct BookEntry {
-  uint64_t key;
-  uint16_t move;
-  uint16_t count;
-  uint16_t n;
-  uint16_t sum;
-};
-
-class Book {
-
+class PolyglotBook : private std::ifstream {
 public:
-  // Constructors
-  Book();
-
-  // Open and close book files
-  void open(const std::string &fName);
-  void close();
-
-  // Testing if a book is opened
-  bool is_open() const;
-
-  // The file name of the currently active book
-  const std::string file_name() const;
-
-  // Get a book move for a given position
-  Move get_move(const Position &pos) const;
+  PolyglotBook();
+ ~PolyglotBook();
+  Move probe(const Position& pos, const std::string& fName, bool pickBest);
 
 private:
-  int find_key(uint64_t key) const;
-  void read_entry(BookEntry &entry, int n) const;
+  template<typename T> PolyglotBook& operator>>(T& n);
 
+  bool open(const char* fName);
+  size_t find_first(Key key);
+
+  RKISS rkiss;
   std::string fileName;
-  mutable std::ifstream bookFile;
-  int bookSize;
 };
 
-
-////
-//// Global variables
-////
-
-extern Book OpeningBook;
-
-
-#endif // !defined(BOOK_H_INCLUDED)
+#endif // #ifndef BOOK_H_INCLUDED