Greatly speedup has_mate_threat()

[stockfish] / src / book.h

diff --git a/src/book.h b/src/book.h
index ee3f5c5a7a3a3a7b7c87a6ddc6de8088c69963f3..b6cee8080ca02205ace5be669059e5e9740b447d 100644 (file)
--- a/src/book.h
+++ b/src/book.h
@@ -1,17 +1,18 @@
 /*
-  Glaurung, a UCI chess playing engine.
-  Copyright (C) 2004-2008 Tord Romstad
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+  Copyright (C) 2008 Marco Costalba
 
-  Glaurung is free software: you can redistribute it and/or modify
+  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.
-  
-  Glaurung is distributed in the hope that it will be useful,
+
+  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/>.
 */
@@ -32,6 +33,7 @@
 //// Includes
 ////
 
+#include <fstream>
 #include <string>
 
 #include "move.h"
@@ -74,7 +76,7 @@ private:
   void read_entry(BookEntry &entry, int n) const;
 
   std::string fileName;
-  FILE *bookFile;
+  mutable std::ifstream bookFile;
   int bookSize;
 };