2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #if !defined(BOOK_H_INCLUDED)
21 #define BOOK_H_INCLUDED
31 // A Polyglot book is a series of "entries" of 16 bytes. All integers are
32 // stored highest byte first (regardless of size). The entries are ordered
33 // according to key. Lowest key first.
41 class Book : private std::ifstream {
42 Book(const Book&); // just decleared..
43 Book& operator=(const Book&); // ..to avoid a warning
47 void open(const std::string& fileName);
49 Move get_move(const Position& pos, bool findBestMove);
50 const std::string name() const { return bookName; }
53 // read n chars from the file stream and converts them in an
54 // integer number. Integers are stored with highest byte first.
55 template<int n> uint64_t get_int();
58 Book& operator>>(T& n) { n = (T)get_int<sizeof(T)>(); return *this; }
60 BookEntry read_entry(int idx);
61 int find_entry(uint64_t key);
68 // Yes, we indulge a bit here ;-)
69 template<int n> inline uint64_t Book::get_int() { return 256 * get_int<n-1>() + get(); }
70 template<> inline uint64_t Book::get_int<1>() { return get(); }
73 #endif // !defined(BOOK_H_INCLUDED)