/*
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
#include <fstream>
#include <string>
-#include "move.h"
#include "position.h"
#include "rkiss.h"
-
-// A Polyglot book is a series of "entries" of 16 bytes. All integers are
-// stored highest byte first (regardless of size). The entries are ordered
-// according to key. Lowest key first.
-struct BookEntry {
- uint64_t key;
- uint16_t move;
- uint16_t count;
- uint32_t learn;
-};
-
-class Book {
+class PolyglotBook : private std::ifstream {
public:
- Book();
- ~Book();
- void open(const std::string& fileName);
- void close();
- Move get_move(const Position& pos, bool findBestMove);
- const std::string name() const { return bookName; }
+ PolyglotBook();
+ ~PolyglotBook();
+ Move probe(const Position& pos, const std::string& fName, bool pickBest);
private:
- // read n chars from the file stream and converts them in an
- // integer number. Integers are stored with highest byte first.
- template<int n> uint64_t get_int();
+ template<typename T> PolyglotBook& operator>>(T& n);
- template<typename T>
- Book& operator>>(T& n) { n = (T)get_int<sizeof(T)>(); return *this; }
+ bool open(const char* fName);
+ size_t find_first(Key key);
- BookEntry read_entry(int idx);
- int find_entry(uint64_t key);
-
- std::ifstream bookFile;
- std::string bookName;
- int bookSize;
- RKISS RKiss;
+ RKISS rkiss;
+ std::string fileName;
};
-// Yes, we indulge a bit here ;-)
-template<int n> inline uint64_t Book::get_int() { return 256 * get_int<n-1>() + bookFile.get(); }
-template<> inline uint64_t Book::get_int<1>() { return bookFile.get(); }
-
#endif // !defined(BOOK_H_INCLUDED)