-/*
- Stockfish, a UCI chess playing engine derived from Glaurung 2.1
- Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2014 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/>.
-*/
-
-#include <cassert>
-#include <sstream>
-
-#include "movegen.h"
-#include "position.h"
-#include "uci.h"
-
-using namespace std;
-
-static const char* PieceToChar[COLOR_NB] = { " PNBRQK", " pnbrqk" };
-
-
-/// score_to_uci() converts a Value to a string suitable for use with the UCI
-/// protocol specifications:
-///
-/// cp <x> The score from the engine's point of view in centipawns.
-/// mate <y> Mate in y moves, not plies. If the engine is getting mated
-/// use negative values for y.
-
-string UCI::format_value(Value v, Value alpha, Value beta) {
-
- stringstream ss;
-
- if (abs(v) < VALUE_MATE_IN_MAX_PLY)
- ss << "cp " << v * 100 / PawnValueEg;
- else
- ss << "mate " << (v > 0 ? VALUE_MATE - v + 1 : -VALUE_MATE - v) / 2;
-
- ss << (v >= beta ? " lowerbound" : v <= alpha ? " upperbound" : "");
-
- return ss.str();
-}
-
-
-/// format_square() converts a Square to a string (g1, a7, etc.)
-
-std::string UCI::format_square(Square s) {
- char ch[] = { 'a' + file_of(s), '1' + rank_of(s), 0 };
- return ch;
-}
-
-
-/// format_move() converts a Move to a string in coordinate notation
-/// (g1f3, a7a8q, etc.). The only special case is castling moves, where we print
-/// in the e1g1 notation in normal chess mode, and in e1h1 notation in chess960
-/// mode. Internally castling moves are always encoded as "king captures rook".
-
-string UCI::format_move(Move m, bool chess960) {
-
- Square from = from_sq(m);
- Square to = to_sq(m);
-
- if (m == MOVE_NONE)
- return "(none)";
-
- if (m == MOVE_NULL)
- return "0000";
-
- if (type_of(m) == CASTLING && !chess960)
- to = make_square(to > from ? FILE_G : FILE_C, rank_of(from));
-
- string move = format_square(from) + format_square(to);
-
- if (type_of(m) == PROMOTION)
- move += PieceToChar[BLACK][promotion_type(m)]; // Lower case
-
- return move;
-}
-
-
-/// to_move() takes a position and a string representing a move in
-/// simple coordinate notation and returns an equivalent legal Move if any.
-
-Move UCI::to_move(const Position& pos, string& str) {
-
- if (str.length() == 5) // Junior could send promotion piece in uppercase
- str[4] = char(tolower(str[4]));
-
- for (MoveList<LEGAL> it(pos); *it; ++it)
- if (str == format_move(*it, pos.is_chess960()))
- return *it;
-
- return MOVE_NONE;
-}