X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=a10920a9714ab381a4a2d4b94fbdf51140b627b8;hp=ae34043831cb19f39fa96fd7c9f677f7d68733a0;hb=94e41274bba2d8a2f2d58aaa711df5872309d66c;hpb=1e7aaed8bc4247a742d515811f0e484ff40309b8 diff --git a/src/uci.cpp b/src/uci.cpp index ae340438..a9811a9a 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -1,7 +1,8 @@ /* 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) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad + Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, 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 @@ -17,356 +18,272 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - -#include -#include #include #include #include #include "evaluate.h" -#include "misc.h" -#include "move.h" #include "movegen.h" #include "position.h" -#include "san.h" #include "search.h" -#include "ucioption.h" +#include "thread.h" +#include "timeman.h" +#include "uci.h" using namespace std; +extern void benchmark(const Position& pos, istream& is); namespace { - // FEN string for the initial position - const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; + // FEN string of the initial position, normal chess + const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - // UCIParser is a class for parsing UCI input. The class - // is actually a string stream built on a given input string. - typedef istringstream UCIParser; + // A list to keep track of the position states along the setup moves (from the + // start position to the position just before the search starts). Needed by + // 'draw by repetition' detection. + StateListPtr States(new std::deque(1)); - // Local functions - void set_option(UCIParser& up); - void set_position(Position& pos, UCIParser& up); - bool go(Position& pos, UCIParser& up); - void perft(Position& pos, UCIParser& up); - Move parse_uci_move(const Position& pos, const std::string &str); -} + // position() is called when engine receives the "position" UCI command. + // The function sets up the position described in the given FEN string ("fen") + // or the starting position ("startpos") and then makes the moves given in the + // following move list ("moves"). -/// execute_uci_command() takes a string as input, uses a UCIParser -/// object to parse this text string as a UCI command, and calls -/// the appropriate functions. In addition to the UCI commands, -/// the function also supports a few debug commands. + void position(Position& pos, istringstream& is) { -bool execute_uci_command(const string& cmd) { + Move m; + string token, fen; - static Position pos(StartPositionFEN, false, 0); // The root position - UCIParser up(cmd); - string token; + is >> token; - if (!(up >> token)) // operator>>() skips any whitespace - return true; - - if (token == "quit") - return false; + if (token == "startpos") + { + fen = StartFEN; + is >> token; // Consume "moves" token if any + } + else if (token == "fen") + while (is >> token && token != "moves") + fen += token + " "; + else + return; - if (token == "go") - return go(pos, up); + States = StateListPtr(new std::deque(1)); + pos.set(fen, Options["UCI_Chess960"], &States->back(), Threads.main()); - if (token == "uci") - { - cout << "id name " << engine_name() - << "\nid author Tord Romstad, Marco Costalba, Joona Kiiski\n"; - print_uci_options(); - cout << "uciok" << endl; + // Parse move list (if any) + while (is >> token && (m = UCI::to_move(pos, token)) != MOVE_NONE) + { + States->push_back(StateInfo()); + pos.do_move(m, States->back(), pos.gives_check(m, CheckInfo(pos))); + } } - else if (token == "ucinewgame") - pos.from_fen(StartPositionFEN, false); - - else if (token == "isready") - cout << "readyok" << endl; - - else if (token == "position") - set_position(pos, up); - else if (token == "setoption") - set_option(up); - // The remaining commands are for debugging purposes only - else if (token == "d") - pos.print(); + // setoption() is called when engine receives the "setoption" UCI command. The + // function updates the UCI option ("name") to the given value ("value"). - else if (token == "flip") - { - Position p(pos, pos.thread()); - pos.flipped_copy(p); - } - else if (token == "eval") - { - Value evalMargin; - cout << "Incremental mg: " << mg_value(pos.value()) - << "\nIncremental eg: " << eg_value(pos.value()) - << "\nFull eval: " << evaluate(pos, evalMargin) << endl; - } - else if (token == "key") - cout << "key: " << hex << pos.get_key() - << "\nmaterial key: " << pos.get_material_key() - << "\npawn key: " << pos.get_pawn_key() << endl; + void setoption(istringstream& is) { - else if (token == "perft") - perft(pos, up); - - else - cout << "Unknown command: " << cmd << endl; - - return true; -} - - -//// -//// Local functions -//// - -namespace { - - // parse_uci_move() takes a position and a string as input, and attempts to - // convert the string to a move, using simple coordinate notation (g1f3, - // a7a8q, etc.). In order to correctly parse en passant captures and castling - // moves, we need the position. This function is not robust, and expects that - // the input move is legal and correctly formatted. - - Move parse_uci_move(const Position& pos, const std::string& str) { - - Square from, to; - Piece piece; - Color us = pos.side_to_move(); - - if (str.length() < 4) - return MOVE_NONE; - - // Read the from and to squares - from = make_square(file_from_char(str[0]), rank_from_char(str[1])); - to = make_square(file_from_char(str[2]), rank_from_char(str[3])); - - // Find the moving piece - piece = pos.piece_on(from); + string token, name, value; - // If the string has more than 4 characters, try to interpret the 5th - // character as a promotion. - if (str.length() > 4 && piece == piece_of_color_and_type(us, PAWN)) - { - switch (tolower(str[4])) { - case 'n': - return make_promotion_move(from, to, KNIGHT); - case 'b': - return make_promotion_move(from, to, BISHOP); - case 'r': - return make_promotion_move(from, to, ROOK); - case 'q': - return make_promotion_move(from, to, QUEEN); - } - } + is >> token; // Consume "name" token - // En passant move? We assume that a pawn move is an en passant move - // if the destination square is epSquare. - if (to == pos.ep_square() && piece == piece_of_color_and_type(us, PAWN)) - return make_ep_move(from, to); + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += string(" ", name.empty() ? 0 : 1) + token; - // Is this a castling move? A king move is assumed to be a castling move - // if the destination square is occupied by a friendly rook, or if the - // distance between the source and destination squares is more than 1. - if (piece == piece_of_color_and_type(us, KING)) - { - if (pos.piece_on(to) == piece_of_color_and_type(us, ROOK)) - return make_castle_move(from, to); - - if (square_distance(from, to) > 1) - { - // This is a castling move, but we have to translate it to the - // internal "king captures rook" representation. - SquareDelta delta = (to > from ? DELTA_E : DELTA_W); - Square s = from; - - do s += delta; - while ( pos.piece_on(s) != piece_of_color_and_type(us, ROOK) - && relative_rank(us, s) == RANK_1); - - return relative_rank(us, s) == RANK_1 ? make_castle_move(from, s) : MOVE_NONE; - } - } + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", value.empty() ? 0 : 1) + token; - return make_move(from, to); + if (Options.count(name)) + Options[name] = value; + else + sync_cout << "No such option: " << name << sync_endl; } - // set_position() is called when Stockfish receives the "position" UCI - // command. The input parameter is a UCIParser. It is assumed - // that this parser has consumed the first token of the UCI command - // ("position"), and is ready to read the second token ("startpos" - // or "fen", if the input is well-formed). - void set_position(Position& pos, UCIParser& up) { + // go() is called when engine receives the "go" UCI command. The function sets + // the thinking time and other parameters from the input string, then starts + // the search. - string token; + void go(const Position& pos, istringstream& is) { - if (!(up >> token) || (token != "startpos" && token != "fen")) - return; - - if (token == "startpos") - { - pos.from_fen(StartPositionFEN, false); - if (!(up >> token)) - return; - } - else // fen - { - string fen; - while (up >> token && token != "moves") - { - fen += token; - fen += ' '; - } - pos.from_fen(fen, Options["UCI_Chess960"].value()); - } - - if (token != "moves") - return; + Search::LimitsType limits; + string token; - // Parse optional move list - Move move; - StateInfo st; - while (up >> token) - { - move = parse_uci_move(pos, token); - pos.do_setup_move(move, st); - } - // Our StateInfo st is about going out of scope so copy - // its content inside pos before it disappears. - pos.detach(); + limits.startTime = now(); // As early as possible! + + while (is >> token) + if (token == "searchmoves") + while (is >> token) + limits.searchmoves.push_back(UCI::to_move(pos, token)); + + else if (token == "wtime") is >> limits.time[WHITE]; + else if (token == "btime") is >> limits.time[BLACK]; + else if (token == "winc") is >> limits.inc[WHITE]; + else if (token == "binc") is >> limits.inc[BLACK]; + else if (token == "movestogo") is >> limits.movestogo; + else if (token == "depth") is >> limits.depth; + else if (token == "nodes") is >> limits.nodes; + else if (token == "movetime") is >> limits.movetime; + else if (token == "mate") is >> limits.mate; + else if (token == "infinite") limits.infinite = 1; + else if (token == "ponder") limits.ponder = 1; + + Threads.start_thinking(pos, States, limits); } +} // namespace + + +/// UCI::loop() waits for a command from stdin, parses it and calls the appropriate +/// function. Also intercepts EOF from stdin to ensure gracefully exiting if the +/// GUI dies unexpectedly. When called with some command line arguments, e.g. to +/// run 'bench', once the command is executed the function returns immediately. +/// In addition to the UCI ones, also some additional debug commands are supported. + +void UCI::loop(int argc, char* argv[]) { + + Position pos; + string token, cmd; + + pos.set(StartFEN, false, &States->back(), Threads.main()); + + for (int i = 1; i < argc; ++i) + cmd += std::string(argv[i]) + " "; + + do { + if (argc == 1 && !getline(cin, cmd)) // Block here waiting for input or EOF + cmd = "quit"; + + istringstream is(cmd); + + token.clear(); // getline() could return empty or blank line + is >> skipws >> token; + + // The GUI sends 'ponderhit' to tell us to ponder on the same move the + // opponent has played. In case Signals.stopOnPonderhit is set we are + // waiting for 'ponderhit' to stop the search (for instance because we + // already ran out of time), otherwise we should continue searching but + // switching from pondering to normal search. + if ( token == "quit" + || token == "stop" + || (token == "ponderhit" && Search::Signals.stopOnPonderhit)) + { + Search::Signals.stop = true; + Threads.main()->start_searching(true); // Could be sleeping + } + else if (token == "ponderhit") + Search::Limits.ponder = 0; // Switch to normal search + + else if (token == "uci") + sync_cout << "id name " << engine_info(true) + << "\n" << Options + << "\nuciok" << sync_endl; + + else if (token == "ucinewgame") + { + Search::clear(); + Time.availableNodes = 0; + } + else if (token == "isready") sync_cout << "readyok" << sync_endl; + else if (token == "go") go(pos, is); + else if (token == "position") position(pos, is); + else if (token == "setoption") setoption(is); + + // Additional custom non-UCI commands, useful for debugging + else if (token == "flip") pos.flip(); + else if (token == "bench") benchmark(pos, is); + else if (token == "d") sync_cout << pos << sync_endl; + else if (token == "eval") sync_cout << Eval::trace(pos) << sync_endl; + else if (token == "perft") + { + int depth; + stringstream ss; + + is >> depth; + ss << Options["Hash"] << " " + << Options["Threads"] << " " << depth << " current perft"; + + benchmark(pos, ss); + } + else + sync_cout << "Unknown command: " << cmd << sync_endl; + + } while (token != "quit" && argc == 1); // Passed args have one-shot behaviour + + Threads.main()->wait_for_search_finished(); +} - // set_option() is called when Stockfish receives the "setoption" UCI - // command. The input parameter is a UCIParser. It is assumed - // that this parser has consumed the first token of the UCI command - // ("setoption"), and is ready to read the second token ("name", if - // the input is well-formed). - - void set_option(UCIParser& up) { - string token, name, value; +/// UCI::value() converts a Value to a string suitable for use with the UCI +/// protocol specification: +/// +/// cp The score from the engine's point of view in centipawns. +/// mate Mate in y moves, not plies. If the engine is getting mated +/// use negative values for y. - if (!(up >> token) || token != "name") // operator>>() skips any whitespace - return; +string UCI::value(Value v) { - if (!(up >> name)) - return; + stringstream ss; - // Handle names with included spaces - while (up >> token && token != "value") - name += (" " + token); + if (abs(v) < VALUE_MATE - MAX_PLY) + ss << "cp " << v * 100 / PawnValueEg; + else + ss << "mate " << (v > 0 ? VALUE_MATE - v + 1 : -VALUE_MATE - v) / 2; - if (Options.find(name) == Options.end()) - { - cout << "No such option: " << name << endl; - return; - } + return ss.str(); +} - // Is a button ? - if (token != "value") - { - Options[name].set_value("true"); - return; - } - if (!(up >> value)) - return; +/// UCI::square() converts a Square to a string in algebraic notation (g1, a7, etc.) - // Handle values with included spaces - while (up >> token) - value += (" " + token); +std::string UCI::square(Square s) { + return std::string{ char('a' + file_of(s)), char('1' + rank_of(s)) }; +} - Options[name].set_value(value); - } +/// UCI::move() converts a Move to a string in coordinate notation (g1f3, a7a8q). +/// The only special case is castling, where we print in the e1g1 notation in +/// normal chess mode, and in e1h1 notation in chess960 mode. Internally all +/// castling moves are always encoded as 'king captures rook'. - // go() is called when Stockfish receives the "go" UCI command. The - // input parameter is a UCIParser. It is assumed that this - // parser has consumed the first token of the UCI command ("go"), - // and is ready to read the second token. The function sets the - // thinking time and other parameters from the input string, and - // calls think() (defined in search.cpp) with the appropriate - // parameters. Returns false if a quit command is received while - // thinking, returns true otherwise. +string UCI::move(Move m, bool chess960) { - bool go(Position& pos, UCIParser& up) { + Square from = from_sq(m); + Square to = to_sq(m); - string token; + if (m == MOVE_NONE) + return "(none)"; - int time[2] = {0, 0}, inc[2] = {0, 0}; - int movesToGo = 0, depth = 0, nodes = 0, moveTime = 0; - bool infinite = false, ponder = false; - Move searchMoves[MOVES_MAX]; + if (m == MOVE_NULL) + return "0000"; - searchMoves[0] = MOVE_NONE; + if (type_of(m) == CASTLING && !chess960) + to = make_square(to > from ? FILE_G : FILE_C, rank_of(from)); - while (up >> token) - { - if (token == "infinite") - infinite = true; - else if (token == "ponder") - ponder = true; - else if (token == "wtime") - up >> time[0]; - else if (token == "btime") - up >> time[1]; - else if (token == "winc") - up >> inc[0]; - else if (token == "binc") - up >> inc[1]; - else if (token == "movestogo") - up >> movesToGo; - else if (token == "depth") - up >> depth; - else if (token == "nodes") - up >> nodes; - else if (token == "movetime") - up >> moveTime; - else if (token == "searchmoves") - { - int numOfMoves = 0; - while (up >> token) - searchMoves[numOfMoves++] = parse_uci_move(pos, token); - - searchMoves[numOfMoves] = MOVE_NONE; - } - } + string move = UCI::square(from) + UCI::square(to); - assert(pos.is_ok()); + if (type_of(m) == PROMOTION) + move += " pnbrqk"[promotion_type(m)]; - return think(pos, infinite, ponder, time, inc, movesToGo, - depth, nodes, moveTime, searchMoves); - } + return move; +} - void perft(Position& pos, UCIParser& up) { - int depth, tm; - int64_t n; +/// UCI::to_move() converts a string representing a move in coordinate notation +/// (g1f3, a7a8q) to the corresponding legal Move, if any. - if (!(up >> depth)) - return; +Move UCI::to_move(const Position& pos, string& str) { - tm = get_system_time(); + if (str.length() == 5) // Junior could send promotion piece in uppercase + str[4] = char(tolower(str[4])); - n = perft(pos, depth * ONE_PLY); + for (const auto& m : MoveList(pos)) + if (str == UCI::move(m, pos.is_chess960())) + return m; - tm = get_system_time() - tm; - std::cout << "\nNodes " << n - << "\nTime (ms) " << tm - << "\nNodes/second " << int(n / (tm / 1000.0)) << std::endl; - } + return MOVE_NONE; }