X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=9948eb62b4114670d826ec7e32c3f9012f53e0e0;hp=6862a5e84dc6cac3ef7f2efaefc8681929128f56;hb=60c121f3b1ee7d5ced3435cc1718e4e6e6fd8383;hpb=18860cce406f9646cb6af218c2b23f51d2e47b8d diff --git a/src/uci.cpp b/src/uci.cpp index 6862a5e8..f05a114e 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -1,13 +1,14 @@ /* - 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) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad - 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. @@ -16,310 +17,264 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - #include #include #include -#include "book.h" #include "evaluate.h" -#include "misc.h" -#include "move.h" #include "movegen.h" #include "position.h" -#include "san.h" #include "search.h" +#include "thread.h" +#include "tt.h" #include "uci.h" -#include "ucioption.h" +using namespace std; -//// -//// Local definitions: -//// +extern void benchmark(const Position& pos, istream& is); namespace { - // UCIInputParser is a class for parsing UCI input. The class - // is actually a string stream built on a given input string. + // FEN string of the initial position, normal chess + const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - typedef std::istringstream UCIInputParser; + // Stack 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. + Search::StateStackPtr SetupStates; - // The root position. This is set up when the user (or in practice, the GUI) - // sends the "position" UCI command. The root position is sent to the think() - // function when the program receives the "go" command. - Position RootPosition; - // Local functions - void get_command(); - void handle_command(const std::string &command); - void set_option(UCIInputParser &uip); - void set_position(UCIInputParser &uip); - void go(UCIInputParser &uip); -} + // 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"). + void position(Position& pos, istringstream& is) { -//// -//// Functions -//// + Move m; + string token, fen; -/// uci_main_loop() is the only global function in this file. It is -/// called immediately after the program has finished initializing. -/// The program remains in this loop until it receives the "quit" UCI -/// command. + is >> token; -void uci_main_loop() { + 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; - RootPosition.from_fen(StartPosition); + pos.set(fen, Options["UCI_Chess960"], Threads.main()); + SetupStates = Search::StateStackPtr(new std::stack()); - while (1) - get_command(); -} + // Parse move list (if any) + while (is >> token && (m = UCI::to_move(pos, token)) != MOVE_NONE) + { + SetupStates->push(StateInfo()); + pos.do_move(m, SetupStates->top()); + } + } -//// -//// Local functions -//// + // setoption() is called when engine receives the "setoption" UCI command. The + // function updates the UCI option ("name") to the given value ("value"). -namespace { + void setoption(istringstream& is) { - // get_command() waits for a command from the user, and passes - // this command to handle_command. get_command also intercepts - // EOF from stdin, by translating EOF to the "quit" command. This - // ensures that Glaurung exits gracefully if the GUI dies - // unexpectedly. + string token, name, value; - void get_command() { + is >> token; // Consume "name" token - std::string command; + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += string(" ", !name.empty()) + token; - if (!std::getline(std::cin, command)) - command = "quit"; + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", !value.empty()) + token; - handle_command(command); + if (Options.count(name)) + Options[name] = value; + else + sync_cout << "No such option: " << name << sync_endl; } - // handle_command() takes a text string as input, uses a - // UCIInputParser 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. + // 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. - void handle_command(const std::string &command) { + void go(const Position& pos, istringstream& is) { - UCIInputParser uip(command); - std::string token; + Search::LimitsType limits; + string token; - uip >> token; // operator >> skips any whitespace + while (is >> token) + if (token == "searchmoves") + while (is >> token) + limits.searchmoves.push_back(UCI::to_move(pos, token)); - if (token == "quit") - { - OpeningBook.close(); - stop_threads(); - quit_eval(); - exit(0); - } - else if (token == "uci") - { - std::cout << "id name " << engine_name() << std::endl; - std::cout << "id author Tord Romstad" << std::endl; - print_uci_options(); - std::cout << "uciok" << std::endl; - } - else if (token == "ucinewgame") - { - TT.clear(); - Position::init_piece_square_tables(); - RootPosition.from_fen(StartPosition); - } - else if (token == "isready") - std::cout << "readyok" << std::endl; - else if (token == "position") - set_position(uip); - else if (token == "setoption") - set_option(uip); - else if (token == "go") - go(uip); - - // The remaining commands are for debugging purposes only. - // Perhaps they should be removed later in order to reduce the - // size of the program binary. - else if (token == "d") - RootPosition.print(); - else if (token == "flip") - { - Position p(RootPosition); - RootPosition.flipped_copy(p); - } - else if (token == "eval") - { - EvalInfo ei; - std::cout << "Incremental mg: " << RootPosition.mg_value() - << std::endl; - std::cout << "Incremental eg: " << RootPosition.eg_value() - << std::endl; - std::cout << "Full eval: " - << evaluate(RootPosition, ei, 0) - << std::endl; - } - else if (token == "key") - { - std::cout << "key: " << RootPosition.get_key() - << " material key: " << RootPosition.get_material_key() - << " pawn key: " << RootPosition.get_pawn_key() - << std::endl; - } - else - { - std::cout << "Unknown command: " << command << std::endl; - while (!uip.eof()) - { - uip >> token; - std::cout << token << std::endl; - } - } + 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 = true; + else if (token == "ponder") limits.ponder = true; + + Threads.start_thinking(pos, limits, SetupStates); } +} // 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(StartFEN, false, Threads.main()); // The root position + string token, cmd; + + 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()->notify_one(); // Could be sleeping + } + else if (token == "ponderhit") + Search::Limits.ponder = false; // Switch to normal search + + else if (token == "uci") + sync_cout << "id name " << engine_info(true) + << "\n" << Options + << "\nuciok" << sync_endl; + + else if (token == "isready") sync_cout << "readyok" << sync_endl; + else if (token == "ucinewgame") TT.clear(); + 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.wait_for_think_finished(); // Cannot quit whilst the search is running +} - // set_position() is called when Glaurung receives the "position" UCI - // command. The input parameter is a UCIInputParser. 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(UCIInputParser &uip) { +/// 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. - std::string token; +string UCI::value(Value v) { - uip >> token; // operator >> skips any whitespace + stringstream ss; - if (token == "startpos") - RootPosition.from_fen(StartPosition); - else if (token == "fen") - { - std::string fen; - while (token != "moves" && !uip.eof()) - { - uip >> token; - fen += token; - fen += ' '; - } - RootPosition.from_fen(fen); - } + 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 (!uip.eof()) - { - if (token != "moves") - uip >> token; - if (token == "moves") - { - Move move; - UndoInfo u; - while (!uip.eof()) - { - uip >> token; - move = move_from_string(RootPosition, token); - RootPosition.do_move(move, u); - if (RootPosition.rule_50_counter() == 0) - RootPosition.reset_game_ply(); - } - } - } - } + return ss.str(); +} - // set_option() is called when Glaurung receives the "setoption" UCI - // command. The input parameter is a UCIInputParser. 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). +/// UCI::square() converts a Square to a string in algebraic notation (g1, a7, etc.) - void set_option(UCIInputParser &uip) { +std::string UCI::square(Square s) { + return std::string{ char('a' + file_of(s)), char('1' + rank_of(s)) }; +} - std::string token, name; - uip >> token; - if (token == "name") - { - uip >> name; - uip >> token; - while (!uip.eof() && token != "value") - { - name += (" " + token); - uip >> token; - } - if (token == "value") - { - std::getline(uip, token); // reads until end of line - set_option_value(name, token); - } else - push_button(name); - } - } +/// 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'. +string UCI::move(Move m, bool chess960) { - // go() is called when Glaurung receives the "go" UCI command. The - // input parameter is a UCIInputParser. 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. + Square from = from_sq(m); + Square to = to_sq(m); - void go(UCIInputParser &uip) { + if (m == MOVE_NONE) + return "(none)"; - std::string token; + if (m == MOVE_NULL) + return "0000"; - 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[500]; + if (type_of(m) == CASTLING && !chess960) + to = make_square(to > from ? FILE_G : FILE_C, rank_of(from)); - searchMoves[0] = MOVE_NONE; + string move = UCI::square(from) + UCI::square(to); - while (!uip.eof()) - { - uip >> token; - - if (token == "infinite") - infinite = true; - else if (token == "ponder") - ponder = true; - else if (token == "wtime") - uip >> time[0]; - else if (token == "btime") - uip >> time[1]; - else if (token == "winc") - uip >> inc[0]; - else if (token == "binc") - uip >> inc[1]; - else if (token == "movestogo") - uip >> movesToGo; - else if (token == "depth") - uip >> depth; - else if (token == "nodes") - uip >> nodes; - else if (token == "movetime") - uip >> moveTime; - else if (token == "searchmoves") - { - int numOfMoves = 0; - while (!uip.eof()) - { - uip >> token; - searchMoves[numOfMoves++] = move_from_string(RootPosition, token); - } - searchMoves[numOfMoves] = MOVE_NONE; - } - } + if (type_of(m) == PROMOTION) + move += " pnbrqk"[promotion_type(m)]; - if (moveTime) - infinite = true; // HACK + return move; +} - think(RootPosition, infinite, ponder, RootPosition.side_to_move(), time, - inc, movesToGo, depth, nodes, moveTime, searchMoves); - } + +/// UCI::to_move() converts a string representing a move in coordinate notation +/// (g1f3, a7a8q) to the corresponding 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 (const ExtMove& ms : MoveList(pos)) + if (str == UCI::move(ms.move, pos.is_chess960())) + return ms.move; + + return MOVE_NONE; }