X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=b875eaf7f1840bd3d3b41553dbeed55538dc1730;hp=f45be99330064ab13604f0049ca56cc08fe1be89;hb=c2d42ea8339b49e52a116e488214a14fda09d413;hpb=d22aeb1cc02597c801c3ca5da094a39b1494a22b diff --git a/src/uci.cpp b/src/uci.cpp index f45be993..b875eaf7 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -1,385 +1,264 @@ /* - 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) 2008-2010 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. - + You should have received a copy of the GNU General Public License along with this program. If not, see . */ - -//// -//// Includes -//// - #include #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 "uci.h" +#include "thread.h" #include "ucioption.h" - -//// -//// Local definitions: -//// +using namespace std; namespace { - // UCIInputParser is a class for parsing UCI input. The class is - // very simple, and basically just consist of a string stream - // built on a given input string. There are methods for checking - // if we are at the end of the line, for getting the next token - // (defined as any whitespace-delimited sequence of characters), - // and for getting the rest of the line as a single string. - - class UCIInputParser { - - public: - UCIInputParser(const std::string &line); - std::string get_next_token(); - std::string get_rest_of_line(); - bool at_end_of_line(); + // FEN string of the initial position, normal chess + const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - private: - std::istringstream inputLineStream; + // Keep track of position keys along the setup moves (from start position to the + // position just before to start searching). This is needed by draw detection + // where, due to 50 moves rule, we need to check at most 100 plies back. + StateInfo StateRingBuf[102], *SetupState = StateRingBuf; - }; - - - // 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 wait_for_command(); - void handle_command(const std::string &command); - void set_option(UCIInputParser &uip); - void set_position(UCIInputParser &uip); - void go(UCIInputParser &uip); + void set_option(istringstream& up); + void set_position(Position& pos, istringstream& up); + void go(Position& pos, istringstream& up); + void perft(Position& pos, istringstream& up); } -//// -//// Functions -//// +/// Wait for a command from the user, parse this text string as an UCI command, +/// and call the appropriate functions. Also intercepts EOF from stdin to ensure +/// that we exit gracefully if the GUI dies unexpectedly. In addition to the UCI +/// commands, the function also supports a few debug commands. -/// 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. +void uci_loop() { -void uci_main_loop() { - RootPosition.from_fen(StartPosition); - while(1) wait_for_command(); -} + Position pos(StartFEN, false, 0); // The root position + string cmd, token; + while (token != "quit") + { + if (!getline(cin, cmd)) // Block here waiting for input + cmd = "quit"; -//// -//// Local functions -//// - -namespace { - - /// - /// Implementation of the UCIInputParser class. - /// + istringstream is(cmd); - // Constructor for the UCIInputParser class. The constructor takes a - // text string containing a single UCI command as input. + is >> skipws >> token; - UCIInputParser::UCIInputParser(const std::string &line) : inputLineStream(line) { } - - - // UCIInputParser::get_next_token() gets the next token in an UCI - // command. A 'token' in an UCI command is simply any - // whitespace-delimited sequence of characters. - - std::string UCIInputParser::get_next_token() { + if (token == "quit" || token == "stop") + { + Search::Signals.stop = true; + Threads[0].wake_up(); // In case is waiting for stop or ponderhit + } - std::string token; + else if (token == "ponderhit") + { + // The opponent has played the expected move. GUI sends "ponderhit" if + // we were told to ponder on the same move the opponent has played. We + // should continue searching but switching from pondering to normal search. + Search::Limits.ponder = false; - inputLineStream >> token; // operator >> skips any whitespace + if (Search::Signals.stopOnPonderhit) + Search::Signals.stop = true; - return token; - } + Threads[0].wake_up(); // In case is waiting for stop or ponderhit + } + else if (token == "go") + go(pos, is); - // UCIInputParser::get_rest_of_line() returns the rest of the input - // line (from the current location) as a single string. + else if (token == "ucinewgame") + pos.from_fen(StartFEN, false); - std::string UCIInputParser::get_rest_of_line() { + else if (token == "isready") + cout << "readyok" << endl; - std::string tail; + else if (token == "position") + set_position(pos, is); - std::getline(inputLineStream, tail); + else if (token == "setoption") + set_option(is); - return tail; - } + else if (token == "perft") + perft(pos, is); + else if (token == "d") + pos.print(); - // UCIInputParser::at_end_of_line() tests whether we have reached the - // end of the input string, i.e. if any more input remains to be - // parsed. + else if (token == "flip") + pos.flip_me(); - bool UCIInputParser::at_end_of_line() { + else if (token == "eval") + { + read_evaluation_uci_options(pos.side_to_move()); + cout << trace_evaluate(pos) << endl; + } - return inputLineStream.eof(); + else if (token == "key") + cout << "key: " << hex << pos.key() + << "\nmaterial key: " << pos.material_key() + << "\npawn key: " << pos.pawn_key() << endl; + + else if (token == "uci") + cout << "id name " << engine_name() + << "\nid author " << engine_authors() + << "\n" << Options.print_all() + << "\nuciok" << endl; + else + cout << "Unknown command: " << cmd << endl; } +} - /// - /// Other functions - /// - +namespace { - // wait_for_command() waits for a command from the user, and passes - // this command to handle_command. wait_for_command also intercepts - // EOF from stdin, by translating EOF to the "quit" command. This - // ensures that Glaurung exits gracefully if the GUI dies - // unexpectedly. + // set_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 wait_for_command() { + void set_position(Position& pos, istringstream& is) { - std::string command; + Move m; + string token, fen; - if (!std::getline(std::cin, command)) - command = "quit"; + is >> token; - handle_command(command); + 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; + + pos.from_fen(fen, Options["UCI_Chess960"].value()); + + // Parse move list (if any) + while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE) + { + pos.do_move(m, *SetupState); + + // Increment pointer to StateRingBuf circular buffer + if (++SetupState - StateRingBuf >= 102) + SetupState = StateRingBuf; + } } - // 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. - - void handle_command(const std::string &command) { + // set_option() is called when engine receives the "setoption" UCI command. The + // function updates the UCI option ("name") to the given value ("value"). - UCIInputParser uip(command); - std::string token = uip.get_next_token(); + void set_option(istringstream& is) { - 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.at_end_of_line()) { - std::cout << uip.get_next_token() << std::endl; - } - } - } + string token, name, value; + is >> token; // Consume "name" token - // 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). + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += string(" ", !name.empty()) + token; - void set_position(UCIInputParser &uip) { + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", !value.empty()) + token; - std::string token; + if (Options.find(name) != Options.end()) + Options[name].set_value(value.empty() ? "true" : value); // UCI buttons don't have "value" + else + cout << "No such option: " << name << endl; + } - token = uip.get_next_token(); - if(token == "startpos") - RootPosition.from_fen(StartPosition); - else if(token == "fen") { - std::string fen; - while(token != "moves" && !uip.at_end_of_line()) { - token = uip.get_next_token(); - fen += token; - fen += ' '; - } - RootPosition.from_fen(fen); - } - if(!uip.at_end_of_line()) { - if(token != "moves") - token = uip.get_next_token(); - if(token == "moves") { - Move move; - UndoInfo u; - while(!uip.at_end_of_line()) { - token = uip.get_next_token(); - move = move_from_string(RootPosition, token); - RootPosition.do_move(move, u); - if(RootPosition.rule_50_counter() == 0) - RootPosition.reset_game_ply(); - } - } + // go() is called when engine receives the "go" UCI command. The function sets + // the thinking time and other parameters from the input string, and then starts + // the main searching thread. + + void go(Position& pos, istringstream& is) { + + string token; + Search::LimitsType limits; + std::vector searchMoves; + int time[] = { 0, 0 }, inc[] = { 0, 0 }; + + while (is >> token) + { + if (token == "infinite") + limits.infinite = true; + else if (token == "ponder") + limits.ponder = true; + else if (token == "wtime") + is >> time[WHITE]; + else if (token == "btime") + is >> time[BLACK]; + else if (token == "winc") + is >> inc[WHITE]; + else if (token == "binc") + is >> inc[BLACK]; + else if (token == "movestogo") + is >> limits.movesToGo; + else if (token == "depth") + is >> limits.maxDepth; + else if (token == "nodes") + is >> limits.maxNodes; + else if (token == "movetime") + is >> limits.maxTime; + else if (token == "searchmoves") + while (is >> token) + searchMoves.push_back(move_from_uci(pos, token)); } - } + limits.time = time[pos.side_to_move()]; + limits.increment = inc[pos.side_to_move()]; - // 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). - - void set_option(UCIInputParser &uip) { - - std::string token; - - if(!uip.at_end_of_line()) { - token = uip.get_next_token(); - if(token == "name" && !uip.at_end_of_line()) { - std::string name = uip.get_next_token(); - std::string nextToken; - while(!uip.at_end_of_line() - && (nextToken = uip.get_next_token()) != "value") - name += (" " + nextToken); - if(nextToken == "value") - set_option_value(name, uip.get_rest_of_line()); - else - push_button(name); - } - } + Threads.start_thinking(pos, limits, searchMoves, true); } - // 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. + // perft() is called when engine receives the "perft" command. The function + // calls perft() with the required search depth then prints counted leaf nodes + // and elapsed time. - void go(UCIInputParser &uip) { + void perft(Position& pos, istringstream& is) { - std::string token; + int depth, time; - int time[2] = {0, 0}, inc[2] = {0, 0}, movesToGo = 0, depth = 0, nodes = 0; - int moveTime = 0; - bool infinite = false, ponder = false; - Move searchMoves[500]; + if (!(is >> depth)) + return; - searchMoves[0] = MOVE_NONE; + time = system_time(); - while(!uip.at_end_of_line()) { - token = uip.get_next_token(); - - if(token == "infinite") - infinite = true; - else if(token == "ponder") - ponder = true; - else if(token == "wtime") { - if(!uip.at_end_of_line()) - time[0] = atoi(uip.get_next_token().c_str()); - } - else if(token == "btime") { - if(!uip.at_end_of_line()) - time[1] = atoi(uip.get_next_token().c_str()); - } - else if(token == "winc") { - if(!uip.at_end_of_line()) - inc[0] = atoi(uip.get_next_token().c_str()); - } - else if(token == "binc") { - if(!uip.at_end_of_line()) - inc[1] = atoi(uip.get_next_token().c_str()); - } - else if(token == "movestogo") { - if(!uip.at_end_of_line()) - movesToGo = atoi(uip.get_next_token().c_str()); - } - else if(token == "depth") { - if(!uip.at_end_of_line()) - depth = atoi(uip.get_next_token().c_str()); - } - else if(token == "nodes") { - if(!uip.at_end_of_line()) - nodes = atoi(uip.get_next_token().c_str()); - } - else if(token == "movetime") { - if(!uip.at_end_of_line()) - moveTime = atoi(uip.get_next_token().c_str()); - } - else if(token == "searchmoves" && !uip.at_end_of_line()) { - int numOfMoves = 0; - while(!uip.at_end_of_line()) { - token = uip.get_next_token(); - searchMoves[numOfMoves++] = move_from_string(RootPosition, token); - } - searchMoves[numOfMoves] = MOVE_NONE; - } - } + int64_t n = Search::perft(pos, depth * ONE_PLY); - if(moveTime) - infinite = true; // HACK + time = system_time() - time; - think(RootPosition, infinite, ponder, time[RootPosition.side_to_move()], - inc[RootPosition.side_to_move()], movesToGo, depth, nodes, moveTime, - searchMoves); + std::cout << "\nNodes " << n + << "\nTime (ms) " << time + << "\nNodes/second " << int(n / (time / 1000.0)) << std::endl; } - }