X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=a9811a9af7352ae74308979a4751721b6bfcc042;hp=dd4040d732397c8752d5d9096b520afb280f7967;hb=94e41274bba2d8a2f2d58aaa711df5872309d66c;hpb=e1919384a23fe728422f995369161efa192380db diff --git a/src/uci.cpp b/src/uci.cpp index dd4040d7..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) 2008-2012 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 @@ -22,134 +23,34 @@ #include #include "evaluate.h" -#include "misc.h" +#include "movegen.h" #include "position.h" #include "search.h" #include "thread.h" -#include "ucioption.h" +#include "timeman.h" +#include "uci.h" using namespace std; -extern void benchmark(istringstream& is); +extern void benchmark(const Position& pos, istream& is); namespace { // FEN string of the initial position, normal chess const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - // 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; + // 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)); - void set_option(istringstream& up); - void set_position(Position& pos, istringstream& up); - void go(Position& pos, istringstream& up); - void perft(Position& pos, istringstream& up); -} - - -/// 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. - -void uci_loop(const string& args) { - - Position pos(StartFEN, false); // The root position - string cmd, token; - - while (token != "quit") - { - if (!args.empty()) - cmd = args; - - else if (!getline(cin, cmd)) // Block here waiting for input - cmd = "quit"; - - istringstream is(cmd); - - is >> skipws >> token; - - if (token == "quit" || token == "stop") - { - Search::Signals.stop = true; - Threads.wait_for_search_finished(); // Cannot quit while threads are running - } - - 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; - - if (Search::Signals.stopOnPonderhit) - { - Search::Signals.stop = true; - Threads.wait_for_search_finished(); // Wake up if is sleeping - } - } - - else if (token == "go") - go(pos, is); - - else if (token == "ucinewgame") - { /* Avoid returning "Unknown command" */ } - - else if (token == "isready") - cout << "readyok" << endl; - - else if (token == "position") - set_position(pos, is); - - else if (token == "setoption") - set_option(is); - else if (token == "perft") - perft(pos, is); - - else if (token == "d") - pos.print(); - - else if (token == "flip") - pos.flip(); - - else if (token == "eval") - cout << Eval::trace(pos) << endl; - - else if (token == "bench") - benchmark(is); - - 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_info(true) - << "\n" << Options - << "\nuciok" << endl; - else - cout << "Unknown command: " << cmd << endl; - - if (!args.empty()) // Command line arguments have one-shot behaviour - { - Threads.wait_for_search_finished(); - break; - } - } -} - - -namespace { + // 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"). - // 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 set_position(Position& pos, istringstream& is) { + void position(Position& pos, istringstream& is) { Move m; string token, fen; @@ -167,24 +68,22 @@ namespace { else return; - pos.from_fen(fen, Options["UCI_Chess960"]); + States = StateListPtr(new std::deque(1)); + pos.set(fen, Options["UCI_Chess960"], &States->back(), Threads.main()); // Parse move list (if any) - while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE) + while (is >> token && (m = UCI::to_move(pos, token)) != MOVE_NONE) { - pos.do_move(m, *SetupState); - - // Increment pointer to StateRingBuf circular buffer - if (++SetupState - StateRingBuf >= 102) - SetupState = StateRingBuf; + States->push_back(StateInfo()); + pos.do_move(m, States->back(), pos.gives_check(m, CheckInfo(pos))); } } - // set_option() is called when engine receives the "setoption" UCI command. The + // setoption() is called when engine receives the "setoption" UCI command. The // function updates the UCI option ("name") to the given value ("value"). - void set_option(istringstream& is) { + void setoption(istringstream& is) { string token, name, value; @@ -192,79 +91,199 @@ namespace { // Read option name (can contain spaces) while (is >> token && token != "value") - name += string(" ", !name.empty()) + token; + name += string(" ", name.empty() ? 0 : 1) + token; // Read option value (can contain spaces) while (is >> token) - value += string(" ", !value.empty()) + token; + value += string(" ", value.empty() ? 0 : 1) + token; if (Options.count(name)) Options[name] = value; else - cout << "No such option: " << name << endl; + sync_cout << "No such option: " << name << sync_endl; } // 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 thinking time and other parameters from the input string, then starts // the search. - void go(Position& pos, istringstream& is) { + void go(const Position& pos, istringstream& is) { Search::LimitsType limits; - vector searchMoves; string token; + limits.startTime = now(); // As early as possible! + while (is >> token) - { - 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 == "infinite") - limits.infinite = true; - else if (token == "ponder") - limits.ponder = true; - else if (token == "searchmoves") + if (token == "searchmoves") while (is >> token) - searchMoves.push_back(move_from_uci(pos, token)); - } - - Threads.start_searching(pos, limits, searchMoves); + 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 - // 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 perft(Position& pos, istringstream& is) { +/// 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. - int depth; +void UCI::loop(int argc, char* argv[]) { - if (!(is >> depth)) - return; + Position pos; + string token, cmd; - Time time = Time::current_time(); + pos.set(StartFEN, false, &States->back(), Threads.main()); - int64_t n = Search::perft(pos, depth * ONE_PLY); + for (int i = 1; i < argc; ++i) + cmd += std::string(argv[i]) + " "; - int e = time.elapsed(); + do { + if (argc == 1 && !getline(cin, cmd)) // Block here waiting for input or EOF + cmd = "quit"; - cout << "\nNodes " << n - << "\nTime (ms) " << e - << "\nNodes/second " << int(n / (e / 1000.0)) << endl; - } + 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(); +} + + +/// 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. + +string UCI::value(Value v) { + + stringstream ss; + + 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; + + return ss.str(); +} + + +/// UCI::square() converts a Square to a string in algebraic notation (g1, a7, etc.) + +std::string UCI::square(Square s) { + return std::string{ char('a' + file_of(s)), char('1' + rank_of(s)) }; +} + + +/// 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) { + + 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 = UCI::square(from) + UCI::square(to); + + if (type_of(m) == PROMOTION) + move += " pnbrqk"[promotion_type(m)]; + + return move; +} + + +/// 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 auto& m : MoveList(pos)) + if (str == UCI::move(m, pos.is_chess960())) + return m; + + return MOVE_NONE; }