X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=ad7a8d133f95eb9e897e1da3a6eea2e4d78d8acb;hp=5a302a8d1b9d44286a39be48aeb25bcd69607ec0;hb=0436f01d05f05e2669cbb5b4bee752145b5b9991;hpb=321320b0814d5994640977cf96e015eba8ce22d5 diff --git a/src/uci.cpp b/src/uci.cpp index 5a302a8d..6e560572 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) 2015-2019 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 @@ -23,229 +24,292 @@ #include #include "evaluate.h" -#include "misc.h" -#include "move.h" +#include "movegen.h" #include "position.h" #include "search.h" -#include "ucioption.h" +#include "thread.h" +#include "timeman.h" +#include "tt.h" +#include "uci.h" +#include "syzygy/tbprobe.h" using namespace std; -namespace { +extern vector setup_bench(const Position&, istream&); - // FEN string for the initial position - const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; +namespace { - // UCIParser is a class for parsing UCI input. The class - // is actually a string stream built on a given input string. - typedef istringstream UCIParser; + // FEN string of the initial position, normal chess + const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - void set_option(UCIParser& up); - void set_position(Position& pos, UCIParser& up); - bool go(Position& pos, UCIParser& up); - void perft(Position& pos, UCIParser& up); -} + // 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, StateListPtr& states) { -bool execute_uci_command(const string& cmd) { - - static Position pos(StartPositionFEN, false, 0); // The root position + Move m; + string token, fen; - UCIParser up(cmd); - string token; + is >> token; - up >> token; // operator>>() skips any whitespace + 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 == "quit") - return false; + states = StateListPtr(new std::deque(1)); // Drop old and create a new one + pos.set(fen, Options["UCI_Chess960"], &states->back(), Threads.main()); - if (token == "go") - return go(pos, up); + // Parse move list (if any) + while (is >> token && (m = UCI::to_move(pos, token)) != MOVE_NONE) + { + states->emplace_back(); + pos.do_move(m, states->back()); + } + } - if (token == "ucinewgame") - pos.from_fen(StartPositionFEN, false); - else if (token == "isready") - cout << "readyok" << endl; + // 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 == "position") - set_position(pos, up); + void setoption(istringstream& is) { - else if (token == "setoption") - set_option(up); + string token, name, value; - else if (token == "perft") - perft(pos, up); + is >> token; // Consume "name" token - else if (token == "d") - pos.print(); + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += (name.empty() ? "" : " ") + token; - else if (token == "flip") - pos.flip(); + // Read option value (can contain spaces) + while (is >> token) + value += (value.empty() ? "" : " ") + token; - else if (token == "eval") - { - read_evaluation_uci_options(pos.side_to_move()); - cout << trace_evaluate(pos) << endl; + if (Options.count(name)) + Options[name] = value; + else + sync_cout << "No such option: " << name << sync_endl; } - else if (token == "key") - cout << "key: " << hex << pos.get_key() - << "\nmaterial key: " << pos.get_material_key() - << "\npawn key: " << pos.get_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; + // 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. - return true; -} + void go(Position& pos, istringstream& is, StateListPtr& states) { + Search::LimitsType limits; + string token; + bool ponderMode = false; + + 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 == "perft") is >> limits.perft; + else if (token == "infinite") limits.infinite = 1; + else if (token == "ponder") ponderMode = true; + + Threads.start_thinking(pos, states, limits, ponderMode); + } -namespace { - // 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"). + // bench() is called when engine receives the "bench" command. Firstly + // a list of UCI commands is setup according to bench parameters, then + // it is run one by one printing a summary at the end. - void set_position(Position& pos, UCIParser& up) { + void bench(Position& pos, istream& args, StateListPtr& states) { - string token, fen; + string token; + uint64_t num, nodes = 0, cnt = 1; - up >> token; // operator>>() skips any whitespace + vector list = setup_bench(pos, args); + num = count_if(list.begin(), list.end(), [](string s) { return s.find("go ") == 0; }); - if (token == "startpos") - { - pos.from_fen(StartPositionFEN, false); - up >> token; // Consume "moves" token if any - } - else if (token == "fen") + TimePoint elapsed = now(); + + for (const auto& cmd : list) { - while (up >> token && token != "moves") - fen += token + " "; + istringstream is(cmd); + is >> skipws >> token; - pos.from_fen(fen, Options["UCI_Chess960"].value()); + if (token == "go") + { + cerr << "\nPosition: " << cnt++ << '/' << num << endl; + go(pos, is, states); + Threads.main()->wait_for_search_finished(); + nodes += Threads.nodes_searched(); + } + else if (token == "setoption") setoption(is); + else if (token == "position") position(pos, is, states); + else if (token == "ucinewgame") { Search::clear(); elapsed = now(); } // Search::clear() may take some while } - else return; - // Parse move list (if any) - while (up >> token) - pos.do_setup_move(move_from_uci(pos, token)); + elapsed = now() - elapsed + 1; // Ensure positivity to avoid a 'divide by zero' + + dbg_print(); // Just before exiting + + cerr << "\n===========================" + << "\nTotal time (ms) : " << elapsed + << "\nNodes searched : " << nodes + << "\nNodes/second : " << 1000 * nodes / elapsed << endl; } +} // namespace - // set_option() is called when engine receives the "setoption" UCI - // command. The function updates the corresponding UCI option ("name") - // to the given value ("value"). - void set_option(UCIParser& up) { +/// 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. - string token, name; - string value = "true"; // UCI buttons don't have a "value" field +void UCI::loop(int argc, char* argv[]) { - up >> token; // Consume "name" token - up >> name; // Read option name + Position pos; + string token, cmd; + StateListPtr states(new std::deque(1)); + auto uiThread = std::make_shared(0); - // Handle names with included spaces - while (up >> token && token != "value") - name += " " + token; + pos.set(StartFEN, false, &states->back(), uiThread.get()); - up >> value; // Read option value + for (int i = 1; i < argc; ++i) + cmd += std::string(argv[i]) + " "; - // Handle values with included spaces - while (up >> token) - value += " " + token; + do { + if (argc == 1 && !getline(cin, cmd)) // Block here waiting for input or EOF + cmd = "quit"; - if (Options.find(name) != Options.end()) - Options[name].set_value(value); - else - cout << "No such option: " << name << endl; - } + istringstream is(cmd); + token.clear(); // Avoid a stale if getline() returns empty or blank line + is >> skipws >> token; - // 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 calls think(). Returns false if a quit command - // is received while thinking, true otherwise. + if ( token == "quit" + || token == "stop") + Threads.stop = true; - bool go(Position& pos, UCIParser& up) { + // The GUI sends 'ponderhit' to tell us the user has played the expected move. + // So 'ponderhit' will be sent if we were told to ponder on the same move the + // user has played. We should continue searching but switch from pondering to + // normal search. + else if (token == "ponderhit") + Threads.main()->ponder = false; // Switch to normal search - string token; - SearchLimits limits; - Move searchMoves[MAX_MOVES] = { MOVE_NONE }; - Move* cur = searchMoves; - int time[] = { 0, 0 }, inc[] = { 0, 0 }; + else if (token == "uci") + sync_cout << "id name " << engine_info(true) + << "\n" << Options + << "\nuciok" << sync_endl; - while (up >> token) - { - if (token == "infinite") - limits.infinite = true; - else if (token == "ponder") - limits.ponder = true; - else if (token == "wtime") - up >> time[WHITE]; - else if (token == "btime") - up >> time[BLACK]; - else if (token == "winc") - up >> inc[WHITE]; - else if (token == "binc") - up >> inc[BLACK]; - else if (token == "movestogo") - up >> limits.movesToGo; - else if (token == "depth") - up >> limits.maxDepth; - else if (token == "nodes") - up >> limits.maxNodes; - else if (token == "movetime") - up >> limits.maxTime; - else if (token == "searchmoves") - { - while (up >> token) - *cur++ = move_from_uci(pos, token); + else if (token == "setoption") setoption(is); + else if (token == "go") go(pos, is, states); + else if (token == "position") position(pos, is, states); + else if (token == "ucinewgame") Search::clear(); + else if (token == "isready") sync_cout << "readyok" << sync_endl; - *cur = MOVE_NONE; - } - } + // Additional custom non-UCI commands, mainly for debugging + else if (token == "flip") pos.flip(); + else if (token == "bench") bench(pos, is, states); + else if (token == "d") sync_cout << pos << sync_endl; + else if (token == "eval") sync_cout << Eval::trace(pos) << sync_endl; + else if (token == "compiler") sync_cout << compiler_info() << sync_endl; + else + sync_cout << "Unknown command: " << cmd << sync_endl; - assert(pos.is_ok()); + } while (token != "quit" && argc == 1); // Command line args are one-shot +} - limits.time = time[pos.side_to_move()]; - limits.increment = inc[pos.side_to_move()]; - return think(pos, limits, searchMoves); - } +/// 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) { - // perft() is called when engine receives the "perft" command. - // The function calls perft() passing the required search depth - // then prints counted nodes and elapsed time. + assert(-VALUE_INFINITE < v && v < VALUE_INFINITE); - void perft(Position& pos, UCIParser& up) { + stringstream ss; - int depth, time; - int64_t n; + 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 (!(up >> depth)) - return; + return ss.str(); +} - time = get_system_time(); - n = perft(pos, depth * ONE_PLY); +/// UCI::square() converts a Square to a string in algebraic notation (g1, a7, etc.) - time = get_system_time() - time; +std::string UCI::square(Square s) { + return std::string{ char('a' + file_of(s)), char('1' + rank_of(s)) }; +} - std::cout << "\nNodes " << n - << "\nTime (ms) " << time - << "\nNodes/second " << int(n / (time / 1000.0)) << std::endl; - } + +/// 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; }