X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=876bb1d90718bfc6870ea302ed2af02b6b93a704;hp=88c1229e320ea804c4ef277f29c7c0d4da95013c;hb=94dd204c3b10ebe0e6c8df5d7c98de5ba4906cad;hpb=2f6927ac08887ff3b709cfe9228b27a85bdd1d88 diff --git a/src/uci.cpp b/src/uci.cpp index 88c1229e..876bb1d9 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -1,7 +1,7 @@ /* 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) 2008-2014 Marco Costalba, Joona Kiiski, 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 @@ -17,309 +17,276 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - -#include +#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 "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 istringstream UCIInputParser; + // Keep a track of the position keys along the setup moves (from the start position + // to the position just before the search starts). This is needed by the repetition + // draw detection code. + 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(0); - // Local functions - bool handle_command(const string& command); - void set_option(UCIInputParser& uip); - void set_position(UCIInputParser& uip); - bool go(UCIInputParser& uip); - void perft(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. It waits for a command from the user, and passes this -/// command to handle_command and also intercepts EOF from stdin, -/// by translating EOF to the "quit" command. This ensures that Stockfish -/// exits gracefully if the GUI dies unexpectedly. + 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); - string command; + pos.set(fen, Options["UCI_Chess960"], Threads.main()); + SetupStates = Search::StateStackPtr(new std::stack()); - do { - // Wait for a command from stdin - if (!getline(cin, command)) - command = "quit"; + // 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()); + } + } - } while (handle_command(command)); -} + // setoption() is called when engine receives the "setoption" UCI command. The + // function updates the UCI option ("name") to the given value ("value"). -//// -//// Local functions -//// + void setoption(istringstream& is) { -namespace { + string token, name, value; - // 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. + is >> token; // Consume "name" token - bool handle_command(const string& command) { + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += string(" ", !name.empty()) + token; - UCIInputParser uip(command); - string token; + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", !value.empty()) + token; - if (!(uip >> token)) // operator>>() skips any whitespace - return true; + if (Options.count(name)) + Options[name] = value; + else + sync_cout << "No such option: " << name << sync_endl; + } - if (token == "quit") - return false; - if (token == "go") - return go(uip); + // go() is called when engine receives the "go" UCI command. The function sets + // the thinking time and other parameters from the input string, and starts + // the search. - if (token == "uci") - { - cout << "id name " << engine_name() - << "\nid author Tord Romstad, Marco Costalba, Joona Kiiski\n"; - print_uci_options(); - cout << "uciok" << endl; - } - else if (token == "ucinewgame") - { - push_button("New Game"); - Position::init_piece_square_tables(); - RootPosition.from_fen(StartPosition); - } - else if (token == "isready") - cout << "readyok" << endl; - else if (token == "position") - set_position(uip); - else if (token == "setoption") - set_option(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.thread()); - RootPosition.flipped_copy(p); - } - else if (token == "eval") + void go(const Position& pos, istringstream& is) { + + Search::LimitsType limits; + string token; + + while (is >> token) { - EvalInfo ei; - cout << "Incremental mg: " << mg_value(RootPosition.value()) - << "\nIncremental eg: " << eg_value(RootPosition.value()) - << "\nFull eval: " << evaluate(RootPosition, ei, 0) << endl; + 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 = true; + else if (token == "ponder") limits.ponder = true; } - else if (token == "key") - cout << "key: " << hex << RootPosition.get_key() - << "\nmaterial key: " << RootPosition.get_material_key() - << "\npawn key: " << RootPosition.get_pawn_key() << endl; - else if (token == "perft") - perft(uip); - else - cout << "Unknown command: " << command << endl; - return true; + Threads.start_thinking(pos, limits, SetupStates); } +} // namespace - // set_position() is called when Stockfish 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) { +/// 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. - string token; +void UCI::loop(int argc, char* argv[]) { - if (!(uip >> token)) // operator>>() skips any whitespace - return; + Position pos(StartFEN, false, Threads.main()); // The root position + string token, cmd; - if (token == "startpos") - RootPosition.from_fen(StartPosition); - else if (token == "fen") - { - string fen; - while (uip >> token && token != "moves") - { - fen += token; - fen += ' '; - } - RootPosition.from_fen(fen); - } + for (int i = 1; i < argc; ++i) + cmd += std::string(argv[i]) + " "; - if (uip.good()) - { - if (token != "moves") - uip >> token; - - if (token == "moves") - { - Move move; - StateInfo st; - while (uip >> token) - { - move = move_from_string(RootPosition, token); - RootPosition.do_move(move, st); - if (RootPosition.rule_50_counter() == 0) - RootPosition.reset_ply(); - } - // Our StateInfo st is about going out of scope so copy - // its content inside RootPosition before they disappear. - RootPosition.detach(); - } - } - } + do { + if (argc == 1 && !getline(cin, cmd)) // Block here waiting for input + cmd = "quit"; + + istringstream is(cmd); + + token.clear(); // getline() could return empty or blank line + is >> skipws >> token; + + if (token == "quit" || token == "stop" || token == "ponderhit") + { + // 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 + // switch from pondering to normal search. + if (token != "ponderhit" || Search::Signals.stopOnPonderhit) + { + Search::Signals.stop = true; + Threads.main()->notify_one(); // Could be sleeping + } + else + Search::Limits.ponder = false; + } + else if (token == "perft") + { + int depth; + stringstream ss; + + is >> depth; + ss << Options["Hash"] << " " + << Options["Threads"] << " " << depth << " current " << token; + + benchmark(pos, ss); + } + else if (token == "key") + sync_cout << hex << uppercase << setfill('0') + << "position key: " << setw(16) << pos.key() + << "\nmaterial key: " << setw(16) << pos.material_key() + << "\npawn key: " << setw(16) << pos.pawn_key() + << dec << nouppercase << setfill(' ') << sync_endl; + + else if (token == "uci") + sync_cout << "id name " << engine_info(true) + << "\n" << Options + << "\nuciok" << 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); + 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 == "isready") sync_cout << "readyok" << sync_endl; + else if (token == "eval") sync_cout << Eval::trace(pos) << sync_endl; + 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_option() is called when Stockfish 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). +/// format_value() converts a Value to a string suitable for use with the UCI +/// protocol specifications: +/// +/// 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. - void set_option(UCIInputParser& uip) { +string UCI::format_value(Value v, Value alpha, Value beta) { - string token, name, value; + stringstream ss; - if (!(uip >> token)) // operator>>() skips any whitespace - return; + 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 (token == "name" && uip >> name) - { - while (uip >> token && token != "value") - name += (" " + token); + ss << (v >= beta ? " lowerbound" : v <= alpha ? " upperbound" : ""); - if (token == "value" && uip >> value) - { - while (uip >> token) - value += (" " + token); + return ss.str(); +} - set_option_value(name, value); - } else - push_button(name); - } - } +/// format_square() converts a Square to a string (g1, a7, etc.) - // go() is called when Stockfish 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. Returns false if a quit command is received while - // thinking, returns true otherwise. +std::string UCI::format_square(Square s) { - bool go(UCIInputParser& uip) { + char ch[] = { char('a' + file_of(s)), + char('1' + rank_of(s)), 0 }; // Zero-terminating + return ch; +} - string token; - 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]; +/// format_move() converts a Move to a string in coordinate notation +/// (g1f3, a7a8q, etc.). The only special case is castling moves, where we print +/// in the e1g1 notation in normal chess mode, and in e1h1 notation in chess960 +/// mode. Internally castling moves are always encoded as "king captures rook". - searchMoves[0] = MOVE_NONE; +string UCI::format_move(Move m, bool chess960) { - while (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 >> token) - searchMoves[numOfMoves++] = move_from_string(RootPosition, token); - - searchMoves[numOfMoves] = MOVE_NONE; - } - } + Square from = from_sq(m); + Square to = to_sq(m); - assert(RootPosition.is_ok()); + if (m == MOVE_NONE) + return "(none)"; - return think(RootPosition, infinite, ponder, RootPosition.side_to_move(), - time, inc, movesToGo, depth, nodes, moveTime, searchMoves); - } + if (m == MOVE_NULL) + return "0000"; - void perft(UCIInputParser& uip) { + if (type_of(m) == CASTLING && !chess960) + to = make_square(to > from ? FILE_G : FILE_C, rank_of(from)); - string token; - int depth, tm, n; - Position pos(RootPosition, RootPosition.thread()); + string move = format_square(from) + format_square(to); - if (!(uip >> depth)) - return; + if (type_of(m) == PROMOTION) + move += " pnbrqk"[promotion_type(m)]; + + return move; +} - tm = get_system_time(); - n = perft(pos, depth * OnePly); +/// to_move() takes a position and a string representing a move in +/// simple coordinate notation and returns an equivalent legal Move if any. - tm = get_system_time() - tm; - std::cout << "\nNodes " << n - << "\nTime (ms) " << tm - << "\nNodes/second " << (int)(n/(tm/1000.0)) << std::endl; - } +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 (MoveList it(pos); *it; ++it) + if (str == format_move(*it, pos.is_chess960())) + return *it; + + return MOVE_NONE; }