X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=819e02bc96fec698f37a71013453f7230b2939c1;hp=2dacd1c2f37b3b9a18a66c1d340d041342f4bb31;hb=9ba391c5cb1c138bb9828bc8d8be296ebddf1d72;hpb=e656ddcf18c887cd1f396dc2e433c001cd0bda11 diff --git a/src/uci.cpp b/src/uci.cpp index 2dacd1c2..819e02bc 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 @@ -17,231 +17,274 @@ along with this program. If not, see . */ -#include +#include #include #include #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 "tt.h" +#include "uci.h" using namespace std; -namespace { +extern void benchmark(const Position& pos, istream& is); - // 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); -} + // 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; -/// 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. + // 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"). -bool execute_uci_command(const string& cmd) { + void position(Position& pos, istringstream& is) { - 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; + pos.set(fen, Options["UCI_Chess960"], Threads.main()); + SetupStates = Search::StateStackPtr(new std::stack()); - if (token == "go") - return go(pos, up); + // 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()); + } + } - 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 += string(" ", !name.empty()) + token; - else if (token == "flip") - pos.flip(); + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", !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; - - return true; -} - - -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"). - void set_position(Position& pos, UCIParser& up) { + // 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. - string token, fen; + void go(const Position& pos, istringstream& is) { - up >> token; // operator>>() skips any whitespace + Search::LimitsType limits; + string token; - if (token == "startpos") - { - pos.from_fen(StartPositionFEN, false); - up >> token; // Consume "moves" token if any - } - else if (token == "fen") + while (is >> token) { - while (up >> token && token != "moves") - fen += token + " "; - - pos.from_fen(fen, Options["UCI_Chess960"].value()); + 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 return; - // Parse move list (if any) - while (up >> token) - pos.do_setup_move(move_from_uci(pos, token)); + Threads.start_thinking(pos, limits, SetupStates); } +} // namespace + + +/// 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(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 + cmd = "quit"; + + istringstream is(cmd); + + 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.pretty() << 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 +} + + +/// 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. - // set_option() is called when engine receives the "setoption" UCI - // command. The function updates the corresponding UCI option ("name") - // to the given value ("value"). +string UCI::format_value(Value v, Value alpha, Value beta) { - void set_option(UCIParser& up) { + stringstream ss; - string token, name; - string value = "true"; // UCI buttons don't have a "value" field + if (abs(v) < VALUE_MATE_IN_MAX_PLY) + ss << "cp " << v * 100 / PawnValueEg; + else + ss << "mate " << (v > 0 ? VALUE_MATE - v + 1 : -VALUE_MATE - v) / 2; - up >> token; // Consume "name" token - up >> name; // Read option name + ss << (v >= beta ? " lowerbound" : v <= alpha ? " upperbound" : ""); - // Handle names with included spaces - while (up >> token && token != "value") - name += " " + token; + return ss.str(); +} - up >> value; // Read option value - // Handle values with included spaces - while (up >> token) - value += " " + token; +/// format_square() converts a Square to a string (g1, a7, etc.) - if (Options.find(name) != Options.end()) - Options[name].set_value(value); - else - cout << "No such option: " << name << endl; - } +std::string UCI::format_square(Square s) { + char ch[] = { 'a' + file_of(s), '1' + rank_of(s), 0 }; // Zero-terminating + return ch; +} - // 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. - bool go(Position& pos, UCIParser& up) { +/// 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". - string token; - SearchLimits limits; - Move searchMoves[MAX_MOVES], *cur = searchMoves; - int time[] = { 0, 0 }, inc[] = { 0, 0 }; +string UCI::format_move(Move m, bool chess960) { - 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); - } + Square from = from_sq(m); + Square to = to_sq(m); - *cur = MOVE_NONE; - limits.time = time[pos.side_to_move()]; - limits.increment = inc[pos.side_to_move()]; + if (m == MOVE_NONE) + return "(none)"; - assert(pos.is_ok()); + if (m == MOVE_NULL) + return "0000"; - return think(pos, limits, searchMoves); - } + if (type_of(m) == CASTLING && !chess960) + to = make_square(to > from ? FILE_G : FILE_C, rank_of(from)); + string move = format_square(from) + format_square(to); - // perft() is called when engine receives the "perft" command. - // The function calls perft() passing the required search depth - // then prints counted leaf nodes and elapsed time. + if (type_of(m) == PROMOTION) + move += " pnbrqk"[promotion_type(m)]; - void perft(Position& pos, UCIParser& up) { + return move; +} - int depth, time; - int64_t n; - if (!(up >> depth)) - return; +/// to_move() takes a position and a string representing a move in +/// simple coordinate notation and returns an equivalent legal Move if any. - time = get_system_time(); +Move UCI::to_move(const Position& pos, string& str) { - n = perft(pos, depth * ONE_PLY); + if (str.length() == 5) // Junior could send promotion piece in uppercase + str[4] = char(tolower(str[4])); - time = get_system_time() - time; + for (MoveList it(pos); *it; ++it) + if (str == format_move(*it, pos.is_chess960())) + return *it; - std::cout << "\nNodes " << n - << "\nTime (ms) " << time - << "\nNodes/second " << int(n / (time / 1000.0)) << std::endl; - } + return MOVE_NONE; }