X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=c6da2fc4851acee54e5b60f140cb054d3066e5f5;hp=ae34043831cb19f39fa96fd7c9f677f7d68733a0;hb=673bc5526fa3d352f823ad144fb521b5dc98f45c;hpb=1e7aaed8bc4247a742d515811f0e484ff40309b8 diff --git a/src/uci.cpp b/src/uci.cpp index ae340438..c6da2fc4 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) 2008-2012 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 @@ -17,356 +17,254 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - -#include -#include #include #include #include #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 "ucioption.h" using namespace std; +extern void benchmark(istringstream& is); namespace { - // FEN string for the initial position - const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; + // FEN string of the initial position, normal chess + const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - // UCIParser is a class for parsing UCI input. The class - // is actually a string stream built on a given input string. - typedef istringstream UCIParser; + // 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; - // Local functions - void set_option(UCIParser& up); - void set_position(Position& pos, UCIParser& up); - bool go(Position& pos, UCIParser& up); - void perft(Position& pos, UCIParser& up); - Move parse_uci_move(const Position& pos, const std::string &str); + void set_option(istringstream& up); + void set_position(Position& pos, istringstream& up); + void go(Position& pos, istringstream& up); + void perft(Position& pos, istringstream& up); } -/// 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. - -bool execute_uci_command(const string& cmd) { - - static Position pos(StartPositionFEN, false, 0); // The root position - UCIParser up(cmd); - string token; +/// 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. - if (!(up >> token)) // operator>>() skips any whitespace - return true; +void uci_loop(const string& args) { - if (token == "quit") - return false; + Position pos(StartFEN, false, Threads.main_thread()); // The root position + string cmd, token; - if (token == "go") - return go(pos, up); - - if (token == "uci") + while (token != "quit") { - cout << "id name " << engine_name() - << "\nid author Tord Romstad, Marco Costalba, Joona Kiiski\n"; - print_uci_options(); - cout << "uciok" << endl; - } - else if (token == "ucinewgame") - pos.from_fen(StartPositionFEN, false); + if (!args.empty()) + cmd = args; - else if (token == "isready") - cout << "readyok" << endl; + else if (!getline(cin, cmd)) // Block here waiting for input + cmd = "quit"; - else if (token == "position") - set_position(pos, up); + istringstream is(cmd); - else if (token == "setoption") - set_option(up); + is >> skipws >> token; - // The remaining commands are for debugging purposes only - else if (token == "d") - pos.print(); + if (token == "quit" || token == "stop") + { + Search::Signals.stop = true; + Threads.wait_for_search_finished(); // Cannot quit while threads are running + } - else if (token == "flip") - { - Position p(pos, pos.thread()); - pos.flipped_copy(p); - } - else if (token == "eval") - { - Value evalMargin; - cout << "Incremental mg: " << mg_value(pos.value()) - << "\nIncremental eg: " << eg_value(pos.value()) - << "\nFull eval: " << evaluate(pos, evalMargin) << 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 == "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; - else if (token == "perft") - perft(pos, up); + if (Search::Signals.stopOnPonderhit) + { + Search::Signals.stop = true; + Threads.wait_for_search_finished(); // Wake up if is sleeping + } + } - else - cout << "Unknown command: " << cmd << endl; + else if (token == "go") + go(pos, is); - return true; -} + else if (token == "ucinewgame") + { /* Avoid returning "Unknown command" */ } + else if (token == "isready") + cout << "readyok" << endl; -//// -//// Local functions -//// + else if (token == "position") + set_position(pos, is); -namespace { + else if (token == "setoption") + set_option(is); - // parse_uci_move() takes a position and a string as input, and attempts to - // convert the string to a move, using simple coordinate notation (g1f3, - // a7a8q, etc.). In order to correctly parse en passant captures and castling - // moves, we need the position. This function is not robust, and expects that - // the input move is legal and correctly formatted. + else if (token == "perft") + perft(pos, is); - Move parse_uci_move(const Position& pos, const std::string& str) { + else if (token == "d") + pos.print(); - Square from, to; - Piece piece; - Color us = pos.side_to_move(); + else if (token == "flip") + pos.flip(); - if (str.length() < 4) - return MOVE_NONE; + else if (token == "eval") + cout << Eval::trace(pos) << endl; - // Read the from and to squares - from = make_square(file_from_char(str[0]), rank_from_char(str[1])); - to = make_square(file_from_char(str[2]), rank_from_char(str[3])); + else if (token == "bench") + benchmark(is); - // Find the moving piece - piece = pos.piece_on(from); + else if (token == "key") + cout << "key: " << hex << pos.key() + << "\nmaterial key: " << pos.material_key() + << "\npawn key: " << pos.pawn_key() << endl; - // If the string has more than 4 characters, try to interpret the 5th - // character as a promotion. - if (str.length() > 4 && piece == piece_of_color_and_type(us, PAWN)) - { - switch (tolower(str[4])) { - case 'n': - return make_promotion_move(from, to, KNIGHT); - case 'b': - return make_promotion_move(from, to, BISHOP); - case 'r': - return make_promotion_move(from, to, ROOK); - case 'q': - return make_promotion_move(from, to, QUEEN); - } - } + else if (token == "uci") + cout << "id name " << engine_info(true) + << "\n" << Options + << "\nuciok" << endl; + else + cout << "Unknown command: " << cmd << endl; - // En passant move? We assume that a pawn move is an en passant move - // if the destination square is epSquare. - if (to == pos.ep_square() && piece == piece_of_color_and_type(us, PAWN)) - return make_ep_move(from, to); + if (!args.empty()) // Command line arguments have one-shot behaviour + { + Threads.wait_for_search_finished(); + break; + } + } +} - // Is this a castling move? A king move is assumed to be a castling move - // if the destination square is occupied by a friendly rook, or if the - // distance between the source and destination squares is more than 1. - if (piece == piece_of_color_and_type(us, KING)) - { - if (pos.piece_on(to) == piece_of_color_and_type(us, ROOK)) - return make_castle_move(from, to); - - if (square_distance(from, to) > 1) - { - // This is a castling move, but we have to translate it to the - // internal "king captures rook" representation. - SquareDelta delta = (to > from ? DELTA_E : DELTA_W); - Square s = from; - - do s += delta; - while ( pos.piece_on(s) != piece_of_color_and_type(us, ROOK) - && relative_rank(us, s) == RANK_1); - - return relative_rank(us, s) == RANK_1 ? make_castle_move(from, s) : MOVE_NONE; - } - } - return make_move(from, to); - } +namespace { - // set_position() is called when Stockfish receives the "position" UCI - // command. The input parameter is a UCIParser. 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). + // 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) { + void set_position(Position& pos, istringstream& is) { - string token; + Move m; + string token, fen; - if (!(up >> token) || (token != "startpos" && token != "fen")) - return; + is >> token; if (token == "startpos") { - pos.from_fen(StartPositionFEN, false); - if (!(up >> token)) - return; + fen = StartFEN; + is >> token; // Consume "moves" token if any } - else // fen - { - string fen; - while (up >> token && token != "moves") - { - fen += token; - fen += ' '; - } - pos.from_fen(fen, Options["UCI_Chess960"].value()); - } - - if (token != "moves") + else if (token == "fen") + while (is >> token && token != "moves") + fen += token + " "; + else return; - // Parse optional move list - Move move; - StateInfo st; - while (up >> token) + pos.from_fen(fen, Options["UCI_Chess960"], Threads.main_thread()); + + // Parse move list (if any) + while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE) { - move = parse_uci_move(pos, token); - pos.do_setup_move(move, st); + pos.do_move(m, *SetupState); + + // Increment pointer to StateRingBuf circular buffer + if (++SetupState - StateRingBuf >= 102) + SetupState = StateRingBuf; } - // Our StateInfo st is about going out of scope so copy - // its content inside pos before it disappears. - pos.detach(); } - // set_option() is called when Stockfish receives the "setoption" UCI - // command. The input parameter is a UCIParser. 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). + // set_option() is called when engine receives the "setoption" UCI command. The + // function updates the UCI option ("name") to the given value ("value"). - void set_option(UCIParser& up) { + void set_option(istringstream& is) { string token, name, value; - if (!(up >> token) || token != "name") // operator>>() skips any whitespace - return; + is >> token; // Consume "name" token - if (!(up >> name)) - return; + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += string(" ", !name.empty()) + token; - // Handle names with included spaces - while (up >> token && token != "value") - name += (" " + token); + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", !value.empty()) + token; - if (Options.find(name) == Options.end()) - { + if (Options.count(name)) + Options[name] = value; + else cout << "No such option: " << name << endl; - return; - } - - // Is a button ? - if (token != "value") - { - Options[name].set_value("true"); - return; - } - - if (!(up >> value)) - return; - - // Handle values with included spaces - while (up >> token) - value += (" " + token); - - Options[name].set_value(value); } - // go() is called when Stockfish receives the "go" UCI command. The - // input parameter is a UCIParser. 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. + // 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 search. - bool go(Position& pos, UCIParser& up) { + void go(Position& pos, istringstream& is) { + Search::LimitsType limits; + vector searchMoves; 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[MOVES_MAX]; - - searchMoves[0] = MOVE_NONE; - - while (up >> token) + while (is >> token) { - if (token == "infinite") - infinite = true; - else if (token == "ponder") - ponder = true; - else if (token == "wtime") - up >> time[0]; + if (token == "wtime") + is >> limits.time[WHITE]; else if (token == "btime") - up >> time[1]; + is >> limits.time[BLACK]; else if (token == "winc") - up >> inc[0]; + is >> limits.inc[WHITE]; else if (token == "binc") - up >> inc[1]; + is >> limits.inc[BLACK]; else if (token == "movestogo") - up >> movesToGo; + is >> limits.movestogo; else if (token == "depth") - up >> depth; + is >> limits.depth; else if (token == "nodes") - up >> nodes; + is >> limits.nodes; else if (token == "movetime") - up >> moveTime; + is >> limits.movetime; + else if (token == "infinite") + limits.infinite = true; + else if (token == "ponder") + limits.ponder = true; else if (token == "searchmoves") - { - int numOfMoves = 0; - while (up >> token) - searchMoves[numOfMoves++] = parse_uci_move(pos, token); - - searchMoves[numOfMoves] = MOVE_NONE; - } + while (is >> token) + searchMoves.push_back(move_from_uci(pos, token)); } - assert(pos.is_ok()); - - return think(pos, infinite, ponder, time, inc, movesToGo, - depth, nodes, moveTime, searchMoves); + Threads.start_searching(pos, limits, searchMoves); } - void perft(Position& pos, UCIParser& up) { - int depth, tm; - int64_t n; + // 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. - if (!(up >> depth)) + void perft(Position& pos, istringstream& is) { + + int depth; + + if (!(is >> depth)) return; - tm = get_system_time(); + Time time = Time::current_time(); + + int64_t n = Search::perft(pos, depth * ONE_PLY); - n = perft(pos, depth * ONE_PLY); + int e = time.elapsed(); - tm = get_system_time() - tm; - std::cout << "\nNodes " << n - << "\nTime (ms) " << tm - << "\nNodes/second " << int(n / (tm / 1000.0)) << std::endl; + cout << "\nNodes " << n + << "\nTime (ms) " << e + << "\nNodes/second " << int(n / (e / 1000.0)) << endl; } }