X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=ae34043831cb19f39fa96fd7c9f677f7d68733a0;hp=48459757dda217aaf117fc5fbc60211722555488;hb=0f81f97bb6e7b3a8f8489d468cfc045e9b0a1849;hpb=72af519e7ff93ca3524f82db1d429002d2d9ea72 diff --git a/src/uci.cpp b/src/uci.cpp index 48459757..ae340438 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 Marco Costalba + Copyright (C) 2008-2010 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 @@ -23,11 +23,11 @@ //// #include +#include #include #include #include -#include "book.h" #include "evaluate.h" #include "misc.h" #include "move.h" @@ -35,50 +35,96 @@ #include "position.h" #include "san.h" #include "search.h" -#include "uci.h" #include "ucioption.h" +using namespace std; -//// -//// Local definitions: -//// namespace { - // UCIInputParser is a class for parsing UCI input. The class - // is actually a string stream built on a given input string. + // FEN string for the initial position + const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; - typedef std::istringstream UCIInputParser; - - // 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; + // UCIParser is a class for parsing UCI input. The class + // is actually a string stream built on a given input string. + typedef istringstream UCIParser; // Local functions - void get_command(); - void handle_command(const std::string &command); - void set_option(UCIInputParser &uip); - void set_position(UCIInputParser &uip); - void go(UCIInputParser &uip); + 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); } -//// -//// Functions -//// +/// 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; + + if (!(up >> token)) // operator>>() skips any whitespace + return true; + + if (token == "quit") + return false; + + if (token == "go") + return go(pos, up); + + 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") + pos.from_fen(StartPositionFEN, false); + + else if (token == "isready") + cout << "readyok" << endl; + + else if (token == "position") + set_position(pos, up); + + else if (token == "setoption") + set_option(up); -/// 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. + // The remaining commands are for debugging purposes only + else if (token == "d") + pos.print(); -void uci_main_loop() { + 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 == "perft") + perft(pos, up); - RootPosition.from_fen(StartPosition); + else + cout << "Unknown command: " << cmd << endl; - while (1) - get_command(); + return true; } @@ -88,246 +134,239 @@ void uci_main_loop() { namespace { - // get_command() waits for a command from the user, and passes - // this command to handle_command. get_command also intercepts - // EOF from stdin, by translating EOF to the "quit" command. This - // ensures that Stockfish exits gracefully if the GUI dies - // unexpectedly. + // 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. - void get_command() { + Move parse_uci_move(const Position& pos, const std::string& str) { - std::string command; + Square from, to; + Piece piece; + Color us = pos.side_to_move(); - if (!std::getline(std::cin, command)) - command = "quit"; - - handle_command(command); - } + if (str.length() < 4) + return MOVE_NONE; + // 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])); - // 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. + // Find the moving piece + piece = pos.piece_on(from); - void handle_command(const std::string &command) { - - UCIInputParser uip(command); - std::string token; - - uip >> token; // operator >> skips any whitespace - - if (token == "quit") - { - OpeningBook.close(); - stop_threads(); - quit_eval(); - exit(0); - } - else if (token == "uci") - { - std::cout << "id name " << engine_name() << std::endl - << "id author Tord Romstad, Marco Costalba" - << std::endl; - print_uci_options(); - std::cout << "uciok" << std::endl; - } - else if (token == "ucinewgame") - { - TT.clear(); - Position::init_piece_square_tables(); - RootPosition.from_fen(StartPosition); - } - else if (token == "isready") - std::cout << "readyok" << std::endl; - else if (token == "position") - set_position(uip); - else if (token == "setoption") - set_option(uip); - else if (token == "go") - go(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.flipped_copy(p); - } - else if (token == "eval") - { - EvalInfo ei; - std::cout << "Incremental mg: " << RootPosition.mg_value() - << std::endl; - std::cout << "Incremental eg: " << RootPosition.eg_value() - << std::endl; - std::cout << "Full eval: " - << evaluate(RootPosition, ei, 0) - << std::endl; - } - else if (token == "key") + // 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)) { - std::cout << "key: " << std::hex << RootPosition.get_key() - << " material key: " << RootPosition.get_material_key() - << " pawn key: " << RootPosition.get_pawn_key() - << std::endl; + 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 + + // 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); + + // 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)) { - std::cout << "Unknown command: " << command << std::endl; - while (!uip.eof()) + if (pos.piece_on(to) == piece_of_color_and_type(us, ROOK)) + return make_castle_move(from, to); + + if (square_distance(from, to) > 1) { - uip >> token; - std::cout << token << std::endl; + // 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); + } // set_position() is called when Stockfish receives the "position" UCI - // command. The input parameter is a UCIInputParser. It is assumed + // 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). - void set_position(UCIInputParser &uip) { + void set_position(Position& pos, UCIParser& up) { - std::string token; + string token; - uip >> token; // operator >> skips any whitespace + if (!(up >> token) || (token != "startpos" && token != "fen")) + return; if (token == "startpos") - RootPosition.from_fen(StartPosition); - else if (token == "fen") { - std::string fen; - while (token != "moves" && !uip.eof()) + pos.from_fen(StartPositionFEN, false); + if (!(up >> token)) + return; + } + else // fen + { + string fen; + while (up >> token && token != "moves") { - uip >> token; - fen += token; - fen += ' '; + fen += token; + fen += ' '; } - RootPosition.from_fen(fen); + pos.from_fen(fen, Options["UCI_Chess960"].value()); } - if (!uip.eof()) + if (token != "moves") + return; + + // Parse optional move list + Move move; + StateInfo st; + while (up >> token) { - if (token != "moves") - uip >> token; - if (token == "moves") - { - Move move; - StateInfo st; - while (!uip.eof()) - { - uip >> token; - move = move_from_string(RootPosition, token); - RootPosition.do_move(move, st); - if (RootPosition.rule_50_counter() == 0) - RootPosition.reset_game_ply(); - } - // Our StateInfo st is about going out of scope, - // so save its content before they disappear. - RootPosition.setStartState(st); - } + move = parse_uci_move(pos, token); + pos.do_setup_move(move, st); } + // 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 UCIInputParser. It is assumed + // 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). - void set_option(UCIInputParser &uip) { + void set_option(UCIParser& up) { + + string token, name, value; + + if (!(up >> token) || token != "name") // operator>>() skips any whitespace + return; + + if (!(up >> name)) + return; - std::string token, name; + // Handle names with included spaces + while (up >> token && token != "value") + name += (" " + token); - uip >> token; - if (token == "name") + if (Options.find(name) == Options.end()) { - uip >> name; - uip >> token; - while (!uip.eof() && token != "value") - { - name += (" " + token); - uip >> token; - } - if (token == "value") - { - std::getline(uip, token); // reads until end of line - set_option_value(name, token); - } else - push_button(name); + 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 UCIInputParser. It is assumed that this + // 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 + // 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. + // parameters. Returns false if a quit command is received while + // thinking, returns true otherwise. - void go(UCIInputParser &uip) { + bool go(Position& pos, UCIParser& up) { - std::string token; + 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]; + Move searchMoves[MOVES_MAX]; searchMoves[0] = MOVE_NONE; - while (!uip.eof()) + while (up >> token) { - uip >> token; - if (token == "infinite") infinite = true; else if (token == "ponder") ponder = true; else if (token == "wtime") - uip >> time[0]; + up >> time[0]; else if (token == "btime") - uip >> time[1]; + up >> time[1]; else if (token == "winc") - uip >> inc[0]; + up >> inc[0]; else if (token == "binc") - uip >> inc[1]; + up >> inc[1]; else if (token == "movestogo") - uip >> movesToGo; + up >> movesToGo; else if (token == "depth") - uip >> depth; + up >> depth; else if (token == "nodes") - uip >> nodes; + up >> nodes; else if (token == "movetime") - uip >> moveTime; + up >> moveTime; else if (token == "searchmoves") { int numOfMoves = 0; - while (!uip.eof()) - { - uip >> token; - searchMoves[numOfMoves++] = move_from_string(RootPosition, token); - } + while (up >> token) + searchMoves[numOfMoves++] = parse_uci_move(pos, token); + searchMoves[numOfMoves] = MOVE_NONE; } } - if (moveTime) - infinite = true; // HACK + assert(pos.is_ok()); + + return think(pos, infinite, ponder, time, inc, movesToGo, + depth, nodes, moveTime, searchMoves); + } + + void perft(Position& pos, UCIParser& up) { + + int depth, tm; + int64_t n; + + if (!(up >> depth)) + return; + + tm = get_system_time(); - assert(RootPosition.is_ok()); + n = perft(pos, depth * ONE_PLY); - think(RootPosition, infinite, ponder, RootPosition.side_to_move(), time, - inc, movesToGo, depth, nodes, moveTime, searchMoves); + tm = get_system_time() - tm; + std::cout << "\nNodes " << n + << "\nTime (ms) " << tm + << "\nNodes/second " << int(n / (tm / 1000.0)) << std::endl; } }