X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=72e3d0bd0cd4600f5c1694c884ff769b1a1d6a66;hp=d15b086677204ff03b40027845766320447dad1f;hb=ffa75215cc06d105bc2b43ddb8ed5d4deccd8988;hpb=caa02b0e43dbce0c723bc6499aab811ca3e5408e diff --git a/src/uci.cpp b/src/uci.cpp index d15b0866..72e3d0bd 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -17,253 +17,255 @@ along with this program. If not, see . */ - -//// -//// Includes -//// - #include -#include #include #include #include +#include #include "evaluate.h" #include "misc.h" #include "move.h" -#include "movegen.h" #include "position.h" #include "search.h" +#include "thread.h" #include "ucioption.h" using namespace std; - namespace { // FEN string for the initial position - const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"; + const char* StarFEN = "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); + 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. +/// Wait for a command from the user, parse this text string as an UCI command, +/// and calls 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. -bool execute_uci_command(const string& cmd) { +void uci_loop() { - static Position pos(StartPositionFEN, false, 0); // The root position - UCIParser up(cmd); - Value dummy; - string token; + Position pos(StarFEN, false, 0); // The root position + string cmd, token; + bool quit = false; - up >> token; // operator>>() skips any whitespace + while (!quit && getline(cin, cmd)) + { + istringstream is(cmd); - if (token == "quit") - return false; + is >> skipws >> token; - else if (token == "go") - return go(pos, up); + if (cmd == "quit" || cmd == "stop") + { + quit = (token == "quit"); + Search::Signals.stop = true; + Threads[0].wake_up(); // In case is waiting for stop or ponderhit + } - else if (token == "uci") - cout << "id name " << engine_name() - << "\nid author " << engine_author() - << "\n" << options_to_uci() - << "\nuciok" << endl; + else if (cmd == "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; // FIXME racing - else if (token == "ucinewgame") - pos.from_fen(StartPositionFEN, false); + if (Search::Signals.stopOnPonderhit) + Search::Signals.stop = true; - else if (token == "isready") - cout << "readyok" << endl; + Threads[0].wake_up(); // In case is waiting for stop or ponderhit + } - else if (token == "position") - set_position(pos, up); + else if (token == "go") + go(pos, is); - else if (token == "setoption") - set_option(up); + else if (token == "ucinewgame") + pos.from_fen(StarFEN, false); - else if (token == "d") - pos.print(); + else if (token == "isready") + cout << "readyok" << endl; - else if (token == "eval") - cout << "Incremental mg: " << mg_value(pos.value()) - << "\nIncremental eg: " << eg_value(pos.value()) - << "\nFull eval: " << evaluate(pos, dummy) << endl; + else if (token == "position") + set_position(pos, is); - 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 == "setoption") + set_option(is); - else if (token == "perft") - perft(pos, up); + else if (token == "perft") + perft(pos, is); - else if (token == "flip") - { - Position p(pos, pos.thread()); - pos.flipped_copy(p); - } - else - cout << "Unknown command: " << cmd << endl; + else if (token == "d") + pos.print(); - return true; -} + else if (token == "flip") + pos.flip_me(); + + else if (token == "eval") + { + read_evaluation_uci_options(pos.side_to_move()); + cout << trace_evaluate(pos) << 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; + } +} -//// -//// Local functions -//// 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 fen, token; + Move m; + string token, fen; - up >> token; // operator>>() skips any whitespace + is >> token; if (token == "startpos") { - pos.from_fen(StartPositionFEN, false); - up >> token; // Consume "moves" token + fen = StarFEN; + is >> token; // Consume "moves" token if any } else if (token == "fen") - { - while (up >> token && token != "moves") + while (is >> token && token != "moves") fen += token + " "; + else + return; - pos.from_fen(fen, Options["UCI_Chess960"].value()); - } - else return; + pos.from_fen(fen, Options["UCI_Chess960"].value()); // Parse move list (if any) - while (up >> token) - pos.do_setup_move(move_from_uci(pos, token)); - } + while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE) + { + pos.do_move(m, *SetupState); + // Increment pointer to StateRingBuf circular buffer + if (++SetupState - StateRingBuf >= 102) + SetupState = StateRingBuf; + } + } - // 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). - void set_option(UCIParser& up) { + // 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 value = "true"; // UCI buttons don't have a "value" field - string token, name; + void set_option(istringstream& is) { - up >> token; // Consume "name" token - up >> name; // Read option name + string token, name, value; - // Handle names with included spaces - while (up >> token && token != "value") - name += " " + token; + is >> token; // Consume "name" token - up >> value; // Read option value + // Read option name (can contain spaces) + while (is >> token && token != "value") + name += string(" ", !name.empty()) + token; - // Handle values with included spaces - while (up >> token) - value += " " + token; + // Read option value (can contain spaces) + while (is >> token) + value += string(" ", !value.empty()) + token; if (Options.find(name) != Options.end()) - Options[name].set_value(value); + Options[name].set_value(value.empty() ? "true" : value); // UCI buttons don't have "value" else cout << "No such option: " << name << endl; } - // 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 calls think(). Returns false if a quit command + // is received while thinking, true otherwise. - bool go(Position& pos, UCIParser& up) { + void go(Position& pos, istringstream& is) { string token; - Move searchMoves[MOVES_MAX]; - int movesToGo, depth, nodes, moveTime, numOfMoves; - bool infinite, ponder; - int time[2] = {0, 0}, inc[2] = {0, 0}; + int time[] = { 0, 0 }, inc[] = { 0, 0 }; - searchMoves[0] = MOVE_NONE; - infinite = ponder = false; - movesToGo = depth = nodes = moveTime = numOfMoves = 0; + memset(&Search::Limits, 0, sizeof(Search::Limits)); + Search::RootMoves.clear(); + Search::RootPosition = &pos; - while (up >> token) + while (is >> token) { if (token == "infinite") - infinite = true; + Search::Limits.infinite = true; else if (token == "ponder") - ponder = true; + Search::Limits.ponder = true; else if (token == "wtime") - up >> time[0]; + is >> time[WHITE]; else if (token == "btime") - up >> time[1]; + is >> time[BLACK]; else if (token == "winc") - up >> inc[0]; + is >> inc[WHITE]; else if (token == "binc") - up >> inc[1]; + is >> inc[BLACK]; else if (token == "movestogo") - up >> movesToGo; + is >> Search::Limits.movesToGo; else if (token == "depth") - up >> depth; + is >> Search::Limits.maxDepth; else if (token == "nodes") - up >> nodes; + is >> Search::Limits.maxNodes; else if (token == "movetime") - up >> moveTime; + is >> Search::Limits.maxTime; else if (token == "searchmoves") - { - while (up >> token) - searchMoves[numOfMoves++] = move_from_uci(pos, token); - - searchMoves[numOfMoves] = MOVE_NONE; - } + while (is >> token) + Search::RootMoves.push_back(move_from_uci(pos, token)); } - assert(pos.is_ok()); + Search::RootMoves.push_back(MOVE_NONE); + Search::Limits.time = time[pos.side_to_move()]; + Search::Limits.increment = inc[pos.side_to_move()]; - return think(pos, infinite, ponder, time, inc, movesToGo, - depth, nodes, moveTime, searchMoves); + Threads.start_thinking(); } - void perft(Position& pos, UCIParser& up) { - int depth, tm; + // 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. + + void perft(Position& pos, istringstream& is) { + + int depth, time; int64_t n; - if (!(up >> depth)) + if (!(is >> depth)) return; - tm = get_system_time(); + time = get_system_time(); + + n = Search::perft(pos, depth * ONE_PLY); - n = perft(pos, depth * ONE_PLY); + time = get_system_time() - time; - tm = get_system_time() - tm; std::cout << "\nNodes " << n - << "\nTime (ms) " << tm - << "\nNodes/second " << int(n / (tm / 1000.0)) << std::endl; + << "\nTime (ms) " << time + << "\nNodes/second " << int(n / (time / 1000.0)) << std::endl; } }