X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fuci.cpp;h=72e3d0bd0cd4600f5c1694c884ff769b1a1d6a66;hp=931891a0263cc6c32f7df193a8380a487e9aa905;hb=ffa75215cc06d105bc2b43ddb8ed5d4deccd8988;hpb=03ad183384d484990248cb22394a93926f421520 diff --git a/src/uci.cpp b/src/uci.cpp index 931891a0..72e3d0bd 100644 --- a/src/uci.cpp +++ b/src/uci.cpp @@ -28,6 +28,7 @@ #include "move.h" #include "position.h" #include "search.h" +#include "thread.h" #include "ucioption.h" using namespace std; @@ -35,84 +36,100 @@ 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"; // 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. - std::vector SetupState(200, StateInfo()); + // 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; + + void set_option(istringstream& up); + void set_position(Position& pos, istringstream& up); + void go(Position& pos, istringstream& up); + void perft(Position& pos, istringstream& up); +} - // UCIParser is a class for parsing UCI input. The class - // is actually a string stream built on a given input string. - typedef istringstream UCIParser; - void set_option(UCIParser& up); - void set_position(Position& pos, UCIParser& up); - bool go(Position& pos, UCIParser& up); - void perft(Position& pos, UCIParser& up); -} +/// 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. +void uci_loop() { -/// 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 pos(StarFEN, false, 0); // The root position + string cmd, token; + bool quit = false; -bool execute_uci_command(const string& cmd) { + while (!quit && getline(cin, cmd)) + { + istringstream is(cmd); - static Position pos(StartPositionFEN, false, 0); // The root position + is >> skipws >> token; - UCIParser up(cmd); - string token; + if (cmd == "quit" || cmd == "stop") + { + quit = (token == "quit"); + Search::Signals.stop = true; + Threads[0].wake_up(); // In case is waiting for stop or ponderhit + } - up >> skipws >> token; + 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 - if (token == "quit") - return false; + if (Search::Signals.stopOnPonderhit) + Search::Signals.stop = true; - if (token == "go") - return go(pos, up); + Threads[0].wake_up(); // In case is waiting for stop or ponderhit + } - if (token == "ucinewgame") - pos.from_fen(StartPositionFEN, false); + else if (token == "go") + go(pos, is); - else if (token == "isready") - cout << "readyok" << endl; + else if (token == "ucinewgame") + pos.from_fen(StarFEN, false); - else if (token == "position") - set_position(pos, up); + else if (token == "isready") + cout << "readyok" << endl; - else if (token == "setoption") - set_option(up); + else if (token == "position") + set_position(pos, is); - else if (token == "perft") - perft(pos, up); + else if (token == "setoption") + set_option(is); - else if (token == "d") - pos.print(); + else if (token == "perft") + perft(pos, is); - else if (token == "flip") - pos.flip(); + else if (token == "d") + pos.print(); - else if (token == "eval") - { - read_evaluation_uci_options(pos.side_to_move()); - cout << trace_evaluate(pos) << endl; - } + else if (token == "flip") + pos.flip_me(); - 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 == "eval") + { + read_evaluation_uci_options(pos.side_to_move()); + cout << trace_evaluate(pos) << 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; + else if (token == "key") + cout << "key: " << hex << pos.get_key() + << "\nmaterial key: " << pos.get_material_key() + << "\npawn key: " << pos.get_pawn_key() << endl; - return true; + 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; + } } @@ -123,34 +140,34 @@ namespace { // 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) { Move m; string token, fen; - up >> token; + is >> token; if (token == "startpos") { - pos.from_fen(StartPositionFEN, false); - up >> token; // Consume "moves" token if any + 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; - - SetupState.clear(); + pos.from_fen(fen, Options["UCI_Chess960"].value()); // Parse move list (if any) - while (up >> token && (m = move_from_uci(pos, token)) != MOVE_NONE) + while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE) { - SetupState.push_back(StateInfo()); - pos.do_move(m, SetupState.back()); + pos.do_move(m, *SetupState); + + // Increment pointer to StateRingBuf circular buffer + if (++SetupState - StateRingBuf >= 102) + SetupState = StateRingBuf; } } @@ -159,18 +176,18 @@ namespace { // command. The function updates the corresponding UCI option ("name") // to the given value ("value"). - void set_option(UCIParser& up) { + void set_option(istringstream& is) { string token, name, value; - up >> token; // Consume "name" token + is >> token; // Consume "name" token // Read option name (can contain spaces) - while (up >> token && token != "value") + while (is >> token && token != "value") name += string(" ", !name.empty()) + token; // Read option value (can contain spaces) - while (up >> token) + while (is >> token) value += string(" ", !value.empty()) + token; if (Options.find(name) != Options.end()) @@ -185,45 +202,47 @@ namespace { // 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; - SearchLimits limits; - std::vector searchMoves; int time[] = { 0, 0 }, inc[] = { 0, 0 }; - while (up >> token) + memset(&Search::Limits, 0, sizeof(Search::Limits)); + Search::RootMoves.clear(); + Search::RootPosition = &pos; + + while (is >> token) { if (token == "infinite") - limits.infinite = true; + Search::Limits.infinite = true; else if (token == "ponder") - limits.ponder = true; + Search::Limits.ponder = true; else if (token == "wtime") - up >> time[WHITE]; + is >> time[WHITE]; else if (token == "btime") - up >> time[BLACK]; + is >> time[BLACK]; else if (token == "winc") - up >> inc[WHITE]; + is >> inc[WHITE]; else if (token == "binc") - up >> inc[BLACK]; + is >> inc[BLACK]; else if (token == "movestogo") - up >> limits.movesToGo; + is >> Search::Limits.movesToGo; else if (token == "depth") - up >> limits.maxDepth; + is >> Search::Limits.maxDepth; else if (token == "nodes") - up >> limits.maxNodes; + is >> Search::Limits.maxNodes; else if (token == "movetime") - up >> limits.maxTime; + is >> Search::Limits.maxTime; else if (token == "searchmoves") - while (up >> token) - searchMoves.push_back(move_from_uci(pos, token)); + while (is >> token) + Search::RootMoves.push_back(move_from_uci(pos, token)); } - searchMoves.push_back(MOVE_NONE); - limits.time = time[pos.side_to_move()]; - limits.increment = inc[pos.side_to_move()]; + 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, limits, &searchMoves[0]); + Threads.start_thinking(); } @@ -231,17 +250,17 @@ namespace { // The function calls perft() passing the required search depth // then prints counted leaf nodes and elapsed time. - void perft(Position& pos, UCIParser& up) { + void perft(Position& pos, istringstream& is) { int depth, time; int64_t n; - if (!(up >> depth)) + if (!(is >> depth)) return; time = get_system_time(); - n = perft(pos, depth * ONE_PLY); + n = Search::perft(pos, depth * ONE_PLY); time = get_system_time() - time;