/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2013 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
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <deque>
+#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>
// 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(istringstream& up);
- void set_position(Position& pos, istringstream& up);
- void go(Position& pos, istringstream& up);
+ // Keep track of position keys along the setup moves (from start position to the
+ // position just before to start searching). Needed by repetition draw detection.
+ Search::StateStackPtr SetupStates;
+
+ void setoption(istringstream& up);
+ void position(Position& pos, istringstream& up);
+ void go(const Position& pos, istringstream& up);
}
void UCI::loop(const string& args) {
- Position pos(StartFEN, false, Threads.main_thread()); // The root position
- string cmd, token;
-
- while (token != "quit")
- {
- if (!args.empty())
- cmd = args;
+ Position pos(StartFEN, false, Threads.main()); // The root position
+ string token, cmd = args;
- else if (!getline(cin, cmd)) // Block here waiting for input
+ do {
+ if (args.empty() && !getline(cin, cmd)) // Block here waiting for input
cmd = "quit";
istringstream is(cmd);
is >> skipws >> token;
- if (token == "quit" || token == "stop")
- {
- Search::Signals.stop = true;
- Threads.wait_for_search_finished(); // Cannot quit while threads are running
- }
-
- else if (token == "ponderhit")
+ if (token == "quit" || token == "stop" || 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;
-
- if (Search::Signals.stopOnPonderhit)
+ // 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
+ // switching from pondering to normal search.
+ if (token != "ponderhit" || Search::Signals.stopOnPonderhit)
{
Search::Signals.stop = true;
- Threads.main_thread()->wake_up(); // Could be sleeping
+ Threads.main()->notify_one(); // Could be sleeping
}
+ else
+ Search::Limits.ponder = false;
}
-
- else if (token == "go")
- go(pos, is);
-
- else if (token == "ucinewgame")
- TT.clear();
-
- else if (token == "isready")
- cout << "readyok" << endl;
-
- else if (token == "position")
- set_position(pos, is);
-
- else if (token == "setoption")
- set_option(is);
-
- else if (token == "d")
- pos.print();
-
- else if (token == "flip")
- pos.flip();
-
- else if (token == "eval")
- cout << Eval::trace(pos) << endl;
-
- else if (token == "bench")
- benchmark(pos, is);
-
- else if (token == "key")
- cout << "key: " << hex << pos.key()
- << "\nmaterial key: " << pos.material_key()
- << "\npawn key: " << pos.pawn_key() << endl;
-
- else if (token == "uci")
- cout << "id name " << engine_info(true)
- << "\n" << Options
- << "\nuciok" << endl;
-
- else if (token == "perft" && (is >> token)) // Read depth
+ else if (token == "perft" && (is >> token)) // Read perft depth
{
stringstream ss;
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 << sync_endl;
- else
- cout << "Unknown command: " << cmd << endl;
+ else if (token == "uci")
+ sync_cout << "id name " << engine_info(true)
+ << "\n" << Options
+ << "\nuciok" << sync_endl;
- if (!args.empty()) // Command line arguments have one-shot behaviour
+ else if (token == "eval")
{
- Threads.wait_for_search_finished();
- break;
+ Search::RootColor = pos.side_to_move(); // Ensure it is set
+ sync_cout << Eval::trace(pos) << 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
+ sync_cout << "Unknown command: " << cmd << sync_endl;
+
+ } while (token != "quit" && args.empty()); // Args have one-shot behaviour
+
+ Threads.wait_for_think_finished(); // Cannot quit while search is running
}
namespace {
- // set_position() is called when engine receives the "position" UCI command.
+ // 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, istringstream& is) {
-
- // Keep track of position keys along the setup moves (from start position to the
- // position just before to start searching). Needed by repetition draw detection.
- static std::deque<StateInfo> st;
+ void position(Position& pos, istringstream& is) {
Move m;
string token, fen;
else
return;
- pos.from_fen(fen, Options["UCI_Chess960"], Threads.main_thread());
- st.clear();
+ pos.set(fen, Options["UCI_Chess960"], Threads.main());
+ SetupStates = Search::StateStackPtr(new std::stack<StateInfo>());
// Parse move list (if any)
while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE)
{
- st.push_back(StateInfo());
- pos.do_move(m, st.back());
+ SetupStates->push(StateInfo());
+ pos.do_move(m, SetupStates->top());
}
}
- // set_option() is called when engine receives the "setoption" UCI command. The
+ // setoption() is called when engine receives the "setoption" UCI command. The
// function updates the UCI option ("name") to the given value ("value").
- void set_option(istringstream& is) {
+ void setoption(istringstream& is) {
string token, name, value;
if (Options.count(name))
Options[name] = value;
else
- cout << "No such option: " << name << endl;
+ sync_cout << "No such option: " << name << sync_endl;
}
// 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 thinking time and other parameters from the input string, and starts
// the search.
- void go(Position& pos, istringstream& is) {
+ void go(const Position& pos, istringstream& is) {
Search::LimitsType limits;
vector<Move> searchMoves;
while (is >> token)
{
- 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 == "infinite")
- limits.infinite = true;
- else if (token == "ponder")
- limits.ponder = true;
- else if (token == "searchmoves")
+ if (token == "searchmoves")
while (is >> token)
searchMoves.push_back(move_from_uci(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;
}
- Threads.start_searching(pos, limits, searchMoves);
+ Threads.start_thinking(pos, limits, searchMoves, SetupStates);
}
}
projects / stockfish / blobdiff