/*
- Glaurung, a UCI chess playing engine.
- Copyright (C) 2004-2008 Tord Romstad
+ 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
- Glaurung is free software: you can redistribute it and/or modify
+ Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
-
- Glaurung is distributed in the hope that it will be useful,
+
+ Stockfish is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
-////
-//// Includes
-////
-
#include <iostream>
+#include <sstream>
#include <string>
-#include "book.h"
#include "evaluate.h"
-#include "misc.h"
-#include "move.h"
-#include "movegen.h"
+#include "notation.h"
#include "position.h"
-#include "san.h"
#include "search.h"
-#include "uci.h"
+#include "thread.h"
+#include "tt.h"
#include "ucioption.h"
+using namespace std;
-////
-//// Local definitions:
-////
+extern void benchmark(const Position& pos, istream& is);
namespace {
- // UCIInputParser is a class for parsing UCI input. The class is
- // very simple, and basically just consist of a constant input
- // string and a current location in the string. There are methods
- // for checking if we are at the end of the line, for getting the
- // next token (defined as any whitespace-delimited sequence of
- // characters), and for getting the rest of the line as a single
- // string.
+ // FEN string of the initial position, normal chess
+ const char* StartFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
- class UCIInputParser {
+ // 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;
- public:
- UCIInputParser(const std::string &line);
- std::string get_next_token();
- std::string get_rest_of_line();
- bool at_end_of_line();
+ void set_option(istringstream& up);
+ void set_position(Position& pos, istringstream& up);
+ void go(Position& pos, istringstream& up);
+}
- private:
- const std::string &inputLine;
- int length, currentIndex;
- void skip_whitespace();
+/// 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.
- };
+void UCI::loop(const string& args) {
+ Position pos(StartFEN, false, Threads.main_thread()); // The root position
+ string token, cmd = args;
- // 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;
+ do {
+ if (args.empty() && !getline(cin, cmd)) // Block here waiting for input
+ cmd = "quit";
- // Local functions
- void wait_for_command();
- void handle_command(const std::string &command);
- void set_option(UCIInputParser &uip);
- void set_position(UCIInputParser &uip);
- void go(UCIInputParser &uip);
-}
+ istringstream is(cmd);
+ is >> skipws >> token;
-////
-//// Functions
-////
+ if (token == "quit" || token == "stop" || token == "ponderhit")
+ {
+ // 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()->notify_one(); // Could be sleeping
+ }
+ else
+ Search::Limits.ponder = false;
+ }
+ else if (token == "perft" && (is >> token)) // Read perft depth
+ {
+ stringstream ss;
-/// 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.
+ ss << Options["Hash"] << " "
+ << Options["Threads"] << " " << token << " current perft";
-void uci_main_loop() {
- RootPosition.from_fen(StartPosition);
- while(1) wait_for_command();
+ benchmark(pos, ss);
+ }
+ else if (token == "key") sync_cout << "position key: " << hex << pos.key()
+ << "\nmaterial key: " << pos.material_key()
+ << "\npawn key: " << pos.pawn_key()
+ << sync_endl;
+
+ else if (token == "uci") sync_cout << "id name " << engine_info(true)
+ << "\n" << Options
+ << "\nuciok" << sync_endl;
+
+ else if (token == "ucinewgame") TT.clear();
+ else if (token == "go") go(pos, is);
+ else if (token == "position") set_position(pos, is);
+ else if (token == "setoption") set_option(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 if (token == "eval") sync_cout << Eval::trace(pos) << 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
}
-////
-//// Local functions
-////
-
namespace {
- ///
- /// Implementation of the UCIInputParser class.
- ///
-
- // Constructor for the UCIInputParser class. The constructor takes a
- // text string containing a single UCI command as input.
-
- UCIInputParser::UCIInputParser(const std::string &line) : inputLine(line) {
- this->currentIndex = 0;
- this->length = line.length();
- }
-
-
- // UCIInputParser::skip_whitspace() skips any number of whitespace
- // characters from the current location in an input string.
-
- void UCIInputParser::skip_whitespace() {
- while(isspace(std::char_traits<char>::to_int_type(this->inputLine[this->currentIndex])))
- this->currentIndex++;
- }
-
-
- // UCIInputParser::get_next_token() gets the next token in an UCI
- // command. A 'token' in an UCI command is simply any
- // whitespace-delimited sequence of characters.
-
- std::string UCIInputParser::get_next_token() {
- int i, j;
+ // 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").
- this->skip_whitespace();
- for(i = j = this->currentIndex;
- j < this->length && !isspace(this->inputLine[j]);
- j++);
- this->currentIndex = j;
- this->skip_whitespace();
+ void set_position(Position& pos, istringstream& is) {
- std::string str = this->inputLine.substr(i, j - i);
-
- return str;
- }
+ Move m;
+ string token, fen;
+ is >> token;
- // UCIInputParser::get_rest_of_line() returns the rest of the input
- // line (from the current location) as a single string.
-
- std::string UCIInputParser::get_rest_of_line() {
- this->skip_whitespace();
- return this->inputLine.substr(this->currentIndex, this->length);
+ if (token == "startpos")
+ {
+ fen = StartFEN;
+ is >> token; // Consume "moves" token if any
+ }
+ else if (token == "fen")
+ while (is >> token && token != "moves")
+ fen += token + " ";
+ else
+ return;
+
+ pos.set(fen, Options["UCI_Chess960"], Threads.main_thread());
+ SetupStates = Search::StateStackPtr(new std::stack<StateInfo>());
+
+ // Parse move list (if any)
+ while (is >> token && (m = move_from_uci(pos, token)) != MOVE_NONE)
+ {
+ SetupStates->push(StateInfo());
+ pos.do_move(m, SetupStates->top());
+ }
}
- // UCIInputParser::at_end_of_line() tests whether we have reached the
- // end of the input string, i.e. if any more input remains to be
- // parsed.
+ // set_option() is called when engine receives the "setoption" UCI command. The
+ // function updates the UCI option ("name") to the given value ("value").
- bool UCIInputParser::at_end_of_line() {
- return this->currentIndex == this->length;
- }
+ void set_option(istringstream& is) {
+ string token, name, value;
- ///
- /// Other functions
- ///
+ is >> token; // Consume "name" token
+ // Read option name (can contain spaces)
+ while (is >> token && token != "value")
+ name += string(" ", !name.empty()) + token;
- // wait_for_command() waits for a command from the user, and passes
- // this command to handle_command. wait_for_command also intercepts
- // EOF from stdin, by translating EOF to the "quit" command. This
- // ensures that Glaurung exits gracefully if the GUI dies
- // unexpectedly.
+ // Read option value (can contain spaces)
+ while (is >> token)
+ value += string(" ", !value.empty()) + token;
- void wait_for_command() {
- std::string command;
- if(!std::getline(std::cin, command)) command = "quit";
- handle_command(command);
+ if (Options.count(name))
+ Options[name] = value;
+ else
+ sync_cout << "No such option: " << name << sync_endl;
}
- // 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.
-
- void handle_command(const std::string &command) {
- UCIInputParser uip(command);
- std::string s = uip.get_next_token();
-
- if(s == "quit") {
- OpeningBook.close();
- stop_threads();
- quit_eval();
- exit(0);
- }
- else if(s == "uci") {
- std::cout << "id name " << engine_name() << std::endl;
- std::cout << "id author Tord Romstad" << std::endl;
- print_uci_options();
- std::cout << "uciok" << std::endl;
- }
- else if(s == "ucinewgame") {
- TT.clear();
- Position::init_piece_square_tables();
- RootPosition.from_fen(StartPosition);
- }
- else if(s == "isready")
- std::cout << "readyok" << std::endl;
- else if(s == "position")
- set_position(uip);
- else if(s == "setoption")
- set_option(uip);
- else if(s == "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(s == "d")
- RootPosition.print();
- else if(s == "flip") {
- Position p(RootPosition);
- RootPosition.flipped_copy(p);
- }
- else if(s == "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(s == "key") {
- std::cout << "key: " << RootPosition.get_key()
- << " material key: " << RootPosition.get_material_key()
- << " pawn key: " << RootPosition.get_pawn_key()
- << std::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 starts
+ // the search.
+
+ void go(Position& pos, istringstream& is) {
+
+ Search::LimitsType limits;
+ vector<Move> searchMoves;
+ string token;
+
+ while (is >> token)
+ {
+ 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;
}
- else {
- std::cout << "Unknown command: " << command << std::endl;
- while(!uip.at_end_of_line()) {
- std::cout << uip.get_next_token() << std::endl;
- }
- }
- }
-
-
- // set_position() is called when Glaurung receives the "position" UCI
- // command. The input parameter is a UCIInputParser. 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) {
- std::string token;
-
- token = uip.get_next_token();
- if(token == "startpos")
- RootPosition.from_fen(StartPosition);
- else if(token == "fen") {
- std::string fen;
- while(token != "moves" && !uip.at_end_of_line()) {
- token = uip.get_next_token();
- fen += token;
- fen += ' ';
- }
- RootPosition.from_fen(fen);
- }
-
- if(!uip.at_end_of_line()) {
- if(token != "moves")
- token = uip.get_next_token();
- if(token == "moves") {
- Move move;
- UndoInfo u;
- while(!uip.at_end_of_line()) {
- token = uip.get_next_token();
- move = move_from_string(RootPosition, token);
- RootPosition.do_move(move, u);
- if(RootPosition.rule_50_counter() == 0)
- RootPosition.reset_game_ply();
- }
- }
- }
- }
-
-
- // set_option() is called when Glaurung receives the "setoption" UCI
- // command. The input parameter is a UCIInputParser. 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) {
- std::string token;
- if(!uip.at_end_of_line()) {
- token = uip.get_next_token();
- if(token == "name" && !uip.at_end_of_line()) {
- std::string name = uip.get_next_token();
- std::string nextToken;
- while(!uip.at_end_of_line()
- && (nextToken = uip.get_next_token()) != "value")
- name += (" " + nextToken);
- if(nextToken == "value")
- set_option_value(name, uip.get_rest_of_line());
- else
- push_button(name);
- }
- }
- }
-
-
- // go() is called when Glaurung receives the "go" UCI command. The
- // input parameter is a UCIInputParser. 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.
-
- void go(UCIInputParser &uip) {
- std::string token;
- int time[2] = {0, 0}, inc[2] = {0, 0}, movesToGo = 0, depth = 0, nodes = 0;
- int moveTime = 0;
- bool infinite = false, ponder = false;
- Move searchMoves[500];
-
- searchMoves[0] = MOVE_NONE;
-
- while(!uip.at_end_of_line()) {
- token = uip.get_next_token();
-
- if(token == "infinite")
- infinite = true;
- else if(token == "ponder")
- ponder = true;
- else if(token == "wtime") {
- if(!uip.at_end_of_line())
- time[0] = atoi(uip.get_next_token().c_str());
- }
- else if(token == "btime") {
- if(!uip.at_end_of_line())
- time[1] = atoi(uip.get_next_token().c_str());
- }
- else if(token == "winc") {
- if(!uip.at_end_of_line())
- inc[0] = atoi(uip.get_next_token().c_str());
- }
- else if(token == "binc") {
- if(!uip.at_end_of_line())
- inc[1] = atoi(uip.get_next_token().c_str());
- }
- else if(token == "movestogo") {
- if(!uip.at_end_of_line())
- movesToGo = atoi(uip.get_next_token().c_str());
- }
- else if(token == "depth") {
- if(!uip.at_end_of_line())
- depth = atoi(uip.get_next_token().c_str());
- }
- else if(token == "nodes") {
- if(!uip.at_end_of_line())
- nodes = atoi(uip.get_next_token().c_str());
- }
- else if(token == "movetime") {
- if(!uip.at_end_of_line())
- moveTime = atoi(uip.get_next_token().c_str());
- }
- else if(token == "searchmoves" && !uip.at_end_of_line()) {
- int numOfMoves = 0;
- while(!uip.at_end_of_line()) {
- token = uip.get_next_token();
- searchMoves[numOfMoves++] = move_from_string(RootPosition, token);
- }
- searchMoves[numOfMoves] = MOVE_NONE;
- }
- }
-
- if(moveTime)
- infinite = true; // HACK
- think(RootPosition, infinite, ponder, time[RootPosition.side_to_move()],
- inc[RootPosition.side_to_move()], movesToGo, depth, nodes, moveTime,
- searchMoves);
+ Threads.start_thinking(pos, limits, searchMoves, SetupStates);
}
-
}
projects / stockfish / blobdiff