namespace {
- // UCIInputParser is a class for parsing UCI input. The class is
- // very simple, and basically just consist of a string stream
- // built on a given input 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.
-
- class UCIInputParser {
-
- public:
- UCIInputParser(const std::string &line);
- std::string get_next_token();
- std::string get_rest_of_line();
- bool at_end_of_line();
-
- private:
- std::istringstream inputLineStream;
-
- };
+ // UCIInputParser is a class for parsing UCI input. The class
+ // is actually a string stream built on a given input string.
+ 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()
Position RootPosition;
// Local functions
- void wait_for_command();
+ void get_command();
void handle_command(const std::string &command);
void set_option(UCIInputParser &uip);
void set_position(UCIInputParser &uip);
/// command.
void uci_main_loop() {
+
RootPosition.from_fen(StartPosition);
- while(1) wait_for_command();
+
+ while (1)
+ get_command();
}
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) : inputLineStream(line) { }
-
-
- // 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() {
-
- std::string token;
-
- inputLineStream >> token; // operator >> skips any whitespace
-
- return 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() {
-
- std::string tail;
-
- std::getline(inputLineStream, tail);
-
- return tail;
- }
-
-
- // 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.
-
- bool UCIInputParser::at_end_of_line() {
-
- return inputLineStream.eof();
- }
-
-
- ///
- /// Other functions
- ///
-
-
- // wait_for_command() waits for a command from the user, and passes
- // this command to handle_command. wait_for_command also intercepts
+ // 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 Glaurung exits gracefully if the GUI dies
// unexpectedly.
- void wait_for_command() {
+ void get_command() {
std::string command;
void handle_command(const std::string &command) {
UCIInputParser uip(command);
- std::string token = uip.get_next_token();
+ std::string token;
+
+ uip >> token; // operator >> skips any whitespace
- if(token == "quit") {
- OpeningBook.close();
- stop_threads();
- quit_eval();
- exit(0);
+ if (token == "quit")
+ {
+ OpeningBook.close();
+ stop_threads();
+ quit_eval();
+ exit(0);
}
- else if(token == "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 (token == "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(token == "ucinewgame") {
- TT.clear();
- Position::init_piece_square_tables();
- RootPosition.from_fen(StartPosition);
+ 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);
+ 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 == "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 == "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") {
- std::cout << "key: " << RootPosition.get_key()
- << " material key: " << RootPosition.get_material_key()
- << " pawn key: " << RootPosition.get_pawn_key()
- << std::endl;
- }
- else {
- std::cout << "Unknown command: " << command << std::endl;
- while(!uip.at_end_of_line()) {
- std::cout << uip.get_next_token() << std::endl;
- }
+ else if (token == "key")
+ {
+ std::cout << "key: " << RootPosition.get_key()
+ << " material key: " << RootPosition.get_material_key()
+ << " pawn key: " << RootPosition.get_pawn_key()
+ << std::endl;
+ }
+ else
+ {
+ std::cout << "Unknown command: " << command << std::endl;
+ while (!uip.eof())
+ {
+ uip >> token;
+ std::cout << token << std::endl;
+ }
}
}
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);
+ uip >> token; // operator >> skips any whitespace
+
+ if (token == "startpos")
+ RootPosition.from_fen(StartPosition);
+ else if (token == "fen")
+ {
+ std::string fen;
+ while (token != "moves" && !uip.eof())
+ {
+ uip >> 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();
+ if (!uip.eof())
+ {
+ if (token != "moves")
+ uip >> token;
+ if (token == "moves")
+ {
+ Move move;
+ UndoInfo u;
+ while (!uip.eof())
+ {
+ uip >> token;
+ move = move_from_string(RootPosition, token);
+ RootPosition.do_move(move, u);
+ if (RootPosition.rule_50_counter() == 0)
+ RootPosition.reset_game_ply();
+ }
}
- }
}
}
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);
- }
+ std::string token, name;
+
+ uip >> token;
+ if (token == "name")
+ {
+ 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);
}
}
std::string token;
- int time[2] = {0, 0}, inc[2] = {0, 0}, movesToGo = 0, depth = 0, nodes = 0;
- int moveTime = 0;
+ 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];
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);
+ while (!uip.eof())
+ {
+ uip >> token;
+
+ if (token == "infinite")
+ infinite = true;
+ else if (token == "ponder")
+ ponder = true;
+ else if (token == "wtime")
+ uip >> time[0];
+ else if (token == "btime")
+ uip >> time[1];
+ else if (token == "winc")
+ uip >> inc[0];
+ else if (token == "binc")
+ uip >> inc[1];
+ else if (token == "movestogo")
+ uip >> movesToGo;
+ else if (token == "depth")
+ uip >> depth;
+ else if (token == "nodes")
+ uip >> nodes;
+ else if (token == "movetime")
+ uip >> moveTime;
+ else if (token == "searchmoves")
+ {
+ int numOfMoves = 0;
+ while (!uip.eof())
+ {
+ uip >> token;
+ searchMoves[numOfMoves++] = move_from_string(RootPosition, token);
+ }
+ searchMoves[numOfMoves] = MOVE_NONE;
}
- searchMoves[numOfMoves] = MOVE_NONE;
- }
}
- if(moveTime)
- infinite = true; // HACK
+ if (moveTime)
+ infinite = true; // HACK
think(RootPosition, infinite, ponder, time[RootPosition.side_to_move()],
inc[RootPosition.side_to_move()], movesToGo, depth, nodes, moveTime,
searchMoves);
}
-
}