/*
- 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) 2008-2009 Marco Costalba
- 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 <cassert>
#include <iostream>
+#include <sstream>
#include <string>
#include "book.h"
#include "uci.h"
#include "ucioption.h"
+using namespace std;
////
//// Local definitions:
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.
-
- class UCIInputParser {
-
- public:
- UCIInputParser(const std::string &line);
- std::string get_next_token();
- std::string get_rest_of_line();
- bool at_end_of_line();
+ // UCIInputParser is a class for parsing UCI input. The class
+ // is actually a string stream built on a given input string.
- private:
- const std::string &inputLine;
- int length, currentIndex;
+ typedef istringstream UCIInputParser;
- void skip_whitespace();
-
- };
-
-
- // 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()
+ // 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;
// 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);
+ bool handle_command(const string& command);
+ void set_option(UCIInputParser& uip);
+ void set_position(UCIInputParser& uip);
+ bool go(UCIInputParser& uip);
}
//// Functions
////
-/// uci_main_loop() is the only global function in this file. It is
+/// 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.
+/// command. It waits for a command from the user, and passes this
+/// command to handle_command and also intercepts EOF from stdin,
+/// by translating EOF to the "quit" command. This ensures that Stockfish
+/// exits gracefully if the GUI dies unexpectedly.
void uci_main_loop() {
+
RootPosition.from_fen(StartPosition);
- while(1) wait_for_command();
+ string command;
+
+ do {
+ // Wait for a command from stdin
+ if (!getline(cin, command))
+ command = "quit";
+
+ } while (handle_command(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) : 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;
-
- this->skip_whitespace();
- for(i = j = this->currentIndex;
- j < this->length && !isspace(this->inputLine[j]);
- j++);
- this->currentIndex = j;
- this->skip_whitespace();
-
- std::string str = this->inputLine.substr(i, j - i);
-
- return str;
- }
-
-
- // 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);
- }
-
-
- // 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 this->currentIndex == this->length;
- }
-
-
- ///
- /// Other functions
- ///
+ // 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.
+ bool handle_command(const string& command) {
- // 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.
+ UCIInputParser uip(command);
+ string token;
- void wait_for_command() {
- std::string command;
- if(!std::getline(std::cin, command)) command = "quit";
- handle_command(command);
- }
+ uip >> token; // operator>>() skips any whitespace
+ if (token == "quit")
+ return false;
- // 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 (token == "go")
+ return go(uip);
- 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;
+ if (token == "uci")
+ {
+ cout << "id name " << engine_name()
+ << "\nid author Tord Romstad, Marco Costalba\n";
+ print_uci_options();
+ cout << "uciok" << endl;
}
- else if(s == "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(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);
+ else if (token == "isready")
+ cout << "readyok" << endl;
+ else if (token == "position")
+ set_position(uip);
+ else if (token == "setoption")
+ set_option(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 (token == "d")
+ RootPosition.print();
+ else if (token == "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 (token == "eval")
+ {
+ EvalInfo ei;
+ cout << "Incremental mg: " << RootPosition.mg_value()
+ << "\nIncremental eg: " << RootPosition.eg_value()
+ << "\nFull eval: " << evaluate(RootPosition, ei, 0) << 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;
- }
- 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")
+ cout << "key: " << hex << RootPosition.get_key()
+ << "\nmaterial key: " << RootPosition.get_material_key()
+ << "\npawn key: " << RootPosition.get_pawn_key() << endl;
+ else
+ {
+ cout << "Unknown command: " << command << endl;
+ while (!uip.eof())
+ {
+ uip >> token;
+ cout << token << endl;
+ }
}
+ return true;
}
- // set_position() is called when Glaurung receives the "position" UCI
- // command. The input parameter is a UCIInputParser. It is assumed
+ // set_position() is called when Stockfish 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);
+ void set_position(UCIInputParser& uip) {
+
+ string token;
+
+ uip >> token; // operator>>() skips any whitespace
+
+ if (token == "startpos")
+ RootPosition.from_fen(StartPosition);
+ else if (token == "fen")
+ {
+ 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;
+ StateInfo st;
+ while (!uip.eof())
+ {
+ uip >> token;
+ move = move_from_string(RootPosition, token);
+ RootPosition.do_move(move, st);
+ if (RootPosition.rule_50_counter() == 0)
+ RootPosition.reset_game_ply();
+ }
+ // Our StateInfo st is about going out of scope so copy
+ // its content inside RootPosition before they disappear.
+ RootPosition.saveState();
}
- }
}
}
- // set_option() is called when Glaurung receives the "setoption" UCI
- // command. The input parameter is a UCIInputParser. It is assumed
+ // set_option() is called when Stockfish 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);
- }
+ void set_option(UCIInputParser& uip) {
+
+ string token, name;
+
+ uip >> token;
+ if (token == "name")
+ {
+ uip >> name;
+ while (!uip.eof())
+ {
+ uip >> token;
+ if (token == "value")
+ break;
+
+ name += (" " + token);
+ }
+ if (token == "value")
+ {
+ getline(uip, token); // reads until end of line
+ set_option_value(name, token);
+ } 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
+ // go() is called when Stockfish 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
+ // 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.
+ // parameters. Returns false if a quit command is received while
+ // thinking, returns true otherwise.
+
+ bool go(UCIInputParser& uip) {
- 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;
+ string token;
+
+ 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
+
+ assert(RootPosition.is_ok());
- think(RootPosition, infinite, ponder, time[RootPosition.side_to_move()],
- inc[RootPosition.side_to_move()], movesToGo, depth, nodes, moveTime,
- searchMoves);
+ return think(RootPosition, infinite, ponder, RootPosition.side_to_move(),
+ time, inc, movesToGo, depth, nodes, moveTime, searchMoves);
}
-
+
}
projects / stockfish / blobdiff