/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008 Marco Costalba
+ Copyright (C) 2008-2009 Marco Costalba
Stockfish is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
//// Includes
////
+#include <cassert>
#include <iostream>
#include <sstream>
#include <string>
#include "uci.h"
#include "ucioption.h"
+using namespace std;
////
//// Local definitions:
namespace {
- // UCIInputParser is a class for parsing UCI input. The class
+ // 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;
+ typedef 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()
+ // 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 get_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);
+ string command;
- while (1)
- get_command();
+ do {
+ // Wait for a command from stdin
+ if (!getline(cin, command))
+ command = "quit";
+
+ } while (handle_command(command));
}
namespace {
- // 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 Stockfish exits gracefully if the GUI dies
- // unexpectedly.
-
- void get_command() {
-
- std::string command;
-
- if (!std::getline(std::cin, command))
- command = "quit";
-
- handle_command(command);
- }
-
-
// 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
+ // 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) {
+ bool handle_command(const string& command) {
UCIInputParser uip(command);
- std::string token;
+ string token;
- uip >> token; // operator >> skips any whitespace
+ uip >> token; // operator>>() skips any whitespace
if (token == "quit")
+ return false;
+
+ if (token == "go")
+ return go(uip);
+
+ if (token == "uci")
{
- OpeningBook.close();
- stop_threads();
- quit_eval();
- exit(0);
- }
- else if (token == "uci")
- {
- std::cout << "id name " << engine_name() << std::endl
- << "id author Tord Romstad, Marco Costalba"
- << std::endl;
+ cout << "id name " << engine_name()
+ << "\nid author Tord Romstad, Marco Costalba\n";
print_uci_options();
- std::cout << "uciok" << std::endl;
+ cout << "uciok" << endl;
}
else if (token == "ucinewgame")
{
RootPosition.from_fen(StartPosition);
}
else if (token == "isready")
- std::cout << "readyok" << std::endl;
+ cout << "readyok" << 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
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;
+ cout << "Incremental mg: " << RootPosition.mg_value()
+ << "\nIncremental eg: " << RootPosition.eg_value()
+ << "\nFull eval: " << evaluate(RootPosition, ei, 0) << 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;
- }
+ cout << "key: " << hex << RootPosition.get_key()
+ << "\nmaterial key: " << RootPosition.get_material_key()
+ << "\npawn key: " << RootPosition.get_pawn_key() << endl;
else
{
- std::cout << "Unknown command: " << command << std::endl;
+ cout << "Unknown command: " << command << endl;
while (!uip.eof())
{
uip >> token;
- std::cout << token << std::endl;
+ cout << token << endl;
}
}
+ return true;
}
// set_position() is called when Stockfish receives the "position" UCI
- // command. The input parameter is a UCIInputParser. It is assumed
+ // 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) {
+ void set_position(UCIInputParser& uip) {
- std::string token;
+ string token;
- uip >> token; // operator >> skips any whitespace
+ uip >> token; // operator>>() skips any whitespace
if (token == "startpos")
RootPosition.from_fen(StartPosition);
else if (token == "fen")
{
- std::string fen;
+ string fen;
while (token != "moves" && !uip.eof())
{
- uip >> token;
- fen += token;
- fen += ' ';
+ uip >> token;
+ fen += token;
+ fen += ' ';
}
RootPosition.from_fen(fen);
}
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 Stockfish receives the "setoption" UCI
- // command. The input parameter is a UCIInputParser. It is assumed
+ // 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) {
+ void set_option(UCIInputParser& uip) {
- std::string token, name;
+ string token, name;
uip >> token;
if (token == "name")
{
uip >> name;
- uip >> token;
- while (!uip.eof() && token != "value")
+ while (!uip.eof())
{
- name += (" " + token);
- uip >> token;
+ uip >> token;
+ if (token == "value")
+ break;
+
+ name += (" " + token);
}
if (token == "value")
{
- std::getline(uip, token); // reads until end of line
+ getline(uip, token); // reads until end of line
set_option_value(name, token);
} else
push_button(name);
}
- // go() is called when Stockfish 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.
- void go(UCIInputParser &uip) {
+ bool go(UCIInputParser& uip) {
- std::string token;
+ string token;
int time[2] = {0, 0}, inc[2] = {0, 0};
int movesToGo = 0, depth = 0, nodes = 0, moveTime = 0;
if (moveTime)
infinite = true; // HACK
- think(RootPosition, infinite, ponder, RootPosition.side_to_move(), time,
- inc, movesToGo, depth, nodes, moveTime, searchMoves);
+ assert(RootPosition.is_ok());
+
+ return think(RootPosition, infinite, ponder, RootPosition.side_to_move(),
+ time, inc, movesToGo, depth, nodes, moveTime, searchMoves);
}
+
}
projects / stockfish / blobdiff