using namespace std;
-////
-//// Local definitions:
-////
namespace {
typedef istringstream UCIParser;
// Local functions
- bool handle_command(Position& pos, const string& command);
void set_option(UCIParser& uip);
void set_position(Position& pos, UCIParser& uip);
bool go(Position& pos, UCIParser& uip);
}
-////
-//// Functions
-////
-
-/// 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. 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.
+/// execute_uci_command() takes a string as input, uses a UCIParser
+/// 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 uci_main_loop() {
+bool execute_uci_command(const string& cmd) {
- Position pos(StartPositionFEN, 0); // The root position
- string command;
+ static Position pos(StartPositionFEN, 0); // The root position
+ UCIParser up(cmd);
+ string token;
- do {
- // Wait for a command from stdin
- if (!getline(cin, command))
- command = "quit";
+ if (!(up >> token)) // operator>>() skips any whitespace
+ return true;
- } while (handle_command(pos, command));
-}
+ if (token == "quit")
+ return false;
+ if (token == "go")
+ return go(pos, up);
-////
-//// Local functions
-////
-
-namespace {
-
- // handle_command() takes a string as input, uses a UCIParser
- // 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(Position& pos, const string& command) {
-
- UCIParser up(command);
- string token;
-
- if (!(up >> token)) // operator>>() skips any whitespace
- return true;
-
- if (token == "quit")
- return false;
+ if (token == "uci")
+ {
+ cout << "id name " << engine_name()
+ << "\nid author Tord Romstad, Marco Costalba, Joona Kiiski\n";
+ print_uci_options();
+ cout << "uciok" << endl;
+ }
+ else if (token == "ucinewgame")
+ pos.from_fen(StartPositionFEN);
- if (token == "go")
- return go(pos, up);
+ else if (token == "isready")
+ cout << "readyok" << endl;
- if (token == "uci")
- {
- cout << "id name " << engine_name()
- << "\nid author Tord Romstad, Marco Costalba, Joona Kiiski\n";
- print_uci_options();
- cout << "uciok" << endl;
- }
- else if (token == "ucinewgame")
- pos.from_fen(StartPositionFEN);
+ else if (token == "position")
+ set_position(pos, up);
- else if (token == "isready")
- cout << "readyok" << endl;
+ else if (token == "setoption")
+ set_option(up);
- else if (token == "position")
- set_position(pos, up);
+ // The remaining commands are for debugging purposes only
+ else if (token == "d")
+ pos.print();
- else if (token == "setoption")
- set_option(up);
+ else if (token == "flip")
+ {
+ Position p(pos, pos.thread());
+ pos.flipped_copy(p);
+ }
+ else if (token == "eval")
+ {
+ Value evalMargin;
+ cout << "Incremental mg: " << mg_value(pos.value())
+ << "\nIncremental eg: " << eg_value(pos.value())
+ << "\nFull eval: " << evaluate(pos, evalMargin) << endl;
+ }
+ else if (token == "key")
+ cout << "key: " << hex << pos.get_key()
+ << "\nmaterial key: " << pos.get_material_key()
+ << "\npawn key: " << pos.get_pawn_key() << endl;
- // The remaining commands are for debugging purposes only
- else if (token == "d")
- pos.print();
+ else if (token == "perft")
+ perft(pos, up);
- else if (token == "flip")
- {
- Position p(pos, pos.thread());
- pos.flipped_copy(p);
- }
- else if (token == "eval")
- {
- Value evalMargin;
- cout << "Incremental mg: " << mg_value(pos.value())
- << "\nIncremental eg: " << eg_value(pos.value())
- << "\nFull eval: " << evaluate(pos, evalMargin) << endl;
- }
- else if (token == "key")
- cout << "key: " << hex << pos.get_key()
- << "\nmaterial key: " << pos.get_material_key()
- << "\npawn key: " << pos.get_pawn_key() << endl;
+ else
+ cout << "Unknown command: " << cmd << endl;
- else if (token == "perft")
- perft(pos, up);
+ return true;
+}
- else
- cout << "Unknown command: " << command << endl;
- return true;
- }
+////
+//// Local functions
+////
+namespace {
// set_position() is called when Stockfish receives the "position" UCI
// command. The input parameter is a UCIParser. It is assumed
string token;
- if (!(up >> token)) // operator>>() skips any whitespace
+ if (!(up >> token) || (token != "startpos" && token != "fen"))
return;
if (token == "startpos")
+ {
pos.from_fen(StartPositionFEN);
- else if (token == "fen")
+ if (!(up >> token))
+ return;
+ }
+ else // fen
{
string fen;
while (up >> token && token != "moves")
pos.from_fen(fen);
}
- if (up.good())
+ if (token != "moves")
+ return;
+
+ // Parse optional move list
+ Move move;
+ StateInfo st;
+ while (up >> token)
{
- if (token != "moves")
- up >> token;
+ move = move_from_uci(pos, token);
+ pos.do_move(move, st);
+ if (pos.rule_50_counter() == 0)
+ pos.reset_game_ply();
- if (token == "moves")
- {
- Move move;
- StateInfo st;
- while (up >> token)
- {
- move = move_from_uci(pos, token);
- pos.do_move(move, st);
- if (pos.rule_50_counter() == 0)
- pos.reset_game_ply();
-
- pos.inc_startpos_ply_counter(); //FIXME: make from_fen to support this and rule50
- }
- // Our StateInfo st is about going out of scope so copy
- // its content inside pos before it disappears.
- pos.detach();
- }
+ pos.inc_startpos_ply_counter(); //FIXME: make from_fen to support this and rule50
}
+ // Our StateInfo st is about going out of scope so copy
+ // its content inside pos before it disappears.
+ pos.detach();
}