#include "move.h"
#include "movegen.h"
#include "position.h"
-#include "san.h"
#include "search.h"
#include "ucioption.h"
void set_position(Position& pos, UCIParser& up);
bool go(Position& pos, UCIParser& up);
void perft(Position& pos, UCIParser& up);
- Move parse_uci_move(const Position& pos, const std::string &str);
}
namespace {
- // parse_uci_move() takes a position and a string as input, and attempts to
- // convert the string to a move, using simple coordinate notation (g1f3,
- // a7a8q, etc.). In order to correctly parse en passant captures and castling
- // moves, we need the position. This function is not robust, and expects that
- // the input move is legal and correctly formatted.
-
- Move parse_uci_move(const Position& pos, const std::string& str) {
-
- Square from, to;
- Piece piece;
- Color us = pos.side_to_move();
-
- if (str.length() < 4)
- return MOVE_NONE;
-
- // Read the from and to squares
- from = make_square(file_from_char(str[0]), rank_from_char(str[1]));
- to = make_square(file_from_char(str[2]), rank_from_char(str[3]));
-
- // Find the moving piece
- piece = pos.piece_on(from);
-
- // If the string has more than 4 characters, try to interpret the 5th
- // character as a promotion.
- if (str.length() > 4 && piece == piece_of_color_and_type(us, PAWN))
- {
- switch (tolower(str[4])) {
- case 'n':
- return make_promotion_move(from, to, KNIGHT);
- case 'b':
- return make_promotion_move(from, to, BISHOP);
- case 'r':
- return make_promotion_move(from, to, ROOK);
- case 'q':
- return make_promotion_move(from, to, QUEEN);
- }
- }
-
- // En passant move? We assume that a pawn move is an en passant move
- // if the destination square is epSquare.
- if (to == pos.ep_square() && piece == piece_of_color_and_type(us, PAWN))
- return make_ep_move(from, to);
-
- // Is this a castling move? A king move is assumed to be a castling move
- // if the destination square is occupied by a friendly rook, or if the
- // distance between the source and destination squares is more than 1.
- if (piece == piece_of_color_and_type(us, KING))
- {
- if (pos.piece_on(to) == piece_of_color_and_type(us, ROOK))
- return make_castle_move(from, to);
-
- if (square_distance(from, to) > 1)
- {
- // This is a castling move, but we have to translate it to the
- // internal "king captures rook" representation.
- SquareDelta delta = (to > from ? DELTA_E : DELTA_W);
- Square s = from;
-
- do s += delta;
- while ( pos.piece_on(s) != piece_of_color_and_type(us, ROOK)
- && relative_rank(us, s) == RANK_1);
-
- return relative_rank(us, s) == RANK_1 ? make_castle_move(from, s) : MOVE_NONE;
- }
- }
-
- return make_move(from, to);
- }
-
// set_position() is called when Stockfish receives the "position" UCI
// command. The input parameter is a UCIParser. It is assumed
// that this parser has consumed the first token of the UCI command
void set_position(Position& pos, UCIParser& up) {
- string token;
+ string fen, token;
- if (!(up >> token) || (token != "startpos" && token != "fen"))
- return;
+ up >> token; // operator>>() skips any whitespace
if (token == "startpos")
{
pos.from_fen(StartPositionFEN, false);
- if (!(up >> token))
- return;
+ up >> token; // Consume "moves" token
}
- else // fen
+ else if (token == "fen")
{
- string fen;
while (up >> token && token != "moves")
- {
- fen += token;
- fen += ' ';
- }
+ fen += token + " ";
+
pos.from_fen(fen, Options["UCI_Chess960"].value<bool>());
}
+ else return;
- if (token != "moves")
- return;
-
- // Parse optional move list
- Move move;
- StateInfo st;
+ // Parse move list (if any)
while (up >> token)
- {
- move = parse_uci_move(pos, token);
- pos.do_setup_move(move, st);
- }
- // Our StateInfo st is about going out of scope so copy
- // its content inside pos before it disappears.
- pos.detach();
+ pos.do_setup_move(move_from_uci(pos, token));
}
void set_option(UCIParser& up) {
- string token, name, value;
+ string value = "true"; // UCI buttons don't have a "value" field
+ string token, name;
- if (!(up >> token) || token != "name") // operator>>() skips any whitespace
- return;
-
- if (!(up >> name))
- return;
+ up >> token; // Consume "name" token
+ up >> name; // Read option name
// Handle names with included spaces
while (up >> token && token != "value")
- name += (" " + token);
+ name += " " + token;
- if (Options.find(name) == Options.end())
- {
- cout << "No such option: " << name << endl;
- return;
- }
-
- // Is a button ?
- if (token != "value")
- {
- Options[name].set_value("true");
- return;
- }
-
- if (!(up >> value))
- return;
+ up >> value; // Read option value
// Handle values with included spaces
while (up >> token)
- value += (" " + token);
+ value += " " + token;
- Options[name].set_value(value);
+ if (Options.find(name) != Options.end())
+ Options[name].set_value(value);
+ else
+ cout << "No such option: " << name << endl;
}
{
int numOfMoves = 0;
while (up >> token)
- searchMoves[numOfMoves++] = parse_uci_move(pos, token);
+ searchMoves[numOfMoves++] = move_from_uci(pos, token);
searchMoves[numOfMoves] = MOVE_NONE;
}
projects / stockfish / blobdiff