stellar

UCI Chess engine written in C++20

git clone git://git.dimitrijedobrota.com/stellar.git

game.cpp (3877B)

0 #include "game.hpp" 1 2 #include "board.hpp" 3 #include "logger.hpp" 4 #include "timer.hpp" 5 #include "utils_ui.hpp" 6 7 #include <format> 8 9 bool Game::san = true; 10 const std::string Game::startPosition = start_position; 11 12 uint16_t Game::id_t = 0; 13 Game::~Game() { logger::log(std::format("Game {}: destroyed", id), logger::Debug); } 14 Game::Game(const uint16_t match_id, const std::string &white, const std::string &black, 15 const std::string &fen) 16 : match_id(match_id), white(white), black(black), fen(fen) { 17 logger::log(std::format("Game {}: started", id), logger::Debug); 18 } 19 20 const std::string Game::get_moves() const { 21 std::string res; 22 if (list.size()) res += (std::string)list[0]; 23 for (int i = 1; i < list.size(); i++) 24 res += " " + (std::string)list[i]; 25 return res; 26 } 27 28 const std::string Game::to_san(const Board &board, const Move move) { 29 Board copy = board; 30 if (!move.make(copy)) { 31 logger::log("illegal move", logger::Critical); 32 throw std::runtime_error("illegal move"); 33 } 34 35 if (move.is_castle_king()) return "O-O"; 36 if (move.is_castle_queen()) return "O-O-O"; 37 38 const Type piece = board.get_square_piece_type(move.source()); 39 const Type target = board.get_square_piece_type(move.target()); 40 41 std::string res; 42 if (piece != PAWN) { 43 res += piece::get_code(piece, WHITE); 44 45 U64 potential = board.get_bitboard_square_land(move.target(), piece, board.get_side()); 46 if (bit::count(potential) > 1) { 47 int file[9] = {0}, rank[9] = {0}; 48 uint8_t square_i = 0; 49 bitboard_for_each_bit(square_i, potential) { 50 const std::string crd = to_coordinates(static_cast<Square>(square_i)); 51 file[crd[0] & 0x3]++; 52 rank[crd[1] & 0x3]++; 53 } 54 55 const std::string crd = to_coordinates(move.source()); 56 if (file[crd[0] & 0x3] == 1) res += crd[0]; 57 else if (rank[crd[1] & 0x3] == 1) 58 res += crd[1]; 59 else 60 res += crd; 61 } 62 63 if (target != Type::NO_TYPE) res += "x"; 64 res += to_coordinates(move.target()); 65 } else { 66 if (target != Type::NO_TYPE) res += std::format("{}x", to_coordinates(move.source())[0]); 67 res += to_coordinates(move.target()); 68 if (move.is_promote()) res += piece::get_code(move.promoted(), WHITE); 69 if (move.is_enpassant()) res += " e.p."; 70 } 71 72 if (!MoveList(copy, false, true).size()) res += "#"; 73 else if (copy.is_check()) 74 res += "+"; 75 76 return res; 77 } 78 79 std::ostream &operator<<(std::ostream &os, const Game &game) { 80 static const std::string name[] = {"death", "time forfeit", "rules infraction", "repetition"}; 81 os << std::format("[Event \"Match {}\"]", game.match_id); 82 os << std::format("\n[Site \"{}\"]", "Stellar Arena"); 83 os << std::format("\n[Date \"{}\"]", timer::get_ms()); 84 os << std::format("\n[Round \"{}\"]", game.id); 85 os << std::format("\n[White \"{}\"]", game.get_white()); 86 os << std::format("\n[Black \"{}\"]", game.get_black()); 87 os << std::format("\n[Result \"{}-{}\"]", (int)game.is_win_white(), (int)game.is_win_black()); 88 os << std::format("\n[Termination \"{}\"]", name[game.get_terminate()]); 89 if (game.fen != Game::startPosition) { 90 os << std::format("\n[SetUp \"1\"]"); 91 os << std::format("\n[FEN \"{}\"]", game.fen); 92 } 93 os << '\n'; 94 95 if (!game.list.size()) return os; 96 Board board(game.fen); 97 98 const Color side = board.get_side(); 99 if (side == BLACK) os << std::format("1. ... "); 100 for (int i = 0; i < game.list.size(); i++) { 101 if (i % 2 == side) os << std::format("{}. ", i / 2 + 1); 102 os << std::format("{} ", Game::san ? Game::to_san(board, game.list[i]) : (std::string)game.list[i]); 103 game.list[i].make(board); 104 } 105 106 return os; 107 }