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LibChess: Add optional ponder move to the BestMove command

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The BestMove command can now include an optional ponder token, with
the move that the engine would like to ponder on.
This commit is contained in:
Tim Ledbetter 2023-04-24 12:17:56 +01:00 • committed by Sam Atkins
parent c885df98da
commit 25778d07e9
2 changed files with 17 additions and 3 deletions
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15
Userland/Libraries/LibChess/UCICommand.cpp
View file

@ -311,8 +311,15 @@ ErrorOr<NonnullOwnPtr<BestMoveCommand>> BestMoveCommand::from_string(StringView
{
auto tokens = command.split_view(' ');
VERIFY(tokens[0] == "bestmove");
VERIFY(tokens.size() == 2);
return adopt_nonnull_own_or_enomem(new (nothrow) BestMoveCommand(Move(tokens[1])));
VERIFY(tokens.size() == 2 || tokens.size() == 4);
auto best_move = Move(tokens[1]);
Optional<Move> move_to_ponder;
if (tokens.size() == 4) {
VERIFY(tokens[2] == "ponder");
move_to_ponder = Move(tokens[3]);
}
return adopt_nonnull_own_or_enomem(new (nothrow) BestMoveCommand(best_move, move_to_ponder));
}
ErrorOr<String> BestMoveCommand::to_string() const
@ -320,6 +327,10 @@ ErrorOr<String> BestMoveCommand::to_string() const
StringBuilder builder;
TRY(builder.try_append("bestmove "sv));
TRY(builder.try_append(TRY(move().to_long_algebraic())));
if (move_to_ponder().has_value()) {
TRY(builder.try_append(" ponder "sv));
TRY(builder.try_append(TRY(move_to_ponder()->to_long_algebraic())));
}
TRY(builder.try_append('\n'));
return builder.to_string();
}

5
Userland/Libraries/LibChess/UCICommand.h
View file

@ -229,9 +229,10 @@ public:
class BestMoveCommand : public Command {
public:
explicit BestMoveCommand(Chess::Move move)
explicit BestMoveCommand(Chess::Move move, Optional<Chess::Move> move_to_ponder = {})
: Command(Command::Type::BestMove)
, m_move(::move(move))
, m_move_to_ponder(::move(move_to_ponder))
{
}
@ -240,9 +241,11 @@ public:
virtual ErrorOr<String> to_string() const override;
Chess::Move move() const { return m_move; }
Optional<Chess::Move> move_to_ponder() const { return m_move_to_ponder; }
private:
Chess::Move m_move;
Optional<Chess::Move> m_move_to_ponder;
};
class InfoCommand : public Command {