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position: refactor: Move do_move() and undo_move()

This commit is contained in:
Calcitem 2020-09-02 22:51:59 +08:00
parent 655d4cabce
commit 697c5aba59
1 changed files with 69 additions and 64 deletions
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133
src/position.cpp
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@ -329,6 +329,75 @@ const string Position::fen() const
return "";
}
/// Position::do_move() makes a move, and saves all information necessary
/// to a StateInfo object. The move is assumed to be legal. Pseudo-legal
/// moves should be filtered out before this function is called.
bool Position::do_move(Move m)
{
MoveType mt = type_of(m);
switch (mt) {
case MOVETYPE_REMOVE:
return remove_piece(static_cast<Square>(-m));
case MOVETYPE_MOVE:
return move_piece(from_sq(m), to_sq(m));
case MOVETYPE_PLACE:
return put_piece(to_sq(m));
default:
break;
}
return false;
}
/// Position::undo_move() unmakes a move. When it returns, the position should
/// be restored to exactly the same state as before the move was made.
bool Position::undo_move(Move m)
{
bool ret = false;
#if 0
MoveType mt = type_of(m);
switch (mt) {
case MOVETYPE_REMOVE:
return put_piece(to_sq(-m));
case MOVETYPE_MOVE:
if (select_piece(to_sq(m))) {
return put_piece(from_sq(m));
}
break;
case MOVETYPE_PLACE:
return remove_piece(static_cast<Square>(m));
default:
break;
}
// Finally point our state pointer back to the previous state
st = st->previous;
--gamePly;
//assert(pos_is_ok()); // TODO
#endif
// TODO: Adjust
//int pieceCountInHand[COLOR_NB]{ 0 };
//int pieceCountOnBoard[COLOR_NB]{ 0 };
//int pieceCountNeedRemove{ 0 };
m = m;
return ret;
}
void Position::undo_move(Stack<Position> &ss)
{
memcpy(this, ss.top(), sizeof(Position));
ss.pop();
}
int Position::pieces_on_board_count()
{
pieceCountOnBoard[BLACK] = pieceCountOnBoard[WHITE] = 0;
@ -859,70 +928,6 @@ bool Position::command(const char *cmd)
return false;
}
bool Position::do_move(Move m)
{
MoveType mt = type_of(m);
switch (mt) {
case MOVETYPE_REMOVE:
return remove_piece(static_cast<Square>(-m));
case MOVETYPE_MOVE:
return move_piece(from_sq(m), to_sq(m));
case MOVETYPE_PLACE:
return put_piece(to_sq(m));
default:
break;
}
return false;
}
/// Position::undo_move() unmakes a move. When it returns, the position should
/// be restored to exactly the same state as before the move was made.
bool Position::undo_move(Move m)
{
bool ret = false;
#if 0
MoveType mt = type_of(m);
switch (mt) {
case MOVETYPE_REMOVE:
return put_piece(to_sq(-m));
case MOVETYPE_MOVE:
if (select_piece(to_sq(m))) {
return put_piece(from_sq(m));
}
break;
case MOVETYPE_PLACE:
return remove_piece(static_cast<Square>(m));
default:
break;
}
// Finally point our state pointer back to the previous state
st = st->previous;
--gamePly;
//assert(pos_is_ok()); // TODO
#endif
// TODO: Adjust
//int pieceCountInHand[COLOR_NB]{ 0 };
//int pieceCountOnBoard[COLOR_NB]{ 0 };
//int pieceCountNeedRemove{ 0 };
m = m;
return ret;
}
void Position::undo_move(Stack<Position> &ss)
{
memcpy(this, ss.top(), sizeof(Position));
ss.pop();
}
Color Position::get_winner() const
{
return winner;