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Passing UndoInfo is not needed anymore when undoing the move

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We store it now in the same UndoInfo struct as 'previous'
field, so when doing a move we also know where to get
the previous info when undoing the back the move.

This is needed for future patches and is a nice cleanup anyway.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-02-22 17:49:52 +01:00
parent 1b0fee9b17
commit 9b257ba29d
3 changed files with 24 additions and 24 deletions
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26
src/position.cpp
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@@ -706,6 +706,7 @@ void Position::do_move(Move m, UndoInfo& u) {
// captured piece, which is taken care of later.
u = undoInfoUnion;
u.capture = NO_PIECE_TYPE;
previous = &u;
// Save the current key to the history[] array, in order to be able to
// detect repetition draws.
@@ -722,7 +723,7 @@ void Position::do_move(Move m, UndoInfo& u) {
if (move_is_castle(m))
do_castle_move(m);
else if (move_promotion(m))
do_promotion_move(m, u);
do_promotion_move(m);
else if (move_is_ep(m))
do_ep_move(m);
else
@@ -977,7 +978,7 @@ void Position::do_castle_move(Move m) {
/// UndoInfo object, which has been initialized in Position::do_move, is
/// used to store the captured piece (if any).
void Position::do_promotion_move(Move m, UndoInfo &u) {
void Position::do_promotion_move(Move m) {
Color us, them;
Square from, to;
@@ -1000,7 +1001,7 @@ void Position::do_promotion_move(Move m, UndoInfo &u) {
if (capture)
{
u.capture = capture;
previous->capture = capture;
do_capture_move(m, capture, them, to);
}
@@ -1156,7 +1157,7 @@ void Position::do_ep_move(Move m) {
/// important that Position::undo_move is called with the same move and UndoInfo
/// object as the earlier call to Position::do_move.
void Position::undo_move(Move m, const UndoInfo &u) {
void Position::undo_move(Move m) {
assert(is_ok());
assert(move_is_ok(m));
@@ -1166,19 +1167,19 @@ void Position::undo_move(Move m, const UndoInfo &u) {
// Restore information from our UndoInfo object (except the captured piece,
// which is taken care of later)
undoInfoUnion = u;
undoInfoUnion = *previous;
if (move_is_castle(m))
undo_castle_move(m);
else if (move_promotion(m))
undo_promotion_move(m, u);
undo_promotion_move(m);
else if (move_is_ep(m))
undo_ep_move(m);
else
{
Color us, them;
Square from, to;
PieceType piece, capture;
PieceType piece;
us = side_to_move();
them = opposite_color(us);
@@ -1208,8 +1209,6 @@ void Position::undo_move(Move m, const UndoInfo &u) {
pieceList[us][piece][index[to]] = from;
index[from] = index[to];
capture = u.capture;
if (capture)
{
assert(capture != KING);
@@ -1309,11 +1308,11 @@ void Position::undo_castle_move(Move m) {
/// function. The UndoInfo object, which has been initialized in
/// Position::do_move, is used to put back the captured piece (if any).
void Position::undo_promotion_move(Move m, const UndoInfo &u) {
void Position::undo_promotion_move(Move m) {
Color us, them;
Square from, to;
PieceType capture, promotion;
PieceType promotion;
assert(move_is_ok(m));
assert(move_promotion(m));
@@ -1357,8 +1356,6 @@ void Position::undo_promotion_move(Move m, const UndoInfo &u) {
pieceCount[us][promotion]--;
pieceCount[us][PAWN]++;
capture = u.capture;
if (capture)
{
assert(capture != KING);
@@ -1686,6 +1683,7 @@ void Position::clear() {
epSquare = SQ_NONE;
rule50 = 0;
gamePly = 0;
previous = NULL;
}
@@ -1939,7 +1937,7 @@ bool Position::has_mate_threat(Color c) {
if (is_mate())
result = true;
undo_move(mlist[i].move, u2);
undo_move(mlist[i].move);
}
// Undo null move, if necessary