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Cleanup handling of Delta enums

Browse Source 
Ispired by Rein's code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-07-15 11:19:49 +02:00
parent fbdabe2975
commit 9c8c0de538
2 changed files with 28 additions and 26 deletions
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10
src/position.cpp
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@@ -520,7 +520,7 @@ bool Position::pl_move_is_legal(Move m, Bitboard pinned) const {
{
Color them = opposite_color(us);
Square to = move_to(m);
Square capsq = to + Square(us == WHITE ? -8 : 8);
Square capsq = to + pawn_push(them);
Square ksq = king_square(us);
Bitboard b = occupied_squares();
@@ -930,7 +930,7 @@ void Position::do_move(Move m, StateInfo& newSt, const CheckInfo& ci, bool moveI
// Set en passant square, only if moved pawn can be captured
if ((to ^ from) == 16)
{
if (attacks_from<PAWN>(from + (us == WHITE ? DELTA_N : DELTA_S), us) & pieces(PAWN, them))
if (attacks_from<PAWN>(from + pawn_push(us), us) & pieces(PAWN, them))
{
st->epSquare = Square((int(from) + int(to)) / 2);
key ^= zobEp[st->epSquare];
@@ -1039,7 +1039,7 @@ void Position::do_capture_move(Key& key, PieceType capture, Color them, Square t
{
if (ep) // en passant ?
{
capsq = (them == BLACK)? (to - DELTA_N) : (to - DELTA_S);
capsq = to + pawn_push(them);
assert(to == st->epSquare);
assert(relative_rank(opposite_color(them), to) == RANK_6);
@@ -1262,7 +1262,7 @@ void Position::undo_move(Move m) {
Square capsq = to;
if (ep)
capsq = (us == WHITE)? (to - DELTA_N) : (to - DELTA_S);
capsq = to - pawn_push(us);
assert(st->capturedType != KING);
assert(!ep || square_is_empty(capsq));
@@ -1467,7 +1467,7 @@ int Position::see(Move m) const {
// Handle en passant moves
if (st->epSquare == to && piece_type(piece_on(from)) == PAWN)
{
Square capQq = (side_to_move() == WHITE ? to - DELTA_N : to - DELTA_S);
Square capQq = to - pawn_push(side_to_move());
assert(capturedType == PIECE_TYPE_NONE);
assert(piece_type(piece_on(capQq)) == PAWN);