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Change piece_attacks_square() API

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An extra argument let us simplify some code.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2009-02-17 12:00:05 +01:00
parent 9f5b709db7
commit 7013efce4e
4 changed files with 6 additions and 19 deletions
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19
src/position.cpp
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@@ -399,12 +399,12 @@ Bitboard Position::attacks_to(Square s) const {
/// Position::piece_attacks_square() tests whether the piece on square f
/// attacks square t.
bool Position::piece_attacks_square(Square f, Square t) const {
bool Position::piece_attacks_square(Piece p, Square f, Square t) const {
assert(square_is_ok(f));
assert(square_is_ok(t));
switch (piece_on(f))
switch (p)
{
case WP: return pawn_attacks_square(WHITE, f, t);
case BP: return pawn_attacks_square(BLACK, f, t);
@@ -427,24 +427,11 @@ bool Position::move_attacks_square(Move m, Square s) const {
assert(move_is_ok(m));
assert(square_is_ok(s));
bool is_attack;
Square f = move_from(m), t = move_to(m);
assert(square_is_occupied(f));
switch (piece_on(f))
{
case WP: is_attack = pawn_attacks_square(WHITE, t, s); break;
case BP: is_attack = pawn_attacks_square(BLACK, t, s); break;
case WN: case BN: is_attack = piece_attacks_square<KNIGHT>(t, s); break;
case WB: case BB: is_attack = piece_attacks_square<BISHOP>(t, s); break;
case WR: case BR: is_attack = piece_attacks_square<ROOK>(t, s); break;
case WQ: case BQ: is_attack = piece_attacks_square<QUEEN>(t, s); break;
case WK: case BK: is_attack = piece_attacks_square<KING>(t, s); break;
default: break;
}
if (is_attack)
if (piece_attacks_square(piece_on(f), t, s))
return true;
// Move the piece and scan for X-ray attacks behind it