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Change hidden checkers API

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After previous patch is no more needed to pass
the color, becuase it is always the side to move.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-07-16 09:56:34 +01:00
parent 4894231ff7
commit 69f4954df1
4 changed files with 22 additions and 25 deletions
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src/position.cpp
+16 -19
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@@ -78,12 +78,11 @@ namespace {
CheckInfo::CheckInfo(const Position& pos) {
Color us = pos.side_to_move();
Color them = opposite_color(us);
Color them = opposite_color(pos.side_to_move());
Square ksq = pos.king_square(them);
dcCandidates = pos.discovered_check_candidates(us);
pinned = pos.pinned_pieces(us);
pinned = pos.pinned_pieces();
dcCandidates = pos.discovered_check_candidates();
checkSq[PAWN] = pos.attacks_from<PAWN>(ksq, them);
checkSq[KNIGHT] = pos.attacks_from<KNIGHT>(ksq);
@@ -366,12 +365,12 @@ void Position::print(Move move) const {
/// discovery check against the enemy king.
template<bool FindPinned>
Bitboard Position::hidden_checkers(Color c) const {
Bitboard Position::hidden_checkers() const {
// Pinned pieces protect our king, dicovery checks attack the enemy king
Bitboard b, result = EmptyBoardBB;
Bitboard pinners = pieces(FindPinned ? opposite_color(c) : c);
Square ksq = king_square(FindPinned ? c : opposite_color(c));
Bitboard pinners = pieces(FindPinned ? opposite_color(sideToMove) : sideToMove);
Square ksq = king_square(FindPinned ? sideToMove : opposite_color(sideToMove));
// Pinners are sliders, that give check when candidate pinned is removed
pinners &= (pieces(ROOK, QUEEN) & RookPseudoAttacks[ksq])
@@ -382,7 +381,7 @@ Bitboard Position::hidden_checkers(Color c) const {
b = squares_between(ksq, pop_1st_bit(&pinners)) & occupied_squares();
// Only one bit set and is an our piece?
if (b && !(b & (b - 1)) && (b & pieces(c)))
if (b && !(b & (b - 1)) && (b & pieces(sideToMove)))
result |= b;
}
return result;
@@ -390,23 +389,21 @@ Bitboard Position::hidden_checkers(Color c) const {
/// Position:pinned_pieces() returns a bitboard of all pinned (against the
/// king) pieces for the given color. Note that checkersBB bitboard must
/// be already updated.
/// king) pieces for the side to move.
Bitboard Position::pinned_pieces(Color c) const {
Bitboard Position::pinned_pieces() const {
return hidden_checkers<true>(c);
return hidden_checkers<true>();
}
/// Position:discovered_check_candidates() returns a bitboard containing all
/// pieces for the given side which are candidates for giving a discovered
/// check. Contrary to pinned_pieces() here there is no need of checkersBB
/// to be already updated.
/// pieces for the side to move which are candidates for giving a discovered
/// check.
Bitboard Position::discovered_check_candidates(Color c) const {
Bitboard Position::discovered_check_candidates() const {
return hidden_checkers<false>(c);
return hidden_checkers<false>();
}
/// Position::attackers_to() computes a bitboard containing all pieces which
@@ -497,7 +494,7 @@ bool Position::pl_move_is_legal(Move m, Bitboard pinned) const {
assert(is_ok());
assert(move_is_ok(m));
assert(pinned == pinned_pieces(side_to_move()));
assert(pinned == pinned_pieces());
Color us = side_to_move();
Square from = move_from(m);
@@ -688,7 +685,7 @@ bool Position::move_gives_check(Move m, const CheckInfo& ci) const {
assert(is_ok());
assert(move_is_ok(m));
assert(ci.dcCandidates == discovered_check_candidates(side_to_move()));
assert(ci.dcCandidates == discovered_check_candidates());
assert(piece_color(piece_on(move_from(m))) == side_to_move());
Square from = move_from(m);