Clarify the mapping of files to queenside

[stockfish] / src / types.h

diff --git a/src/types.h b/src/types.h
index 3559d72b5ee93627019d2f25043ec61f8fe07004..6af0368720313d4c8cb7260566a92726f5256daa 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -345,6 +345,11 @@ inline Score operator*(Score s, int i) {
   return result;
 }
 
   return result;
 }
 

+/// Multiplication of a Score by an boolean
+inline Score operator*(Score s, bool b) {
+  return Score(int(s) * int(b));
+}
+

 constexpr Color operator~(Color c) {
   return Color(c ^ BLACK); // Toggle color
 }
 constexpr Color operator~(Color c) {
   return Color(c ^ BLACK); // Toggle color
 }


@@ -361,6 +366,10 @@ constexpr Piece operator~(Piece pc) {
   return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
 }
 
   return Piece(pc ^ 8); // Swap color of piece B_KNIGHT -> W_KNIGHT
 }
 

+inline File map_to_queenside(File f) {
+  return std::min(f, File(FILE_H - f)); // Map files ABCDEFGH to files ABCDDCBA
+}
+

 constexpr CastlingRights operator&(Color c, CastlingRights cr) {
   return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
 }
 constexpr CastlingRights operator&(Color c, CastlingRights cr) {
   return CastlingRights((c == WHITE ? WHITE_CASTLING : BLACK_CASTLING) & cr);
 }


@@ -442,6 +451,10 @@ constexpr Move make_move(Square from, Square to) {
   return Move((from << 6) + to);
 }
 
   return Move((from << 6) + to);
 }
 

+constexpr Move reverse_move(Move m) {
+  return make_move(to_sq(m), from_sq(m));
+}
+

 template<MoveType T>
 constexpr Move make(Square from, Square to, PieceType pt = KNIGHT) {
   return Move(T + ((pt - KNIGHT) << 12) + (from << 6) + to);
 template<MoveType T>
 constexpr Move make(Square from, Square to, PieceType pt = KNIGHT) {
   return Move(T + ((pt - KNIGHT) << 12) + (from << 6) + to);