Introduce piece_moved() to simplify common code

[stockfish] / src / position.h

diff --git a/src/position.h b/src/position.h
index ba49b82bd91fcc954fc2524344f671c519e132e4..634fbc0d42ab680ada6b6569a70adf8d0aec7c5f 100644 (file)
--- a/src/position.h
+++ b/src/position.h
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2012 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -37,6 +37,7 @@ struct CheckInfo {
   Bitboard dcCandidates;
   Bitboard pinned;
   Bitboard checkSq[8];
+  Square ksq;
 };
 
 
@@ -100,6 +101,7 @@ public:
 
   // The piece on a given square
   Piece piece_on(Square s) const;
+  Piece piece_moved(Move m) const;
   bool square_is_empty(Square s) const;
 
   // Side to move
@@ -277,6 +279,10 @@ inline Piece Position::piece_on(Square s) const {
   return board[s];
 }
 
+inline Piece Position::piece_moved(Move m) const {
+  return board[from_sq(m)];
+}
+
 inline bool Position::square_is_empty(Square s) const {
   return board[s] == NO_PIECE;
 }
@@ -428,8 +434,8 @@ inline Value Position::non_pawn_material(Color c) const {
 
 inline bool Position::is_passed_pawn_push(Move m) const {
 
-  return   board[move_from(m)] == make_piece(sideToMove, PAWN)
-        && pawn_is_passed(sideToMove, move_to(m));
+  return   board[from_sq(m)] == make_piece(sideToMove, PAWN)
+        && pawn_is_passed(sideToMove, to_sq(m));
 }
 
 inline int Position::startpos_ply_counter() const {
@@ -454,14 +460,14 @@ inline bool Position::is_chess960() const {
 inline bool Position::is_capture_or_promotion(Move m) const {
 
   assert(is_ok(m));
-  return is_special(m) ? !is_castle(m) : !square_is_empty(move_to(m));
+  return is_special(m) ? !is_castle(m) : !square_is_empty(to_sq(m));
 }
 
 inline bool Position::is_capture(Move m) const {
 
   // Note that castle is coded as "king captures the rook"
   assert(is_ok(m));
-  return (!square_is_empty(move_to(m)) && !is_castle(m)) || is_enpassant(m);
+  return (!square_is_empty(to_sq(m)) && !is_castle(m)) || is_enpassant(m);
 }
 
 inline PieceType Position::captured_piece_type() const {