Unify pinned and discovery checks code

[stockfish] / src / movepick.h

diff --git a/src/movepick.h b/src/movepick.h
index df2012fe6fa0b67bbe2ade133744d39ab4b8b6e7..a835346db341b62c297c6f999247e561e9e570c6 100644 (file)
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -1,13 +1,14 @@
 /*
-  Glaurung, a UCI chess playing engine.
-  Copyright (C) 2004-2008 Tord Romstad
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+  Copyright (C) 2008 Marco Costalba
 
-  Glaurung is free software: you can redistribute it and/or modify
+  Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
   
-  Glaurung is distributed in the hope that it will be useful,
+  Stockfish is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
@@ -59,8 +60,7 @@ public:
     PH_STOP
   };
 
-  MovePicker(Position &p, bool pvnode, Move ttm, Move mk, Move k1, Move k2,
-             Depth dpth);
+  MovePicker(const Position& p, bool pvnode, Move ttm, Move mk, Move k1, Move k2, Depth d);
   Move get_next_move();
   Move get_next_move(Lock &lock);
   int number_of_moves() const;
@@ -76,8 +76,9 @@ private:
   void score_evasions();
   void score_qcaptures();
   Move pick_move_from_list();
+  int find_best_index();
   
-  Position *pos;
+  const Position& pos;
   Move ttMove, mateKiller, killer1, killer2;
   Bitboard pinned, dc;
   MoveStack moves[256], badCaptures[64];
@@ -94,6 +95,15 @@ private:
 //// Inline functions
 ////
 
+/// MovePicker::number_of_moves() simply returns the numOfMoves member
+/// variable. It is intended to be used in positions where the side to move
+/// is in check, for detecting checkmates or situations where there is only
+/// a single reply to check.
+
+inline int MovePicker::number_of_moves() const {
+  return numOfMoves;
+}
+
 /// MovePicker::discovered_check_candidates() returns a bitboard containing
 /// all pieces which can possibly give discovered check.  This bitboard is
 /// computed by the constructor function.