From ff211469bafcdc36c8964ae0a4b87ae277cef51a Mon Sep 17 00:00:00 2001
From: Marco Costalba <mcostalba@gmail.com>
Date: Sun, 19 Oct 2008 13:56:57 +0100
Subject: [PATCH] Templetize Position::xxx_attacks_square()

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---
 src/position.cpp | 22 +++++++++++-----------
 src/position.h   | 32 ++++++++------------------------
 2 files changed, 19 insertions(+), 35 deletions(-)

diff --git a/src/position.cpp b/src/position.cpp
index 200416c7..e1d05f61 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -408,11 +408,11 @@ bool Position::piece_attacks_square(Square f, Square t) const {
   switch(piece_on(f)) {
   case WP: return white_pawn_attacks_square(f, t);
   case BP: return black_pawn_attacks_square(f, t);
-  case WN: case BN: return knight_attacks_square(f, t);
-  case WB: case BB: return bishop_attacks_square(f, t);
-  case WR: case BR: return rook_attacks_square(f, t);
-  case WQ: case BQ: return queen_attacks_square(f, t);
-  case WK: case BK: return king_attacks_square(f, t);
+  case WN: case BN: return piece_attacks_square<KNIGHT>(f, t);
+  case WB: case BB: return piece_attacks_square<BISHOP>(f, t);
+  case WR: case BR: return piece_attacks_square<ROOK>(f, t);
+  case WQ: case BQ: return piece_attacks_square<QUEEN>(f, t);
+  case WK: case BK: return piece_attacks_square<KING>(f, t);
   default: return false;
   }
 
@@ -549,7 +549,7 @@ bool Position::move_is_check(Move m, Bitboard dcCandidates) const {
 
       switch(move_promotion(m)) {
       case KNIGHT:
-        return knight_attacks_square(to, ksq);
+        return piece_attacks_square<KNIGHT>(to, ksq);
       case BISHOP:
         return bit_is_set(bishop_attacks_bb(to, b), ksq);
       case ROOK:
@@ -670,11 +670,11 @@ bool Position::move_attacks_square(Move m, Square s) const {
   switch(piece_on(f)) {
   case WP: return white_pawn_attacks_square(t, s);
   case BP: return black_pawn_attacks_square(t, s);
-  case WN: case BN: return knight_attacks_square(t, s);
-  case WB: case BB: return bishop_attacks_square(t, s);
-  case WR: case BR: return rook_attacks_square(t, s);
-  case WQ: case BQ: return queen_attacks_square(t, s);
-  case WK: case BK: return king_attacks_square(t, s);
+  case WN: case BN: return piece_attacks_square<KNIGHT>(t, s);
+  case WB: case BB: return piece_attacks_square<BISHOP>(t, s);
+  case WR: case BR: return piece_attacks_square<ROOK>(t, s);
+  case WQ: case BQ: return piece_attacks_square<QUEEN>(t, s);
+  case WK: case BK: return piece_attacks_square<KING>(t, s);
   default: assert(false);
   }
 
diff --git a/src/position.h b/src/position.h
index bf9bba3d..4dcbbf76 100644
--- a/src/position.h
+++ b/src/position.h
@@ -213,14 +213,13 @@ public:
   Bitboard attacks_to(Square s) const;
   Bitboard attacks_to(Square s, Color c) const;
   bool is_check() const;
-  bool piece_attacks_square(Square f, Square t) const;
   bool white_pawn_attacks_square(Square f, Square t) const;
   bool black_pawn_attacks_square(Square f, Square t) const;
-  bool knight_attacks_square(Square f, Square t) const;
-  bool bishop_attacks_square(Square f, Square t) const;
-  bool rook_attacks_square(Square f, Square t) const;
-  bool queen_attacks_square(Square f, Square t) const;
-  bool king_attacks_square(Square f, Square t) const;
+
+  template<PieceType>
+  Bitboard piece_attacks_square(Square f, Square t) const; // Dispatch at compile-time
+
+  bool piece_attacks_square(Square f, Square t) const; // Dispatch at run-time
 
   // Properties of moves
   bool move_is_legal(Move m) const;
@@ -590,24 +589,9 @@ inline bool Position::black_pawn_attacks_square(Square f, Square t) const {
   return bit_is_set(pawn_attacks(BLACK, f), t);
 }
 
-inline bool Position::knight_attacks_square(Square f, Square t) const {
-  return bit_is_set(piece_attacks<KNIGHT>(f), t);
-}
-
-inline bool Position::bishop_attacks_square(Square f, Square t) const {
-  return bit_is_set(piece_attacks<BISHOP>(f), t);
-}
-
-inline bool Position::rook_attacks_square(Square f, Square t) const {
-  return bit_is_set(piece_attacks<ROOK>(f), t);
-}
-
-inline bool Position::queen_attacks_square(Square f, Square t) const {
-  return bit_is_set(piece_attacks<QUEEN>(f), t);
-}
-
-inline bool Position::king_attacks_square(Square f, Square t) const {
-  return bit_is_set(piece_attacks<KING>(f), t);
+template<PieceType Piece>
+Bitboard Position::piece_attacks_square(Square f, Square t) const {
+  return bit_is_set(piece_attacks<Piece>(f), t);
 }
 
 inline bool Position::pawn_is_passed(Color c, Square s) const {
-- 
2.39.2