X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fdirection.h;h=0500840a4277ac02240755ebf899b4f335e4038c;hp=4ca264a0291ae5ed59deb21a7170444fcadab32b;hb=a5ae7fe26030bdd73a95fde3ebe841abfe84ec5e;hpb=74160ac60266f9e6824a5a6417d8a0ac8c0b39cf

diff --git a/src/direction.h b/src/direction.h
index 4ca264a0..0500840a 100644
--- a/src/direction.h
+++ b/src/direction.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 Marco Costalba
+  Copyright (C) 2008-2010 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
@@ -45,6 +45,8 @@ enum SignedDirection {
   SIGNED_DIR_NONE = 8
 };
 
+ENABLE_OPERATORS_ON(SignedDirection);
+
 
 ////
 //// Variables
@@ -58,14 +60,6 @@ extern uint8_t SignedDirectionTable[64][64];
 //// Inline functions
 ////
 
-inline void operator++ (Direction& d, int) {
-  d = Direction(int(d) + 1);
-}
-
-inline void operator++ (SignedDirection& d, int) {
-  d = SignedDirection(int(d) + 1);
-}
-
 inline Direction direction_between_squares(Square s1, Square s2) {
   return Direction(DirectionTable[s1][s2]);
 }
@@ -74,6 +68,13 @@ inline SignedDirection signed_direction_between_squares(Square s1, Square s2) {
   return SignedDirection(SignedDirectionTable[s1][s2]);
 }
 
+inline int direction_is_diagonal(Square s1, Square s2) {
+  return DirectionTable[s1][s2] & 2;
+}
+
+inline bool direction_is_straight(Square s1, Square s2) {
+  return DirectionTable[s1][s2] < 2;
+}
 
 ////
 //// Prototypes