/*
- 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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
- 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.
-
+
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
};
enum SignedDirection {
- SIGNED_DIR_E = 0, SIGNED_DIR_W = 1,
- SIGNED_DIR_N = 2, SIGNED_DIR_S = 3,
+ SIGNED_DIR_E = 0, SIGNED_DIR_W = 1,
+ SIGNED_DIR_N = 2, SIGNED_DIR_S = 3,
SIGNED_DIR_NE = 4, SIGNED_DIR_SW = 5,
SIGNED_DIR_NW = 6, SIGNED_DIR_SE = 7,
SIGNED_DIR_NONE = 8
};
+ENABLE_OPERATORS_ON(SignedDirection);
+
////
//// Variables
//// 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]);
}
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