/* Glaurung, a UCI chess playing engine. Copyright (C) 2004-2008 Tord Romstad Glaurung 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, 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 . */ #if !defined(DIRECTION_H_INCLUDED) #define DIRECTION_H_INCLUDED //// //// Includes //// #include "square.h" #include "types.h" //// //// Types //// enum Direction { DIR_E = 0, DIR_N = 1, DIR_NE = 2, DIR_NW = 3, DIR_NONE = 4 }; enum SignedDirection { 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 }; //// //// Variables //// extern uint8_t DirectionTable[64][64]; 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]); } inline SignedDirection signed_direction_between_squares(Square s1, Square s2) { return SignedDirection(SignedDirectionTable[s1][s2]); } //// //// Prototypes //// extern void init_direction_table(); #endif // !defined(DIRECTION_H_INCLUDED)