83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
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Glaurung, a UCI chess playing engine.
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Copyright (C) 2004-2008 Tord Romstad
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Glaurung is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Glaurung is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(DIRECTION_H_INCLUDED)
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#define DIRECTION_H_INCLUDED
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////
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//// Includes
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////
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#include "square.h"
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#include "types.h"
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////
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//// Types
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////
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enum Direction {
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DIR_E = 0, DIR_N = 1, DIR_NE = 2, DIR_NW = 3, DIR_NONE = 4
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};
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enum SignedDirection {
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SIGNED_DIR_E = 0, SIGNED_DIR_W = 1,
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SIGNED_DIR_N = 2, SIGNED_DIR_S = 3,
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SIGNED_DIR_NE = 4, SIGNED_DIR_SW = 5,
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SIGNED_DIR_NW = 6, SIGNED_DIR_SE = 7,
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SIGNED_DIR_NONE = 8
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};
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////
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//// Variables
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////
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extern uint8_t DirectionTable[64][64];
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extern uint8_t SignedDirectionTable[64][64];
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////
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//// Inline functions
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////
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inline void operator++ (Direction &d, int) { d = Direction(int(d) + 1); }
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inline void operator++ (SignedDirection &d, int) {
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d = SignedDirection(int(d) + 1);
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}
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inline Direction direction_between_squares(Square s1, Square s2) {
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return Direction(DirectionTable[s1][s2]);
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}
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inline SignedDirection signed_direction_between_squares(Square s1, Square s2) {
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return SignedDirection(SignedDirectionTable[s1][s2]);
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}
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////
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//// Prototypes
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////
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extern void init_direction_table();
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#endif // !defined(DIRECTION_H_INCLUDED)
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