#ifndef COMPASSROSE_H
#define COMPASSROSE_H
#include "constants.h"
namespace Napoleon
{
namespace CompassRose
{
/* northwest north northeast
noWe nort noEa
+7 +8 +9
\ | /
west -1 <- 0 -> +1 east
/ | \
-9 -8 -7
soWe sout soEa
southwest south southeast
*/
INLINE BitBoard OneStepSouth(BitBoard bitBoard) { return bitBoard >> 8; }
INLINE BitBoard OneStepNorth(BitBoard bitBoard) { return bitBoard << 8; }
INLINE BitBoard OneStepWest(BitBoard bitBoard) { return bitBoard >> 1 & Constants::NotHFile; }
INLINE BitBoard OneStepEast(BitBoard bitBoard) { return bitBoard << 1 & Constants::NotAFile; }
INLINE BitBoard OneStepNorthEast(BitBoard bitBoard) { return bitBoard << 9 & Constants::NotAFile; }
INLINE BitBoard OneStepNorthWest(BitBoard bitBoard) { return bitBoard << 7 & Constants::NotHFile; }
INLINE BitBoard OneStepSouthEast(BitBoard bitBoard) { return bitBoard >> 7 & Constants::NotAFile; }
INLINE BitBoard OneStepSouthWest(BitBoard bitBoard) { return bitBoard >> 9 & Constants::NotHFile; }
}
}
#endif // COMPASSROSE_H
