/*------------------------------------------------------------------------- * * sdir.h *	  POSTGRES scan direction definitions. * * * Copyright (c) 1994, Regents of the University of California * * $Id: sdir.h,v 1.6 1999/05/25 16:13:34 momjian Exp $ * *------------------------------------------------------------------------- */#ifndef SDIR_H#define SDIR_H/* * ScanDirection was an int8 for no apparent reason. I kept the original * values because I'm not sure if I'll break anything otherwise.  -ay 2/95 */typedef enum ScanDirection{	BackwardScanDirection = -1,	NoMovementScanDirection = 0,	ForwardScanDirection = 1} ScanDirection;/* * ScanDirectionIsValid *		True iff scan direction is valid. */#define ScanDirectionIsValid(direction) \	((bool) (BackwardScanDirection <= direction && \			 direction <= ForwardScanDirection))/* * ScanDirectionIsBackward *		True iff scan direction is backward. */#define ScanDirectionIsBackward(direction) \	((bool) (direction == BackwardScanDirection))/* * ScanDirectionIsNoMovement *		True iff scan direction indicates no movement. */#define ScanDirectionIsNoMovement(direction) \	((bool) (direction == NoMovementScanDirection))/* * ScanDirectionIsForward *		True iff scan direction is forward. */#define ScanDirectionIsForward(direction) \	((bool) (direction == ForwardScanDirection))#endif	 /* SDIR_H */