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27 lines
643 B
C
27 lines
643 B
C
/*
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* Copyright 1995, University Corporation for Atmospheric Research
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* See top level COPYRIGHT file for copying and redistribution conditions.
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*/
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/* $Id: fbits.h,v 1.2 1995/05/26 20:46:46 davis Exp $ */
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#ifndef _FBITS_H_
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#define _FBITS_H_
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/*
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* Macros for dealing with flag bits.
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*/
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#define fSet(t, f) ((t) |= (f))
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#define fClr(t, f) ((t) &= ~(f))
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#define fIsSet(t, f) ((t) & (f))
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#define fMask(t, f) ((t) & ~(f))
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/*
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* Propositions
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*/
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/* a implies b */
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#define pIf(a,b) (!(a) || (b))
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/* a if and only if b, use == when it makes sense */
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#define pIff(a,b) (((a) && (b)) || (!(a) && !(b)))
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#endif /*!FBITS_H_*/
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