root / lab4 / .minix-src / include / sys / null.h @ 14
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/* $NetBSD: null.h,v 1.9 2010/07/06 11:56:20 kleink Exp $ */
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/*
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* Written by Klaus Klein <kleink@NetBSD.org>, December 22, 1999.
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* Public domain.
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*/
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#ifndef _SYS_NULL_H_
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#define _SYS_NULL_H_
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#ifndef NULL |
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#if !defined(__GNUG__) || __GNUG__ < 2 || (__GNUG__ == 2 && __GNUC_MINOR__ < 90) |
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#if !defined(__cplusplus)
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#define NULL ((void *)0) |
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#else
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#define NULL 0 |
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#endif /* !__cplusplus */ |
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#else
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#define NULL __null |
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#endif
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#endif
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#endif /* _SYS_NULL_H_ */ |