Null.hpp Source File

00001 /*==========================================================================
00002  * Copyright (c) 2001 Carnegie Mellon University.  All Rights Reserved.
00003  *
00004  * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
00005  * is subject to the terms of the software license set forth in the LICENSE
00006  * file included with this software, and also available at
00007  * http://www.cs.cmu.edu/~lemur/license.html
00008  *
00009  *==========================================================================
00010 */
00011 
00012 
00013 #ifndef _NULLH_
00014 #define _NULLH_
00015 
00016 #ifndef NULL
00017 #define NULL ((void *)0)
00018 #endif
00019 
00020 inline void *NULLADDR() { return ((void *)0); }
00021 
00022 #define nonNull(x) (&x != NULLADDR())
00023 #define Null(x) (&(x) == NULLADDR())
00024 #define null(Type) (*(Type *)NULLADDR())
00025 
00026 #endif