Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!mit-eddie!uw-beaver!milton!sumax!amc-gw!pilchuck!dataio!gtenmc!ravim
From: ravim@gtenmc.UUCP (Vox Populi)
Newsgroups: comp.lang.c
Subject: Re: NULL question not in FAQ
Message-ID: <1103@gtenmc.UUCP>
Date: 2 Apr 91 02:05:28 GMT
References: <1991Mar26.235643.4498@ux1.cso.uiuc.edu> <1991Mar27.194101.1685@grebyn.com>
Reply-To: ravim@gtenmc.UUCP (Ravi Kumar Mandava)
Organization: GTE Telecom, Inc.  Bothell, WA
Lines: 23

In article <1991Mar27.194101.1685@grebyn.com> ckp@grebyn.com (Checkpoint Technologies) writes:
 >In article <1991Mar26.235643.4498@ux1.cso.uiuc.edu> phil@ux1.cso.uiuc.edu (Phil Howard KA9WGN) writes:
 >>Given that the compiler is supposed to translate the constant "0" to the
 >>appropriate value for a NULL pointer on the machine type, how does one
 >>get a pointer value whose representation happens to be all zeroes, but
 >>is a non-NULL pointer?
 >
 >void some_func(void) {
 >	int **ip;
 >
 >	ip = (int **) calloc(sizeof(int *), 1);

The same result (getting a pointer value to be all null bytes) can also be
achieved by declaring the pointer variable to be either static or/and global,
since static/global variables are automatically initialized to zeroes.

	-	Ravi Mandava

-- 
**********************   #include <stddisclaimer.h>  **************************
Ravi Mandava			e-mail :	ravim@gtenmc.gtetele.com
					  or    ravim@gtenmc.UUCP
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