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From: desj@brahms (David desJardins)
Newsgroups: comp.lang.c
Subject: Re: Determing alignment of (char *) pointer
Message-ID: <487@cartan.Berkeley.EDU>
Date: Fri, 5-Dec-86 19:20:13 EST
Article-I.D.: cartan.487
Posted: Fri Dec  5 19:20:13 1986
Date-Received: Sat, 6-Dec-86 03:11:34 EST
References: <1510@mit-trillian.MIT.EDU>
Sender: daemon@cartan.Berkeley.EDU
Reply-To: desj@brahms (David desJardins)
Organization: Math Dept. UC Berkeley
Lines: 16

In article <1510@mit-trillian.MIT.EDU> newman@athena.mit.edu (Ron Newman) writes:
>   char *p;
>
>   if ((long)p & 3) ...
>
>   if ((long)(p - (char *) 0) & 3) ...

   Why not use

	if (p != (char *) (long *) p) ... ?

   This should give you the relevant information (can a long be stored at
the location pointed to by p?) without any machine dependencies.  I suppose
on some (broken) compilers it might not work...

   -- David desJardins