From: Al Viro <viro@ftp.linux.org.uk>
To: Morten Welinder <mwelinder@gmail.com>
Cc: linux-sparse@vger.kernel.org
Subject: Re: pointer arithmetics and casts
Date: Sat, 26 May 2007 04:43:55 +0100 [thread overview]
Message-ID: <20070526034354.GP4095@ftp.linux.org.uk> (raw)
In-Reply-To: <118833cc0705251814h9fffa39xc4a0f3f9e61242b9@mail.gmail.com>
On Fri, May 25, 2007 at 09:14:33PM -0400, Morten Welinder wrote:
> > BINOP[+]
> > <tree for p>
> > BINOP[*]
> > IMPLICIEDT_CAST[ptrdiff_t]
> > <tree for i>
> > VAL[sizeof(*p)]
>
> I don't think you want ptrdiff_t there. It isn't guaranteed to
> be big enough.
Only if you are allowed to have an array object with elements too far
for their addresses to be subtracted...
> size_t should do, though.
size_t is an unsigned type, so by definition it won't do...
next prev parent reply other threads:[~2007-05-26 3:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-25 21:23 pointer arithmetics and casts Al Viro
2007-05-25 22:00 ` Al Viro
2007-05-26 15:45 ` Al Viro
2007-05-26 1:14 ` Morten Welinder
2007-05-26 3:32 ` Derek M Jones
2007-05-26 4:16 ` Al Viro
2007-05-26 3:43 ` Al Viro [this message]
2007-05-26 3:44 ` Neil Booth
2007-05-26 4:22 ` Al Viro
2007-05-26 4:37 ` Neil Booth
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