Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: Ian Collins <ian-news@hotmail.com>
Newsgroups: comp.lang.c
Subject: Re: Testing if a pointer is valid
Date: Mon, 19 Sep 2011 08:23:50 +1200
Lines: 15
Message-ID: <9dn2amFr5dU7@mid.individual.net>
References: <j5370i$1nv$1@speranza.aioe.org>	<485d26ed-8e0c-4ad2-92de-ac71961b75dd@17g2000yqv.googlegroups.com>	<j538ks$6ae$1@speranza.aioe.org> <j556ad$3fm$2@dont-email.me>	<j559ir$np9$1@speranza.aioe.org> <j55ikl$e68$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net nO25sHKl0tIjQN37pwY9/QqtmTlTXs+w2jtLjwkW6Hnc9ShqD0
Cancel-Lock: sha1:+ivaFRcQR/IZmbn011ryUaiPjFk=
User-Agent: Mozilla/5.0 (X11; U; SunOS i86pc; en-US; rv:1.9.2.9) Gecko/20101021 Lightning/1.0b2 Thunderbird/3.1.4
In-Reply-To: <j55ikl$e68$1@dont-email.me>
Xref: x330-a1.tempe.blueboxinc.net comp.lang.c:10444

On 09/19/11 08:00 AM, Kleuskes & Moos wrote:
> On Sun, 18 Sep 2011 19:25:49 +0200, jacob navia wrote:
>
>> You should have a way to avoid crashes because of malicious code that
>> feeds you a bad pointer isn't it?
>
> You should not be uncertain wether or not a pointer is valid or not. If
> you are, your design stinks. If you try to compensate by adding checks,
> your methodology stinks, too.

That's untrue.  How can a library designer know what a user will pass to 
one of their functions?

-- 
Ian Collins