From: Wincent Colaiuta <win@wincent.com>
Date: Fri, 31 Aug 2007 10:52:42 GMT
Subject: Re: Buffer overflows
Message-ID: <BD9F3FD0-94EF-4182-A03B-B26B18544894@wincent.com>
In-Reply-To: <3f4fd2640708301534k40f07a1cva90a59d12ace6138@mail.gmail.com>

El 31/8/2007, a las 0:34, Reece Dunn escribió:

> As an example, do your safe API do null pointer checks. This is
> because strcpy, strlen and the like don't, which is one of the reasons
> why they are considered unsafe. But then, if you guarantee that you
> are not passing a null pointer to one of these API, why take the hit
> of the additional checks when you know that these are safe.

Do you really think that comparing a pointer to NULL is going to be a  
speed hit? I would imagine that on most architectures it boils down  
to one or two machine code instructions.

Cheers,
Wincent