RE: [avr-libc-dev] Re: Request for cbrt() and strdup to be addedtolibc

[Weddington, Eric]

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Russell Shaw
> Sent: Sunday, June 22, 2008 8:48 PM
> Cc: address@hidden
> Subject: Re: [avr-libc-dev] Re: Request for cbrt() and strdup 
> to be addedtolibc
> 
> >>    if (copy == NULL)
> >>            return NULL;
> >>
> >> generates the same (or less) code.
> > 
> > Good catch. Regardless whether it generates the same code or not, it
> > should be compared to NULL anyway because one should never 
> rely on NULL
> > being zero. Since copy is a pointer, it should be compared 
> to NULL, and
> > not with a logical NOT operator.
> 
> http://c-faq.com/null/ptrtest.html
> 
> I always use "if(!copy)..."

That doesn't make it right.