Curtis L. Olson writes:
> gethostbyname() returns NULL if an error occured.
>
> Expressions such as (a = b + c) evaluate to whatever value is assigned
> to "a" so we can do things like
>
> if ( a = b + c ) {
> // a != 0
> } else {
> // a == 0
> }
>
> This is a little tricky, so if gethostbyname() fails, host_info will
> be assigned a value of NULL and the whole entire expression then
> evaluates to NULL so this should work (at least on systems that define
> NULL to be 0x00.)
>
Thanks, I see whats going on now. I don't particularly like it
though!
a = b + c;
if(a) {
...
} else {
...
}
seems like a much better construct to me - trading a touch of
consiseness (is that a word?) for complete clarity as to the authors
intent.
> That said, the entire NetworkOLK module is only half implimented, and
> not really useful at this point. We really need someone to come along
> and finish it, or perhaps reimpliment this functionality from scratch
> using the plib networking libs.
I must confess I wasn't looking at doing anything with NetworkOLK,
simply compiling with -Wall.
Cheers - Dave
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