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From: "Bertrand Augereau" <baugereau@ifrance.kom>
Newsgroups: comp.lang.ada
Subject: Re: Ada The Best Language?
Date: Fri, 20 Jul 2001 17:39:27 +0200
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Date: 2001-07-20T17:39:27+02:00
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> >
> >struct Head
> >{
> >    ...
> >    unsigned int offset1:5;
> >    unsigned int more_fragments :1;
> >    unsigned int dont_fragment : 1;
> >    unsigned int pad:1;
> >    ..
> >}
>
> What does "Head.more_fragments = (total - send)/packet_size;" mean?

It is an unsigned int affectation which is undefined if ((total -
send)/packet_size) is bigger than 1 bit, no?

>
> >But you have to ensure the previous elements of the structure make the
> >padding right.
>
> No problem. I can live with that (unfortunely, I can't remember the C++
> language definition specifying that all components must be not aligned but
> packed.)

I guess bitfields force packing, but I'm not sure. And my Stroustrup's not
there.
Else you got me and we have to rely on copmpiler specific stuff. I'll check.