Re: HELP ! need to insert value in array !!

[ok@goanna.cs.rmit.edu.au (Richard A. O'Keefe)]

dewar@merv.cs.nyu.edu (Robert Dewar) writes:

>Also, you did not answer my point about alignment. Suppose the array
>element type is one whose size is not a multiple of its alignment.

There is no such animal in C.  The size of every object *must* be a
multiple of its alignment.

>Or are you saying that the ANSI standard requires that the size be a
>multiple of the required alignment. If so, please quote chapter and
>verse.

My second copy of the C standard seems to have walked off, perhaps to
join its predecessor (wherever _that_ went).  But surely this is one
of the best known aspects of C?  It hasn't changed since Classic C and
is central to the way C pointer arithmetic works.  (Casting (long*) to
(char*) _is_ defined in standard C, by the way.  That's again part of
how pointer arithmetic is defined.)

>It would be useful to know whether you are talking about things that "everyone
>knows must be so", or things that are guaranteed to have the semantics you claim
>from the standard.

I have pruned the list of newsgroups and added comp.std.c, which was
unaccountably missing.


-- 
Four policemen playing jazz on an up escalator in the railway station.
Richard A. O'Keefe; http://www.cs.rmit.edu.au/%7Eok; RMIT Comp.Sci.