[Freeciv-Dev] Re: int -> void*, was Re: [RFC] Attaching information to objects

[David Pfitzner <dwpfitzner@xxxxxxxxx>]

Raimar Falke <hawk@xxxxxxxxxxxxxxxxxxxxxxx> wrote: 

> On Mon, Jan 15, 2001 at 03:11:08PM -0800, David Pfitzner wrote:

> > Is it guaranteed by the language that stuffing the int into the
> > void* will always work, or does it just happen to work on most
> > (all?) platforms?

> ISO/ANSI C99 added optional types intptr_t and uintptr_t. Pointers
> can be cast to these types and back without loss of information.
> IMHO they are expected to be used in weird places where pointers
> need to be stored together with integers

Well, I don't think Freeciv actually uses/requires C99 features
at this time :-)

Also this sounds like still a different problem, since it talks
of casting pointers to int and back, where we're interested in
casting arbitrary ints to pointers (specifically void*) and back.

-- David

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