On Thu, Nov 12, 2009 at 10:46:47AM -0500, Mark Bucciarelli wrote:
> Hi,
>
> Part 1:
>
> How can I tell if casting a off_t (e.g, sb.st_size) to size_t risks
> an overflow?
>
You have to check for overflows:
if (sb.st_size > SIZE_MAX) {
/* error */
...
}
size = sb.st_size;
> What about casting ptrdiff_to to a uint64_t or a long?
>
same here
> The full table of all such possible integer type casts must be large
> (and full of dragons?). How do you all keep it straight?
>
I use the same type everywhere avoiding any conversions (and
checks).
-- Alexandre
