Re: [Qemu-devel] [PATCH v6 2/6] qapi: Introduce add-fd, remove-fd, query-fdsets

[Corey Bryant]

On 08/08/2012 04:52 AM, Stefan Hajnoczi wrote:
> On Tue, Aug 7, 2012 at 8:59 PM, Corey Bryant <address@hidden> wrote:
> > On 08/07/2012 02:16 PM, Stefan Hajnoczi wrote:
> > > On Fri, Aug 3, 2012 at 6:28 PM, Corey Bryant <address@hidden>
> > > wrote:
> > > > +    snprintf(fd_str, sizeof(fd_str), "%ld", fd);
> > > > +    qerror_report(QERR_FD_NOT_FOUND, fd_str);
> > >
> > >
> > > Why use an fd_str instead of passing an int64_t into the error
> > > message?  This also assumed sizeof(long) == 8, which isn't true on
> > > 32-bit hosts, so %ld should be %"PRId64".
> >
> >
> > Can I pass an int64_t into the message if it takes a string?
> >
> > I thought int64_t was a long long in 32-bit mode, but perhaps that's not
> > always the case?
>
> The PRId64 format specifier macro from the C standard hides this so
> you can pass int64_t values to printf()-style functions in a portable
> way.
>
> Stefan


Thanks, I'll use PRId64.

--
Regards,
Corey