[Qemu-devel] Re: Registering buffers with a qdict

[Luiz Capitulino <lcapitulino@redhat.com>]

On Fri, 07 May 2010 16:21:13 +0200
Jan Kiszka <jan.kiszka@siemens.com> wrote:

> Luiz Capitulino wrote:
> > On Fri, 07 May 2010 13:45:03 +0200
> > Jan Kiszka <jan.kiszka@siemens.com> wrote:
> > 
> >> Hi Luiz,
> >>
> >> what is the recommended way of pushing larger buffers (up to 64K so far)
> >> into a qdict? QLIST of QINT (one per byte) looks a bit heavy. I thought
> >> about hex-encoding the content first (series of "%02X"), then
> >> registering it as QSTRING. Or should we introduce a new type, QBUFFER?
> > 
> >  I don't think that hex-encoding the contents is so bad if your use case is
> > very specific and isolated.
> 
> The focus will be first on visualizing the buffer (user_print), but who
> knows what happens once the services is also exposed via QMP.
> 
> > 
> >  On the other hand, I do prefer a QBuffer type, specially because we can
> > have buffer operations.
> 
> The q<type>.c files look sufficiently simply, guess I will add a buffer
> type. Still, hex-encoding is probably the best representation for QMP.

 Yes, either as a string or (as suggested by Markus) an array of numbers,
if you wish to expose this via QMP you (or any of us) will have to update
the parser to support it.