[libvirt] [PATCH v2 9/9] cpu-baseline command for virsh

[Daniel P. Berrange]

On Thu, Feb 11, 2010 at 09:37:58PM +0100, Daniel Veillard wrote:
> On Thu, Feb 11, 2010 at 08:49:54PM +0100, Jiri Denemark wrote:
> > > > +    if (virFileReadAll(from, VIRSH_MAX_XML_FILE, &buffer) < 0)
> > > > +        return FALSE;
> > > > +
> > > > +    p = buffer;
> > > > +    while ((p = strstr(p, "<cpu>"))) {
> > > > +        list = vshRealloc(ctl, list, sizeof(char *) * (count + 1));
> > > > +        list[count++] = p;
> > > > +
> > > > +        if ((p = strstr(p, "</cpu>"))) {
> > > > +            p += strlen("</cpu>");
> > > > +            if (*p != '\0') {
> > > > +                *p = '\0';
> > > > +                p++;
> > > > +            }
> > > > +        }
> > > > +    }
> > > 
> > >   Aye aye aye ...  I understand what you're trying to do but I think
> > > this is a bit weird  ... I think we should be able to come with an
> > > alternative, cleaner based on parsing the content as an XML well
> > > balanced fragment and then reserialize all cpu elements found.
> > >   Your scheme would explode for example if we tried to add a <cpu>
> > > element as one possible child of <cpu> or if we added attributes to
> > > <cpu>, it's too fragile. I can think the other parts can be commited
> > > independantly anyway.
> > 
> > Yeah, it's ugly but I wanted to avoid the complexity of parsing XML and
> > formating back to a string. And I still don't think it is a good idea. Maybe I
> 
>   Not that hard. The harder is to get libvirt to accept something like a
> concatenation
> 
> ----------------
> <cpu>
>   ...
> </cpu>
> <cpu>
>   ...
> </cpu>
> ----------------
> 
> But I know how to do it (nut never pretend it's XML :-)

Isn't there anyway to get the XML parser to stop processing input once it
has parsed one complete document, without consuming the rest of the data
in the file. eg

> <cpu>
>   ...
> </cpu>

Make it stop here ^^^

Then, invoke it again to parse the next document in the file

> <cpu>
>   ...
> </cpu>

And so on.... 


Daniel
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