[Libguestfs] [libnbd PATCH 11/23] generator/C: print_trace_enter: break "enter" to a common new line

[Eric Blake]

On Tue, Apr 25, 2023 at 09:10:55AM +0200, Laszlo Ersek wrote:
> Going forward, we'd like to wrap long string literals. The recently
> introduced "pr_wrap_cstr" function may only be called right after the
> opening quote of the string literal has been produced. In the
> "print_trace_enter" function, we start a long string literal with
> "enter:"; however, because we either pass the literal to debug() or
> debug_direct(), this "enter:" is spelled out twice. Factor "enter:" out to
> a common line, also ensuring that we'll have as much room for wrapping as
> possible.
> 
> Example effect [lib/api.c]:
> 
> > @@ -6220,7 +6360,8 @@ nbd_supports_uri (struct nbd_handle *h)
> >
> >    /* This function must not call set_error. */
> >    if_debug (h) {
> > -    debug_direct (h, "nbd_supports_uri", "enter:");
> > +    debug_direct (h, "nbd_supports_uri",
> > +                  "enter:");
> >    }
> >
> >    ret = nbd_unlocked_supports_uri (h);
> > @@ -6260,7 +6401,8 @@ nbd_get_uri (struct nbd_handle *h)
> >
> >    pthread_mutex_lock (&h->lock);
> >    if_debug (h) {
> > -    debug (h, "enter:");
> > +    debug (h,
> > +           "enter:");

Looks a little funny to not wrap here; but it's generated code, and
the context above makes it obvious why it is easier to wrap in both
places (when the debug_direct call above has an obvious reason for
wrapping).  So far, I have no objections to this series, but I've hit
the end of my reviewing day.

For 1-11:

Reviewed-by: Eric Blake <eblake at redhat.com>

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org