[ltt-dev] [LTTV PATCH] Fix remaining warnings

[Mathieu Desnoyers]

* Alexandre Montplaisir (alexandre.montplaisir at polymtl.ca) wrote:
> On 11-01-25 07:59 PM, Mathieu Desnoyers wrote:
> > * Alexandre Montplaisir (alexandre.montplaisir at polymtl.ca) wrote:
> >> Add and check the return values of fscanf, fread and asprintf functions.
> >>
> >> That should be it! GCC 4.5 with -Wall doesn't report anything else.
> >>
> >> Signed-off-by: Alexandre Montplaisir <alexandre.montplaisir at polymtl.ca>
> >> ---
> >>  lttv/lttv/attribute.c           |    8 ++--
> >>  lttv/lttv/state.c               |   72 ++++++++++++++++++++++++---------------
> >>  lttv/modules/text/depanalysis.c |   23 +++++++++----
> >>  3 files changed, 64 insertions(+), 39 deletions(-)
> >>
> >> diff --git a/lttv/lttv/attribute.c b/lttv/lttv/attribute.c
> >> index 243fe02..3b09468 100644
> >> --- a/lttv/lttv/attribute.c
> >> +++ b/lttv/lttv/attribute.c
> >> @@ -487,13 +487,13 @@ lttv_attribute_read_xml(LttvAttribute *self, FILE *fp)
> >>  
> >>  	LttvAttribute *subtree;
> >>  
> >> -	fscanf(fp,"<ATTRS>");
> >> +	res = fscanf(fp, "<ATTRS>");
> > Is it me or you forgot to check res here ?
> 
> Yeah, I omitted it on purpose, since we're feeding it a literal anyway.
> The "res =", albeit useless, suppresses the warning.
> Would you rather have it check for res > 0 ?

Otherwise, the way to suppress that kind of warning, when you _know_ you
don't have to check them, is to do:

    (void) fscanf(fp, "<ATTRS>");

Mathieu

> 
> -- 
> Alexandre Montplaisir
> DORSAL lab,
> École Polytechnique de Montréal
> 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com