linux-kernel - Re: [PATCH 4/5] perf tools: Add support for exclusive option

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Message-ID: <20141023202948.GK14687@kernel.org>
Date:	Thu, 23 Oct 2014 17:29:48 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Namhyung Kim <namhyung@...nel.org>, Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: Re: [PATCH 4/5] perf tools: Add support for exclusive option

Em Thu, Oct 23, 2014 at 02:05:08PM +0900, Masami Hiramatsu escreveu:
> (2014/10/23 0:15), Namhyung Kim wrote:
> > Some options cannot be used at the same time.  To handle such options
> > add a new PARSE_OPT_EXCLUSIVE flag and show error message if more than
> > one of them is used.
> 
> Looks useful for me :)
> 
> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> 
> I just have a comment below;
> 
> > @@ -360,19 +378,21 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
> >  		}
> >  
> >  		if (arg[1] != '-') {
> > -			ctx->opt = arg + 1;
> > +			ctx->opt = ++arg;
> >  			if (internal_help && *ctx->opt == 'h')
> >  				return usage_with_options_internal(usagestr, options, 0);
> >  			switch (parse_short_opt(ctx, options)) {
> >  			case -1:
> > -				return parse_options_usage(usagestr, options, arg + 1, 1);
> > +				return parse_options_usage(usagestr, options, arg, 1);
> >  			case -2:
> >  				goto unknown;
> > +			case -3:
> > +				goto exclusive;
> 
> BTW, it may be a time to define return error codes.

Yeah, this thing looks unnecessarily complicated :-\
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