linux-kernel - Re: [PATCH 2/5] perf stat: Refactor the code to strip csv output with ltrim()

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Date:   Fri, 7 Apr 2017 12:06:01 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Taeung Song <treeze.taeung@...il.com>
Cc:     linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Wang Nan <wangnan0@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 2/5] perf stat: Refactor the code to strip csv output
 with ltrim()

Em Fri, Apr 07, 2017 at 11:24:18PM +0900, Taeung Song escreveu:
> To strip csv output, use ltrim() instead of
> just while loop and isspace() at print_metric_{only}_csv().

Applied.
 
> Cc: Andi Kleen <ak@...ux.intel.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
> ---
>  tools/perf/builtin-stat.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 2158ea1..868e086a 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -875,10 +875,7 @@ static void print_metric_csv(void *ctx,
>  		return;
>  	}
>  	snprintf(buf, sizeof(buf), fmt, val);
> -	vals = buf;
> -	while (isspace(*vals))
> -		vals++;
> -	ends = vals;
> +	ends = vals = ltrim(buf);
>  	while (isdigit(*ends) || *ends == '.')
>  		ends++;
>  	*ends = 0;
> @@ -950,10 +947,7 @@ static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
>  		return;
>  	unit = fixunit(tbuf, os->evsel, unit);
>  	snprintf(buf, sizeof buf, fmt, val);
> -	vals = buf;
> -	while (isspace(*vals))
> -		vals++;
> -	ends = vals;
> +	ends = vals = ltrim(buf);
>  	while (isdigit(*ends) || *ends == '.')
>  		ends++;
>  	*ends = 0;
> -- 
> 2.7.4