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

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Message-Id: <1491575061-704-3-git-send-email-treeze.taeung@gmail.com>
Date:   Fri,  7 Apr 2017 23:24:18 +0900
From:   Taeung Song <treeze.taeung@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
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>,
        Taeung Song <treeze.taeung@...il.com>,
        Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 2/5] perf stat: Refactor the code to strip csv output with ltrim()

To strip csv output, use ltrim() instead of
just while loop and isspace() at print_metric_{only}_csv().

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