[PATCH 4/6] perf tools: Introduce trim function

[Jiri Olsa <jolsa@kernel.org>]

To be used in cases for both sides trim.

Link: http://lkml.kernel.org/n/tip-7fuk01zwjefo0aoqo42co0vy@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/ui/browsers/hists.c | 3 +--
 tools/perf/ui/stdio/hist.c     | 3 +--
 tools/perf/util/util.h         | 5 +++++
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 4b9816555946..ba10c86cb56c 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1607,9 +1607,8 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
 
 			ret = fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
 			dummy_hpp.buf[ret] = '\0';
-			rtrim(dummy_hpp.buf);
 
-			start = ltrim(dummy_hpp.buf);
+			start = trim(dummy_hpp.buf);
 			ret = strlen(start);
 
 			if (start != dummy_hpp.buf)
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 7aff5acf3265..560eb47d56f9 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -569,9 +569,8 @@ static int print_hierarchy_header(struct hists *hists, struct perf_hpp *hpp,
 			first_col = false;
 
 			fmt->header(fmt, hpp, hists_to_evsel(hists));
-			rtrim(hpp->buf);
 
-			header_width += fprintf(fp, "%s", ltrim(hpp->buf));
+			header_width += fprintf(fp, "%s", trim(hpp->buf));
 		}
 	}
 
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 8298d607c738..3bf3de86d429 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -254,6 +254,11 @@ int hex2u64(const char *ptr, u64 *val);
 char *ltrim(char *s);
 char *rtrim(char *s);
 
+static inline char *trim(char *s)
+{
+	return ltrim(rtrim(s));
+}
+
 void dump_stack(void);
 void sighandler_dump_stack(int sig);
 
-- 
2.4.3