perf tools: Introduce reset_output_field()

The reset_output_field() function is for clearing output field
settings and will be used for test code in later patch.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1400480762-22852-19-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 61cf31e094f3..4484f5bd1b14 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -459,6 +459,23 @@ next:
         }
 }
 
+void perf_hpp__reset_output_field(void)
+{
+        struct perf_hpp_fmt *fmt, *tmp;
+
+        /* reset output fields */
+        perf_hpp__for_each_format_safe(fmt, tmp) {
+                list_del_init(&fmt->list);
+                list_del_init(&fmt->sort_list);
+        }
+
+        /* reset sort keys */
+        perf_hpp__for_each_sort_list_safe(fmt, tmp) {
+                list_del_init(&fmt->list);
+                list_del_init(&fmt->sort_list);
+        }
+}
+
 /*
  * See hists__fprintf to match the column widths
  */