perf callchain: Abstract callchain print function

This is a preparation to support for printing other type of callchain
value like count or period.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1447047946-1691-4-git-send-email-namhyung@kernel.org
[ renamed new _sprintf_ operation to _scnprintf_ ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 08cb220ba5ea..b948bd068966 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -805,6 +805,35 @@ char *callchain_list__sym_name(struct callchain_list *cl,
 	return bf;
 }
 
+char *callchain_node__scnprintf_value(struct callchain_node *node,
+				      char *bf, size_t bfsize, u64 total)
+{
+	double percent = 0.0;
+	u64 period = callchain_cumul_hits(node);
+
+	if (callchain_param.mode == CHAIN_FOLDED)
+		period = node->hit;
+	if (total)
+		percent = period * 100.0 / total;
+
+	scnprintf(bf, bfsize, "%.2f%%", percent);
+	return bf;
+}
+
+int callchain_node__fprintf_value(struct callchain_node *node,
+				 FILE *fp, u64 total)
+{
+	double percent = 0.0;
+	u64 period = callchain_cumul_hits(node);
+
+	if (callchain_param.mode == CHAIN_FOLDED)
+		period = node->hit;
+	if (total)
+		percent = period * 100.0 / total;
+
+	return percent_color_fprintf(fp, "%.2f%%", percent);
+}
+
 static void free_callchain_node(struct callchain_node *node)
 {
 	struct callchain_list *list, *tmp;