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Subject[PATCH 11/23] perf hists: Add helper functions for hierarchy mode
Date
The rb_hierarchy_{next,prev,last} functions are to traverse all
hist entries in a hierarchy. They will be used by various function
which supports hierarchy output.

Acked-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/hist.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/hist.h | 4 ++++
2 files changed, 50 insertions(+)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index c00183558e22..def0120d57ab 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1440,6 +1440,7 @@ static void output_resort(struct hists *hists, struct ui_progress *prog,
}
}

+
void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *prog)
{
bool use_callchain;
@@ -1457,6 +1458,51 @@ void hists__output_resort(struct hists *hists, struct ui_progress *prog)
output_resort(hists, prog, symbol_conf.use_callchain);
}

+struct rb_node *rb_hierarchy_last(struct rb_node *node)
+{
+ struct hist_entry *he = rb_entry(node, struct hist_entry, rb_node);
+
+ while (he->unfolded && !he->leaf) {
+ node = rb_last(&he->hroot_out);
+ he = rb_entry(node, struct hist_entry, rb_node);
+ }
+ return node;
+}
+
+struct rb_node *rb_hierarchy_next(struct rb_node *node)
+{
+ struct hist_entry *he = rb_entry(node, struct hist_entry, rb_node);
+
+ if (!he->leaf && he->unfolded)
+ node = rb_first(&he->hroot_out);
+ else
+ node = rb_next(node);
+
+ while (node == NULL) {
+ he = he->parent_he;
+ if (he == NULL)
+ break;
+
+ node = rb_next(&he->rb_node);
+ }
+ return node;
+}
+
+struct rb_node *rb_hierarchy_prev(struct rb_node *node)
+{
+ struct hist_entry *he = rb_entry(node, struct hist_entry, rb_node);
+
+ node = rb_prev(node);
+ if (node)
+ return rb_hierarchy_last(node);
+
+ he = he->parent_he;
+ if (he == NULL)
+ return NULL;
+
+ return &he->rb_node;
+}
+
static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *h,
enum hist_filter filter)
{
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index b86c98c6dffd..adfc9931e186 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -410,4 +410,8 @@ int perf_hist_config(const char *var, const char *value);

void perf_hpp_list__init(struct perf_hpp_list *list);

+struct rb_node *rb_hierarchy_last(struct rb_node *node);
+struct rb_node *rb_hierarchy_next(struct rb_node *node);
+struct rb_node *rb_hierarchy_prev(struct rb_node *node);
+
#endif /* __PERF_HIST_H */
--
2.7.0
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