Recursion in a DAG is generally a bad idea because it could be very
deep. Be defensive and avoid recursion in mark_parents_uninteresting()
and clear_commit_marks().
mark_parents_uninteresting() learns a trick from clear_commit_marks()
to avoid malloc() in (dorminant) single-parent case.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
commit.c | 13 +++++++++++--
revision.c | 45 +++++++++++++++++++++++++++++----------------
2 files changed, 40 insertions(+), 18 deletions(-)
diff --git a/commit.c b/commit.c
index 44bc96d..c7aefbf 100644
--- a/commit.c
+++ b/commit.c
@@ -421,7 +421,8 @@ struct commit *pop_most_recent_commit(struct commit_list **list,
return ret;
}
-void clear_commit_marks(struct commit *commit, unsigned int mark)
+static void clear_commit_marks_1(struct commit_list **plist,
+ struct commit *commit, unsigned int mark)
{
while (commit) {
struct commit_list *parents;
@@ -436,12 +437,20 @@ void clear_commit_marks(struct commit *commit, unsigned int mark)
return;
while ((parents = parents->next))
- clear_commit_marks(parents->item, mark);
+ commit_list_insert(parents->item, plist);
commit = commit->parents->item;
}
}
+void clear_commit_marks(struct commit *commit, unsigned int mark)
+{
+ struct commit_list *list = NULL;
+ commit_list_insert(commit, &list);
+ while (list)
+ clear_commit_marks_1(&list, pop_commit(&list), mark);
+}
+
void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark)
{
struct object *object;
diff --git a/revision.c b/revision.c
index 8764dde..7cc72fc 100644
--- a/revision.c
+++ b/revision.c
@@ -139,11 +139,32 @@ void mark_tree_uninteresting(struct tree *tree)
void mark_parents_uninteresting(struct commit *commit)
{
- struct commit_list *parents = commit->parents;
+ struct commit_list *parents = NULL, *l;
+
+ for (l = commit->parents; l; l = l->next)
+ commit_list_insert(l->item, &parents);
while (parents) {
struct commit *commit = parents->item;
- if (!(commit->object.flags & UNINTERESTING)) {
+ l = parents;
+ parents = parents->next;
+ free(l);
+
+ while (commit) {
+ /*
+ * A missing commit is ok iff its parent is marked
+ * uninteresting.
+ *
+ * We just mark such a thing parsed, so that when
+ * it is popped next time around, we won't be trying
+ * to parse it and get an error.
+ */
+ if (!has_sha1_file(commit->object.sha1))
+ commit->object.parsed = 1;
+
+ if (commit->object.flags & UNINTERESTING)
+ break;
+
commit->object.flags |= UNINTERESTING;
/*
@@ -154,21 +175,13 @@ void mark_parents_uninteresting(struct commit *commit)
* wasn't uninteresting), in which case we need
* to mark its parents recursively too..
*/
- if (commit->parents)
- mark_parents_uninteresting(commit);
- }
+ if (!commit->parents)
+ break;
- /*
- * A missing commit is ok iff its parent is marked
- * uninteresting.
- *
- * We just mark such a thing parsed, so that when
- * it is popped next time around, we won't be trying
- * to parse it and get an error.
- */
- if (!has_sha1_file(commit->object.sha1))
- commit->object.parsed = 1;
- parents = parents->next;
+ for (l = commit->parents->next; l; l = l->next)
+ commit_list_insert(l->item, &parents);
+ commit = commit->parents->item;
+ }
}
}
--
1.7.3.1.256.g2539c.dirty
--
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