Merge branch 'rs/commit-list-append'

There is no need for "commit_list_reverse()" function that only invites
inefficient code.

By René Scharfe
* rs/commit-list-append:
  commit: remove commit_list_reverse()
  revision: append to list instead of insert and reverse
  sequencer: export commit_list_append()

1 files changed, 27 insertions, 15 deletions

diff --git a/commit.c b/commit.c
index b80a45281..9ed36c7db 100644
--- a/commit.c
+++ b/commit.c
@@ -361,21 +361,6 @@ struct commit_list *commit_list_insert(struct commit *item, struct commit_list *
 	return new_list;
 }
 
-void commit_list_reverse(struct commit_list **list_p)
-{
-	struct commit_list *prev = NULL, *curr = *list_p, *next;
-
-	if (!list_p)
-		return;
-	while (curr) {
-		next = curr->next;
-		curr->next = prev;
-		prev = curr;
-		curr = next;
-	}
-	*list_p = prev;
-}
-
 unsigned commit_list_count(const struct commit_list *l)
 {
 	unsigned c = 0;
@@ -1214,3 +1199,30 @@ struct commit *get_merge_parent(const char *name)
 	}
 	return commit;
 }
+
+/*
+ * Append a commit to the end of the commit_list.
+ *
+ * next starts by pointing to the variable that holds the head of an
+ * empty commit_list, and is updated to point to the "next" field of
+ * the last item on the list as new commits are appended.
+ *
+ * Usage example:
+ *
+ *     struct commit_list *list;
+ *     struct commit_list **next = &list;
+ *
+ *     next = commit_list_append(c1, next);
+ *     next = commit_list_append(c2, next);
+ *     assert(commit_list_count(list) == 2);
+ *     return list;
+ */
+struct commit_list **commit_list_append(struct commit *commit,
+					struct commit_list **next)
+{
+	struct commit_list *new = xmalloc(sizeof(struct commit_list));
+	new->item = commit;
+	*next = new;
+	new->next = NULL;
+	return &new->next;
+}