[RFC PATCH v2 22/22] blame: create entry prepend function in libgit

[Jeff Smith <whydoubt@gmail.com>]

Signed-off-by: Jeff Smith <whydoubt@gmail.com>
---
 blame.c         | 16 ++++++++++++++++
 blame.h         |  2 ++
 builtin/blame.c | 11 +----------
 3 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/blame.c b/blame.c
index f6c9cb7..00404b9 100644
--- a/blame.c
+++ b/blame.c
@@ -1845,3 +1845,19 @@ void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blam
 	if (orig)
 		*orig = o;
 }
+
+
+
+struct blame_entry *blame_entry_prepend(struct blame_entry *head,
+					long start, long end,
+					struct blame_origin *o)
+{
+	struct blame_entry *new_head = xcalloc(1, sizeof(struct blame_entry));
+	new_head->lno = start;
+	new_head->num_lines = end - start;
+	new_head->suspect = o;
+	new_head->s_lno = start;
+	new_head->next = head;
+	blame_origin_incref(o);
+	return new_head;
+}
diff --git a/blame.h b/blame.h
index 76fd8ef..a6c915c 100644
--- a/blame.h
+++ b/blame.h
@@ -170,4 +170,6 @@ extern const char *blame_nth_line(struct blame_scoreboard *sb, long lno);
 extern void init_scoreboard(struct blame_scoreboard *sb);
 extern void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blame_origin **orig);
 
+extern struct blame_entry *blame_entry_prepend(struct blame_entry *head, long start, long end, struct blame_origin *o);
+
 #endif /* BLAME_H */
diff --git a/builtin/blame.c b/builtin/blame.c
index 7ec5a73..8a858b0 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -890,16 +890,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 
 	for (range_i = ranges.nr; range_i > 0; --range_i) {
 		const struct range *r = &ranges.ranges[range_i - 1];
-		long bottom = r->start;
-		long top = r->end;
-		struct blame_entry *next = ent;
-		ent = xcalloc(1, sizeof(*ent));
-		ent->lno = bottom;
-		ent->num_lines = top - bottom;
-		ent->suspect = o;
-		ent->s_lno = bottom;
-		ent->next = next;
-		blame_origin_incref(o);
+		ent = blame_entry_prepend(ent, r->start, r->end, o);
 	}
 
 	o->suspects = ent;
-- 
2.9.3