pack-bitmap: introduce `bitmap_writer_free()`

Now that there is clearer memory ownership around the bitmap_writer
structure, introduce a bitmap_writer_free() function that callers may
use to free any memory associated with their instance of the
bitmap_writer structure.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/pack-bitmap-write.c b/pack-bitmap-write.c
index 420f17c2e0..6cae670412 100644
--- a/pack-bitmap-write.c
+++ b/pack-bitmap-write.c
@@ -32,6 +32,29 @@ void bitmap_writer_init(struct bitmap_writer *writer)
 	memset(writer, 0, sizeof(struct bitmap_writer));
 }
 
+void bitmap_writer_free(struct bitmap_writer *writer)
+{
+	uint32_t i;
+
+	if (!writer)
+		return;
+
+	ewah_free(writer->commits);
+	ewah_free(writer->trees);
+	ewah_free(writer->blobs);
+	ewah_free(writer->tags);
+
+	kh_destroy_oid_map(writer->bitmaps);
+
+	for (i = 0; i < writer->selected_nr; i++) {
+		struct bitmapped_commit *bc = &writer->selected[i];
+		if (bc->write_as != bc->bitmap)
+			ewah_free(bc->write_as);
+		ewah_free(bc->bitmap);
+	}
+	free(writer->selected);
+}
+
 void bitmap_writer_show_progress(struct bitmap_writer *writer, int show)
 {
 	writer->show_progress = show;