In 4f3bd5606a (pack-bitmap: implement BLOB_NONE filtering, 2020-02-14),
filtering support for bitmaps was added for the 'LOFC_BLOB_NONE' filter.
In the future, we would like to add support for filters that behave as
if they exclude a certain type of object, for e.g., the tree depth
filter with depth 0.
To prepare for this, make some of the functions used for filtering more
generic, such as 'find_tip_blobs' and 'filter_bitmap_blob_none' so that
they can work over arbitrary object types.
To that end, create 'find_tip_objects' and
'filter_bitmap_exclude_type', and redefine the aforementioned functions
in terms of those.
Signed-off-by: Taylor Blau <me@xxxxxxxxxxxx>
---
pack-bitmap.c | 35 ++++++++++++++++++++++++-----------
1 file changed, 24 insertions(+), 11 deletions(-)
diff --git a/pack-bitmap.c b/pack-bitmap.c
index 49a8d10d0c..3693c9e62f 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -715,8 +715,9 @@ static int in_bitmapped_pack(struct bitmap_index *bitmap_git,
return 0;
}
-static struct bitmap *find_tip_blobs(struct bitmap_index *bitmap_git,
- struct object_list *tip_objects)
+static struct bitmap *find_tip_objects(struct bitmap_index *bitmap_git,
+ struct object_list *tip_objects,
+ enum object_type type)
{
struct bitmap *result = bitmap_new();
struct object_list *p;
@@ -724,7 +725,7 @@ static struct bitmap *find_tip_blobs(struct bitmap_index *bitmap_git,
for (p = tip_objects; p; p = p->next) {
int pos;
- if (p->item->type != OBJ_BLOB)
+ if (p->item->type != type)
continue;
pos = bitmap_position(bitmap_git, &p->item->oid);
@@ -737,9 +738,10 @@ static struct bitmap *find_tip_blobs(struct bitmap_index *bitmap_git,
return result;
}
-static void filter_bitmap_blob_none(struct bitmap_index *bitmap_git,
- struct object_list *tip_objects,
- struct bitmap *to_filter)
+static void filter_bitmap_exclude_type(struct bitmap_index *bitmap_git,
+ struct object_list *tip_objects,
+ struct bitmap *to_filter,
+ enum object_type type)
{
struct eindex *eindex = &bitmap_git->ext_index;
struct bitmap *tips;
@@ -747,18 +749,21 @@ static void filter_bitmap_blob_none(struct bitmap_index *bitmap_git,
eword_t mask;
uint32_t i;
+ if (type != OBJ_BLOB)
+ BUG("filter_bitmap_exclude_type: unsupported type '%d'", type);
+
/*
* The non-bitmap version of this filter never removes
- * blobs which the other side specifically asked for,
+ * objects which the other side specifically asked for,
* so we must match that behavior.
*/
- tips = find_tip_blobs(bitmap_git, tip_objects);
+ tips = find_tip_objects(bitmap_git, tip_objects, type);
/*
* We can use the blob type-bitmap to work in whole words
* for the objects that are actually in the bitmapped packfile.
*/
- for (i = 0, init_type_iterator(&it, bitmap_git, OBJ_BLOB);
+ for (i = 0, init_type_iterator(&it, bitmap_git, type);
i < to_filter->word_alloc && ewah_iterator_next(&mask, &it);
i++) {
if (i < tips->word_alloc)
@@ -773,7 +778,7 @@ static void filter_bitmap_blob_none(struct bitmap_index *bitmap_git,
*/
for (i = 0; i < eindex->count; i++) {
uint32_t pos = i + bitmap_git->pack->num_objects;
- if (eindex->objects[i]->type == OBJ_BLOB &&
+ if (eindex->objects[i]->type == type &&
bitmap_get(to_filter, pos) &&
!bitmap_get(tips, pos))
bitmap_unset(to_filter, pos);
@@ -782,6 +787,14 @@ static void filter_bitmap_blob_none(struct bitmap_index *bitmap_git,
bitmap_free(tips);
}
+static void filter_bitmap_blob_none(struct bitmap_index *bitmap_git,
+ struct object_list *tip_objects,
+ struct bitmap *to_filter)
+{
+ filter_bitmap_exclude_type(bitmap_git, tip_objects, to_filter,
+ OBJ_BLOB);
+}
+
static unsigned long get_size_by_pos(struct bitmap_index *bitmap_git,
uint32_t pos)
{
@@ -820,7 +833,7 @@ static void filter_bitmap_blob_limit(struct bitmap_index *bitmap_git,
eword_t mask;
uint32_t i;
- tips = find_tip_blobs(bitmap_git, tip_objects);
+ tips = find_tip_objects(bitmap_git, tip_objects, OBJ_BLOB);
for (i = 0, init_type_iterator(&it, bitmap_git, OBJ_BLOB);
i < to_filter->word_alloc && ewah_iterator_next(&mask, &it);
--
2.26.0.113.ge9739cdccc
