list-objects-filter: put omits set in filter struct

The oidset *omits pointer must be accessed by the combine filter in a
type-agnostic way once the graph traversal is over. Store that pointer
in the general `filter` struct. This will be used in a follow-up patch
to implement the combine filter.

Signed-off-by: Matthew DeVore <matvore@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

list-objects-filter.c

@@ -33,18 +33,14 @@ struct filter {
 		struct object *obj,
 		const char *pathname,
 		const char *filename,
+		struct oidset *omits,
 		void *filter_data);
 
 	void (*free_fn)(void *filter_data);
 
 	void *filter_data;
-};
 
-/*
- * A filter for list-objects to omit ALL blobs from the traversal.
- * And to OPTIONALLY collect a list of the omitted OIDs.
- */
-struct filter_blobs_none_data {
+	/* If non-NULL, the filter collects a list of the omitted OIDs here. */
 	struct oidset *omits;
 };
 
@@ -54,10 +50,9 @@ static enum list_objects_filter_result filter_blobs_none(
 	struct object *obj,
 	const char *pathname,
 	const char *filename,
+	struct oidset *omits,
 	void *filter_data_)
 {
-	struct filter_blobs_none_data *filter_data = filter_data_;
-
 	switch (filter_situation) {
 	default:
 		BUG("unknown filter_situation: %d", filter_situation);
@@ -75,21 +70,16 @@ static enum list_objects_filter_result filter_blobs_none(
 		assert(obj->type == OBJ_BLOB);
 		assert((obj->flags & SEEN) == 0);
 
-		if (filter_data->omits)
-			oidset_insert(filter_data->omits, &obj->oid);
+		if (omits)
+			oidset_insert(omits, &obj->oid);
 		return LOFR_MARK_SEEN; /* but not LOFR_DO_SHOW (hard omit) */
 	}
 }
 
 static void filter_blobs_none__init(
-	struct oidset *omitted,
 	struct list_objects_filter_options *filter_options,
 	struct filter *filter)
 {
-	struct filter_blobs_none_data *d = xcalloc(1, sizeof(*d));
-	d->omits = omitted;
-
-	filter->filter_data = d;
 	filter->filter_object_fn = filter_blobs_none;
 	filter->free_fn = free;
 }
@@ -99,8 +89,6 @@ static void filter_blobs_none__init(
  * Can OPTIONALLY collect a list of the omitted OIDs.
  */
 struct filter_trees_depth_data {
-	struct oidset *omits;
-
 	/*
 	 * Maps trees to the minimum depth at which they were seen. It is not
 	 * necessary to re-traverse a tree at deeper or equal depths than it has
@@ -123,16 +111,16 @@ struct seen_map_entry {
 /* Returns 1 if the oid was in the omits set before it was invoked. */
 static int filter_trees_update_omits(
 	struct object *obj,
-	struct filter_trees_depth_data *filter_data,
+	struct oidset *omits,
 	int include_it)
 {
-	if (!filter_data->omits)
+	if (!omits)
 		return 0;
 
 	if (include_it)
-		return oidset_remove(filter_data->omits, &obj->oid);
+		return oidset_remove(omits, &obj->oid);
 	else
-		return oidset_insert(filter_data->omits, &obj->oid);
+		return oidset_insert(omits, &obj->oid);
 }
 
 static enum list_objects_filter_result filter_trees_depth(
@@ -141,6 +129,7 @@ static enum list_objects_filter_result filter_trees_depth(
 	struct object *obj,
 	const char *pathname,
 	const char *filename,
+	struct oidset *omits,
 	void *filter_data_)
 {
 	struct filter_trees_depth_data *filter_data = filter_data_;
@@ -165,7 +154,7 @@ static enum list_objects_filter_result filter_trees_depth(
 		return LOFR_ZERO;
 
 	case LOFS_BLOB:
-		filter_trees_update_omits(obj, filter_data, include_it);
+		filter_trees_update_omits(obj, omits, include_it);
 		return include_it ? LOFR_MARK_SEEN | LOFR_DO_SHOW : LOFR_ZERO;
 
 	case LOFS_BEGIN_TREE:
@@ -186,12 +175,12 @@ static enum list_objects_filter_result filter_trees_depth(
 			filter_res = LOFR_SKIP_TREE;
 		} else {
 			int been_omitted = filter_trees_update_omits(
-				obj, filter_data, include_it);
+				obj, omits, include_it);
 			seen_info->depth = filter_data->current_depth;
 
 			if (include_it)
 				filter_res = LOFR_DO_SHOW;
-			else if (filter_data->omits && !been_omitted)
+			else if (omits && !been_omitted)
 				/*
 				 * Must update omit information of children
 				 * recursively; they have not been omitted yet.
@@ -215,12 +204,10 @@ static void filter_trees_free(void *filter_data) {
 }
 
 static void filter_trees_depth__init(
-	struct oidset *omitted,
 	struct list_objects_filter_options *filter_options,
 	struct filter *filter)
 {
 	struct filter_trees_depth_data *d = xcalloc(1, sizeof(*d));
-	d->omits = omitted;
 	oidmap_init(&d->seen_at_depth, 0);
 	d->exclude_depth = filter_options->tree_exclude_depth;
 	d->current_depth = 0;
@@ -235,7 +222,6 @@ static void filter_trees_depth__init(
  * And to OPTIONALLY collect a list of the omitted OIDs.
  */
 struct filter_blobs_limit_data {
-	struct oidset *omits;
 	unsigned long max_bytes;
 };
 
@@ -245,6 +231,7 @@ static enum list_objects_filter_result filter_blobs_limit(
 	struct object *obj,
 	const char *pathname,
 	const char *filename,
+	struct oidset *omits,
 	void *filter_data_)
 {
 	struct filter_blobs_limit_data *filter_data = filter_data_;
@@ -282,24 +269,22 @@ static enum list_objects_filter_result filter_blobs_limit(
 		if (object_length < filter_data->max_bytes)
 			goto include_it;
 
-		if (filter_data->omits)
-			oidset_insert(filter_data->omits, &obj->oid);
+		if (omits)
+			oidset_insert(omits, &obj->oid);
 		return LOFR_MARK_SEEN; /* but not LOFR_DO_SHOW (hard omit) */
 	}
 
 include_it:
-	if (filter_data->omits)
-		oidset_remove(filter_data->omits, &obj->oid);
+	if (omits)
+		oidset_remove(omits, &obj->oid);
 	return LOFR_MARK_SEEN | LOFR_DO_SHOW;
 }
 
 static void filter_blobs_limit__init(
-	struct oidset *omitted,
 	struct list_objects_filter_options *filter_options,
 	struct filter *filter)
 {
 	struct filter_blobs_limit_data *d = xcalloc(1, sizeof(*d));
-	d->omits = omitted;
 	d->max_bytes = filter_options->blob_limit_value;
 
 	filter->filter_data = d;
@@ -337,7 +322,6 @@ struct frame {
 };
 
 struct filter_sparse_data {
-	struct oidset *omits;
 	struct exclude_list el;
 
 	size_t nr, alloc;
@@ -350,6 +334,7 @@ static enum list_objects_filter_result filter_sparse(
 	struct object *obj,
 	const char *pathname,
 	const char *filename,
+	struct oidset *omits,
 	void *filter_data_)
 {
 	struct filter_sparse_data *filter_data = filter_data_;
@@ -431,8 +416,8 @@ static enum list_objects_filter_result filter_sparse(
 		if (val < 0)
 			val = frame->defval;
 		if (val > 0) {
-			if (filter_data->omits)
-				oidset_remove(filter_data->omits, &obj->oid);
+			if (omits)
+				oidset_remove(omits, &obj->oid);
 			return LOFR_MARK_SEEN | LOFR_DO_SHOW;
 		}
 
@@ -446,8 +431,8 @@ static enum list_objects_filter_result filter_sparse(
 		 * Leave the LOFR_ bits unset so that if the blob appears
 		 * again in the traversal, we will be asked again.
 		 */
-		if (filter_data->omits)
-			oidset_insert(filter_data->omits, &obj->oid);
+		if (omits)
+			oidset_insert(omits, &obj->oid);
 
 		/*
 		 * Remember that at least 1 blob in this tree was
@@ -468,12 +453,10 @@ static void filter_sparse_free(void *filter_data)
 }
 
 static void filter_sparse_oid__init(
-	struct oidset *omitted,
 	struct list_objects_filter_options *filter_options,
 	struct filter *filter)
 {
 	struct filter_sparse_data *d = xcalloc(1, sizeof(*d));
-	d->omits = omitted;
 	if (add_excludes_from_blob_to_list(filter_options->sparse_oid_value,
 					   NULL, 0, &d->el) < 0)
 		die("could not load filter specification");
@@ -489,7 +472,6 @@ static void filter_sparse_oid__init(
 }
 
 typedef void (*filter_init_fn)(
-	struct oidset *omitted,
 	struct list_objects_filter_options *filter_options,
 	struct filter *filter);
 
@@ -522,7 +504,8 @@ struct filter *list_objects_filter__init(
 		return NULL;
 
 	filter = xcalloc(1, sizeof(*filter));
-	init_fn(omitted, filter_options, filter);
+	filter->omits = omitted;
+	init_fn(filter_options, filter);
 	return filter;
 }
 
@@ -537,6 +520,7 @@ enum list_objects_filter_result list_objects_filter__filter_object(
 	if (filter && (obj->flags & NOT_USER_GIVEN))
 		return filter->filter_object_fn(r, filter_situation, obj,
 						pathname, filename,
+						filter->omits,
 						filter->filter_data);
 	/*
 	 * No filter is active or user gave object explicitly. In this case,