files_ref_iterator_begin(): take a ref_store argument

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

refs.c

@@ -1157,7 +1157,7 @@ static int do_for_each_ref(const char *submodule, const char *prefix,
 	if (!refs)
 		return 0;
 
-	iter = files_ref_iterator_begin(submodule, prefix, flags);
+	iter = files_ref_iterator_begin(refs, prefix, flags);
 	iter = prefix_ref_iterator_begin(iter, prefix, trim);
 
 	return do_for_each_ref_iterator(iter, fn, cb_data);

refs/files-backend.c

@@ -1863,11 +1863,11 @@ static struct ref_iterator_vtable files_ref_iterator_vtable = {
 };
 
 struct ref_iterator *files_ref_iterator_begin(
-		const char *submodule,
+		struct ref_store *ref_store,
 		const char *prefix, unsigned int flags)
 {
 	struct files_ref_store *refs =
-		get_files_ref_store(submodule, "ref_iterator_begin");
+		files_downcast(ref_store, 1, "ref_iterator_begin");
 	struct ref_dir *loose_dir, *packed_dir;
 	struct ref_iterator *loose_iter, *packed_iter;
 	struct files_ref_iterator *iter;

refs/refs-internal.h

@@ -404,13 +404,15 @@ struct ref_iterator *prefix_ref_iterator_begin(struct ref_iterator *iter0,
 					       const char *prefix,
 					       int trim);
 
+struct ref_store;
+
 /*
  * Iterate over the packed and loose references in the specified
- * submodule that are within find_containing_dir(prefix). If prefix is
+ * ref_store that are within find_containing_dir(prefix). If prefix is
  * NULL or the empty string, iterate over all references in the
  * submodule.
  */
-struct ref_iterator *files_ref_iterator_begin(const char *submodule,
+struct ref_iterator *files_ref_iterator_begin(struct ref_store *ref_store,
 					      const char *prefix,
 					      unsigned int flags);
 
@@ -484,8 +486,6 @@ extern struct ref_iterator *current_ref_iter;
 int do_for_each_ref_iterator(struct ref_iterator *iter,
 			     each_ref_fn fn, void *cb_data);
 
-struct ref_store;
-
 /* refs backends */
 
 /*