list-objects-filter-options: create copy helper

As we add more embedded members with type 'struct list_objects_filter_options', it will be important to easily perform a deep copy across multiple such structs. Create list_objects_filter_copy() to satisfy this need. This method is recursive to match the recursive nature of the struct. Signed-off-by: Derrick Stolee <derrickstolee@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Derrick Stolee committed Mar 9, 2022 at 16:01 UTC 4a4c3f9b6389168033843814ad45e69bf0b92b1d
2 files changed +23
list-objects-filter-options.c
+19
@@ -415,3 +415,22 @@ void partial_clone_get_default_filter_spec(
415 &errbuf);
416 strbuf_release(&errbuf);
417 }
418 +
419 +void list_objects_filter_copy(
420 + struct list_objects_filter_options *dest,
421 + const struct list_objects_filter_options *src)
422 +{
423 + int i;
424 + struct string_list_item *item;
425 +
426 + /* Copy everything. We will overwrite the pointers shortly. */
427 + memcpy(dest, src, sizeof(struct list_objects_filter_options));
428 +
429 + string_list_init_dup(&dest->filter_spec);
430 + for_each_string_list_item(item, &src->filter_spec)
431 + string_list_append(&dest->filter_spec, item->string);
432 +
433 + ALLOC_ARRAY(dest->sub, dest->sub_alloc);
434 + for (i = 0; i < src->sub_nr; i++)
435 + list_objects_filter_copy(&dest->sub[i], &src->sub[i]);
436 +}
list-objects-filter-options.h
+4
@@ -132,4 +132,8 @@ void partial_clone_get_default_filter_spec(
132 struct list_objects_filter_options *filter_options,
133 const char *remote);
134
135 +void list_objects_filter_copy(
136 + struct list_objects_filter_options *dest,
137 + const struct list_objects_filter_options *src);
138 +
139 #endif /* LIST_OBJECTS_FILTER_OPTIONS_H */