[PATCH v4 1/3] object: add object_array initializer helper function

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The object_array API has an OBJECT_ARRAY_INIT macro, but lacks a
function to initialize an object_array at a given location in memory.

Introduce `object_array_init()` to implement such a function.

Signed-off-by: Taylor Blau <me@xxxxxxxxxxxx>
---
 object.c | 6 ++++++
 object.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/object.c b/object.c
index 6d4ef1524d..f1adb458b6 100644
--- a/object.c
+++ b/object.c
@@ -356,6 +356,12 @@ void object_list_free(struct object_list **list)
  */
 static char object_array_slopbuf[1];
 
+void object_array_init(struct object_array *array)
+{
+	struct object_array blank = OBJECT_ARRAY_INIT;
+	memcpy(array, &blank, sizeof(*array));
+}
+
 void add_object_array_with_path(struct object *obj, const char *name,
 				struct object_array *array,
 				unsigned mode, const char *path)
diff --git a/object.h b/object.h
index 5871615fee..114d45954d 100644
--- a/object.h
+++ b/object.h
@@ -58,6 +58,8 @@ struct object_array {
 
 #define OBJECT_ARRAY_INIT { 0 }
 
+void object_array_init(struct object_array *array);
+
 /*
  * object flag allocation:
  * revision.h:               0---------10         15             23------27
-- 
2.41.0.3.gb80d17c938




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