+unsigned nr_objects;
+
+/*
+ * Called only from check_object() after it verified this object
+ * is Ok.
+ */
+static void write_cached_object(struct object *obj)
+{
+ unsigned char sha1[20];
+ struct obj_buffer *obj_buf = lookup_object_buffer(obj);
+ if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), sha1) < 0)
+ die("failed to write object %s", sha1_to_hex(obj->sha1));
+ obj->flags |= FLAG_WRITTEN;
+}
+
+/*
+ * At the very end of the processing, write_rest() scans the objects
+ * that have reachability requirements and calls this function.
+ * Verify its reachability and validity recursively and write it out.
+ */
+static int check_object(struct object *obj, int type, void *data)
+{
+ if (!obj)
+ return 0;
+
+ if (obj->flags & FLAG_WRITTEN)
+ return 1;
+
+ if (type != OBJ_ANY && obj->type != type)
+ die("object type mismatch");
+
+ if (!(obj->flags & FLAG_OPEN)) {
+ unsigned long size;
+ int type = sha1_object_info(obj->sha1, &size);
+ if (type != obj->type || type <= 0)
+ die("object of unexpected type");
+ obj->flags |= FLAG_WRITTEN;
+ return 1;
+ }
+
+ if (fsck_object(obj, 1, fsck_error_function))
+ die("Error in object");
+ if (!fsck_walk(obj, check_object, 0))
+ die("Error on reachable objects of %s", sha1_to_hex(obj->sha1));
+ write_cached_object(obj);
+ return 1;
+}
+
+static void write_rest(void)
+{
+ unsigned i;
+ for (i = 0; i < nr_objects; i++)
+ check_object(obj_list[i].obj, OBJ_ANY, 0);
+}