+void cleanup_line_item_buffer();
+struct safe_buffer line_item_buffer = { NULL, 0, NULL, 0,
+ cleanup_line_item_buffer };
+
+void cleanup_concat_buffer();
+struct safe_buffer concat_buffer = { NULL, 0, NULL, 0, cleanup_concat_buffer };
+
+void cleanup_usertag_buffer();
+struct safe_buffer usertag_buffer = { NULL, 0, NULL, 0,
+ cleanup_usertag_buffer};
+