-char **argsplit (char *, char **, int *);
-void argsplit_msgarg (struct msgs_array *, char *, char **);
-void argsplit_insert (struct msgs_array *, char *, char **);
+char **argsplit (char *, char **, int *) NONNULL(1, 2);
+void argsplit_msgarg (struct msgs_array *, char *, char **) NONNULL(1, 2, 3);
+void argsplit_insert (struct msgs_array *, char *, char **) NONNULL(1, 2, 3);