+/* Call FUNCTION on each of the displays whose numbers are given in
+ ARGS. DATA is passed unmodified to FUNCTION. */
+
+static void
+map_display_numbers (char *args,
+ void (*function) (struct display *,
+ void *),
+ void *data)
+{
+ struct get_number_or_range_state state;
+ struct display *b, *tmp;
+ int num;
+
+ if (args == NULL)
+ error_no_arg (_("one or more display numbers"));
+
+ init_number_or_range (&state, args);
+
+ while (!state.finished)
+ {
+ char *p = state.string;
+
+ num = get_number_or_range (&state);
+ if (num == 0)
+ warning (_("bad display number at or near '%s'"), p);
+ else
+ {
+ struct display *d, *tmp;
+
+ ALL_DISPLAYS_SAFE (d, tmp)
+ if (d->number == num)
+ break;
+ if (d == NULL)
+ printf_unfiltered (_("No display number %d.\n"), num);
+ else
+ function (d, data);
+ }
+ }
+}
+
+/* Callback for map_display_numbers, that deletes a display. */
+
+static void
+do_delete_display (struct display *d, void *data)
+{
+ delete_display (d);
+}
+
+/* "undisplay" command. */