Pan gmime-3 / Registering a callback function

Hi,

I'm having a look at this issue:

https://gitlab.gnome.org/GNOME/pan/issues/77

I want to register a callback function for GMimeParserOptions:

https://developer.gnome.org/gmime/stable/gmime-GMimeParserOptions.html#g-mime-parser-options-set-warning-callback

with:

g_mime_parser_options_set_warning_callback ()

Is it ok to define a function something like this:


  GMimeParserWarningFunc warning_cb (gint64 offset,
                                     GMimeParserWarning errcode,
                                     const gchar *item,
                                     gpointer user_data)
  {
    // do something with errcode
  }

// -----------

https://developer.gnome.org/gmime/stable/gmime-GMimeParserOptions.html#GMimeParserWarningFunc


How do I pass the callback function warning_cb correctly?

  gpointer user_data = NULL;
  GMimeParserOptions *gmpo  = g_mime_parser_options_new();
  g_mime_parser_options_set_warning_callback (gmpo, warning_cb, user_data);


Hoping someone has some advice for me.



Detlef