Re: Seg Fault on NULL strlen

[Patrice St-Gelais <patrice st-gelais oricom ca>]

Hi,

Check if "entry2" is defined the first time "on_entry1_changed" is executed.

Maybe the callback is activated when you initialize the value of entry1,
before creating entry2, or something like this.

If it's the case, inserting a test to get out of the callback if entry2 is
NULL, before casting it with GTK_EDITABLE, would solve the seg fault.  If I
understand your code and your explanation, "entry1" shouldn't be NULL at
this point, and should be equal to "editable" because "on_entry1_changed" is
connected to "entry1".

Regards,

Patrice St-Gelais
________________________________

Steve & Patti Getzinger a écrit :

> I am attempting to set sensitivity based on entries in 3 entry boxes. So
> basically the first is easy. I am hitting a func on changed of entry1 in
> the func I am doing an
>
> > void
> > on_entry1_changed                (GtkEditable     *editable,
> >                                         gpointer         user_data)
> > {
> >   if(strlen(gtk_editable_get_chars(GTK_EDITABLE(entry1),0,-1)) > 7)
> >         {
> >
> > if(strlen(gtk_editable_get_chars(GTK_EDITABLE(entry2),0,-1)) > 0)
>
> >                         {
> >                         gtk_widget_set_sensitive (button1, TRUE);
> >                         }
> >         }else{
> >                 gtk_widget_set_sensitive (button1, FALSE);
> >         }
> > }
>
> With this config it seg faults with:
>
> > (gdiald:16598): GLib-GObject-WARNING **: invalid cast from (NULL)
> > pointer to `GtkEditable'
> >
> > (gdiald:16598): Gtk-CRITICAL **: file gtkeditable.c: line 125
> > (gtk_editable_get_chars): assertion `GTK_IS_EDITABLE (editable)' failed
> > Segmentation fault
>
> I am assuming strlen returns NULL if there has been no entry made in
> entry2. How do I get around this one?
>
> TIA
> Steve
>
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