Re: g_list behavior: what am I doing wrong?

[Christopher Anderson <sidewinder asu gmail com>]

Ah, I see. Thanks for showing that pitfall, I could easily have done
the same thing.

Cheers,
Chris Anderson

On 7/14/05, Allin Cottrell <cottrell wfu edu> wrote:
> On Thu, 14 Jul 2005, Christopher Anderson wrote:
>
> > I am curious, could you explain your solution?
>
> OK, at the cost of some embarrassment ;-)
>
> Quoting my test function:
>
> int main (void)
> {
>       GList *list = NULL;
>
>       list = g_list_append(list, "foo");
>       list = g_list_append(list, "bar");
>       list = g_list_append(list, "baz");
>
>       puts("\nBefore prepending:");
>
>       while (list) {
>         printf("list data = '%s'\n", (char *) list->data);
>         list = g_list_next(list);
>       }
>
> Bzzzt!!  On the first iteration of the above printing loop I lose
> the true start of "list".  I should have used a temporary variable
> for looping over the list elements, as in
>
>       GList *tmp = list;
>
>       while (tmp) {
>          printf("list data = '%s'\n", (char *) tmp->data);
>          tmp = g_list_next(tmp);
>       }
>
> Or I suppose I could have used g_list_foreach() with a callback
> function, though I find that a bit awkward.
>
> Allin Cottrell