Re: g_list problem

[John Coppens <jcoppens usa net>]

On Mon, 30 Sep 2002 10:28:12 +0200
Jean-Max Redonnet <jmax redonnetNOSP Mmeca insa-tlse fr> wrote:

> Hello, 
>
> I have a problem with allocation of first element in a GList. This GList 
> should de declarated in the main function, but contents are computed into 
> another function (included into another file). I've written a small program 
> to illustrate my purpose :

The problem is that the function argument changes. The pointer must be able
to change!

> the secondary file is :
> #include <gtk/gtk.h>
>
> int function(GList **list)  <---   Changed this to **list
> {
>       *list = g_list_append(*list, "First"); <---
>       *list = g_list_append(*list, "Second"); <---
>       *list = g_list_append(*list, "Third"); <---
>
>       return 1;
> }
>
> and in the main file I put :
> #include <gtk/gtk.h>
>
> int main()
> {
>       GList *list = NULL;
>       
>       function(&list); <---
>       g_print("word is %s \n", (char *)list->data);
>       
>       return 0;
> }

This should work, I think

John

I guess you could also report the result with return


> GList *function(GList *list)
> {
>       list = g_list_append(list, "First");
>       list = g_list_append(list, "Second");
>       list = g_list_append(list, "Third");
>
>       return list;
> }

in main()

        list = function(list);