RE: passing glist to func

["Dugas, Alan" <alan dugas analog com>]

I believe this is due to g_list_append() moving the address of your glist
after it allocates space for it.  Therefore "list" is pointing to the old
memory location, and "a" is pointing to the new location.  A simple test to
confirm this would be to set foo() to return GList *a and set "list" to this
return value.



                                -- Stupid Genius

> ----------
> From:
> revans ozarkaircraftsystems com[SMTP:revans ozarkaircraftsystems com]
> Sent:         Monday, October 09, 2000 8:54 AM
> To:   gtk-app-devel-list gnome org
> Subject:      passing glist to func
>
>
> Please forgive my ignorance, but could someone explain why this doesn't
> work? I want to pass a pointer to a glist to a function and modify that
> glist there. The following program prints the value of "a" in function foo
> then gives a Segmentation fault trying to print the value of "list" in
> main.
>
> Thanks
> --------------------------
> #include <glib.h>
> #include <stdio.h>
>
>
> void foo(GList *a)
> {
>   a=g_list_append(a, "text");
>   a=g_list_first(a);
>   printf("a=%s\n", (char *) a->data);
> }
>
> int main()
> {
>   GList *list=NULL;
>   foo(list);
>   list=g_list_first(list);
>   printf("list=%s\n", (char *) list->data);
>   return 0;
> }
>
>
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