Re: g_list_first()

[Detlef Reichl <detlef reichl gmx org>]

On Mo, 2005-11-28 at 15:24 -0400, Elmano Carvalho wrote:
> Hello, 
> 
> I am writing an application that uses Singly-Linked Lists for adding
> and removing elements on that list. 
> 
> I need to go through the list, identify each element and remove them
> on the go...
> 
> As the subject suggests, there's a function for getting the first
> element of the list (g_list_first()), which is what I need, but is 
> 
> only available for the doubly-linked lists implementations... 
> 
> However, there's one, namely g_slist_nth(),  which should do the trick
> but on the iteration it fails to get the elements, so I can
> 
> do what I want with them. 
> 
> Am I on the right track, or is there another function in glib.h that
> would work like a charm for the GSList?
> 

Nope.

like the name says the list ist only linked in one way, so there is no
reference from one element to the previous.

One way is to hold a reference to the first element of the list (you
always shall do it, cause otherwise you later cant free em later) and
from there use g_slist_nth.

Else use the double linked list. In most cases the overhead is not that
much.

Cheers
detlef

Ps. This list is for the development of Gtk+ self. Please post this kind
of questions to the gtk-app-devel list.


> Thanks in advance for the pointers, 
> 
> Elmano Carvalho
> elmano carvalho gmail com
> 
> 
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