list.c

   1 /*
   2  * Copyright (C) 2009 Diego Hernan Borghetti.
   3  * Eco
   4  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #include "list.h"
  10
  11
  12 void e_list_add(E_List *list, E_Link *ln)
  13 {
  14         ln->next= NULL;
  15         ln->prev= list->last;
  16
  17         if (list->last)
  18                 list->last->next= ln;
  19         if (!list->first)
  20                 list->first= ln;
  21         list->last= ln;
  22 }
  23
  24 void e_list_head(E_List *list, E_Link *ln)
  25 {
  26         ln->next= list->first;
  27         ln->prev= NULL;
  28
  29         if (list->first)
  30                 list->first->prev= ln;
  31         if (!list->last)
  32                 list->last= ln;
  33         list->first= ln;
  34 }
  35
  36 void e_list_rem(E_List *list, E_Link *ln)
  37 {
  38         if (ln->prev)
  39                 ln->prev->next= ln->next;
  40         if (ln->next)
  41                 ln->next->prev= ln->prev;
  42         if (list->first == ln)
  43                 list->first= ln->next;
  44         if (list->last == ln)
  45                 list->last= ln->prev;
  46         ln->next= NULL;
  47         ln->prev= NULL;
  48 }