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/* OpenIDA - Outil d'analyse de fichiers binaires
* dllist.h - prototypes de l'implantation simple des listes doublement chaînées
*
* Copyright (C) 2008 Cyrille Bagard
*
* This file is part of OpenIDA.
*
* OpenIDA is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* OpenIDA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _DLLIST_H
#define _DLLIST_H
#define NULL ((void *)0)
/* Structure à inclure en tête de structure */
typedef struct _dl_list_item
{
struct _dl_list_item *prev; /* Elément précédent */
struct _dl_list_item *next; /* Elément suivant */
} dl_list_item;
typedef dl_list_item *dl_list_head;
#define DL_LIST_ITEM dl_list_item dummy
#define DLL_CAST(item) ((dl_list_item *)item)
#define DLL_HCAST(item) ((dl_list_item **)item)
#define DL_LIST_HEAD_INIT(head) \
*(head) = NULL
#define DL_LIST_ITEM_INIT(item) \
do \
{ \
DLL_CAST(item)->prev = NULL; \
DLL_CAST(item)->next = NULL; \
\
} while(0)
#define DL_LIST_NEXT(item, type) (type)DLL_CAST(item)->next
#define DL_LIST_PREV(item, type) (type)DLL_CAST(item)->prev
#define DL_LIST_IS_ALONE(head) (DLL_CAST(head)->next == DLL_CAST(head))
/* Ajoute un élément dans une liste doublement chaînée. */
void __dl_list_add(dl_list_item *, dl_list_head *, dl_list_item *, dl_list_item *);
/* Supprime un élément d'une liste doublement chaînée. */
void __dl_list_del(dl_list_item *, dl_list_item *);
/* Intervertit deux éléments dans une liste doublement chaînée. */
void swap_dl_list_items(dl_list_head *, dl_list_item *, dl_list_item *);
/* Compte le nombre d'éléments présents dans une liste. */
unsigned int count_dl_list_items(dl_list_head);
#define dl_list_empty(head) \
((head) == NULL)
#define dl_list_last(head, type) \
(dl_list_empty(head) ? NULL : (type)((head)->prev == NULL ? (head) : (head)->prev))
#define dl_list_add(new, head) \
__dl_list_add(DLL_CAST(new), (head), (dl_list_empty(*(head)) ? DLL_CAST(new) : dl_list_last(*head, dl_list_item *)), (dl_list_empty(*(head)) ? DLL_CAST(new) : *(head)))
#define dl_list_add_tail(new, head) \
__dl_list_add(DLL_CAST(new), (head), (dl_list_empty(*(head)) ? DLL_CAST(new) : (*(head))->prev), (dl_list_empty(*(head)) ? DLL_CAST(new) : *(head)))
#define dl_list_insert_before(new, target, head) \
do \
{ \
DLL_CAST(new)->prev = DLL_CAST(target)->prev; \
DLL_CAST(target)->prev->next = DLL_CAST(new); \
DLL_CAST(new)->next = DLL_CAST(target); \
DLL_CAST(target)->prev = DLL_CAST(new); \
if (DLL_CAST(target) == *head) *head = DLL_CAST(target); \
\
} while (0)
#define dl_list_del(item, head) \
do \
{ \
__dl_list_del(DLL_CAST(item)->prev, DLL_CAST(item)->next); \
if (*head == DLL_CAST(item)) *head = DLL_CAST(item)->next; \
if (*head == DLL_CAST(item)) *head = NULL; \
DLL_CAST(item)->next = NULL; \
DLL_CAST(item)->prev = NULL; \
\
} while(0)
#define dl_list_move_tail(item, head) \
do \
{ \
dl_list_del(item, head); \
dl_list_add_tail(item, head); \
\
} while(0)
#define dl_list_for_each(pos, head, type) \
for (pos = (type)(head); \
pos != NULL; \
pos = (type)(DLL_CAST(pos)->next == (head) ? NULL : DLL_CAST(pos)->next))
#define dl_list_for_each_safe(pos, head, tmp, type) \
for (pos = (type)*(head), \
tmp = (type)(pos != NULL && DLL_CAST(pos)->next != *(head) ?\
DLL_CAST(pos)->next : NULL); \
pos != NULL; \
pos = tmp, \
tmp = (type)(pos != NULL && DLL_CAST(pos)->next != *(head) ?\
DLL_CAST(pos)->next : NULL))
#define dl_list_for_each_prev(pos, head, type) \
for (pos = dl_list_last(head, type); \
pos != NULL; \
pos = (type)(DLL_CAST(pos) == (head) ? NULL : DLL_CAST(pos)->prev))
#endif /* _DLLIST_H */
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