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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* list.h: A header for the code in list.c. |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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* $Id$ |
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*/ |
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|
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#ifndef INCLUDED_list_h |
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#define INCLUDED_list_h |
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|
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/* These macros are basically swiped from the linux kernel |
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* they are simple yet effective |
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*/ |
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|
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/* |
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* Walks forward of a list. |
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* pos is your node |
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* head is your list head |
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*/ |
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#define DLINK_FOREACH(pos, head) for (pos = (head); pos != NULL; pos = pos->next) |
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|
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/* |
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* Walks forward of a list safely while removing nodes |
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* pos is your node |
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* n is another list head for temporary storage |
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* head is your list head |
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*/ |
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#define DLINK_FOREACH_SAFE(pos, n, head) for (pos = (head), n = pos ? pos->next : NULL; pos != NULL; pos = n, n = pos ? pos->next : NULL) |
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#define DLINK_FOREACH_PREV(pos, head) for (pos = (head); pos != NULL; pos = pos->prev) |
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|
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/* Returns the list length */ |
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#define dlink_list_length(list) (list)->length |
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|
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/* |
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* double-linked-list stuff |
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*/ |
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typedef struct _dlink_node dlink_node; |
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typedef struct _dlink_list dlink_list; |
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|
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struct _dlink_node |
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{ |
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void *data; |
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dlink_node *prev; |
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dlink_node *next; |
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}; |
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|
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struct _dlink_list |
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{ |
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dlink_node *head; |
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dlink_node *tail; |
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unsigned int length; |
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}; |
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|
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extern void dlinkAdd(void *, dlink_node *, dlink_list *); |
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extern void dlinkAddBefore(dlink_node *, void *, dlink_node *, dlink_list *); |
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extern void dlinkAddTail(void *, dlink_node *, dlink_list *); |
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extern void dlinkDelete(dlink_node *, dlink_list *); |
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extern void dlinkMoveList(dlink_list *, dlink_list *); |
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extern void dlink_move_node(dlink_node *, dlink_list *, dlink_list *); |
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extern dlink_node *dlinkFind(dlink_list *, void *); |
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extern dlink_node *dlinkFindDelete(dlink_list *, void *); |
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|
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extern void init_dlink_nodes(void); |
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extern void free_dlink_node(dlink_node *); |
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extern dlink_node *make_dlink_node(void); |
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#endif |
