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NeoStats/include/adnsdlist.h

57 lines
2 KiB
C

/* NeoStats - IRC Statistical Services
** Copyright (c) 1999-2008 Adam Rutter, Justin Hammond, Mark Hetherington
** http://www.neostats.net/
**
** Based on adns, which is
** Copyright (C) 1997-2008 Ian Jackson <ian@davenant.greenend.org.uk>
** Copyright (C) 1999-2008 Tony Finch <dot@dotat.at>
**
** This program 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 2 of the License, or
** (at your option) any later version.
**
** This program 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 this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
** USA
**
** NeoStats CVS Identification
** $Id$
*/
/*
* dlist.h
* - macros for handling doubly linked lists
*/
#ifndef ADNS_DLIST_H_INCLUDED
#define ADNS_DLIST_H_INCLUDED
#define ALIST_INIT(list) ((list).head= (list).tail= 0)
#define ALINK_INIT(link) ((link).next= (link).back= 0)
#define ALIST_UNLINK_PART(list,node,part) \
do { \
if ((node)->part back) (node)->part back->part next= (node)->part next; \
else (list).head= (node)->part next; \
if ((node)->part next) (node)->part next->part back= (node)->part back; \
else (list).tail= (node)->part back; \
} while(0)
#define ALIST_LINK_TAIL_PART(list,node,part) \
do { \
(node)->part next= 0; \
(node)->part back= (list).tail; \
if ((list).tail) (list).tail->part next= (node); else (list).head= (node); \
(list).tail= (node); \
} while(0)
#define ALIST_UNLINK(list,node) ALIST_UNLINK_PART(list,node,)
#define ALIST_LINK_TAIL(list,node) ALIST_LINK_TAIL_PART(list,node,)
#endif