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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)queue.h 8.5 (Berkeley) 8/20/94
*/
/* 2006-04-21 Modified by Walter van Niftrik. */
#ifndef _SCI_LIST_H
#define _SCI_LIST_H
#include "common/scummsys.h"
namespace Sci {
/* List definitions. */
#define LIST_HEAD(name, type) \
struct name { \
struct type *lh_first; /* first element */ \
}
#define LIST_HEAD_INITIALIZER(head) \
{ NULL }
#define LIST_ENTRY(type) \
struct { \
struct type *le_next; /* next element */ \
struct type **le_prev; /* address of previous next element */ \
}
#define LIST_INIT(head) do { \
(head)->lh_first = NULL; \
} while (0)
#define LIST_INSERT_AFTER(listelm, elm, field) do { \
if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \
(listelm)->field.le_next->field.le_prev = \
&(elm)->field.le_next; \
(listelm)->field.le_next = (elm); \
(elm)->field.le_prev = &(listelm)->field.le_next; \
} while (0)
#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
(elm)->field.le_prev = (listelm)->field.le_prev; \
(elm)->field.le_next = (listelm); \
*(listelm)->field.le_prev = (elm); \
(listelm)->field.le_prev = &(elm)->field.le_next; \
} while (0)
#define LIST_INSERT_HEAD(head, elm, field) do { \
if (((elm)->field.le_next = (head)->lh_first) != NULL) \
(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
(head)->lh_first = (elm); \
(elm)->field.le_prev = &(head)->lh_first; \
} while (0)
#define LIST_REMOVE(elm, field) do { \
if ((elm)->field.le_next != NULL) \
(elm)->field.le_next->field.le_prev = \
(elm)->field.le_prev; \
*(elm)->field.le_prev = (elm)->field.le_next; \
} while (0)
#define LIST_FOREACH(var, head, field) \
for ((var) = ((head)->lh_first); \
(var); \
(var) = ((var)->field.le_next))
/* List access methods. */
#define LIST_EMPTY(head) ((head)->lh_first == NULL)
#define LIST_FIRST(head) ((head)->lh_first)
#define LIST_NEXT(elm, field) ((elm)->field.le_next)
/* Circular list definitions. */
#define CLIST_HEAD(name, type) \
struct name { \
struct type *clh_first; /* first element. */ \
}
#define CLIST_HEAD_INITIALIZER(head) \
{ NULL }
#define CLIST_ENTRY(type) \
struct { \
struct type *cle_next; /* next element. */ \
struct type *cle_prev; /* previous element */ \
}
#define CLIST_INIT(head) do { \
(head)->clh_first = NULL; \
} while (0)
#define CLIST_INSERT_HEAD(head, elm, field) do { \
if ((head)->clh_first == NULL) \
(elm)->field.cle_next = (elm)->field.cle_prev = (elm); \
else { \
(elm)->field.cle_next = (head)->clh_first; \
(elm)->field.cle_prev = \
(head)->clh_first->field.cle_prev; \
(head)->clh_first->field.cle_prev = (elm); \
(elm)->field.cle_prev->field.cle_next = (elm); \
} \
(head)->clh_first = (elm); \
} while (0)
#define CLIST_INSERT_AFTER(listelm, elm, field) do { \
(elm)->field.cle_prev = (listelm); \
(elm)->field.cle_next = (listelm)->field.cle_next; \
(listelm)->field.cle_next->field.cle_prev = (elm); \
(listelm)->field.cle_next = (elm); \
} while (0)
#define CLIST_REMOVE(head, elm, field) do { \
if ((elm)->field.cle_next == (elm)) \
(head)->clh_first = NULL; \
else { \
if ((head)->clh_first == (elm)) \
(head)->clh_first = (elm)->field.cle_next; \
(elm)->field.cle_prev->field.cle_next = \
(elm)->field.cle_next; \
(elm)->field.cle_next->field.cle_prev = \
(elm)->field.cle_prev; \
} \
} while (0)
#define CLIST_FOREACH(var, head, field) \
for ((var) = (head)->clh_first; \
(var); \
(var) = ((var)->field.cle_next == (head)->clh_first ? \
NULL : (var)->field.cle_next))
/* Circular list access methods. */
#define CLIST_EMPTY(head) ((head)->clh_first == NULL)
#define CLIST_FIRST(head) ((head)->clh_first)
#define CLIST_NEXT(elm, field) ((elm)->field.cle_next)
#define CLIST_PREV(elm, field) ((elm)->field.cle_prev)
} // End of namespace Sci
#endif /* !_SCI_LIST_H */
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