mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-26 02:02:33 +00:00
125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
/* $NetBSD: list.h,v 1.2 2004/05/20 19:51:55 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
|
|
* Copyright (c) 1997,1999 by Internet Software Consortium.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
|
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
/*
|
|
* This version of this file is derived from Android 2.3 "Gingerbread",
|
|
* which contains uncredited changes by Android/Google developers. It has
|
|
* been modified in 2011 for use in the Android build of Mozilla Firefox by
|
|
* Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
|
|
* and Steve Workman <sjhworkman@gmail.com>).
|
|
* These changes are offered under the same license as the original NetBSD
|
|
* file, whose copyright and license are unchanged above.
|
|
*/
|
|
|
|
#ifndef LIST_H
|
|
#define LIST_H 1
|
|
#include "assertions.h"
|
|
|
|
#define LIST(type) struct { type *head, *tail; }
|
|
#define INIT_LIST(list) \
|
|
do { (list).head = NULL; (list).tail = NULL; } while (/*CONSTCOND*/0)
|
|
|
|
#define LINK(type) struct { type *prev, *next; }
|
|
#define INIT_LINK_TYPE(elt, link, type) \
|
|
do { \
|
|
(elt)->link.prev = (type *)(-1); \
|
|
(elt)->link.next = (type *)(-1); \
|
|
} while (/*CONSTCOND*/0)
|
|
#define INIT_LINK(elt, link) \
|
|
INIT_LINK_TYPE(elt, link, void)
|
|
#define LINKED(elt, link) ((void *)((elt)->link.prev) != (void *)(-1))
|
|
|
|
#define HEAD(list) ((list).head)
|
|
#define TAIL(list) ((list).tail)
|
|
#define EMPTY(list) ((list).head == NULL)
|
|
|
|
#define PREPEND(list, elt, link) \
|
|
do { \
|
|
INSIST(!LINKED(elt, link));\
|
|
if ((list).head != NULL) \
|
|
(list).head->link.prev = (elt); \
|
|
else \
|
|
(list).tail = (elt); \
|
|
(elt)->link.prev = NULL; \
|
|
(elt)->link.next = (list).head; \
|
|
(list).head = (elt); \
|
|
} while (/*CONSTCOND*/0)
|
|
|
|
#define APPEND(list, elt, link) \
|
|
do { \
|
|
INSIST(!LINKED(elt, link));\
|
|
if ((list).tail != NULL) \
|
|
(list).tail->link.next = (elt); \
|
|
else \
|
|
(list).head = (elt); \
|
|
(elt)->link.prev = (list).tail; \
|
|
(elt)->link.next = NULL; \
|
|
(list).tail = (elt); \
|
|
} while (/*CONSTCOND*/0)
|
|
|
|
#define UNLINK_TYPE(list, elt, link, type) \
|
|
do { \
|
|
INSIST(LINKED(elt, link));\
|
|
if ((elt)->link.next != NULL) \
|
|
(elt)->link.next->link.prev = (elt)->link.prev; \
|
|
else \
|
|
(list).tail = (elt)->link.prev; \
|
|
if ((elt)->link.prev != NULL) \
|
|
(elt)->link.prev->link.next = (elt)->link.next; \
|
|
else \
|
|
(list).head = (elt)->link.next; \
|
|
INIT_LINK_TYPE(elt, link, type); \
|
|
} while (/*CONSTCOND*/0)
|
|
#define UNLINK(list, elt, link) \
|
|
UNLINK_TYPE(list, elt, link, void)
|
|
|
|
#define PREV(elt, link) ((elt)->link.prev)
|
|
#define NEXT(elt, link) ((elt)->link.next)
|
|
|
|
#define INSERT_BEFORE(list, before, elt, link) \
|
|
do { \
|
|
INSIST(!LINKED(elt, link));\
|
|
if ((before)->link.prev == NULL) \
|
|
PREPEND(list, elt, link); \
|
|
else { \
|
|
(elt)->link.prev = (before)->link.prev; \
|
|
(before)->link.prev = (elt); \
|
|
(elt)->link.prev->link.next = (elt); \
|
|
(elt)->link.next = (before); \
|
|
} \
|
|
} while (/*CONSTCOND*/0)
|
|
|
|
#define INSERT_AFTER(list, after, elt, link) \
|
|
do { \
|
|
INSIST(!LINKED(elt, link));\
|
|
if ((after)->link.next == NULL) \
|
|
APPEND(list, elt, link); \
|
|
else { \
|
|
(elt)->link.next = (after)->link.next; \
|
|
(after)->link.next = (elt); \
|
|
(elt)->link.next->link.prev = (elt); \
|
|
(elt)->link.prev = (after); \
|
|
} \
|
|
} while (/*CONSTCOND*/0)
|
|
|
|
#define ENQUEUE(list, elt, link) APPEND(list, elt, link)
|
|
#define DEQUEUE(list, elt, link) UNLINK(list, elt, link)
|
|
|
|
#endif /* LIST_H */
|