2 * The new sysinstall program.
4 * This is probably the last attempt in the `sysinstall' line, the next
5 * generation being slated for what's essentially a complete rewrite.
7 * $FreeBSD: src/release/sysinstall/list.h,v 1.2 1999/08/28 01:34:15 peter Exp $
8 * $DragonFly: src/release/sysinstall/Attic/list.h,v 1.2 2003/06/17 04:27:21 dillon Exp $
10 * Copyright (c) 1997 FreeBSD, Inc.
11 * All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer,
18 * verbatim and that no modifications are made prior to this
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
24 * THIS SOFTWARE IS PROVIDED BY PAUL TRAINA ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL PAUL TRAINA OR HIS KILLER RATS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 typedef struct _qelement {
40 struct _qelement *q_forw;
41 struct _qelement *q_back;
44 #define INITQUE(Xhead) { \
45 (Xhead).q_forw = &(Xhead); \
46 (Xhead).q_back = &(Xhead); \
49 #define EMPTYQUE(Xhead) \
50 ((Xhead).q_forw == &(Xhead))
52 #define INSQUEUE(elem, pred) { \
53 register qelement *Xe = (qelement *) (elem); \
54 register qelement *Xp = (qelement *) (pred); \
55 Xp->q_forw = (Xe->q_forw = (Xe->q_back = Xp)->q_forw)->q_back = Xe; \
58 #define REMQUE(elem) { \
59 register qelement *Xe = (qelement *) (elem); \
60 (Xe->q_back->q_forw = Xe->q_forw)->q_back = Xe->q_back; \