mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-24 09:13:37 +01:00
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Ed James.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1987 by Ed James, UC Berkeley. All rights reserved.
|
|
*
|
|
* Copy permission is hereby granted provided that this notice is
|
|
* retained on all partial or complete copies.
|
|
*
|
|
* For more info on this and all of my stuff, mail edjames@berkeley.edu.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)list.c 8.1 (Berkeley) 5/31/93";
|
|
#endif /* not lint */
|
|
|
|
#include "include.h"
|
|
|
|
PLANE *
|
|
newplane()
|
|
{
|
|
return ((PLANE *) calloc(1, sizeof (PLANE)));
|
|
}
|
|
|
|
append(l, p)
|
|
LIST *l;
|
|
PLANE *p;
|
|
{
|
|
PLANE *q = NULL, *r = NULL;
|
|
|
|
if (l->head == NULL) {
|
|
p->next = p->prev = NULL;
|
|
l->head = l->tail = p;
|
|
} else {
|
|
q = l -> head;
|
|
|
|
while (q != NULL && q->plane_no < p->plane_no) {
|
|
r = q;
|
|
q = q -> next;
|
|
}
|
|
|
|
if (q) {
|
|
if (r) {
|
|
p->prev = r;
|
|
r->next = p;
|
|
p->next = q;
|
|
q->prev = p;
|
|
} else {
|
|
p->next = q;
|
|
p->prev = NULL;
|
|
q->prev = p;
|
|
l->head = p;
|
|
}
|
|
} else {
|
|
l->tail->next = p;
|
|
p->next = NULL;
|
|
p->prev = l->tail;
|
|
l->tail = p;
|
|
}
|
|
}
|
|
}
|
|
|
|
delete(l, p)
|
|
LIST *l;
|
|
PLANE *p;
|
|
{
|
|
if (l->head == NULL)
|
|
loser(p, "deleted a non-existant plane! Get help!");
|
|
|
|
if (l->head == p && l->tail == p)
|
|
l->head = l->tail = NULL;
|
|
else if (l->head == p) {
|
|
l->head = p->next;
|
|
l->head->prev = NULL;
|
|
} else if (l->tail == p) {
|
|
l->tail = p->prev;
|
|
l->tail->next = NULL;
|
|
} else {
|
|
p->prev->next = p->next;
|
|
p->next->prev = p->prev;
|
|
}
|
|
}
|