3e424d0a24
I've also added insque(3) and remque(3) (from NetBSD because the OpenBSD ones are currently broken for non-circular lists). I've not added the three hash table functions that should be in this header because they operate on a single global hash table and thus aren't likely to be useful. Bug: https://code.google.com/p/android/issues/detail?id=73719 Change-Id: I97397a7b921e2e860fd9c8032cafd9097380498a
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/*
|
|
* Copyright (c) 1993 John Brezak
|
|
* 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. The name of the author may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: insque.c,v 1.3 2012/06/25 22:32:45 abs Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <assert.h>
|
|
#include <search.h>
|
|
|
|
struct qelem {
|
|
struct qelem *q_forw;
|
|
struct qelem *q_back;
|
|
};
|
|
|
|
void
|
|
insque(void *entry, void *pred)
|
|
{
|
|
struct qelem *e = (struct qelem *) entry;
|
|
struct qelem *p = (struct qelem *) pred;
|
|
|
|
_DIAGASSERT(e != 0);
|
|
|
|
e->q_back = p;
|
|
if (p) {
|
|
e->q_forw = p->q_forw;
|
|
if (p->q_forw)
|
|
p->q_forw->q_back = e;
|
|
p->q_forw = e;
|
|
} else
|
|
e->q_forw = 0;
|
|
}
|