1/*	$NetBSD: lstMember.c,v 1.14 2013/11/14 00:01:28 sjg Exp $	*/
2
3/*
4 * Copyright (c) 1988, 1989, 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Adam de Boor.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef MAKE_NATIVE
36static char rcsid[] = "$NetBSD: lstMember.c,v 1.14 2013/11/14 00:01:28 sjg Exp $";
37#else
38#include <sys/cdefs.h>
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)lstMember.c	8.1 (Berkeley) 6/6/93";
42#else
43__RCSID("$NetBSD: lstMember.c,v 1.14 2013/11/14 00:01:28 sjg Exp $");
44#endif
45#endif /* not lint */
46#endif
47
48/*-
49 * lstMember.c --
50 *	See if a given datum is on a given list.
51 */
52
53#include    "lstInt.h"
54
55LstNode
56Lst_Member(Lst l, void *d)
57{
58    List    	  	list = l;
59    ListNode	lNode;
60
61    if (list == NULL) {
62	return NULL;
63    }
64    lNode = list->firstPtr;
65    if (lNode == NULL) {
66	return NULL;
67    }
68
69    do {
70	if (lNode->datum == d) {
71	    return lNode;
72	}
73	lNode = lNode->nextPtr;
74    } while (lNode != NULL && lNode != list->firstPtr);
75
76    return NULL;
77}
78