1/*	$NetBSD: lstFindFrom.c,v 1.15 2009/01/23 21:58:28 dsl 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: lstFindFrom.c,v 1.15 2009/01/23 21:58:28 dsl Exp $";
37#else
38#include <sys/cdefs.h>
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)lstFindFrom.c	8.1 (Berkeley) 6/6/93";
42#else
43__RCSID("$NetBSD: lstFindFrom.c,v 1.15 2009/01/23 21:58:28 dsl Exp $");
44#endif
45#endif /* not lint */
46#endif
47
48/*-
49 * LstFindFrom.c --
50 *	Find a node on a list from a given starting point. Used by Lst_Find.
51 */
52
53#include	"lstInt.h"
54
55/*-
56 *-----------------------------------------------------------------------
57 * Lst_FindFrom --
58 *	Search for a node starting and ending with the given one on the
59 *	given list using the passed datum and comparison function to
60 *	determine when it has been found.
61 *
62 * Results:
63 *	The found node or NULL
64 *
65 * Side Effects:
66 *	None.
67 *
68 *-----------------------------------------------------------------------
69 */
70LstNode
71Lst_FindFrom(Lst l, LstNode ln, const void *d,
72	     int (*cProc)(const void *, const void *))
73{
74    ListNode	tln;
75
76    if (!LstValid (l) || LstIsEmpty (l) || !LstNodeValid (ln, l)) {
77	return NULL;
78    }
79
80    tln = ln;
81
82    do {
83	if ((*cProc)(tln->datum, d) == 0)
84	    return (tln);
85	tln = tln->nextPtr;
86    } while (tln != ln && tln != NULL);
87
88    return NULL;
89}
90
91