xref: /openbsd-src/usr.bin/make/lst.lib/lstFindFrom.c (revision a28daedfc357b214be5c701aa8ba8adb29a7f1c2)
1 /*	$OpenPackages$ */
2 /*	$OpenBSD: lstFindFrom.c,v 1.17 2007/09/16 09:46:14 espie Exp $	*/
3 /*	$NetBSD: lstFindFrom.c,v 1.6 1996/11/06 17:59:40 christos Exp $ */
4 
5 /*
6  * Copyright (c) 1988, 1989, 1990, 1993
7  *	The Regents of the University of California.  All rights reserved.
8  *
9  * This code is derived from software contributed to Berkeley by
10  * Adam de Boor.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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, 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
34  * SUCH DAMAGE.
35  */
36 
37 /*-
38  * LstFindFrom.c --
39  *	Find a node on a list from a given starting point. Used by Lst_Find.
40  */
41 
42 #include	"lstInt.h"
43 #include	<stddef.h>
44 
45 /*-
46  *-----------------------------------------------------------------------
47  * Lst_FindFrom --
48  *	Search for a node starting and ending with the given one on the
49  *	given list using the passed datum and comparison function to
50  *	determine when it has been found.
51  *
52  * Results:
53  *	The found node or NULL
54  *-----------------------------------------------------------------------
55  */
56 LstNode
57 Lst_FindFrom(LstNode ln, FindProc cProc, void *d)
58 {
59 	LstNode tln;
60 
61 	for (tln = ln; tln != NULL; tln = tln->nextPtr)
62 		if ((*cProc)(tln->datum, d) == 0)
63 			return tln;
64 
65 	return NULL;
66 }
67 
68