1/*	$NetBSD: lstDestroy.c,v 1.16 2008/12/13 15:19:29 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: lstDestroy.c,v 1.16 2008/12/13 15:19:29 dsl Exp $";
37#else
38#include <sys/cdefs.h>
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)lstDestroy.c	8.1 (Berkeley) 6/6/93";
42#else
43__RCSID("$NetBSD: lstDestroy.c,v 1.16 2008/12/13 15:19:29 dsl Exp $");
44#endif
45#endif /* not lint */
46#endif
47
48/*-
49 * LstDestroy.c --
50 *	Nuke a list and all its resources
51 */
52
53#include	"lstInt.h"
54
55/*-
56 *-----------------------------------------------------------------------
57 * Lst_Destroy --
58 *	Destroy a list and free all its resources. If the freeProc is
59 *	given, it is called with the datum from each node in turn before
60 *	the node is freed.
61 *
62 * Results:
63 *	None.
64 *
65 * Side Effects:
66 *	The given list is freed in its entirety.
67 *
68 *-----------------------------------------------------------------------
69 */
70void
71Lst_Destroy(Lst list, FreeProc *freeProc)
72{
73    ListNode	ln;
74    ListNode	tln = NULL;
75
76    if (list == NULL)
77	return;
78
79    /* To ease scanning */
80    if (list->lastPtr != NULL)
81	list->lastPtr->nextPtr = NULL;
82    else {
83	free(list);
84	return;
85    }
86
87    if (freeProc) {
88	for (ln = list->firstPtr; ln != NULL; ln = tln) {
89	     tln = ln->nextPtr;
90	     freeProc(ln->datum);
91	     free(ln);
92	}
93    } else {
94	for (ln = list->firstPtr; ln != NULL; ln = tln) {
95	     tln = ln->nextPtr;
96	     free(ln);
97	}
98    }
99
100    free(list);
101}
102