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
36 static char rcsid[] = "$NetBSD: lstDestroy.c,v 1.16 2008/12/13 15:19:29 dsl Exp $";
37 #else
38 #include <sys/cdefs.h>
39 #ifndef lint
40 #if 0
41 static char sccsid[] = "@(#)lstDestroy.c 8.1 (Berkeley) 6/6/93";
42 #else
43 __RCSID("$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 */
70 void
Lst_Destroy(Lst list,FreeProc * freeProc)71 Lst_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