lstDestroy.c revision 272461
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