diff options
Diffstat (limited to '20120831/lst.lib/lstRemove.c')
| -rw-r--r-- | 20120831/lst.lib/lstRemove.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/20120831/lst.lib/lstRemove.c b/20120831/lst.lib/lstRemove.c deleted file mode 100644 index 54d7b33..0000000 --- a/20120831/lst.lib/lstRemove.c +++ /dev/null @@ -1,136 +0,0 @@ -/* $NetBSD: lstRemove.c,v 1.14 2008/12/13 15:19:29 dsl Exp $ */ - -/* - * Copyright (c) 1988, 1989, 1990, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Adam de Boor. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef MAKE_NATIVE -static char rcsid[] = "$NetBSD: lstRemove.c,v 1.14 2008/12/13 15:19:29 dsl Exp $"; -#else -#include <sys/cdefs.h> -#ifndef lint -#if 0 -static char sccsid[] = "@(#)lstRemove.c 8.1 (Berkeley) 6/6/93"; -#else -__RCSID("$NetBSD: lstRemove.c,v 1.14 2008/12/13 15:19:29 dsl Exp $"); -#endif -#endif /* not lint */ -#endif - -/*- - * LstRemove.c -- - * Remove an element from a list - */ - -#include "lstInt.h" - -/*- - *----------------------------------------------------------------------- - * Lst_Remove -- - * Remove the given node from the given list. - * - * Results: - * SUCCESS or FAILURE. - * - * Side Effects: - * The list's firstPtr will be set to NULL if ln is the last - * node on the list. firsPtr and lastPtr will be altered if ln is - * either the first or last node, respectively, on the list. - * - *----------------------------------------------------------------------- - */ -ReturnStatus -Lst_Remove(Lst l, LstNode ln) -{ - List list = l; - ListNode lNode = ln; - - if (!LstValid (l) || - !LstNodeValid (ln, l)) { - return (FAILURE); - } - - /* - * unlink it from the list - */ - if (lNode->nextPtr != NULL) { - lNode->nextPtr->prevPtr = lNode->prevPtr; - } - if (lNode->prevPtr != NULL) { - lNode->prevPtr->nextPtr = lNode->nextPtr; - } - - /* - * if either the firstPtr or lastPtr of the list point to this node, - * adjust them accordingly - */ - if (list->firstPtr == lNode) { - list->firstPtr = lNode->nextPtr; - } - if (list->lastPtr == lNode) { - list->lastPtr = lNode->prevPtr; - } - - /* - * Sequential access stuff. If the node we're removing is the current - * node in the list, reset the current node to the previous one. If the - * previous one was non-existent (prevPtr == NULL), we set the - * end to be Unknown, since it is. - */ - if (list->isOpen && (list->curPtr == lNode)) { - list->curPtr = list->prevPtr; - if (list->curPtr == NULL) { - list->atEnd = Unknown; - } - } - - /* - * the only way firstPtr can still point to ln is if ln is the last - * node on the list (the list is circular, so lNode->nextptr == lNode in - * this case). The list is, therefore, empty and is marked as such - */ - if (list->firstPtr == lNode) { - list->firstPtr = NULL; - } - - /* - * note that the datum is unmolested. The caller must free it as - * necessary and as expected. - */ - if (lNode->useCount == 0) { - free(ln); - } else { - lNode->flags |= LN_DELETED; - } - - return (SUCCESS); -} - |
