96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)lstAppend.c 8.1 (Berkeley) 6/6/93
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*/
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#ifndef lint
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#endif /* not lint */
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/*-
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* LstAppend.c --
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* Add a new node with a new datum after an existing node
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*/
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#include "make.h"
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#include "lst.h"
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/*-
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*-----------------------------------------------------------------------
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* Lst_Append --
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* Create a new node and add it to the given list after the given node.
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*
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* Arguments:
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* l affected list
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* ln node after which to append the datum
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* d said datum
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*
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* Side Effects:
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* A new LstNode is created and linked in to the List. The lastPtr
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* field of the List will be altered if ln is the last node in the
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* list. lastPtr and firstPtr will alter if the list was empty and
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* ln was NULL.
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*
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*-----------------------------------------------------------------------
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*/
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void
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Lst_Append(Lst *list, LstNode *ln, void *d)
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{
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LstNode *nLNode;
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nLNode = emalloc(sizeof(*nLNode));
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nLNode->datum = d;
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nLNode->useCount = nLNode->flags = 0;
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if (ln == NULL) {
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nLNode->nextPtr = nLNode->prevPtr = NULL;
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list->firstPtr = list->lastPtr = nLNode;
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} else {
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nLNode->prevPtr = ln;
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nLNode->nextPtr = ln->nextPtr;
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ln->nextPtr = nLNode;
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if (nLNode->nextPtr != NULL) {
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nLNode->nextPtr->prevPtr = nLNode;
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}
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if (ln == list->lastPtr) {
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list->lastPtr = nLNode;
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}
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}
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}
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