1*40412Sbostic /* 2*40412Sbostic * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 3*40412Sbostic * All rights reserved. 440411Sbostic * 5*40412Sbostic * This code is derived from software contributed to Berkeley by 6*40412Sbostic * Adam de Boor. 740411Sbostic * 8*40412Sbostic * Redistribution and use in source and binary forms are permitted 9*40412Sbostic * provided that the above copyright notice and this paragraph are 10*40412Sbostic * duplicated in all such forms and that any documentation, 11*40412Sbostic * advertising materials, and other materials related to such 12*40412Sbostic * distribution and use acknowledge that the software was developed 13*40412Sbostic * by the University of California, Berkeley. The name of the 14*40412Sbostic * University may not be used to endorse or promote products derived 15*40412Sbostic * from this software without specific prior written permission. 16*40412Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17*40412Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18*40412Sbostic * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1940411Sbostic */ 20*40412Sbostic 2140411Sbostic #ifndef lint 22*40412Sbostic static char sccsid[] = "@(#)lstLast.c 5.2 (Berkeley) 03/11/90"; 23*40412Sbostic #endif /* not lint */ 2440411Sbostic 25*40412Sbostic /*- 26*40412Sbostic * LstLast.c -- 27*40412Sbostic * Return the last element of a list 28*40412Sbostic */ 29*40412Sbostic 3040411Sbostic #include "lstInt.h" 3140411Sbostic 3240411Sbostic /*- 3340411Sbostic *----------------------------------------------------------------------- 3440411Sbostic * Lst_Last -- 3540411Sbostic * Return the last node on the list l. 3640411Sbostic * 3740411Sbostic * Results: 3840411Sbostic * The requested node or NILLNODE if the list is empty. 3940411Sbostic * 4040411Sbostic * Side Effects: 4140411Sbostic * None. 4240411Sbostic * 4340411Sbostic *----------------------------------------------------------------------- 4440411Sbostic */ 4540411Sbostic LstNode 4640411Sbostic Lst_Last (l) 4740411Sbostic Lst l; 4840411Sbostic { 4940411Sbostic if (!LstValid(l) || LstIsEmpty (l)) { 5040411Sbostic return (NILLNODE); 5140411Sbostic } else { 5240411Sbostic return ((LstNode)((List)l)->lastPtr); 5340411Sbostic } 5440411Sbostic } 5540411Sbostic 56