/* $NetBSD: lstFirst.c,v 1.1.1.1 2004/03/11 13:04:17 grant 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. */ #ifdef MAKE_BOOTSTRAP static char rcsid[] = "$NetBSD: lstFirst.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $"; #else #include #ifndef lint #if 0 static char sccsid[] = "@(#)lstFirst.c 8.1 (Berkeley) 6/6/93"; #else __RCSID("$NetBSD: lstFirst.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $"); #endif #endif /* not lint */ #endif /*- * LstFirst.c -- * Return the first node of a list */ #include "lstInt.h" /*- *----------------------------------------------------------------------- * Lst_First -- * Return the first node on the given list. * * Results: * The first node or NILLNODE if the list is empty. * * Side Effects: * None. * *----------------------------------------------------------------------- */ LstNode Lst_First (l) Lst l; { if (!LstValid (l) || LstIsEmpty (l)) { return (NILLNODE); } else { return ((LstNode)((List)l)->firstPtr); } }