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Diffstat (limited to 'bootstrap/bmake/lst.lib/lstOpen.c')
-rw-r--r-- | bootstrap/bmake/lst.lib/lstOpen.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/bootstrap/bmake/lst.lib/lstOpen.c b/bootstrap/bmake/lst.lib/lstOpen.c new file mode 100644 index 00000000000..401b9a896ac --- /dev/null +++ b/bootstrap/bmake/lst.lib/lstOpen.c @@ -0,0 +1,92 @@ +/* $NetBSD: lstOpen.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: lstOpen.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $"; +#else +#include <sys/cdefs.h> +#ifndef lint +#if 0 +static char sccsid[] = "@(#)lstOpen.c 8.1 (Berkeley) 6/6/93"; +#else +__RCSID("$NetBSD: lstOpen.c,v 1.1.1.1 2004/03/11 13:04:17 grant Exp $"); +#endif +#endif /* not lint */ +#endif + +/*- + * LstOpen.c -- + * Open a list for sequential access. The sequential functions access the + * list in a slightly different way. CurPtr points to their idea of the + * current node in the list and they access the list based on it. + * If the list is circular, Lst_Next and Lst_Prev will go around + * the list forever. Lst_IsAtEnd must be used to determine when to stop. + */ + +#include "lstInt.h" + +/*- + *----------------------------------------------------------------------- + * Lst_Open -- + * Open a list for sequential access. A list can still be searched, + * etc., without confusing these functions. + * + * Results: + * SUCCESS or FAILURE. + * + * Side Effects: + * isOpen is set TRUE and curPtr is set to NilListNode so the + * other sequential functions no it was just opened and can choose + * the first element accessed based on this. + * + *----------------------------------------------------------------------- + */ +ReturnStatus +Lst_Open (l) + register Lst l; +{ + if (LstValid (l) == FALSE) { + return (FAILURE); + } + ((List) l)->isOpen = TRUE; + ((List) l)->atEnd = LstIsEmpty (l) ? Head : Unknown; + ((List) l)->curPtr = NilListNode; + + return (SUCCESS); +} + |