diff options
Diffstat (limited to 'lst.lib/lstNext.c')
| -rw-r--r-- | lst.lib/lstNext.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/lst.lib/lstNext.c b/lst.lib/lstNext.c deleted file mode 100644 index 9c180d2cfad1..000000000000 --- a/lst.lib/lstNext.c +++ /dev/null @@ -1,119 +0,0 @@ -/* $NetBSD: lstNext.c,v 1.13 2020/07/03 08:37:57 rillig 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: lstNext.c,v 1.13 2020/07/03 08:37:57 rillig Exp $"; -#else -#include <sys/cdefs.h> -#ifndef lint -#if 0 -static char sccsid[] = "@(#)lstNext.c 8.1 (Berkeley) 6/6/93"; -#else -__RCSID("$NetBSD: lstNext.c,v 1.13 2020/07/03 08:37:57 rillig Exp $"); -#endif -#endif /* not lint */ -#endif - -/*- - * LstNext.c -- - * Return the next node for a list. - * 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. Because 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_Next -- - * Return the next node for the given list. - * - * Results: - * The next node or NULL if the list has yet to be opened. Also - * if the list is non-circular and the end has been reached, NULL - * is returned. - * - * Side Effects: - * the curPtr field is updated. - * - *----------------------------------------------------------------------- - */ -LstNode -Lst_Next(Lst l) -{ - ListNode tln; - List list = l; - - if ((LstValid (l) == FALSE) || - (list->isOpen == FALSE)) { - return NULL; - } - - list->prevPtr = list->curPtr; - - if (list->curPtr == NULL) { - if (list->atEnd == Unknown) { - /* - * If we're just starting out, atEnd will be Unknown. - * Then we want to start this thing off in the right - * direction -- at the start with atEnd being Middle. - */ - list->curPtr = tln = list->firstPtr; - list->atEnd = Middle; - } else { - tln = NULL; - list->atEnd = Tail; - } - } else { - tln = list->curPtr->nextPtr; - list->curPtr = tln; - - if (tln == list->firstPtr || tln == NULL) { - /* - * If back at the front, then we've hit the end... - */ - list->atEnd = Tail; - } else { - /* - * Reset to Middle if gone past first. - */ - list->atEnd = Middle; - } - } - - return tln; -} |