usr.bin/make/lst.lib/lstClose.c

   1 /*      $NetBSD: lstClose.c,v 1.10 2004/05/07 00:04:41 ross Exp $       */
   2
   3 /*
   4  * Copyright (c) 1988, 1989, 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Adam de Boor.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #ifndef MAKE_NATIVE
  36 static char rcsid[] = "$NetBSD: lstClose.c,v 1.10 2004/05/07 00:04:41 ross Exp $";
  37 #else
  38 #include <sys/cdefs.h>
  39 #ifndef lint
  40 #if 0
  41 static char sccsid[] = "@(#)lstClose.c  8.1 (Berkeley) 6/6/93";
  42 #else
  43 __RCSID("$NetBSD: lstClose.c,v 1.10 2004/05/07 00:04:41 ross Exp $");
  44 #endif
  45 #endif /* not lint */
  46 #endif
  47
  48 /*-
  49  * LstClose.c --
  50  *      Close a list for sequential access.
  51  *      The sequential functions access the list in a slightly different way.
  52  *      CurPtr points to their idea of the current node in the list and they
  53  *      access the list based on it. Because the list is circular, Lst_Next
  54  *      and Lst_Prev will go around the list forever. Lst_IsAtEnd must be
  55  *      used to determine when to stop.
  56  */
  57
  58 #include        "lstInt.h"
  59
  60 /*-
  61  *-----------------------------------------------------------------------
  62  * Lst_Close --
  63  *      Close a list which was opened for sequential access.
  64  *
  65  * Input:
  66  *      l               The list to close
  67  *
  68  * Results:
  69  *      None.
  70  *
  71  * Side Effects:
  72  *      The list is closed.
  73  *
  74  *-----------------------------------------------------------------------
  75  */
  76 void
  77 Lst_Close(Lst l)
  78 {
  79     List        list = l;
  80
  81     if (LstValid(l) == TRUE) {
  82         list->isOpen = FALSE;
  83         list->atEnd = Unknown;
  84     }
  85 }
  86