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

   1 /*      $NetBSD: lstDupl.c,v 1.16 2009/01/23 21:26:30 dsl 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: lstDupl.c,v 1.16 2009/01/23 21:26:30 dsl Exp $";
  37 #else
  38 #include <sys/cdefs.h>
  39 #ifndef lint
  40 #if 0
  41 static char sccsid[] = "@(#)lstDupl.c   8.1 (Berkeley) 6/6/93";
  42 #else
  43 __RCSID("$NetBSD: lstDupl.c,v 1.16 2009/01/23 21:26:30 dsl Exp $");
  44 #endif
  45 #endif /* not lint */
  46 #endif
  47
  48 /*-
  49  * listDupl.c --
  50  *      Duplicate a list. This includes duplicating the individual
  51  *      elements.
  52  */
  53
  54 #include    "lstInt.h"
  55
  56 /*-
  57  *-----------------------------------------------------------------------
  58  * Lst_Duplicate --
  59  *      Duplicate an entire list. If a function to copy a void *is
  60  *      given, the individual client elements will be duplicated as well.
  61  *
  62  * Input:
  63  *      l               the list to duplicate
  64  *      copyProc        A function to duplicate each void *
  65  *
  66  * Results:
  67  *      The new Lst structure or NULL if failure.
  68  *
  69  * Side Effects:
  70  *      A new list is created.
  71  *-----------------------------------------------------------------------
  72  */
  73 Lst
  74 Lst_Duplicate(Lst l, DuplicateProc *copyProc)
  75 {
  76     Lst         nl;
  77     ListNode    ln;
  78     List        list = l;
  79
  80     if (!LstValid (l)) {
  81         return NULL;
  82     }
  83
  84     nl = Lst_Init(list->isCirc);
  85     if (nl == NULL) {
  86         return NULL;
  87     }
  88
  89     ln = list->firstPtr;
  90     while (ln != NULL) {
  91         if (copyProc != NULL) {
  92             if (Lst_AtEnd(nl, copyProc(ln->datum)) == FAILURE) {
  93                 return NULL;
  94             }
  95         } else if (Lst_AtEnd(nl, ln->datum) == FAILURE) {
  96             return NULL;
  97         }
  98
  99         if (list->isCirc && ln == list->lastPtr) {
 100             ln = NULL;
 101         } else {
 102             ln = ln->nextPtr;
 103         }
 104     }
 105
 106     return (nl);
 107 }