/*
 * fmgrrtrv: FileManager.  Retrives the linked list of ints saved by fmgrsave.
 * This example appears in Section 11.2 of the manual.
 *
 * $Id: fmgrrtrv.cpp,v 7.11 1996/08/07 05:21:24 hart Exp $
 *
 * Copyright (c) 1989-1999 Rogue Wave Software, Inc.  All Rights Reserved.
 *
 * This computer software is owned by Rogue Wave Software, Inc. and is
 * protected by U.S. copyright laws and other laws and by international
 * treaties.  This computer software is furnished by Rogue Wave Software,
 * Inc. pursuant to a written license agreement and may be used, copied,
 * transmitted, and stored only in accordance with the terms of such
 * license and with the inclusion of the above copyright notice.  This
 * computer software or any other copies thereof may not be provided or
 * otherwise made available to any other person.
 *
 * U.S. Government Restricted Rights.  This computer software is provided
 * with Restricted Rights.  Use, duplication, or disclosure by the
 * Government is subject to restrictions as set forth in subparagraph (c)
 * (1) (ii) of The Rights in Technical Data and Computer Software clause
 * at DFARS 252.227-7013 or subparagraphs (c) (1) and (2) of the
 * Commercial Computer Software – Restricted Rights at 48 CFR 52.227-19,
 * as applicable.  Manufacturer is Rogue Wave Software, Inc., 5500
 * Flatiron Parkway, Boulder, Colorado 80301 USA.
 *
 ***************************************************************************
 */

#include "rw/filemgr.h"
#include "rw/rstream.h"


struct DiskNode {
  int      data;
  RWoffset nextNode;
};

int main()
{
  /*                                                                                   
   * If we're using the Standard C++ Library and the iostream operators             
   * are in the std namespace, we need to pull in namespace std, or                 
   * scope the operator with std::.                                                 
   */                                                                               
#if !defined(RW_NO_STL) && !defined(RW_NO_STD_NAMESPACE) && !defined(RW_NO_IOSTD)   
  using namespace std;                                                              
#endif
  /*
   *  borland 4 needs the std namespace
   */
#if defined(RW_BCB_NAMESPACE) 
  using namespace std;
#endif
  RWFileManager fm("linklist.dat");

  // The constructor for RWFileManager will create a file if it does not
  // already exist.  "(fm.start() == RWNIL)" is used to prevent errors
  // caused by trying to read the linked list file before it is created.

  if(fm.start() == RWNIL)
     cerr << "You must create a linked list file using fmgrsave.exe\n"
          << "before you run this program.\n\n ";
  else
  {  
     fm.SeekTo(fm.start());
     RWoffset next;
     fm.Read(next);
  
     DiskNode n;
     while (next != RWNIL) {
       fm.SeekTo(next);
       fm.Read(n.data);
       fm.Read(n.nextNode);
       cout << n.data << "\n";
       next = n.nextNode;
     }
     cout.flush();
  }
 return 0;
}