Create dgnopen.cpp

/******************************************************************************
 * $Id: dgnopen.cpp,v 1.17 2003/06/12 17:33:17 warmerda Exp $
 *
 * Project:  Microstation DGN Access Library
 * Purpose:  DGN Access Library file open code.
 * Author:   Frank Warmerdam, warmerdam@pobox.com
 *
 ******************************************************************************
 * Copyright (c) 2000, Avenza Systems Inc, http://www.avenza.com/
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ******************************************************************************
 *
 * $Log: dgnopen.cpp,v $
 * Revision 1.17  2003/06/12 17:33:17  warmerda
 * improved DNGO_CAPTURE_RAW_DATA flag documnentation
 *
 * Revision 1.16  2003/05/21 03:42:01  warmerda
 * Expanded tabs
 *
 * Revision 1.15  2003/05/12 18:48:57  warmerda
 * added preliminary 3D write support
 *
 * Revision 1.14  2002/04/22 20:44:41  warmerda
 * added (partial) cell library support
 *
 * Revision 1.13  2002/03/14 21:39:27  warmerda
 * added bUpdate to DGNOpen()
 *
 * Revision 1.12  2002/02/22 22:17:42  warmerda
 * Ensure that components of complex chain/shapes are spatially selected
 * based on the decision made for their owner (header).
 *
 * Revision 1.11  2002/01/21 20:52:11  warmerda
 * added SetSpatialFilter function
 *
 * Revision 1.10  2001/09/27 14:28:44  warmerda
 * first hack at 3D support
 *
 * Revision 1.9  2001/08/21 03:01:39  warmerda
 * added raw_data support
 *
 * Revision 1.8  2001/07/18 04:55:16  warmerda
 * added CPL_CSVID
 *
 * Revision 1.7  2001/06/27 16:14:21  warmerda
 * Free the element index on close (patch c/o Tom Parker, avs.com).
 *
 * Revision 1.6  2001/03/18 16:54:39  warmerda
 * added use of DGNTestOpen, remove extention test
 *
 * Revision 1.5  2001/03/07 13:56:44  warmerda
 * updated copyright to be held by Avenza Systems
 *
 * Revision 1.4  2001/01/10 16:13:09  warmerda
 * added documentation
 *
 * Revision 1.3  2000/12/28 21:28:59  warmerda
 * added element index support
 *
 * Revision 1.2  2000/12/14 17:10:57  warmerda
 * implemented TCB, Ellipse, TEXT
 *
 * Revision 1.1  2000/11/28 19:03:47  warmerda
 * New
 *
 */