mitab_imapinfofile.cpp

在linux环境下

/**********************************************************************
 * $Id: mitab_imapinfofile.cpp,v 1.19 2004/06/30 20:29:04 dmorissette Exp $
 *
 * Name:     mitab_imapinfo
 * Project:  MapInfo mid/mif Tab Read/Write library
 * Language: C++
 * Purpose:  Implementation of the IMapInfoFile class, super class of
 *           of MIFFile and TABFile
 * Author:   Daniel Morissette, [e-mail]
 *
 **********************************************************************
 * Copyright (c) 1999-2001, Daniel Morissette
 *
 * 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: mitab_imapinfofile.cpp,v $
 * Revision 1.19  2004/06/30 20:29:04  dmorissette
 * Fixed refs to old address [e-mail]
 *
 * Revision 1.18  2003/12/19 07:55:55  fwarmerdam
 * treat 3D features as 2D on write
 *
 * Revision 1.17  2001/09/14 19:14:43  warmerda
 * added attribute query support
 *
 * Revision 1.16  2001/09/14 03:23:55  warmerda
 * Substantial upgrade to support spatial queries using spatial indexes
 *
 * Revision 1.15  2001/07/03 23:11:21  daniel
 * Test for NULL geometries if spatial filter enabled in GetNextFeature().
 *
 * Revision 1.14  2001/03/09 04:16:02  daniel
 * Added TABSeamless for reading seamless TAB files
 *
 * Revision 1.13  2001/02/27 19:59:05  daniel
 * Enabled spatial filter in IMapInfoFile::GetNextFeature(), and avoid
 * unnecessary feature cloning in GetNextFeature() and GetFeature()
 *
 * Revision 1.12  2001/02/06 22:03:24  warmerda
 * fixed memory leak of whole features in CreateFeature
 *
 * Revision 1.11  2001/01/23 21:23:42  daniel
 * Added projection bounds lookup table, called from TABFile::SetProjInfo()
 *
 * Revision 1.10  2001/01/22 16:03:58  warmerda
 * expanded tabs
 *
 * Revision 1.9  2000/11/30 20:27:56  warmerda
 * make variable length string fields 254 wide, not 255
 *
 * Revision 1.8  2000/02/28 03:11:35  warmerda
 * fix support for zero width fields
 *
 * Revision 1.7  2000/02/02 20:14:03  warmerda
 * made safer when encountering geometryless features
 *
 * Revision 1.6  2000/01/26 18:17:35  warmerda
 * added CreateField method
 *
 * Revision 1.5  2000/01/15 22:30:44  daniel
 * Switch to MIT/X-Consortium OpenSource license
 *
 * Revision 1.4  2000/01/11 19:06:25  daniel
 * Added support for conversion of collections in CreateFeature()
 *
 * Revision 1.3  1999/12/14 02:14:50  daniel
 * Added static SmartOpen() method + TABView support
 *
 * Revision 1.2  1999/11/08 19:15:44  stephane
 * Add headers method
 *
 * Revision 1.1  1999/11/08 04:17:27  stephane
 * First Revision
 *
 **********************************************************************/

#include "mitab.h"
#include "mitab_utils.h"

#include <ctype.h>      /* isspace() */

/**********************************************************************
 *                   IMapInfoFile::IMapInfoFile()
 *
 * Constructor.
 **********************************************************************/
IMapInfoFile::IMapInfoFile()
{
    m_poFilterGeom = NULL;    
    m_nCurFeatureId = 0;
    m_poCurFeature = NULL;
    m_bBoundsSet = FALSE;
}


/**********************************************************************
 *                   IMapInfoFile::~IMapInfoFile()
 *
 * Destructor.
 **********************************************************************/
IMapInfoFile::~IMapInfoFile()
{
    if( m_poFilterGeom != NULL )
    {
        delete m_poFilterGeom;
        m_poFilterGeom = NULL;
    }

    if (m_poCurFeature)
    {
        delete m_poCurFeature;
        m_poCurFeature = NULL;
    }
}

/**********************************************************************
 *                   IMapInfoFile::SmartOpen()
 *
 * Use this static method to automatically open any flavour of MapInfo
 * dataset.  This method will detect the file type, create an object
 * of the right type, and open the file.
 *
 * Call GetFileClass() on the returned object if you need to find out
 * its exact type.  (To access format-specific methods for instance)
 *
 * Returns the new object ptr. , or NULL if the open failed.
 **********************************************************************/
IMapInfoFile *IMapInfoFile::SmartOpen(const char *pszFname,
                                      GBool bTestOpenNoError /*=FALSE*/)
{
    IMapInfoFile *poFile = NULL;
    int nLen = 0;

    if (pszFname)
        nLen = strlen(pszFname);

    if (nLen > 4 && (EQUAL(pszFname + nLen-4, ".MIF") ||
                     EQUAL(pszFname + nLen-4, ".MID") ) )
    {
        /*-------------------------------------------------------------
         * MIF/MID file
         *------------------------------------------------------------*/
        poFile = new MIFFile;
    }
    else if (nLen > 4 && EQUAL(pszFname + nLen-4, ".TAB"))
    {
        /*-------------------------------------------------------------
         * .TAB file ... is it a TABFileView or a TABFile?
         * We have to read the .tab header to find out.
         *------------------------------------------------------------*/
        FILE *fp;
        const char *pszLine;
        char *pszAdjFname = CPLStrdup(pszFname);
        GBool bFoundFields = FALSE, bFoundView=FALSE, bFoundSeamless=FALSE;

        TABAdjustFilenameExtension(pszAdjFname);
        fp = VSIFOpen(pszAdjFname, "r");
        while(fp && (pszLine = CPLReadLine(fp)) != NULL)
        {
            while (isspace(*pszLine))  pszLine++;
            if (EQUALN(pszLine, "Fields", 6))
                bFoundFields = TRUE;
            else if (EQUALN(pszLine, "create view", 11))
                bFoundView = TRUE;
            else if (EQUALN(pszLine, "\"\\IsSeamless\" = \"TRUE\"", 21))
                bFoundSeamless = TRUE;
        }

        if (bFoundView)
            poFile = new TABView;
        else if (bFoundFields && bFoundSeamless)
            poFile = new TABSeamless;
        else if (bFoundFields)
            poFile = new TABFile;

        if (fp)
            VSIFClose(fp);

        CPLFree(pszAdjFname);
    }

    /*-----------------------------------------------------------------
     * Perform the open() call
     *----------------------------------------------------------------*/
    if (poFile && poFile->Open(pszFname, "r", bTestOpenNoError) != 0)
    {
        delete poFile;
        poFile = NULL;
    }

    if (!bTestOpenNoError && poFile == NULL)
    {
        CPLError(CE_Failure, CPLE_FileIO,
                 "%s could not be opened as a MapInfo dataset.", pszFname);
    }

    return poFile;
}



/**********************************************************************
 *                   IMapInfoFile::GetNextFeature()
 *
 * Standard OGR GetNextFeature implementation.  This methode is used
 * to retreive the next OGRFeature.
 **********************************************************************/
OGRFeature *IMapInfoFile::GetNextFeature()
{