ogrs57datasource.cpp

GIS系统支持库Geospatial Data Abstraction Library代码.GDAL is a translator library for raster geospatial dat

/******************************************************************************
 * $Id: ogrs57datasource.cpp,v 1.26 2004/08/30 20:11:51 warmerda Exp $
 *
 * Project:  S-57 Translator
 * Purpose:  Implements OGRS57DataSource class
 * Author:   Frank Warmerdam, [e-mail]
 *
 ******************************************************************************
 * Copyright (c) 1999, Frank Warmerdam
 *
 * 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: ogrs57datasource.cpp,v $
 * Revision 1.26  2004/08/30 20:11:51  warmerda
 * keep the S57ClassRegistrar on the driver, not the datasource
 *
 * Revision 1.25  2003/11/15 21:50:52  warmerda
 * Added limited creation support
 *
 * Revision 1.24  2003/11/12 21:24:12  warmerda
 * updates to new featuredefn generators
 *
 * Revision 1.23  2003/09/15 20:52:12  warmerda
 * added RETURN_LINKAGES
 *
 * Revision 1.22  2003/09/12 21:06:31  warmerda
 * use SetWellKnownGeogCS() to establish WGS84 SRS
 *
 * Revision 1.21  2003/09/05 19:12:05  warmerda
 * added RETURN_PRIMITIVES support to get low level prims
 *
 * Revision 1.20  2002/09/09 18:38:58  warmerda
 * Initialize module list.
 *
 * Revision 1.19  2002/09/09 18:20:58  warmerda
 * fixed serious leak ... S57Readers never destroyed!
 *
 * Revision 1.18  2002/05/14 21:33:30  warmerda
 * use macros for options, pass PRESERVE_EMPTY_NUMBERS opt
 *
 * Revision 1.17  2002/03/05 14:25:43  warmerda
 * expanded tabs
 *
 * Revision 1.16  2001/12/19 22:44:53  warmerda
 * added ADD_SOUNDG_DEPTH support
 *
 * Revision 1.15  2001/12/19 22:03:58  warmerda
 * iniitialize bExtentsSet
 *
 * Revision 1.14  2001/12/17 22:34:43  warmerda
 * ensure SPLIT_MULTIPOINT option is passed to S57Reader
 *
 * Revision 1.13  2001/12/14 19:40:18  warmerda
 * added optimized feature counting, and extents collection
 *
 * Revision 1.12  2001/11/21 14:35:44  warmerda
 * dont managed updates directly anymore
 *
 * Revision 1.11  2001/08/30 21:05:32  warmerda
 * added support for generic object if not recognised
 *
 * Revision 1.10  2001/08/30 03:48:43  warmerda
 * preliminary implementation of S57 Update Support
 *
 * Revision 1.9  2001/07/18 04:55:16  warmerda
 * added CPL_CSVID
 *
 * Revision 1.8  2000/06/16 18:10:05  warmerda
 * expanded tabs
 *
 * Revision 1.7  2000/06/07 20:50:58  warmerda
 * make CSV location configurable with env variable
 *
 * Revision 1.6  1999/11/29 14:04:53  warmerda
 * use LNAM_REFS
 *
 * Revision 1.5  1999/11/26 16:18:33  warmerda
 * OGRFeatureDefn generators no longer static
 *
 * Revision 1.4  1999/11/18 19:01:25  warmerda
 * expanded tabs
 *
 * Revision 1.3  1999/11/16 21:47:31  warmerda
 * updated class occurance collection
 *
 * Revision 1.2  1999/11/08 22:23:00  warmerda
 * added object class support
 *
 * Revision 1.1  1999/11/03 22:12:43  warmerda
 * New
 *
 */

#include "ogr_s57.h"
#include "cpl_conv.h"
#include "cpl_string.h"

CPL_CVSID("$Id: ogrs57datasource.cpp,v 1.26 2004/08/30 20:11:51 warmerda Exp $");

/************************************************************************/
/*                          OGRS57DataSource()                          */
/************************************************************************/

OGRS57DataSource::OGRS57DataSource()

{
    nLayers = 0;
    papoLayers = NULL;

    nModules = 0;
    papoModules = NULL;
    poWriter = NULL;

    pszName = NULL;

    poSpatialRef = new OGRSpatialReference();
    poSpatialRef->SetWellKnownGeogCS( "WGS84" );
    
    bExtentsSet = FALSE;


/* -------------------------------------------------------------------- */
/*      Allow initialization of options from the environment.           */
/* -------------------------------------------------------------------- */
    papszOptions = NULL;

    if( CPLGetConfigOption("OGR_S57_OPTIONS",NULL) != NULL )
    {
        papszOptions = 
            CSLTokenizeStringComplex( CPLGetConfigOption("OGR_S57_OPTIONS",""),
                                      ",", FALSE, FALSE );
    }
}

/************************************************************************/
/*                         ~OGRS57DataSource()                          */
/************************************************************************/

OGRS57DataSource::~OGRS57DataSource()

{
    int         i;

    for( i = 0; i < nLayers; i++ )
        delete papoLayers[i];

    CPLFree( papoLayers );

    for( i = 0; i < nModules; i++ )
        delete papoModules[i];
    CPLFree( papoModules );

    CPLFree( pszName );

    CSLDestroy( papszOptions );

    delete poSpatialRef;

    if( poWriter != NULL )
    {
        poWriter->Close();
        delete poWriter;
    }
}

/************************************************************************/
/*                           SetOptionList()                            */
/************************************************************************/

void OGRS57DataSource::SetOptionList( char ** papszNewOptions )

{
    CSLDestroy( papszOptions );
    papszOptions = CSLDuplicate( papszNewOptions );
}

/************************************************************************/
/*                             GetOption()                              */
/************************************************************************/

const char *OGRS57DataSource::GetOption( const char * pszOption )

{
    return CSLFetchNameValue( papszOptions, pszOption );
}

/************************************************************************/
/*                           TestCapability()                           */
/************************************************************************/

int OGRS57DataSource::TestCapability( const char * )

{
    return FALSE;
}

/************************************************************************/
/*                                Open()                                */
/************************************************************************/

int OGRS57DataSource::Open( const char * pszFilename, int bTestOpen )

{
    int         iModule;
    
    pszName = CPLStrdup( pszFilename );
    
/* -------------------------------------------------------------------- */
/*      Check a few bits of the header to see if it looks like an       */
/*      S57 file (really, if it looks like an ISO8211 file).            */
/* -------------------------------------------------------------------- */
    if( bTestOpen )
    {
        FILE    *fp;
        char    pachLeader[10];

        fp = VSIFOpen( pszFilename, "rb" );
        if( fp == NULL )
            return FALSE;
        
        if( VSIFRead( pachLeader, 1, 10, fp ) != 10
            || (pachLeader[5] != '1' && pachLeader[5] != '2'
                && pachLeader[5] != '3' )
            || pachLeader[6] != 'L'
            || (pachLeader[8] != '1' && pachLeader[8] != ' ') )
        {
            VSIFClose( fp );
            return FALSE;
        }

        VSIFClose( fp );
    }

/* -------------------------------------------------------------------- */
/*      Setup reader options.                                           */
/* -------------------------------------------------------------------- */
    char **papszReaderOptions = NULL;
    S57Reader   *poModule;

    poModule = new S57Reader( pszFilename );

    papszReaderOptions = CSLSetNameValue(papszReaderOptions, 
                                         S57O_LNAM_REFS, "ON" );
    if( GetOption(S57O_UPDATES) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_UPDATES, 
                             GetOption(S57O_UPDATES));
                                              
    if( GetOption(S57O_SPLIT_MULTIPOINT) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_SPLIT_MULTIPOINT,
                             GetOption(S57O_SPLIT_MULTIPOINT) );
                                              
    if( GetOption(S57O_ADD_SOUNDG_DEPTH) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_ADD_SOUNDG_DEPTH,
                             GetOption(S57O_ADD_SOUNDG_DEPTH));
                                              
    if( GetOption(S57O_PRESERVE_EMPTY_NUMBERS) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_PRESERVE_EMPTY_NUMBERS,
                             GetOption(S57O_PRESERVE_EMPTY_NUMBERS) );
                                              
    if( GetOption(S57O_RETURN_PRIMITIVES) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_RETURN_PRIMITIVES,
                             GetOption(S57O_RETURN_PRIMITIVES) );
                                              
    if( GetOption(S57O_RETURN_LINKAGES) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_RETURN_LINKAGES,
                             GetOption(S57O_RETURN_LINKAGES) );
                                              
    poModule->SetOptions( papszReaderOptions );
    CSLDestroy( papszReaderOptions );