ogrs57datasource.cpp

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/******************************************************************************
 * $Id: ogrs57datasource.cpp 10646 2007-01-18 02:38:10Z warmerdam $
 *
 * 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.
 ****************************************************************************/

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

CPL_CVSID("$Id: ogrs57datasource.cpp 10646 2007-01-18 02:38:10Z warmerdam $");

/************************************************************************/
/*                          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 );

    poSpatialRef->Release();

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

        VSIFCloseL( 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) );
                                              
    if( GetOption(S57O_RETURN_DSID) != NULL )
        papszReaderOptions = 
            CSLSetNameValue( papszReaderOptions, S57O_RETURN_DSID,
                             GetOption(S57O_RETURN_DSID) );
                                              
    poModule->SetOptions( papszReaderOptions );
    CSLDestroy( papszReaderOptions );

/* -------------------------------------------------------------------- */
/*      Try opening.                                                    */
/*                                                                      */
/*      Eventually this should check for catalogs, and if found         */
/*      instantiate a whole series of modules.                          */
/* -------------------------------------------------------------------- */
    if( !poModule->Open( bTestOpen ) )
    {
        delete poModule;

        return FALSE;
    }

    nModules = 1;
    papoModules = (S57Reader **) CPLMalloc(sizeof(void*));
    papoModules[0] = poModule;
    
/* -------------------------------------------------------------------- */
/*      Add the header layers if they are called for.                   */
/* -------------------------------------------------------------------- */
    if( GetOption( S57O_RETURN_DSID ) == NULL 
        || CSLTestBoolean(GetOption( S57O_RETURN_DSID )) )
    {
        OGRFeatureDefn  *poDefn;

        poDefn = S57GenerateDSIDFeatureDefn();
        AddLayer( new OGRS57Layer( this, poDefn ) );
    }

/* -------------------------------------------------------------------- */
/*      Add the primitive layers if they are called for.                */
/* -------------------------------------------------------------------- */
    if( GetOption( S57O_RETURN_PRIMITIVES ) != NULL )
    {
        OGRFeatureDefn  *poDefn;

        poDefn = S57GenerateVectorPrimitiveFeatureDefn( RCNM_VI, poModule->GetOptionFlags());
        AddLayer( new OGRS57Layer( this, poDefn ) );

        poDefn = S57GenerateVectorPrimitiveFeatureDefn( RCNM_VC, poModule->GetOptionFlags());
        AddLayer( new OGRS57Layer( this, poDefn ) );

        poDefn = S57GenerateVectorPrimitiveFeatureDefn( RCNM_VE, poModule->GetOptionFlags());