C++ DDFModule类代码示例

int main( int nArgc, char ** papszArgv )

{
    DDFModule   oModule;
    const char  *pszFilename;
    int         i;

    if( nArgc > 1 )
        pszFilename = papszArgv[1];
    else
    {
        printf( "Usage: 8211view filename\n" );
        exit( 1 );
    }

    for( i = 0; i < 40; i++ )
    {
/* -------------------------------------------------------------------- */
/*      Open the file.  Note that by default errors are reported to     */
/*      stderr, so we don't bother doing it ourselves.                  */
/* -------------------------------------------------------------------- */
        if( !oModule.Open( pszFilename ) )
        {
            exit( 1 );
        }

/* -------------------------------------------------------------------- */
/*      Loop reading records till there are none left.                  */
/* -------------------------------------------------------------------- */
        DDFRecord       *poRecord;
        int             nRecordCount = 0;
        int             nFieldCount = 0;
            
    
        while( (poRecord = oModule.ReadRecord()) != NULL )
        {
            /* ------------------------------------------------------------ */
            /*      Loop over each field in this particular record.         */
            /* ------------------------------------------------------------ */
            for( int iField = 0; iField < poRecord->GetFieldCount(); iField++ )
            {
                DDFField        *poField = poRecord->GetField( iField );

                ViewRecordField( poField );

                nFieldCount++;
            }

            nRecordCount++;
        }

        oModule.Close();

        printf( "Read %d records, %d fields.\n", nRecordCount, nFieldCount );
    }
}

DDFModule *SDTSTransfer::GetLayerModuleReader( int iEntry )

{
    if( iEntry < 0 || iEntry >= nLayers )
    {
        return nullptr;
    }

    DDFModule *poModuleReader = new DDFModule;

    if( !poModuleReader->Open(
                        oCATD.GetEntryFilePath( panLayerCATDEntry[iEntry] ) ) )
    {
        panLayerCATDEntry[iEntry] = SLTUnknown; // to prevent further attempt
        delete poModuleReader;
        return nullptr;
    }

    return poModuleReader;
}

int SDTS_XREF::Read( const char * pszFilename )

{
    DDFModule   oXREFFile;
    DDFRecord   *poRecord;

/* -------------------------------------------------------------------- */
/*      Open the file, and read the header.                             */
/* -------------------------------------------------------------------- */
    if( !oXREFFile.Open( pszFilename ) )
        return FALSE;
    
/* -------------------------------------------------------------------- */
/*      Read the first record, and verify that this is an XREF record.  */
/* -------------------------------------------------------------------- */
    poRecord = oXREFFile.ReadRecord();
    if( poRecord == NULL )
        return FALSE;

    if( poRecord->GetStringSubfield( "XREF", 0, "MODN", 0 ) == NULL )
        return FALSE;

/* -------------------------------------------------------------------- */
/*      Read fields of interest.                                        */
/* -------------------------------------------------------------------- */

    CPLFree( pszSystemName );
    pszSystemName = 
        CPLStrdup( poRecord->GetStringSubfield( "XREF", 0, "RSNM", 0 ) );

    CPLFree( pszDatum );
    pszDatum = 
        CPLStrdup( poRecord->GetStringSubfield( "XREF", 0, "HDAT", 0 ) );

    nZone = poRecord->GetIntSubfield( "XREF", 0, "ZONE", 0 );

    return TRUE;
}

DDFModule *SDTSTransfer::GetLayerModuleReader( int iEntry )

{
    DDFModule   *poModuleReader;
    
    if( iEntry < 0 || iEntry >= nLayers )
    {
        return NULL;
    }

    
    poModuleReader = new DDFModule;
    
    if( !poModuleReader->Open(
                        oCATD.GetEntryFilePath( panLayerCATDEntry[iEntry] ) ) )
    {
        delete poModuleReader;
        return NULL;
    }
    else
    {
        return poModuleReader;
    }
}

//.........这里部分代码省略.........
    poDS->poRL = poRL;
    
/* -------------------------------------------------------------------- */
/*      Capture some information from the file that is of interest.     */
/* -------------------------------------------------------------------- */
    poDS->nRasterXSize = poRL->GetXSize();
    poDS->nRasterYSize = poRL->GetYSize();
    
/* -------------------------------------------------------------------- */
/*      Create band information objects.                                */
/* -------------------------------------------------------------------- */
    poDS->nBands = 1;
    poDS->papoBands = (GDALRasterBand **)
        VSICalloc(sizeof(GDALRasterBand *),poDS->nBands);

    for( i = 0; i < poDS->nBands; i++ )
        poDS->SetBand( i+1, new SDTSRasterBand( poDS, i+1, poRL ) );

/* -------------------------------------------------------------------- */
/*      Try to establish the projection string.  For now we only        */
/*      support UTM and GEO.                                            */
/* -------------------------------------------------------------------- */
    OGRSpatialReference   oSRS;
    SDTS_XREF   *poXREF = poTransfer->GetXREF();

    if( EQUAL(poXREF->pszSystemName,"UTM") )
    {									
        oSRS.SetUTM( poXREF->nZone );
    }
    else if( EQUAL(poXREF->pszSystemName,"GEO") )
    {
        /* we set datum later */
    }
    else
        oSRS.SetLocalCS( poXREF->pszSystemName );

    if( oSRS.IsLocal() )
        /* don't try to set datum. */;
    else if( EQUAL(poXREF->pszDatum,"NAS") )
        oSRS.SetWellKnownGeogCS( "NAD27" );
    else if( EQUAL(poXREF->pszDatum, "NAX") )
        oSRS.SetWellKnownGeogCS( "NAD83" );
    else if( EQUAL(poXREF->pszDatum, "WGC") )
        oSRS.SetWellKnownGeogCS( "WGS72" );
    else if( EQUAL(poXREF->pszDatum, "WGE") )
        oSRS.SetWellKnownGeogCS( "WGS84" );
    else
        oSRS.SetWellKnownGeogCS( "WGS84" );

    oSRS.Fixup();

    poDS->pszProjection = NULL;
    if( oSRS.exportToWkt( &poDS->pszProjection ) != OGRERR_NONE )
        poDS->pszProjection = CPLStrdup("");


/* -------------------------------------------------------------------- */
/*      Get metadata from the IDEN file.                                */
/* -------------------------------------------------------------------- */
    const char* pszIDENFilePath = poTransfer->GetCATD()->GetModuleFilePath("IDEN");
    if (pszIDENFilePath)
    {
        DDFModule   oIDENFile;
        if( oIDENFile.Open( pszIDENFilePath ) )
        {
            DDFRecord* poRecord;

            while( (poRecord = oIDENFile.ReadRecord()) != NULL )
            {

                if( poRecord->GetStringSubfield( "IDEN", 0, "MODN", 0 ) == NULL )
                    continue;

                static const char* fields[][2] = { { "TITL", "TITLE" },
                                                   { "DAID", "DATASET_ID" },
                                                   { "DAST", "DATA_STRUCTURE" },
                                                   { "MPDT", "MAP_DATE" },
                                                   { "DCDT", "DATASET_CREATION_DATE" } };

                for (i = 0; i < (int)sizeof(fields) / (int)sizeof(fields[0]) ; i++)
                {
                    const char* pszFieldValue =
                            poRecord->GetStringSubfield( "IDEN", 0, fields[i][0], 0 );
                    if ( pszFieldValue )
                        poDS->SetMetadataItem(fields[i][1], pszFieldValue);
                }

                break;
            }
        }
    }

/* -------------------------------------------------------------------- */
/*      Initialize any PAM information.                                 */
/* -------------------------------------------------------------------- */
    poDS->SetDescription( poOpenInfo->pszFilename );
    poDS->TryLoadXML();

    return( poDS );
}

int main( int nArgc, char ** papszArgv )

{
    DDFModule   oModule;
    const char  *pszFilename = NULL;
    int         bFSPTHack = FALSE;
    int         bXML = FALSE;

/* -------------------------------------------------------------------- */
/*      Check arguments.                                                */
/* -------------------------------------------------------------------- */
    for( int iArg = 1; iArg < nArgc; iArg++ )
    {
        if( EQUAL(papszArgv[iArg],"-fspt_repeating") )
            bFSPTHack = TRUE;
        else if( EQUAL(papszArgv[iArg],"-xml") )
            bXML = TRUE;
        else
            pszFilename = papszArgv[iArg];
    }

    if( pszFilename == NULL )
    {
        printf( "Usage: 8211dump [-xml] [-fspt_repeating] filename\n" );
        exit( 1 );
    }

/* -------------------------------------------------------------------- */
/*      Open file.                                                      */
/* -------------------------------------------------------------------- */
    if( !oModule.Open( pszFilename ) )
        exit( 1 );

/* -------------------------------------------------------------------- */
/*      Apply FSPT hack if required.                                    */
/* -------------------------------------------------------------------- */
    if( bFSPTHack )
    {
        DDFFieldDefn *poFSPT = oModule.FindFieldDefn( "FSPT" );

        if( poFSPT == NULL )
            fprintf( stderr, 
                     "unable to find FSPT field to set repeating flag.\n" );
        else
            poFSPT->SetRepeatingFlag( TRUE );
    }

/* -------------------------------------------------------------------- */
/*      Dump header, and all records.                                   */
/* -------------------------------------------------------------------- */
    DDFRecord       *poRecord;
    if( bXML )
    {
        printf("<DDFModule>\n");

        int nFieldDefnCount = oModule.GetFieldCount();
        for( int i = 0; i < nFieldDefnCount; i++ )
        {
            DDFFieldDefn* poFieldDefn = oModule.GetField(i);
            const char* pszDataStructCode;
            switch( poFieldDefn->GetDataStructCode() )
            {
                case dsc_elementary:
                    pszDataStructCode = "elementary";
                    break;
                    
                case dsc_vector:
                    pszDataStructCode = "vector";
                    break;
                    
                case dsc_array:
                    pszDataStructCode = "array";
                    break;
                    
                case dsc_concatenated:
                    pszDataStructCode = "concatenated";
                    break;
                    
                default:
                    pszDataStructCode = "(unknown)";
                    break;
            }

            const char* pszDataTypeCode;
            switch( poFieldDefn->GetDataTypeCode() )
            {
                case dtc_char_string:
                    pszDataTypeCode = "char_string";
                    break;
                    
                case dtc_implicit_point:
                    pszDataTypeCode = "implicit_point";
                    break;
                    
                case dtc_explicit_point:
                    pszDataTypeCode = "explicit_point";
                    break;
                    
                case dtc_explicit_point_scaled:
                    pszDataTypeCode = "explicit_point_scaled";
//.........这里部分代码省略.........

void mk_s57()

{
    DDFModule  oModule;
    DDFFieldDefn *poFDefn;

    oModule.Initialize();

/* -------------------------------------------------------------------- */
/*      Create the '0000' definition.                                   */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "0000", "", "0001DSIDDSIDDSSI0001DSPM0001VRIDVRIDATTVVRIDVRPCVRIDVRPTVRIDSGCCVRIDSG2DVRIDSG3D0001FRIDFRIDFOIDFRIDATTFFRIDNATFFRIDFFPCFRIDFFPTFRIDFSPCFRIDFSPT", dsc_elementary, dtc_char_string );

    oModule.AddField( poFDefn );

/* -------------------------------------------------------------------- */
/*      Create the '0001' definition.                                   */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "0001", "ISO 8211 Record Identifier", "",
                     dsc_elementary, dtc_bit_string,
                     "(b12)" );

    oModule.AddField( poFDefn );

/* -------------------------------------------------------------------- */
/*      Create the DSID field.                                          */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "DSID", "Data set identification field", "",
                     dsc_vector, dtc_mixed_data_type );

    poFDefn->AddSubfield( "RCNM", "b11" );
    poFDefn->AddSubfield( "RCID", "b14" );
    poFDefn->AddSubfield( "EXPP", "b11" );
    poFDefn->AddSubfield( "INTU", "b11" );
    poFDefn->AddSubfield( "DSNM", "A" );
    poFDefn->AddSubfield( "EDTN", "A" );
    poFDefn->AddSubfield( "UPDN", "A" );
    poFDefn->AddSubfield( "UADT", "A(8)" );
    poFDefn->AddSubfield( "ISDT", "A(8)" );
    poFDefn->AddSubfield( "STED", "R(4)" );
    poFDefn->AddSubfield( "PRSP", "b11" );
    poFDefn->AddSubfield( "PSDN", "A" );
    poFDefn->AddSubfield( "PRED", "A" );
    poFDefn->AddSubfield( "PROF", "b11" );
    poFDefn->AddSubfield( "AGEN", "b12" );
    poFDefn->AddSubfield( "COMT", "A" );

    oModule.AddField( poFDefn );

/* -------------------------------------------------------------------- */
/*      Create the DSSI field.                                          */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "DSSI", "Data set structure information field", "",
                     dsc_vector, dtc_mixed_data_type );

    poFDefn->AddSubfield( "DSTR", "b11" );
    poFDefn->AddSubfield( "AALL", "b11" );
    poFDefn->AddSubfield( "NALL", "b11" );
    poFDefn->AddSubfield( "NOMR", "b14" );
    poFDefn->AddSubfield( "NOCR", "b14" );
    poFDefn->AddSubfield( "NOGR", "b14" );
    poFDefn->AddSubfield( "NOLR", "b14" );
    poFDefn->AddSubfield( "NOIN", "b14" );
    poFDefn->AddSubfield( "NOCN", "b14" );
    poFDefn->AddSubfield( "NOED", "b14" );
    poFDefn->AddSubfield( "NOFA", "b14" );

    oModule.AddField( poFDefn );

/* -------------------------------------------------------------------- */
/*      Create the DSPM field.                                          */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "DSPM", "Data set parameter field", "",
                     dsc_vector, dtc_mixed_data_type );

    poFDefn->AddSubfield( "RCNM", "b11" );
    poFDefn->AddSubfield( "RCID", "b14" );
    poFDefn->AddSubfield( "HDAT", "b11" );
    poFDefn->AddSubfield( "VDAT", "b11" );
    poFDefn->AddSubfield( "SDAT", "b11" );
    poFDefn->AddSubfield( "CSCL", "b14" );
    poFDefn->AddSubfield( "DUNI", "b11" );
    poFDefn->AddSubfield( "HUNI", "b11" );
    poFDefn->AddSubfield( "PUNI", "b11" );
    poFDefn->AddSubfield( "COUN", "b11" );
    poFDefn->AddSubfield( "COMF", "b14" );
    poFDefn->AddSubfield( "SOMF", "b14" );
    poFDefn->AddSubfield( "COMT", "A" );

    oModule.AddField( poFDefn );
//.........这里部分代码省略.........

void mk_catalog()

{
    DDFModule  oModule;
    DDFFieldDefn *poFDefn;

    oModule.Initialize();

/* -------------------------------------------------------------------- */
/*      Create the '0000' definition.                                   */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "0000", "", "0001CATD",
                     dsc_elementary,
                     dtc_char_string );

    oModule.AddField( poFDefn );

/* -------------------------------------------------------------------- */
/*      Create the '0000' definition.                                   */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "0001", "ISO 8211 Record Identifier", "",
                     dsc_elementary, dtc_bit_string,
                     "(b12)" );

    oModule.AddField( poFDefn );

/* -------------------------------------------------------------------- */
/*      Create the CATD field.                                          */
/* -------------------------------------------------------------------- */
    poFDefn = new DDFFieldDefn();

    poFDefn->Create( "CATD", "Catalog Directory field", "",
                     dsc_vector, dtc_mixed_data_type );

    poFDefn->AddSubfield( "RCNM", "A(2)" );
    poFDefn->AddSubfield( "RCID", "I(10)" );
    poFDefn->AddSubfield( "FILE", "A" );
    poFDefn->AddSubfield( "LFIL", "A" );
    poFDefn->AddSubfield( "VOLM", "A" );
    poFDefn->AddSubfield( "IMPL", "A(3)" );
    poFDefn->AddSubfield( "SLAT", "R" );
    poFDefn->AddSubfield( "WLON", "R" );
    poFDefn->AddSubfield( "NLAT", "R" );
    poFDefn->AddSubfield( "ELON", "R" );
    poFDefn->AddSubfield( "CRCS", "A" );
    poFDefn->AddSubfield( "COMT", "A" );

    oModule.AddField( poFDefn );

    oModule.Dump( stdout );

    oModule.Create( "out.ddf" );

/* -------------------------------------------------------------------- */
/*      Create a record.                                                */
/* -------------------------------------------------------------------- */
    DDFRecord *poRec = new DDFRecord( &oModule );
    DDFField *poField;

    poField = poRec->AddField( oModule.FindFieldDefn( "0001" ) );
    poRec->SetFieldRaw( poField, 0, "\0\0\036", 3 );

    poField = poRec->AddField( oModule.FindFieldDefn( "CATD" ) );
    poRec->SetStringSubfield( "CATD", 0, "RCNM", 0, "CD" );
    poRec->SetIntSubfield   ( "CATD", 0, "RCID", 0, 1 );
    poRec->SetStringSubfield( "CATD", 0, "FILE", 0, "CATALOG.030" );
    poRec->SetStringSubfield( "CATD", 0, "VOLM", 0, "V01X01" );
    poRec->SetStringSubfield( "CATD", 0, "IMPL", 0, "ASC" );
    poRec->SetStringSubfield( "CATD", 0, "COMT", 0,
                              "Exchange Set Catalog file" );
    poRec->Write();
    delete poRec;

/* -------------------------------------------------------------------- */
/*      Create a record.                                                */
/* -------------------------------------------------------------------- */
    poRec = new DDFRecord( &oModule );

    poField = poRec->AddField( oModule.FindFieldDefn( "0001" ) );
    poRec->SetFieldRaw( poField, 0, "\1\0\036", 3 );

    poField = poRec->AddField( oModule.FindFieldDefn( "CATD" ) );
    poRec->SetStringSubfield( "CATD", 0, "RCNM", 0, "CD" );
    poRec->SetIntSubfield   ( "CATD", 0, "RCID", 0, 2 );
    poRec->SetStringSubfield( "CATD", 0, "FILE", 0, "No410810.000" );
    poRec->SetStringSubfield( "CATD", 0, "VOLM", 0, "V01X01" );
    poRec->SetStringSubfield( "CATD", 0, "IMPL", 0, "BIN" );
    poRec->SetFloatSubfield ( "CATD", 0, "SLAT", 0, 59.000005 );
    poRec->SetFloatSubfield ( "CATD", 0, "WLON", 0, 4.999996 );
    poRec->SetFloatSubfield ( "CATD", 0, "NLAT", 0, 59.500003 );
    poRec->SetFloatSubfield ( "CATD", 0, "ELON", 0, 5.499997 );
    poRec->SetStringSubfield( "CATD", 0, "CRCS", 0, "555C3AD4" );
    poRec->Write();
    delete poRec;
}

int SDTSRasterReader::Open( SDTS_CATD * poCATD, SDTS_IREF * poIREF,
                            const char * pszModule )

{
    strncpy( szModule, pszModule, sizeof(szModule) );
    szModule[sizeof(szModule) - 1] = '\0';
    
/* ==================================================================== */
/*      Search the LDEF module for the requested cell module.           */
/* ==================================================================== */
    DDFModule   oLDEF;
    DDFRecord   *poRecord;

/* -------------------------------------------------------------------- */
/*      Open the LDEF module, and report failure if it is missing.      */
/* -------------------------------------------------------------------- */
    if( poCATD->GetModuleFilePath("LDEF") == NULL )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Can't find LDEF entry in CATD module ... "
                  "can't treat as raster.\n" );
        return FALSE;
    }
    
    if( !oLDEF.Open( poCATD->GetModuleFilePath("LDEF") ) )
        return FALSE;

/* -------------------------------------------------------------------- */
/*      Read each record, till we find what we want.                    */
/* -------------------------------------------------------------------- */
    while( (poRecord = oLDEF.ReadRecord() ) != NULL )
    {
        const char* pszCandidateModule = poRecord->GetStringSubfield("LDEF",0,"CMNM",0);
        if( pszCandidateModule == NULL )
        {
            poRecord = NULL;
            break;
        }
        if( EQUAL(pszCandidateModule, pszModule) )
            break;
    }

    if( poRecord == NULL )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Can't find module `%s' in LDEF file.\n",
                  pszModule );
        return FALSE;
    }
    
/* -------------------------------------------------------------------- */
/*      Extract raster dimensions, and origin offset (0/1).             */
/* -------------------------------------------------------------------- */
    nXSize = poRecord->GetIntSubfield( "LDEF", 0, "NCOL", 0 );
    nYSize = poRecord->GetIntSubfield( "LDEF", 0, "NROW", 0 );

    nXStart = poRecord->GetIntSubfield( "LDEF", 0, "SOCI", 0 );
    nYStart = poRecord->GetIntSubfield( "LDEF", 0, "SORI", 0 );

/* -------------------------------------------------------------------- */
/*      Get the point in the pixel that the origin defines.  We only    */
/*      support top left and center.                                    */
/* -------------------------------------------------------------------- */
    const char* pszINTR = poRecord->GetStringSubfield(  "LDEF", 0, "INTR", 0 );
    if( pszINTR == NULL )
    {
        CPLError( CE_Failure, CPLE_AppDefined, "Can't find INTR subfield of LDEF field" );
        return FALSE;
    }
    strcpy( szINTR, pszINTR );
    if( EQUAL(szINTR,"") )
        strcpy( szINTR, "CE" );
    
    if( !EQUAL(szINTR,"CE") && !EQUAL(szINTR,"TL") )
    {
        CPLError( CE_Warning, CPLE_AppDefined,
                  "Unsupported INTR value of `%s', assume CE.\n"
                  "Positions may be off by one pixel.\n",
                  szINTR );
        strcpy( szINTR, "CE" );
    }

/* -------------------------------------------------------------------- */
/*      Record the LDEF record number we used so we can find the        */
/*      corresponding RSDF record.                                      */
/* -------------------------------------------------------------------- */
    int         nLDEF_RCID;

    nLDEF_RCID = poRecord->GetIntSubfield( "LDEF", 0, "RCID", 0 );
    
    oLDEF.Close();

/* ==================================================================== */
/*      Search the RSDF module for the requested cell module.           */
/* ==================================================================== */
    DDFModule   oRSDF;

/* -------------------------------------------------------------------- */
/*      Open the RSDF module, and report failure if it is missing.      */
/* -------------------------------------------------------------------- */
//.........这里部分代码省略.........

int main( int nArgc, char ** papszArgv )

{
    DDFModule   oModule;
    const char  *pszFilename = nullptr;
    int         bFSPTHack = FALSE;

    for( int iArg = 1; iArg < nArgc; iArg++ )
    {
        if( EQUAL(papszArgv[iArg],"-fspt_repeating") )
            bFSPTHack = TRUE;
        else
            pszFilename = papszArgv[iArg];
    }

    if( pszFilename == nullptr )
    {
        printf( "Usage: 8211view filename\n" );
        exit( 1 );
    }

/* -------------------------------------------------------------------- */
/*      Open the file.  Note that by default errors are reported to     */
/*      stderr, so we don't bother doing it ourselves.                  */
/* -------------------------------------------------------------------- */
    if( !oModule.Open( pszFilename ) )
    {
        exit( 1 );
    }

    if( bFSPTHack )
    {
        DDFFieldDefn *poFSPT = oModule.FindFieldDefn( "FSPT" );

        if( poFSPT == nullptr )
            fprintf( stderr,
                     "unable to find FSPT field to set repeating flag.\n" );
        else
            poFSPT->SetRepeatingFlag( TRUE );
    }

/* -------------------------------------------------------------------- */
/*      Loop reading records till there are none left.                  */
/* -------------------------------------------------------------------- */
    DDFRecord *poRecord = nullptr;
    int iRecord = 0;

    while( (poRecord = oModule.ReadRecord()) != nullptr )
    {
        printf( "Record %d (%d bytes)\n",
                ++iRecord, poRecord->GetDataSize() );

        /* ------------------------------------------------------------ */
        /*      Loop over each field in this particular record.         */
        /* ------------------------------------------------------------ */
        for( int iField = 0; iField < poRecord->GetFieldCount(); iField++ )
        {
            DDFField    *poField = poRecord->GetField( iField );

            ViewRecordField( poField );
        }
    }
}

int main(int nArgc, char* papszArgv[])
{
    const char  *pszFilename = NULL, *pszOutFilename = NULL;
    DDFModule  oModule;

/* -------------------------------------------------------------------- */
/*      Check arguments.                                                */
/* -------------------------------------------------------------------- */
    for( int iArg = 1; iArg < nArgc; iArg++ )
    {
        if( pszFilename == NULL )
            pszFilename = papszArgv[iArg];
        else if( pszOutFilename == NULL )
            pszOutFilename = papszArgv[iArg];
        else
        {
            pszFilename = NULL;
            break;
        }
    }

    if( pszFilename == NULL )
    {
        printf( "Usage: 8211createfromxml filename.xml outfilename\n" );
        exit( 1 );
    }

    CPLXMLNode* poRoot = CPLParseXMLFile( pszFilename );
    if( poRoot == NULL )
    {
        fprintf(stderr, "Cannot parse XML file '%s'\n", pszFilename);
        exit( 1 );
    }

    CPLXMLNode* poXMLDDFModule = CPLSearchXMLNode(poRoot, "=DDFModule");
    if( poXMLDDFModule == NULL )
    {
        fprintf(stderr, "Cannot find DDFModule node in XML file '%s'\n", pszFilename);
        exit( 1 );
    }

    /* Compute the size of the DDFField tag */
    CPLXMLNode* psIter = poXMLDDFModule->psChild;
    int nSizeFieldTag = 0;
    while( psIter != NULL )
    {
        if( psIter->eType == CXT_Element &&
            strcmp(psIter->pszValue, "DDFFieldDefn") == 0 )
        {
            const char* pszTag = CPLGetXMLValue(psIter, "tag", "");
            if( nSizeFieldTag == 0 )
                nSizeFieldTag = (int)strlen(pszTag);
            else if( nSizeFieldTag != (int)strlen(pszTag) )
            {
                fprintf(stderr, "All fields have not the same tag size\n");
                exit( 1 );
            }
        }
        psIter = psIter->psNext;
    }

    char chInterchangeLevel = '3';
    char chLeaderIden = 'L';
    char chCodeExtensionIndicator = 'E';
    char chVersionNumber = '1';
    char chAppIndicator = ' ';
    const char *pszExtendedCharSet = " ! ";
    int nSizeFieldLength = 3;
    int nSizeFieldPos = 4;

    chInterchangeLevel = CPLGetXMLValue(poXMLDDFModule, "_interchangeLevel", CPLSPrintf("%c", chInterchangeLevel))[0];
    chLeaderIden = CPLGetXMLValue(poXMLDDFModule, "_leaderIden", CPLSPrintf("%c", chLeaderIden))[0];
    chCodeExtensionIndicator = CPLGetXMLValue(poXMLDDFModule, "_inlineCodeExtensionIndicator", CPLSPrintf("%c", chCodeExtensionIndicator))[0];
    chVersionNumber = CPLGetXMLValue(poXMLDDFModule, "_versionNumber", CPLSPrintf("%c", chVersionNumber))[0];
    chAppIndicator = CPLGetXMLValue(poXMLDDFModule, "_appIndicator", CPLSPrintf("%c", chAppIndicator))[0];
    char szExtendedCharSet[4];
    snprintf(szExtendedCharSet, sizeof(szExtendedCharSet), "%s", CPLGetXMLValue(poXMLDDFModule, "_extendedCharSet", pszExtendedCharSet));
    pszExtendedCharSet = szExtendedCharSet;
    nSizeFieldLength = atoi(CPLGetXMLValue(poXMLDDFModule, "_sizeFieldLength", CPLSPrintf("%d", nSizeFieldLength)));
    nSizeFieldPos = atoi(CPLGetXMLValue(poXMLDDFModule, "_sizeFieldPos", CPLSPrintf("%d", nSizeFieldPos)));
    nSizeFieldTag = atoi(CPLGetXMLValue(poXMLDDFModule, "_sizeFieldTag", CPLSPrintf("%d", nSizeFieldTag)));

    oModule.Initialize(chInterchangeLevel,
                       chLeaderIden,
                       chCodeExtensionIndicator,
                       chVersionNumber,
                       chAppIndicator,
                       pszExtendedCharSet,
                       nSizeFieldLength,
                       nSizeFieldPos,
                       nSizeFieldTag);
    oModule.SetFieldControlLength(atoi(CPLGetXMLValue(poXMLDDFModule, "_fieldControlLength", CPLSPrintf("%d", oModule.GetFieldControlLength()))));

    int bCreated = FALSE;

    /* Create DDFFieldDefn and DDFRecord elements */
    psIter = poXMLDDFModule->psChild;
    while( psIter != NULL )
    {
        if( psIter->eType == CXT_Element &&
//.........这里部分代码省略.........