C++ DDFSubfieldDefn::GetName方法代码示例

const char *DDFField::GetSubfieldData( DDFSubfieldDefn *poSFDefn,
                                       int *pnMaxBytes, int iSubfieldIndex )

{
    int         iOffset = 0;

    if( poSFDefn == NULL )
        return NULL;

    if( iSubfieldIndex > 0 && poDefn->GetFixedWidth() > 0 )
    {
        iOffset = poDefn->GetFixedWidth() * iSubfieldIndex;
        iSubfieldIndex = 0;
    }

    while( iSubfieldIndex >= 0 )
    {
        for( int iSF = 0; iSF < poDefn->GetSubfieldCount(); iSF++ )
        {
            int nBytesConsumed;
            DDFSubfieldDefn * poThisSFDefn = poDefn->GetSubfield( iSF );

            if( nDataSize < iOffset )
            {
                CPLError(CE_Failure, CPLE_AppDefined,
                         "Invalid data size for subfield %s of %s",
                         poThisSFDefn->GetName(), poDefn->GetName());
                return NULL;
            }

            if( poThisSFDefn == poSFDefn && iSubfieldIndex == 0 )
            {
                if( pnMaxBytes != NULL )
                    *pnMaxBytes = nDataSize - iOffset;

                return pachData + iOffset;
            }

            poThisSFDefn->GetDataLength( pachData+iOffset, nDataSize - iOffset,
                                         &nBytesConsumed);
            iOffset += nBytesConsumed;
        }

        iSubfieldIndex--;
    }

    // We didn't find our target subfield or instance!
    return NULL;
}

//.........这里部分代码省略.........
                    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";
                    break;
                    
                case dtc_char_bit_string:
                    pszDataTypeCode = "char_bit_string";
                    break;
                    
                case dtc_bit_string:
                    pszDataTypeCode = "bit_string";
                    break;
                    
                case dtc_mixed_data_type:
                    pszDataTypeCode = "mixed_data_type";
                    break;

                default:
                    pszDataTypeCode = "(unknown)";
                    break;
            }
            
            printf("<DDFFieldDefn tag=\"%s\" fieldName=\"%s\" arrayDescr=\"%s\" "
                   "formatControls=\"%s\" dataStructCode=\"%s\" dataTypeCode=\"%s\">\n",
                   poFieldDefn->GetName(),
                   poFieldDefn->GetDescription(),
                   poFieldDefn->GetArrayDescr(),
                   poFieldDefn->GetFormatControls(),
                   pszDataStructCode,
                   pszDataTypeCode);
            int nSubfieldCount = poFieldDefn->GetSubfieldCount();
            for( int iSubField = 0; iSubField < nSubfieldCount; iSubField++ )
            {
                DDFSubfieldDefn* poSubFieldDefn = poFieldDefn->GetSubfield(iSubField);
                printf("  <DDFSubfieldDefn name=\"%s\" format=\"%s\"/>\n",
                       poSubFieldDefn->GetName(), poSubFieldDefn->GetFormat());
            }
            printf("</DDFFieldDefn>\n");
        }

        for( poRecord = oModule.ReadRecord();
             poRecord != NULL; poRecord = oModule.ReadRecord() )
        {
            printf("<DDFRecord>\n");
            int nFieldCount = poRecord->GetFieldCount();
            for( int iField = 0; iField < nFieldCount; iField++ )
            {
                DDFField* poField = poRecord->GetField(iField);
                DDFFieldDefn* poDefn = poField->GetFieldDefn();
                const char* pszFieldName = poDefn->GetName();
                printf("  <DDFField name=\"%s\"", pszFieldName);
                if( poField->GetRepeatCount() > 1 )
                    printf(" repeatCount=\"%d\"", poField->GetRepeatCount());
                int iOffset = 0, nLoopCount;
                int nRepeatCount = poField->GetRepeatCount();
                const char* pachData = poField->GetData();
                int nDataSize = poField->GetDataSize();

static void
WriteAttrRecordToDBF( DBFHandle hDBF, int iRecord, 
                      SDTSTransfer * poTransfer, DDFField * poSR )

{
/* -------------------------------------------------------------------- */
/*      Process each subfield in the record.                            */
/* -------------------------------------------------------------------- */
    DDFFieldDefn        *poFDefn = poSR->GetFieldDefn();
        
    for( int iSF=0; iSF < poFDefn->GetSubfieldCount(); iSF++ )
    {
        DDFSubfieldDefn *poSFDefn = poFDefn->GetSubfield( iSF );
        int                     iField;
        int                     nMaxBytes;
        const char *    pachData = poSR->GetSubfieldData(poSFDefn,
                                                         &nMaxBytes);

/* -------------------------------------------------------------------- */
/*      Identify the related DBF field, if any.                         */
/* -------------------------------------------------------------------- */
        for( iField = 0; iField < hDBF->nFields; iField++ )
        {
            if( EQUALN(poSFDefn->GetName(),
                       hDBF->pszHeader+iField*32,10) )
                break;
        }

        if( iField == hDBF->nFields )
            iField = -1;
            
/* -------------------------------------------------------------------- */
/*      Handle each of the types.                                       */
/* -------------------------------------------------------------------- */
        switch( poSFDefn->GetType() )
        {
          case DDFString:
            const char  *pszValue;

            pszValue = poSFDefn->ExtractStringData(pachData, nMaxBytes,
                                                   NULL);

            if( iField != -1 )
                DBFWriteStringAttribute(hDBF, iRecord, iField, pszValue );
            break;

          case DDFFloat:
            double      dfValue;

            dfValue = poSFDefn->ExtractFloatData(pachData, nMaxBytes,
                                                 NULL);

            if( iField != -1 )
                DBFWriteDoubleAttribute( hDBF, iRecord, iField, dfValue );
            break;

          case DDFInt:
            int         nValue;

            nValue = poSFDefn->ExtractIntData(pachData, nMaxBytes, NULL);

            if( iField != -1 )
                DBFWriteIntegerAttribute( hDBF, iRecord, iField, nValue );
            break;

          default:
            break;
        }
    } /* next subfield */
}

static void
AddPrimaryAttrToDBFSchema( DBFHandle hDBF, SDTSTransfer *poTransfer,
                           char ** papszModuleList )

{
    for( int iModule = 0;
         papszModuleList != NULL && papszModuleList[iModule] != NULL;
         iModule++ )
    {
        SDTSAttrReader  *poAttrReader;

/* -------------------------------------------------------------------- */
/*      Get a reader on the desired module.                             */
/* -------------------------------------------------------------------- */
        poAttrReader = (SDTSAttrReader *)
            poTransfer->GetLayerIndexedReader(
                poTransfer->FindLayer( papszModuleList[iModule] ) );

        if( poAttrReader == NULL )
        {
            printf( "Unable to open attribute module %s, skipping.\n" ,
                    papszModuleList[iModule] );
            continue;
        }

        poAttrReader->Rewind();
        
/* -------------------------------------------------------------------- */
/*      Read the first record so we can clone schema information off    */
/*      of it.                                                          */
/* -------------------------------------------------------------------- */
        SDTSAttrRecord  *poAttrFeature;

        poAttrFeature = (SDTSAttrRecord *) poAttrReader->GetNextFeature();
        if( poAttrFeature == NULL )
        {
            fprintf( stderr,
                     "Didn't find any meaningful attribute records in %s.\n",
                     papszModuleList[iModule] );
        
            continue;
        }

/* -------------------------------------------------------------------- */
/*      Clone schema off the first record.  Eventually we need to       */
/*      get the information out of the DDR record, but it isn't         */
/*      clear to me how to accomplish that with the SDTS++ API.         */
/*                                                                      */
/*      The following approach may fail (dramatically) if some          */
/*      records do not include all subfields.  Furthermore, no          */
/*      effort is made to make DBF field names unique.  The SDTS        */
/*      attributes often have names much beyond the 14 character dbf    */
/*      limit which may result in non-unique attributes.                */
/* -------------------------------------------------------------------- */
        DDFFieldDefn    *poFDefn = poAttrFeature->poATTR->GetFieldDefn();
        int             iSF;
        DDFField        *poSR = poAttrFeature->poATTR;
    
        for( iSF=0; iSF < poFDefn->GetSubfieldCount(); iSF++ )
        {
            DDFSubfieldDefn     *poSFDefn = poFDefn->GetSubfield( iSF );
            int         nWidth = poSFDefn->GetWidth();
            
            switch( poSFDefn->GetType() )
            {
              case DDFString:
                if( nWidth == 0 )
                {
                    int         nMaxBytes;
                
                    const char * pachData = poSR->GetSubfieldData(poSFDefn,
                                                                  &nMaxBytes);

                    nWidth = strlen(poSFDefn->ExtractStringData(pachData,
                                                                nMaxBytes, NULL ));
                }
            
                DBFAddField( hDBF, poSFDefn->GetName(), FTString, nWidth, 0 );
                break;

              case DDFInt:
                if( nWidth == 0 )
                    nWidth = 9;

                DBFAddField( hDBF, poSFDefn->GetName(), FTInteger, nWidth, 0 );
                break;

              case DDFFloat:
                DBFAddField( hDBF, poSFDefn->GetName(), FTDouble, 18, 6 );
                break;

              default:
                fprintf( stderr,
                         "Dropping attribute `%s' of module `%s'.  "
                         "Type unsupported\n",
                         poSFDefn->GetName(),
                         papszModuleList[iModule] );
                break;
            }
        }
//.........这里部分代码省略.........

OGRSDTSLayer::OGRSDTSLayer( SDTSTransfer * poTransferIn, int iLayerIn,
                            OGRSDTSDataSource * poDSIn ) :
    bPolygonsBuilt(FALSE)
{
    poDS = poDSIn;

    poTransfer = poTransferIn;
    iLayer = iLayerIn;

    poReader = poTransfer->GetLayerIndexedReader( iLayer );

/* -------------------------------------------------------------------- */
/*      Define the feature.                                             */
/* -------------------------------------------------------------------- */
    int         iCATDEntry = poTransfer->GetLayerCATDEntry( iLayer );

    poFeatureDefn =
        new OGRFeatureDefn(poTransfer->GetCATD()->GetEntryModule(iCATDEntry));
    SetDescription( poFeatureDefn->GetName() );
    poFeatureDefn->Reference();
    poFeatureDefn->GetGeomFieldDefn(0)->SetSpatialRef(poDS->GetSpatialRef());

    OGRFieldDefn oRecId( "RCID", OFTInteger );
    poFeatureDefn->AddFieldDefn( &oRecId );

    if( poTransfer->GetLayerType(iLayer) == SLTPoint )
    {
        poFeatureDefn->SetGeomType( wkbPoint );
    }
    else if( poTransfer->GetLayerType(iLayer) == SLTLine )
    {
        poFeatureDefn->SetGeomType( wkbLineString );

        oRecId.SetName( "SNID" );
        poFeatureDefn->AddFieldDefn( &oRecId );

        oRecId.SetName( "ENID" );
        poFeatureDefn->AddFieldDefn( &oRecId );
    }
    else if( poTransfer->GetLayerType(iLayer) == SLTPoly )
    {
        poFeatureDefn->SetGeomType( wkbPolygon );
    }
    else if( poTransfer->GetLayerType(iLayer) == SLTAttr )
    {
        poFeatureDefn->SetGeomType( wkbNone );
    }

/* -------------------------------------------------------------------- */
/*      Add schema from referenced attribute records.                   */
/* -------------------------------------------------------------------- */
    char        **papszATIDRefs = NULL;

    if( poTransfer->GetLayerType(iLayer) != SLTAttr )
        papszATIDRefs = poReader->ScanModuleReferences();
    else
        papszATIDRefs = CSLAddString( papszATIDRefs,
                                      poTransfer->GetCATD()->GetEntryModule(iCATDEntry) );

    for( int iTable = 0;
         papszATIDRefs != NULL && papszATIDRefs[iTable] != NULL;
         iTable++ )
    {
        SDTSAttrReader  *poAttrReader;
        DDFFieldDefn    *poFDefn;

/* -------------------------------------------------------------------- */
/*      Get the attribute table reader, and the associated user         */
/*      attribute field.                                                */
/* -------------------------------------------------------------------- */
        int nLayerIdx = poTransfer->FindLayer( papszATIDRefs[iTable] );
        if( nLayerIdx < 0 )
            continue;
        poAttrReader = (SDTSAttrReader *)
            poTransfer->GetLayerIndexedReader(nLayerIdx);

        if( poAttrReader == NULL )
            continue;

        poFDefn = poAttrReader->GetModule()->FindFieldDefn( "ATTP" );
        if( poFDefn == NULL )
            poFDefn = poAttrReader->GetModule()->FindFieldDefn( "ATTS" );
        if( poFDefn == NULL )
            continue;

/* -------------------------------------------------------------------- */
/*      Process each user subfield on the attribute table into an       */
/*      OGR field definition.                                           */
/* -------------------------------------------------------------------- */
        for( int iSF=0; iSF < poFDefn->GetSubfieldCount(); iSF++ )
        {
            DDFSubfieldDefn     *poSFDefn = poFDefn->GetSubfield( iSF );
            int                 nWidth = poSFDefn->GetWidth();
            char                *pszFieldName;

            if( poFeatureDefn->GetFieldIndex( poSFDefn->GetName() ) != -1 )
                pszFieldName = CPLStrdup( CPLSPrintf( "%s_%s",
                                                      papszATIDRefs[iTable],
                                                      poSFDefn->GetName() ) );
            else
//.........这里部分代码省略.........

static void
AssignAttrRecordToFeature( OGRFeature * poFeature,
                           CPL_UNUSED SDTSTransfer * poTransfer,
                           DDFField * poSR )
{
/* -------------------------------------------------------------------- */
/*      Process each subfield in the record.                            */
/* -------------------------------------------------------------------- */
    DDFFieldDefn        *poFDefn = poSR->GetFieldDefn();

    for( int iSF=0; iSF < poFDefn->GetSubfieldCount(); iSF++ )
    {
        DDFSubfieldDefn *poSFDefn = poFDefn->GetSubfield( iSF );
        int                     iField;
        int                     nMaxBytes;
        const char *    pachData = poSR->GetSubfieldData(poSFDefn,
                                                         &nMaxBytes);
/* -------------------------------------------------------------------- */
/*      Indentify this field on the feature.                            */
/* -------------------------------------------------------------------- */
        iField = poFeature->GetFieldIndex( poSFDefn->GetName() );

/* -------------------------------------------------------------------- */
/*      Handle each of the types.                                       */
/* -------------------------------------------------------------------- */
        switch( poSFDefn->GetType() )
        {
          case DDFString:
            const char  *pszValue;

            pszValue = poSFDefn->ExtractStringData(pachData, nMaxBytes,
                                                   NULL);

            if( iField != -1 )
                poFeature->SetField( iField, pszValue );
            break;

          case DDFFloat:
            double      dfValue;

            dfValue = poSFDefn->ExtractFloatData(pachData, nMaxBytes,
                                                 NULL);

            if( iField != -1 )
                poFeature->SetField( iField, dfValue );
            break;

          case DDFInt:
            int         nValue;

            nValue = poSFDefn->ExtractIntData(pachData, nMaxBytes, NULL);

            if( iField != -1 )
                poFeature->SetField( iField, nValue );
            break;

          default:
            break;
        }
    } /* next subfield */
}