OGRFeature *OGRAVCBinLayer::GetFeature( GIntBig nFID )
{
if( !CPL_INT64_FITS_ON_INT32(nFID) )
return NULL;
/* -------------------------------------------------------------------- */
/* If we haven't started yet, open the file now. */
/* -------------------------------------------------------------------- */
if( hFile == NULL )
{
AVCE00ReadPtr psInfo = ((OGRAVCBinDataSource *) poDS)->GetInfo();
hFile = AVCBinReadOpen(psInfo->pszCoverPath,
psSection->pszFilename,
psInfo->eCoverType,
psSection->eType,
psInfo->psDBCSInfo);
}
/* -------------------------------------------------------------------- */
/* Read the raw feature - the -3 fid is a special flag */
/* indicating serial access. */
/* -------------------------------------------------------------------- */
void *pFeature;
if( nFID == -3 )
{
while( (pFeature = AVCBinReadNextObject( hFile )) != NULL
&& !MatchesSpatialFilter( pFeature ) )
{
nNextFID++;
}
}
else
{
bNeedReset = TRUE;
pFeature = AVCBinReadObject( hFile, (int)nFID );
}
if( pFeature == NULL )
return NULL;
/* -------------------------------------------------------------------- */
/* Translate the feature. */
/* -------------------------------------------------------------------- */
OGRFeature *poFeature;
poFeature = TranslateFeature( pFeature );
if( poFeature == NULL )
return NULL;
/* -------------------------------------------------------------------- */
/* LAB's we have to assign the FID to directly, since it */
/* doesn't seem to be stored in the file structure. */
/* -------------------------------------------------------------------- */
if( psSection->eType == AVCFileLAB )
{
if( nFID == -3 )
poFeature->SetFID( nNextFID++ );
else
poFeature->SetFID( nFID );
}
/* -------------------------------------------------------------------- */
/* If this is a polygon layer, try to assemble the arcs to form */
/* the whole polygon geometry. */
/* -------------------------------------------------------------------- */
if( psSection->eType == AVCFilePAL
|| psSection->eType == AVCFileRPL )
FormPolygonGeometry( poFeature, (AVCPal *) pFeature );
/* -------------------------------------------------------------------- */
/* If we have an attribute table, append the attributes now. */
/* -------------------------------------------------------------------- */
AppendTableFields( poFeature );
return poFeature;
}
OGRFeature *OGRAVCE00Layer::GetFeature( GIntBig nFID )
{
/* -------------------------------------------------------------------- */
/* If we haven't started yet, open the file now. */
/* -------------------------------------------------------------------- */
if( psRead == NULL )
{
psRead = AVCE00ReadOpenE00(psSection->pszFilename);
if (psRead == NULL)
return NULL;
/* advance to the specified line number */
if (AVCE00ReadGotoSectionE00(psRead, psSection, 0) != 0)
return NULL;
nNextFID = 1;
}
/* -------------------------------------------------------------------- */
/* Read the raw feature - the -3 fid is a special flag */
/* indicating serial access. */
/* -------------------------------------------------------------------- */
void *pFeature;
if( nFID == -3 )
{
while( (pFeature = AVCE00ReadNextObjectE00(psRead)) != NULL
&& psRead->hParseInfo->eFileType != AVCFileUnknown
&& !MatchesSpatialFilter( pFeature ) )
{
nNextFID++;
}
}
else
{
bNeedReset = TRUE;
if (nNextFID > nFID)
{
/* advance to the specified line number */
if (AVCE00ReadGotoSectionE00(psRead, psSection, 0) != 0)
return NULL;
}
do
{
pFeature = AVCE00ReadNextObjectE00(psRead);
++nNextFID;
}
while (NULL != pFeature && nNextFID <= nFID);
}
if( pFeature == NULL )
return NULL;
/* -------------------------------------------------------------------- */
/* Translate the feature. */
/* -------------------------------------------------------------------- */
OGRFeature *poFeature;
poFeature = TranslateFeature( pFeature );
if( poFeature == NULL )
return NULL;
/* -------------------------------------------------------------------- */
/* LAB's we have to assign the FID to directly, since it */
/* doesn't seem to be stored in the file structure. */
/* -------------------------------------------------------------------- */
if( psSection->eType == AVCFileLAB )
{
if( nFID == -3 )
poFeature->SetFID( nNextFID++ );
else
poFeature->SetFID( nFID );
}
/* -------------------------------------------------------------------- */
/* If this is a polygon layer, try to assemble the arcs to form */
/* the whole polygon geometry. */
/* -------------------------------------------------------------------- */
if( psSection->eType == AVCFilePAL
|| psSection->eType == AVCFileRPL )
{
FormPolygonGeometry( poFeature, (AVCPal *) pFeature );
}
/* -------------------------------------------------------------------- */
/* If we have an attribute table, append the attributes now. */
/* -------------------------------------------------------------------- */
AppendTableFields( poFeature );
return poFeature;
}
