OGRFeature * OGRBNALayer::GetFeature( long nFID )
{
OGRFeature *poFeature;
BNARecord* record;
int ok;
if (nFID < 0)
return NULL;
FastParseUntil(nFID);
if (nFID >= nFeatures)
return NULL;
VSIFSeekL( fpBNA, offsetAndLineFeaturesTable[nFID].offset, SEEK_SET );
curLine = offsetAndLineFeaturesTable[nFID].line;
record = BNA_GetNextRecord(fpBNA, &ok, &curLine, TRUE, bnaFeatureType);
poFeature = BuildFeatureFromBNARecord(record, nFID);
BNA_FreeRecord(record);
return poFeature;
}
OGRFeature * OGRBNALayer::GetFeature( GIntBig nFID )
{
if (nFID < 0 || !CPL_INT64_FITS_ON_INT32(nFID))
return NULL;
FastParseUntil( static_cast<int>( nFID ) );
if (nFID >= nFeatures)
return NULL;
int ok;
if( VSIFSeekL( fpBNA, offsetAndLineFeaturesTable[nFID].offset, SEEK_SET ) < 0 )
return NULL;
curLine = offsetAndLineFeaturesTable[nFID].line;
BNARecord* record
= BNA_GetNextRecord(fpBNA, &ok, &curLine, TRUE, bnaFeatureType);
OGRFeature *poFeature = BuildFeatureFromBNARecord(record, (int)nFID);
BNA_FreeRecord(record);
return poFeature;
}
OGRFeature *OGRBNALayer::GetNextFeature()
{
OGRFeature *poFeature;
BNARecord* record;
int offset, line;
if (failed || eof) return NULL;
while(1)
{
int ok = FALSE;
offset = (int) VSIFTellL(fpBNA);
line = curLine;
if (nNextFID < nFeatures)
{
VSIFSeekL( fpBNA, offsetAndLineFeaturesTable[nNextFID].offset, SEEK_SET );
curLine = offsetAndLineFeaturesTable[nNextFID].line;
}
record = BNA_GetNextRecord(fpBNA, &ok, &curLine, TRUE, bnaFeatureType);
if (ok == FALSE)
{
BNA_FreeRecord(record);
failed = TRUE;
return NULL;
}
if (record == NULL)
{
/* end of file */
eof = TRUE;
/* and we have finally build the whole index table */
partialIndexTable = FALSE;
return NULL;
}
if (record->featureType == bnaFeatureType)
{
if (nNextFID >= nFeatures)
{
nFeatures++;
offsetAndLineFeaturesTable =
(OffsetAndLine*)CPLRealloc(offsetAndLineFeaturesTable, nFeatures * sizeof(OffsetAndLine));
offsetAndLineFeaturesTable[nFeatures-1].offset = offset;
offsetAndLineFeaturesTable[nFeatures-1].line = line;
}
poFeature = BuildFeatureFromBNARecord(record, nNextFID++);
BNA_FreeRecord(record);
if( (m_poFilterGeom == NULL
|| FilterGeometry( poFeature->GetGeometryRef() ) )
&& (m_poAttrQuery == NULL
|| m_poAttrQuery->Evaluate( poFeature )) )
{
return poFeature;
}
delete poFeature;
}
else
{
BNA_FreeRecord(record);
}
}
}
