Load data from list in a condor efficient way

loadListRange.h

void loadListRange(  TChain * _chain, string _listFile, int _jobIndex, int _splitBy ){
		
		int min = _jobIndex * _splitBy;
		int max = (_jobIndex + 1) * _splitBy - 1;
		
		if ( 0 > _splitBy || 0 > _jobIndex ){
			return;
		}

		int fileIndex = 0;

		string line;
		ifstream fListFile( _listFile.c_str());
		if ( fListFile.is_open() ){

			while ( getline( fListFile, line ) ){
				
				if ( fileIndex < min || fileIndex > max ){
					// do not add
				} else {
					_chain->Add( line.c_str() );
				}
				fileIndex ++;
			}

			fListFile.close();
				
		} else {
			cout << "ERROR" << endl;
		}
	} // loadListRange