X-Git-Url: http://pilppa.org/gitweb/?p=libplp.git;a=blobdiff_plain;f=src%2FDataReader.cc;h=72a44bd65a20ce6cbc0bbfd2592689e288ef2388;hp=9ba287284c9526792713029aed21490e49e6f937;hb=db9ced4236847cfca52b232935838ee80dcfd047;hpb=f2938935a62db1532c95a9f3f4420a2d8325ece5

diff --git a/src/DataReader.cc b/src/DataReader.cc
index 9ba2872..72a44bd 100644
--- a/src/DataReader.cc
+++ b/src/DataReader.cc
@@ -74,7 +74,9 @@ Data *DataReader::get_latest_data() {
 
 	ret_val	= NULL;
 	y_list	= FileUtil::get_subdirectories(device_dir);
-	ret_val	= find_latest_data(y_list);
+	if (y_list.size() > 0) {
+		ret_val	= find_latest_data(y_list);
+	}
 	return ret_val;
 }
 
@@ -297,12 +299,17 @@ DataRange *DataReader::get_daily_summary() {
  * Get Daily summary specified by the calc_type from the latest date.
  */
 DataRange *DataReader::get_daily_summary(EnumSummaryCalculationType calc_type_param) {
-	Data	*data;
-	Date	date;
+	Data		*data;
+	Date		date;
+	DataRange	*ret_val;
 
+	ret_val	= NULL;
 	data	= get_latest_data();
-	date	= data->get_date();
-	return get_daily_summary(&date, calc_type_param);
+	if (data != NULL) {
+		date	= data->get_date();
+		ret_val	= get_daily_summary(&date, calc_type_param);
+	}
+	return ret_val;
 }
 
 DataRange *DataReader::get_daily_summary(Date *date,