safeguard: do not read/write 0 bytes (iostream)

2014-06-05 23:14:36 +06:00
parent a32116d24c
commit b6787b0014
6 changed files with 61 additions and 18 deletions
@@ -308,7 +308,10 @@ unsigned readHSGRFromStream(const boost::filesystem::path &hsgr_file,
    hsgr_input_stream.read((char *)&(node_list[0]), number_of_nodes * sizeof(NodeT));

    edge_list.resize(number_of_edges);
-    hsgr_input_stream.read((char *)&(edge_list[0]), number_of_edges * sizeof(EdgeT));
+    if (number_of_edges > 0)
+    {
+        hsgr_input_stream.read((char *)&(edge_list[0]), number_of_edges * sizeof(EdgeT));
+    }
    hsgr_input_stream.close();

    return number_of_nodes;