fprintf(file, "length=\"%g\" ", edge->length);
if ((edge_data_print) && ((name = edge_data_print(edge->data))))
fprintf(file, "data=\"%s\" ", name);
fprintf(file, "length=\"%g\" ", edge->length);
if ((edge_data_print) && ((name = edge_data_print(edge->data))))
fprintf(file, "data=\"%s\" ", name);