Extend existing dataset

[jokteur]

Hello,

I want to extend an existing dataset in an already existing hdf5 file. I tried following the example of create_extensible_dataset.cpp, however I encounter the following error:

#000: src/H5Dio.c line 303 in H5Dwrite(): could not get a validated dataspace from file_space_id
    major: Invalid arguments to routine
    minor: Bad value
  #001: src/H5S.c line 242 in H5S_get_validated_dataspace(): selection + offset not within extent
    major: Dataspace
    minor: Out of range

which seems the same error that this user encountered (on hdf5 forum). The solution is to file_space = H5Dget_space(dset) again after resizing, and use it in the HDF5write:

H5Dwrite(dset, H5T_NATIVE_DOUBLE, mem_space, H5P_DEFAULT, hfield.getmemory());

Is there anyway to do this with HighFive without using the low level HDF5 library ?

Here is the idea of the code that I use

// somewhere before, I created a new dataset
HighFive::DataSpace dataspace({my_size}, {HighFive::DataSpace::UNLIMITED})
DataSet dataset = file.createDataSet(dataset_name, dataspace, create_datatype<double>(), props);
dataset.write(my_array);

// Now this part is executed later on, when the file has been closed before and reopened
DataSet dataset = file.getDataSet(dataset_name);
previous_size = dataset.getSpace().getDimensions()[0];
dataset.resize({ previous_size + my_new_array_size });
dataset.select({ previous_size }, { previous_size + my_new_array_size }).write(my_new_array, xfer_props);

[jokteur]

I really should have re-read my code.
I should be doing

dataset.select({ previous_size }, { previous_size + my_new_array_size }).write(my_new_array, xfer_props);

instead of

dataset.select({ previous_size }, { previous_size + my_new_array_size }).write(my_new_array, xfer_props);