External links in C++ API?

Hdf-forum archives
1

Hello from Copenhagen all,

I'm from Tobias' group here at ESS data management.
Ran into a bit of an interesting problem. We want to create an external link to a different data file, as defined in the C API here:
https://support.hdfgroup.org/HDF5/doc/RM/RM_H5L.html#Link-CreateExternal
But we want to do this using the C++ API. I can find ways to create hard and soft links, as described here:
https://support.hdfgroup.org/HDF5/doc/cpplus_RM/class_h5_1_1_common_f_g.html#a5cdfe34b7504b51aa6ee2db7aa821b97
but there doesn't seem to be any implementation for creating external links in C++? What gives?

Cheers :slight_smile:
Martin

2

Hi Martin,

You are correct in that there is no C++ API to create an external link. We have not had the resources to
implement all C APIs in C++.

You can use the H5Lcreate_external C routine to create an external link. You must pass in both a link creation and a
link access property list identifier to H5Lcreate_external. Those property list identifiers can be obtained with C++
calls. For example: lcpl.getId().

-Barbara

ยทยทยท

From: Hdf-forum [mailto:hdf-forum-bounces@lists.hdfgroup.org] On Behalf Of Martin Shetty
Sent: Friday, January 13, 2017 8:50 AM
To: hdf-forum@lists.hdfgroup.org
Subject: [Hdf-forum] External links in C++ API?

Hello from Copenhagen all,

I'm from Tobias' group here at ESS data management.
Ran into a bit of an interesting problem. We want to create an external link to a different data file, as defined in the C API here:
https://support.hdfgroup.org/HDF5/doc/RM/RM_H5L.html#Link-CreateExternal
But we want to do this using the C++ API. I can find ways to create hard and soft links, as described here:
https://support.hdfgroup.org/HDF5/doc/cpplus_RM/class_h5_1_1_common_f_g.html#a5cdfe34b7504b51aa6ee2db7aa821b97
but there doesn't seem to be any implementation for creating external links in C++? What gives?

Cheers :slight_smile:
Martin