Giuseppe, Thanks for bringing this to our attention. This is definitely something we should consider adding before the HDF5 VOL is included in a release. For now, you need to either do the calculations on your own or add the public API function to the HDF5 library. Sorry for the delay in responding.
-Neil ________________________________________ From: Hdf-forum <[email protected]> on behalf of Giuseppe Congiu <[email protected]> Sent: Monday, October 10, 2016 9:15:23 AM To: [email protected] Subject: [Hdf-forum] obtaining offset length pairs from dataspace id Hello, I am writing an external HDF5 VOL plugin. I have implemented the base mappings between main data model objects (container, groups and datasets) and corresponding storage representations. At this point I have to implement the dataset read/write functions and thus I need to reconstruct the offset length pairs starting from the dataspace id describing the data layout inside the file. Apparently I cannot use the H5S_select_get_seq_list() function since this is only available to internal plugins while I am writing an external plugin. In the public API there are a couple of functions to extract this type of information from the dataspace, e.g. H5Sget_select_hyper_blocklist(), but they do not return directly the offset and length pairs like the internal function previously mentioned does. Unfortunately my experience with HDF5 dataspaces is not that deep and I am wondering what is the best way of extracting the information I need from the dataspace id. Thanks, -- Giuseppe Congiu · Research Engineer II Seagate Technology, LLC office: +44 (0)23 9249 6082 · mobile: www.seagate.com<http://www.seagate.com> _______________________________________________ Hdf-forum is for HDF software users discussion. [email protected] http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
