IV.2.10 Raw reading of Nastran HDF file’s content

Example “RUBY/EX26/hdf_dataset_iteration.rb” illustrates the raw reading of Nastran HDF file content. First, the library must be loaded:

    Post.loadHdf5Library("C:/NewProgs/HDF5/HDF5-1.8.20-win32/bin/hdf5.dll")

Then, HDF5 file is attached and different methods are called to obtain information on the content of the file. In particular, the different Datasets contained in the file are identified, and their characteristics (Compound members, and number of items).

   db.attachHdf(h5Path)
   dsets=db.getHdfAttachmentDataSets(h5Path)
   dsets.each do |dsPath|
       members=db.getHdfAttachmentCompoundMemberNames(h5Path,dsPath)
       nbrLines=db.getHdfAttachmentDataSetNbrItems(h5Path,dsPath)
       printf("%s (%d*%d)\n",dsPath,nbrLines,members.size)
       members.each do |str|
           printf("%20s\n",str)
       end
   end

In the end, iteration on content uses instructions as

   db.each_hdfAttachmentNasSetItem(h5Path,dsets[2],iMin,iMax) do |x|
       puts x
       $stdout.printf("\n\n")
   end

The raw reading of Dataset content in an Array is shown in example “TESTSAT/RUBY/EX26/hdf_dataset_array.rb”.