2. Factored out the parameter string parsing for ncgen and nccopy
int libdispatch/dfilter.c + include/ncfilter.h
3. Allow a parameter string to use constant types other than
unsigned int. See docs/filters.md for details.
4. Moved the old content of include/netcdf_filter.h into include/netcdf.h
and removed include/netcdf_filter.h as no longer needed.
5. Force the test filter (bzip2) in nc_test4/filter_test to
be built using BUILT_SOURCES.
to docs/filter.md
2. Moved location of filter.md in documentation
3. Add a template file as the basis for building new filters.
4. Did some test case cleanup
1. Allow nccopy to apply filters, especially on the output file.
This provides a third way to do this other than using ncgen or
programatically
2. Make sure that even if the filter code is not available, it is
possible to see the filter id and parameters for variables using
e.g ncdump -hs.
3. Fix bug in nccopy so that the input file does
not necessarily have to be netcdf-4.
4. At last minute decided to change to using a
single "_Filter" attribute for ncgen
5. Added a test to tst_filter.sh to generate C code using ncgen.
This relies on the HDF5 capability to
dynamically load compression filters.
Note that a compression filter is just
a subcase of filters.
The primary user-visible changes are as follows:
1. Add a standard header "netcdf_filter.h" that defines
the necessary API extensions
2. Modify ncgen to support two new special attributes
"_Filter_ID" and "_Filter_Parameters" so that compression
can be turned on when creating a file using ncgen.
4. Add a detailed description of filtering support
to the user's guide; see the file filters.md
5. Add a test case directory for this: nc_test4/filter_test.
It is fragile and a ./configure flags (-enable-filter-test)
is defined (default disabled) to shut this off this test
to avoid spurious 'make check' failures.
Note that the HDF5 documentation is not up-to-date, so
much of what is encoded here comes from examining the
actual code in the file H5PL.c in the HDF5 source code.
