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3ffe7be446
re: Discussion https://github.com/Unidata/netcdf-c/discussions/2214 The primary change is to support so-called "standard filters". A standard filter is one that is defined by the following netcdf-c API: ```` int nc_def_var_XXX(int ncid, int varid, size_t nparams, unsigned* params); int nc_inq_var_XXXX(int ncid, int varid, int* usefilterp, unsigned* params); ```` So for example, zstandard would be a standard filter by defining the functions *nc_def_var_zstandard* and *nc_inq_var_zstandard*. In order to define these functions, we need a new dispatch function: ```` int nc_inq_filter_avail(int ncid, unsigned filterid); ```` This function, combined with the existing filter API can be used to implement arbitrary standard filters using a simple code pattern. Note that I would have preferred that this function return a list of all available filters, but HDF5 does not support that functionality. So this PR implements the dispatch function and implements the following standard functions: + bzip2 + zstandard + blosc Specific test cases are also provided for HDF5 and NCZarr. Over time, other specific standard filters will be defined. ## Primary Changes * Add nc_inq_filter_avail() to netcdf-c API. * Add standard filter implementations to test use of *nc_inq_filter_avail*. * Bump the dispatch table version number and add to all the relevant dispatch tables (libsrc, libsrcp, etc). * Create a program to invoke nc_inq_filter_avail so that it is accessible to shell scripts. * Cleanup szip support to properly support szip when HDF5 is disabled. This involves detecting libsz separately from testing if HDF5 supports szip. * Integrate shuffle and fletcher32 into the existing filter API. This means that, for example, nc_def_var_fletcher32 is now a wrapper around nc_def_var_filter. * Extend the Codec defaulting to allow multiple default shared libraries. ## Misc. Changes * Modify configure.ac/CMakeLists.txt to look for the relevant libraries implementing standard filters. * Modify libnetcdf.settings to list available standard filters (including deflate and szip). * Add CMake test modules to locate libbz2 and libzstd. * Cleanup the HDF5 memory manager function use in the plugins. * remove unused file include//ncfilter.h * remove tests for the HDF5 memory operations e.g. H5allocate_memory. * Add flag to ncdump to force use of _Filter instead of _Deflate or _Shuffle or _Fletcher32. Used for testing. |
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| .. | ||
| bm_chunking.c | ||
| bm_radar.c | ||
| bzip2.cdl | ||
| cdm_sea_soundings.c | ||
| clear_cache.sh | ||
| CMakeLists.txt | ||
| findplugin.in | ||
| h5testszip.c | ||
| Makefile.am | ||
| noop.cdl | ||
| ref_any.cdl | ||
| ref_bzip2.c | ||
| ref_fillonly.cdl | ||
| ref_filter_order_create.txt | ||
| ref_filter_order_read.txt | ||
| ref_filter_repeat.txt | ||
| ref_filtered.cdl | ||
| ref_filteredvv.cdl | ||
| ref_filterx_hdf5.txt | ||
| ref_hdf5_compat1.nc | ||
| ref_hdf5_compat2.nc | ||
| ref_hdf5_compat3.nc | ||
| ref_multi.cdl | ||
| ref_nccopyF.cdl | ||
| ref_ncgenF.cdl | ||
| ref_szip.cdl | ||
| ref_szip.h5 | ||
| ref_tst_compounds.nc | ||
| ref_tst_dims.nc | ||
| ref_tst_interops4.nc | ||
| ref_tst_xplatform2_1.nc | ||
| ref_tst_xplatform2_2.nc | ||
| ref_unfiltered.cdl | ||
| ref_unfilteredvv.cdl | ||
| renamegroup.c | ||
| run_empty_vlen_test.sh | ||
| run_grp_rename.sh | ||
| run_par_test.sh.in | ||
| t_type.c | ||
| tdset.h5 | ||
| test_fillonly.sh | ||
| test_filter_misc.c | ||
| test_filter_order.c | ||
| test_filter_reg.c | ||
| test_filter_repeat.c | ||
| test_filter_vlen.c | ||
| test_filter.c | ||
| test_filterx_hdf5.c | ||
| test_szip.c | ||
| test_wrapper.in | ||
| tst_alignment.c | ||
| tst_atts1.c | ||
| tst_atts2.c | ||
| tst_atts3.c | ||
| tst_atts_string_rewrite.c | ||
| tst_atts.c | ||
| tst_bug324.c | ||
| tst_bug1442.c | ||
| tst_camrun.c | ||
| tst_charvlenbug.c | ||
| tst_chunks2.c | ||
| tst_chunks.c | ||
| tst_compounds2.c | ||
| tst_compounds3.c | ||
| tst_compounds.c | ||
| tst_converts2.c | ||
| tst_converts.c | ||
| tst_coords2.c | ||
| tst_coords3.c | ||
| tst_coords.c | ||
| tst_dims2.c | ||
| tst_dims3.c | ||
| tst_dims.c | ||
| tst_elatefill.c | ||
| tst_empty_vlen_unlim.c | ||
| tst_endian_fill.c | ||
| tst_enums.c | ||
| tst_files4.c | ||
| tst_files5.c | ||
| tst_files6.c | ||
| tst_files.c | ||
| tst_fill_attr_vanish.c | ||
| tst_fillbug.c | ||
| tst_fillonly.c | ||
| tst_fills2.c | ||
| tst_fills.c | ||
| tst_filter_avail.c | ||
| tst_filter.sh | ||
| tst_filterparser.c | ||
| tst_grps2.c | ||
| tst_grps.c | ||
| tst_h5_endians.c | ||
| tst_h_converts.c | ||
| tst_h_refs.c | ||
| tst_h_scalar.c | ||
| tst_h_strbug.c | ||
| tst_h_strings3.c | ||
| tst_h_vl2.c | ||
| tst_hdf5_file_compat.c | ||
| tst_interops4.c | ||
| tst_interops5.c | ||
| tst_interops6.c | ||
| tst_interops_dims.c | ||
| tst_interops.c | ||
| tst_large2.c | ||
| tst_large3.c | ||
| tst_large5.c | ||
| tst_large.c | ||
| tst_misc.sh | ||
| tst_mode.c | ||
| tst_mpi_parallel.c | ||
| tst_multifilter.c | ||
| tst_nc4perf.c | ||
| tst_nc_converts.c | ||
| tst_opaques.c | ||
| tst_parallel3.c | ||
| tst_parallel4.c | ||
| tst_parallel5.c | ||
| tst_parallel_compress.c | ||
| tst_parallel_zlib.c | ||
| tst_parallel.c | ||
| tst_put_vars_two_unlim_dim.c | ||
| tst_put_vars.c | ||
| tst_quantize_par.c | ||
| tst_quantize.c | ||
| tst_rehash.c | ||
| tst_rename2.c | ||
| tst_rename3.c | ||
| tst_rename.c | ||
| tst_simplerw_coll_r.c | ||
| tst_specific_filters.sh | ||
| tst_strings2.c | ||
| tst_strings.c | ||
| tst_sync.c | ||
| tst_szip.sh | ||
| tst_types.c | ||
| tst_udf.c | ||
| tst_unlim_vars.c | ||
| tst_utf8.c | ||
| tst_v2.c | ||
| tst_varms.c | ||
| tst_vars2.c | ||
| tst_vars3.c | ||
| tst_vars4.c | ||
| tst_vars.c | ||
| tst_varsperf.c | ||
| tst_virtual_datasets.c | ||
| tst_vl.c | ||
| tst_vlenstr.c | ||
| tst_xplatform2.c | ||
| tst_xplatform.c | ||