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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.
39 lines
1.4 KiB
Makefile
39 lines
1.4 KiB
Makefile
## This is a automake file, part of Unidata's netCDF package.
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# Copyright 2018, see the COPYRIGHT file for more information.
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# This automake file generates the Makefile to build the include
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# directory.
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# Ed Hartnett, Dennis Heimbigner, Ward Fisher
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include_HEADERS = netcdf.h netcdf_meta.h netcdf_mem.h netcdf_aux.h \
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netcdf_filter.h netcdf_filter_build.h netcdf_filter_hdf5_build.h netcdf_dispatch.h netcdf_json.h
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if BUILD_PARALLEL
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include_HEADERS += netcdf_par.h
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endif
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noinst_HEADERS = nc_logging.h nc_tests.h fbits.h nc.h nclist.h \
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ncuri.h ncutf8.h ncdispatch.h ncdimscale.h netcdf_f.h err_macros.h \
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ncbytes.h nchashmap.h ceconstraints.h rnd.h nclog.h ncconfigure.h \
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nc4internal.h nctime.h nc3internal.h onstack.h ncrc.h ncauth.h \
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ncoffsets.h nctestserver.h nc4dispatch.h nc3dispatch.h ncexternl.h \
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ncpathmgr.h ncindex.h hdf4dispatch.h hdf5internal.h nc_provenance.h \
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hdf5dispatch.h ncmodel.h isnan.h nccrc.h ncexhash.h ncxcache.h \
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ncjson.h ncxml.h ncs3sdk.h
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if USE_DAP
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noinst_HEADERS += ncdap.h
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endif
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if ENABLE_BYTERANGE
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noinst_HEADERS += nchttp.h
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endif
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EXTRA_DIST = CMakeLists.txt XGetopt.h netcdf_meta.h.in netcdf_dispatch.h.in
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# Give the recipe for rebuilding netcdf_json.h
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makencjson::
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sed -e 's/NCJSON_H/NETCDF_JSON_H/' -e '/ncjson.h/d' <${srcdir}/ncjson.h > netcdf_json.h
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sed -e '/ncjson.h/d' < ${srcdir}/../libdispatch/ncjson.c >> netcdf_json.h
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