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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.
86 lines
1.4 KiB
Makefile
86 lines
1.4 KiB
Makefile
# This is part of Unidata's netCDF package. Copyright 2018, see the
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# COPYRIGHT file for more information.
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# Build the ZARR dispatch layer.
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# Dennis Heimbigner
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# Get AM_CPPFLAGS and AM_LDFLAGS
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include $(top_srcdir)/lib_flags.am
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AM_CPPFLAGS += -D_LARGEFILE_SOURCE
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AM_CPPFLAGS += -I$(top_srcdir)/libsrc4 -I$(top_srcdir)/libncpoco
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libnczarr_la_CPPFLAGS = ${AM_CPPFLAGS}
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AM_CXXFLAGS =
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libnczarr_la_LIBADD =
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libnczarr_la_LDFLAGS =
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# Remember ENABLE_NCZARR implies USE_NETCDF4
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# We may have to add to these later.
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DISTCLEANFILES =
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MAINTAINERCLEANFILES =
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CLEANFILES =
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EXTRA_DIST =
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LDADD=
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# This is our output. The ZARR convenience library.
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noinst_LTLIBRARIES = libnczarr.la
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# The source files.
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libnczarr_la_SOURCES = \
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zarr.c \
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zattr.c \
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zxcache.c \
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zchunking.c \
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zclose.c \
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zcreate.c \
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zcvt.c \
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zdim.c \
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zdispatch.c \
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zfile.c \
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zgrp.c \
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zinternal.c \
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zmap.c \
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zmap_file.c \
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zodom.c \
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zopen.c \
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zprov.c \
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zsync.c \
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ztype.c \
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zutil.c \
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zvar.c \
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zwalk.c \
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zdebug.c \
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zarr.h \
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zcache.h \
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zchunking.h \
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zdispatch.h \
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zincludes.h \
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zinternal.h \
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zmap.h \
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zodom.h \
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zprovenance.h \
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zfilter.h \
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zdebug.h
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if ENABLE_NCZARR_ZIP
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libnczarr_la_SOURCES += zmap_zip.c
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endif
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if ENABLE_NCZARR_FILTERS
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libnczarr_la_SOURCES += zfilter.c
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endif
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if ENABLE_S3_SDK
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libnczarr_la_SOURCES += zmap_s3sdk.c
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libnczarr_la_SOURCES +=
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AM_CXXFLAGS += -std=c++11
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endif
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# For now, ignore these
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IGNORED=ztype.c
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# Package this for cmake build.
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EXTRA_DIST += CMakeLists.txt
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