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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.
54 lines
1.8 KiB
Bash
Executable File
54 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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# For a netCDF-3 build, test nccopy on netCDF files in this
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# directory. This test depends on a bunch of other ncdump tests
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# running first, to produce the data files that are used to test
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# nccopy.
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# Dennis Heimbigner
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if test "x$srcdir" = x ; then srcdir=`pwd`; fi
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. ../test_common.sh
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set -e
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echo ""
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# get some config.h parameters
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if test -f ${top_builddir}/config.h ; then
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if fgrep -e '#define ENABLE_CDF5 1' ${top_builddir}/config.h >/dev/null ; then
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HAVE_CDF5=1
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else
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HAVE_CDF5=0
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fi
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else
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echo "Cannot locate config.h"
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exit 1
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fi
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TESTFILES='tst_output_c0 tst_output_c0tmp ctest0 ctest0_64 test0_offset test1_offset
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tst_calendars tst_mslp tst_mslp_64 tst_ncml tst_small tst_utf8'
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if test "x$HAVE_CDF5" = x1 ; then
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TESTFILES="$TESTFILES small small2"
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fi
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echo "*** Testing netCDF-3 features of nccopy on ncdump/*.nc files"
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for i in $TESTFILES ; do
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echo "*** Testing nccopy $i.nc nccopy3_copy_of_$i.nc ..."
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${NCCOPY} $i.nc nccopy3_copy_of_$i.nc
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${NCDUMP} -n nccopy3_copy_of_$i $i.nc > tmp_tst_nccopy3.cdl
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${NCDUMP} nccopy3_copy_of_$i.nc > nccopy3_copy_of_$i.cdl
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diff nccopy3_copy_of_$i.cdl tmp_tst_nccopy3.cdl
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rm nccopy3_copy_of_$i.nc nccopy3_copy_of_$i.cdl tmp_tst_nccopy3.cdl
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done
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echo "*** Testing nccopy -u"
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${NCGEN} -b $srcdir/tst_brecs.cdl
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# convert record dimension to fixed-size dimension
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$NCCOPY -u tst_brecs.nc nccopy3_copy_of_tst_brecs.nc
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${NCDUMP} -n nccopy3_copy_of_tst_brecs tst_brecs.nc | sed '/ = UNLIMITED ;/s/\(.*\) = UNLIMITED ; \/\/ (\(.*\) currently)/\1 = \2 ;/' > tmp_tst_nccopy3.cdl
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${NCDUMP} nccopy3_copy_of_tst_brecs.nc > nccopy3_copy_of_tst_brecs.cdl
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diff -b nccopy3_copy_of_tst_brecs.cdl tmp_tst_nccopy3.cdl
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rm nccopy3_copy_of_tst_brecs.cdl tmp_tst_nccopy3.cdl tst_brecs.nc nccopy3_copy_of_tst_brecs.nc
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echo "*** All nccopy tests passed!"
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exit 0
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