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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.
156 lines
2.8 KiB
C
156 lines
2.8 KiB
C
/*
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* Copyright 2018 University Corporation for Atmospheric
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* Research/Unidata. See COPYRIGHT file for more info.
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*
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* This header file is for the parallel I/O functions of netCDF.
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*
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*/
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/* "$Id: netcdf_par.h,v 1.1 2010/06/01 15:46:49 ed Exp $" */
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#ifndef NCCONFIGURE_H
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#define NCCONFIGURE_H 1
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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/*
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This is included in bottom
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of config.h. It is where,
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typically, alternatives to
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missing functions should be
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defined and missing types defined.
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*/
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#ifdef _WIN32
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#ifndef HAVE_SSIZE_T
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#include <basetsd.h>
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typedef SSIZE_T ssize_t;
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#define HAVE_SSIZE_T 1
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#endif
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#endif
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/*Warning: Cygwin with -ansi does not define these functions
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in its headers.*/
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#ifndef _WIN32
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#if __STDC__ == 1 /*supposed to be same as -ansi flag */
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/* WARNING: in some systems, these functions may be defined as macros, so check */
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#ifndef strdup
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extern char* strdup(const char*);
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#endif
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#ifndef strlcat
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extern size_t strlcat(char*,const char*,size_t);
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#endif
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#ifndef snprintf
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extern int snprintf(char*, size_t, const char*, ...);
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#endif
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#ifndef strcasecmp
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extern int strcasecmp(const char*, const char*);
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#endif
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#ifndef strtoll
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extern long long int strtoll(const char*, char**, int);
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#endif
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#ifndef strtoull
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extern unsigned long long int strtoull(const char*, char**, int);
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#endif
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#endif /*STDC*/
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#else /*_WIN32*/
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#ifndef HAVE_STRLCAT
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#define strlcat(d,s,n) strcat_s((d),(n),(s))
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#endif
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#ifndef __MINGW32__
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#ifndef strcasecmp
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#define strcasecmp _stricmp
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#endif
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#ifndef strncasecmp
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#define strncasecmp _strnicmp
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#endif
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#ifndef snprintf
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#if _MSC_VER<1900
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#define snprintf _snprintf
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#endif
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#endif
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#ifndef fileno
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#define fileno(f) _fileno(f)
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#endif
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#endif /*__MINGW32__*/
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#endif /*_WIN32*/
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/* handle null arguments */
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#ifndef nulldup
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#ifdef HAVE_STRDUP
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#define nulldup(s) ((s)==NULL?NULL:strdup(s))
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#else
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extern char *nulldup(const char* s);
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#endif
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#endif
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#ifndef nulllen
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#define nulllen(s) ((s)==NULL?0:strlen(s))
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#endif
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#ifndef nullfree
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#define nullfree(s) {if((s)!=NULL) {free(s);} else {}}
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#endif
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#ifndef HAVE_UCHAR
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typedef unsigned char uchar;
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#endif
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#ifndef HAVE_LONGLONG
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typedef long long longlong;
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typedef unsigned long long ulonglong;
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#endif
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#ifndef HAVE_USHORT
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typedef unsigned short ushort;
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#endif
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#ifndef HAVE_UINT
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typedef unsigned int uint;
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#endif
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#ifndef HAVE_UINT64
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typedef unsigned long long uint64;
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#endif
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#ifndef HAVE_UINT64_T
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typedef unsigned long long uint64_t;
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#endif
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#ifndef _WIN32
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#ifndef HAVE_UINTPTR_T
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#if SIZEOF_VOIDP == 8
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#define uintptr_t unsigned long
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#else
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#define uintptr_t unsigned int
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#endif
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#endif
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#endif
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#ifndef HAVE_SIZE64_T
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typedef unsigned long long size64_t;
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#endif
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/* Provide a fixed size alternative to off_t or off64_t */
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typedef long long fileoffset_t;
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#ifndef NC_UNUSED
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#define NC_UNUSED(var) (void)var
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#endif
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#endif /* NCCONFIGURE_H */
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