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cloud using a variant of the Zarr protocol and storage format. This enhancement is generically referred to as "NCZarr". The data model supported by NCZarr is netcdf-4 minus the user-defined types and the String type. In this sense it is similar to the CDF-5 data model. More detailed information about enabling and using NCZarr is described in the document NUG/nczarr.md and in a [Unidata Developer's blog entry](https://www.unidata.ucar.edu/blogs/developer/en/entry/overview-of-zarr-support-in). WARNING: this code has had limited testing, so do use this version for production work. Also, performance improvements are ongoing. Note especially the following platform matrix of successful tests: Platform | Build System | S3 support ------------------------------------ Linux+gcc | Automake | yes Linux+gcc | CMake | yes Visual Studio | CMake | no Additionally, and as a consequence of the addition of NCZarr, major changes have been made to the Filter API. NOTE: NCZarr does not yet support filters, but these changes are enablers for that support in the future. Note that it is possible (probable?) that there will be some accidental reversions if the changes here did not correctly mimic the existing filter testing. In any case, previously filter ids and parameters were of type unsigned int. In order to support the more general zarr filter model, this was all converted to char*. The old HDF5-specific, unsigned int operations are still supported but they are wrappers around the new, char* based nc_filterx_XXX functions. This entailed at least the following changes: 1. Added the files libdispatch/dfilterx.c and include/ncfilter.h 2. Some filterx utilities have been moved to libdispatch/daux.c 3. A new entry, "filter_actions" was added to the NCDispatch table and the version bumped. 4. An overly complex set of structs was created to support funnelling all of the filterx operations thru a single dispatch "filter_actions" entry. 5. Move common code to from libhdf5 to libsrc4 so that it is accessible to nczarr. Changes directly related to Zarr: 1. Modified CMakeList.txt and configure.ac to support both C and C++ -- this is in support of S3 support via the awd-sdk libraries. 2. Define a size64_t type to support nczarr. 3. More reworking of libdispatch/dinfermodel.c to support zarr and to regularize the structure of the fragments section of a URL. Changes not directly related to Zarr: 1. Make client-side filter registration be conditional, with default off. 2. Hack include/nc4internal.h to make some flags added by Ed be unique: e.g. NC_CREAT, NC_INDEF, etc. 3. cleanup include/nchttp.h and libdispatch/dhttp.c. 4. Misc. changes to support compiling under Visual Studio including: * Better testing under windows for dirent.h and opendir and closedir. 5. Misc. changes to the oc2 code to support various libcurl CURLOPT flags and to centralize error reporting. 6. By default, suppress the vlen tests that have unfixed memory leaks; add option to enable them. 7. Make part of the nc_test/test_byterange.sh test be contingent on remotetest.unidata.ucar.edu being accessible. Changes Left TO-DO: 1. fix provenance code, it is too HDF5 specific.
72 lines
2.7 KiB
C
72 lines
2.7 KiB
C
#ifndef NCGEN_UTIL_H
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#define NCGEN_UTIL_H
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/*********************************************************************
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* Copyright 2018, UCAR/Unidata
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* See netcdf/COPYRIGHT file for copying and redistribution conditions.
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* $Header: /upc/share/CVS/netcdf-3/ncgen/util.h,v 1.3 2010/04/04 19:39:57 dmh Exp $
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*********************************************************************/
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#define MAX(x,y) ((x)>(y)?(x):(y))
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extern void expe2d(char*);
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extern int pow2(int);
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extern void tztrim(char*);
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extern unsigned int chartohex(char c);
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extern void reclaimvardata(List*);
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extern void reclaimattptrs(void*, long);
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extern void cleanup(void);
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extern char* fullname(Symbol*);
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extern int isunlimited0(Dimset*);
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extern int hasunlimited(Dimset* dimset);
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extern int classicunlimited(Dimset* dimset);
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extern int isbounded(Dimset* dimset);
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extern char* nctypename(nc_type);
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extern char* ncclassname(nc_class);
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extern int ncsize(nc_type);
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extern nc_type signedtype(nc_type nctype);
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extern nc_type unsignedtype(nc_type nctype);
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/* We have several versions of primitive testing*/
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extern int isinttype(nc_type nctype); /* some kind of integer*/
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extern int isuinttype(nc_type nctype); /* some kind of integer*/
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extern int isfloattype(nc_type nctype); /* some kind of float*/
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extern int isclassicprim(nc_type); /* a classic primitive type*/
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extern int isclassicprimplus(nc_type); /* classic + String*/
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extern int isprim(nc_type); /* a netcdf4 primitive type*/
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extern int isprimplus(nc_type); /* a netcdf4 primitive type + OPAQUE + ENUM*/
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extern void collectpath(Symbol* grp, List* grpstack);
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extern List* prefixdup(List*);
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extern int prefixeq(List*,List*);
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#define prefixlen(sequence) (listlength(sequence))
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extern char* poolalloc(size_t);
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extern char* pooldup(const char*);
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extern char* poolcat(const char* s1, const char* s2);
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/* compute the total n-dimensional size as 1 long array;
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if stop == 0, then stop = dimset->ndims.
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*/
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extern size_t crossproduct(Dimset* dimset, int start, int stop);
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extern int findunlimited(Dimset* dimset, int start);
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extern int findlastunlimited(Dimset* dimset);
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extern int countunlimited(Dimset* dimset);
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extern unsigned char* makebytestring(char* s, size_t* lenp);
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extern int getpadding(int offset, int alignment);
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extern void check_err(const int stat, const int line, const char* file, const char* func);
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extern void check_err2(const int stat, const int cdlline, const int line, const char* file, const char* func);
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extern const char* kind_string(int kind);
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extern int getrootid(int grpid);
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/* Inline functions */
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#define isunlimited(dimset,i) ((dimset)->dimsyms[i]->dim.isunlimited)
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#define declsizefor(dimset,i) ((dimset)->dimsyms[i]->dim.declsize)
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#define rankfor(dimset) ((dimset)->ndims)
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#endif /*NCGEN_UTIL_H*/
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