Commit Graph

33 Commits

Author SHA1 Message Date
Ward Fisher
31dee0c4da
Revert "Revert "Fix nczarr-experimental: improve build support, disengage hdf5 vs netcdf4 flags, and find AWS libraries"" 2020-08-17 19:15:47 -06:00
Ward Fisher
16c27ca13f
Revert "Fix nczarr-experimental: improve build support, disengage hdf5 vs netcdf4 flags, and find AWS libraries" 2020-08-17 15:51:01 -06:00
Dennis Heimbigner
d538cf38c2 Fix nczarr-experimental to better support CMake and find AWS libraries
The primary fix is to improve CMake build support.
Specific changes include:
* CMake: Provide a better soln to locating the AWS SDK
  libraries; the new way is the preferred method as described in
  the aws-cpp-sdk documentation.
* CMake (and Automake): allow -DENABLE_S3_SDK (default off) to suppress
  looking for AWS libraries.
* CMake: add the complete set of nczarr tests
* CMake: add EXTERNL as needed to various .h files.
* Improve support for windows drive letters in paths.
* Add nczarr and s3 flags to nc-config
* For VisualStudio X nczarr, cleanup the NAN+INFINITY handling
* Convert _MSC_VER -> _WIN32 and vice versa as needed
* NCZarr - support multiple platform paths including windows, cygwin.
  mingw, etc.
* NCZarr - sort the test outputs because different platforms
  produce directory contents in different orders.

One big change concerns netcdf-c/CMakeLists.txt and netcdf-c/configure.ac.
In the current versions, it was the case that --disable-hdf5
disabled netcdf-4 (libsrc4). With nczarr, this can no longer
be the case because nczarr requires libsrc4 even if libhdf5
is disabled. So, I modified the above files to move the
format options (HDF5, NCZarr, HDF4, etc) to a single place
near the front of the files. Now it is the case that:
* Enabling any of the formats that require libsrc4
  also does an implicit --enable-netcdf4.
* --disable-netcdf4 | --disable-netcdf-4 now becomes
  and alias for --disable-hdf5.

There are probably some bugs in this change in terms of
dependencies between format options.

Problems:
* CMake S3 support is still not working for Visual Studio
* A recent issue points out that there is work to do on handling
  UTF8 filenames, but that will be addressed in a separate fix.

Notes:
* Consider converting all of our includes/.h files to use EXTERNL
2020-07-12 12:21:56 -06:00
Dennis Heimbigner
59e04ae071 This PR adds EXPERIMENTAL support for accessing data in the
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.
2020-06-28 18:02:47 -06:00
Dennis Heimbigner
44d0dcaad2 Add support for multiple filters per variable.
re: https://github.com/Unidata/netcdf-c/issues/1584

Support has been added for multiple filters per variable.  This
affects a number of components in netcdf. The new APIs are
documented in NUG/filters.md.

The primary changes are:
* A set of new functions are provided (see __include/netcdf_filter.h__).
    - Obtain a list of the filters associated with a variable
    - Obtain the parameters for a specific filter.
* The existing __nc_inq_var_filter__ function now returns info
  about the first defined filter.
* The utilities (ncgen, ncdump, and nccopy) now support
  an extended format for specifying a sequence of filters.
  The general form is __<filter>|<filter>..._.
* The ncdump **_Filter** attribute now dumps a list of all the
  filters associated with a variable using the above new format.
* Filter specifications can now use a filter name instead of number
  for filters known to the netcdf library, which in turn is taken
  from the HDF5 filter registration page.
* New errors are defined: NC_EFILTER and NC_ENOFILTER. The latter
  is returned if an attempt is made to access an unknown filter.
* Internally, the dispatch table has been extended to add a function
  to handle all of the filter functions.
* New, filter-related, tests were added to nc_test4.
* A new plugin was added to the plugins directory to help with testing.

Notes:
1. The shuffle and fletcher32 filters are not part of the multifilter system.

Misc. changes:
1. A debug module was added to libhdf5 to help catch error locations.
2020-02-16 12:59:33 -07:00
Dennis Heimbigner
c9d16d82d6 Fix cmake X mmap
supercede PR: https://github.com/Unidata/netcdf-c/pull/1384

Since we have an mmap user, undeprecate it and make sure
it works. Other changes:

* fix test cases to work with make -j
* fix exposed ncgen error.
2019-04-19 20:32:26 -06:00
Ward Fisher
7fd7696940 ncgen directory updated 2018-12-06 15:40:43 -07:00
Dennis Heimbigner
751300ec59 Fix more memory leaks in netcdf-c library
This is a follow up to PR https://github.com/Unidata/netcdf-c/pull/1173

Sorry that it is so big, but leak suppression can be complex.

This PR fixes all remaining memory leaks -- as determined by
-fsanitize=address, and with the exceptions noted below.

Unfortunately. there remains a significant leak that I cannot
solve. It involves vlens, and it is unclear if the leak is
occurring in the netcdf-c library or the HDF5 library.

I have added a check_PROGRAM to the ncdump directory to show the
problem.  The program is called tst_vlen_demo.c To exercise it,
build the netcdf library with -fsanitize=address enabled. Then
go into ncdump and do a "make clean check".  This should build
tst_vlen_demo without actually executing it.  Then do the
command "./tst_vlen_demo" to see the output of the memory
checker.  Note the the lost malloc is deep in the HDF5 library
(in H5Tvlen.c).

I am temporarily working around this error in the following way.
1. I modified several test scripts to not execute known vlen tests
   that fail as described above.
2. Added an environment variable called NC_VLEN_NOTEST.
   If set, then those specific tests are suppressed.

This should mean that the --disable-utilities option to
./configure should not need to be set to get a memory leak clean
build.  This should allow for detection of any new leaks.

Note: I used an environment variable rather than a ./configure
option to control the vlen tests. This is because it is
temporary (I hope) and because it is a bit tricky for shell
scripts to access ./configure options.

Finally, as before, this only been tested with netcdf-4 and hdf5 support.
2018-11-15 10:00:38 -07:00
luz.paz
74fbacdb82 Misc. source comment typos
Some are user-facing. Found via `codespell` and through the downstream FreeCAD.
2018-04-26 23:04:01 -04:00
Dennis Heimbigner
3e47f5f300 Rebuilt the filter parameter handling code to use a common
parser everywhere.
2018-01-23 16:00:11 -07:00
Dennis Heimbigner
d37ac215e2 Add new capabilities to filter code:
1. Allow nccopy to apply filters, especially on the output file.
   This provides a third way to do this other than using ncgen or
   programatically
2. Make sure that even if the filter code is not available, it is
   possible to see the filter id and parameters for variables using
   e.g ncdump -hs.
3. Fix bug in nccopy so that the input file does
   not necessarily have to be netcdf-4.
4. At last minute decided to change to using a
   single "_Filter" attribute for ncgen
5. Added a test to tst_filter.sh to generate C code using ncgen.
2017-05-14 18:10:02 -06:00
Dennis Heimbigner
7c3164577e Finalize the compression support.
This relies on the HDF5 capability to
dynamically load compression filters.
Note that a compression filter is just
a subcase of filters.

The primary user-visible changes are as follows:
1. Add a standard header "netcdf_filter.h" that defines
   the necessary API extensions
2. Modify ncgen to support two new special attributes
   "_Filter_ID" and "_Filter_Parameters" so that compression
   can be turned on when creating a file using ncgen.
4. Add a detailed description of filtering support
   to the user's guide; see the file filters.md
5. Add a test case directory for this: nc_test4/filter_test.
   It is fragile and a ./configure flags (-enable-filter-test)
   is defined (default disabled) to shut this off this test
   to avoid spurious 'make check' failures.

Note that the HDF5 documentation is not up-to-date, so
much of what is encoded here comes from examining the
actual code in the file H5PL.c in the HDF5 source code.
2017-04-27 13:01:59 -06:00
Dennis Heimbigner
3db4f013bf Primary change: add dap4 support
Specific changes:
1. Add dap4 code: libdap4 and dap4_test.
   Note that until the d4ts server problem is solved, dap4 is turned off.
2. Modify various files to support dap4 flags:
	configure.ac, Makefile.am, CMakeLists.txt, etc.
3. Add nc_test/test_common.sh. This centralizes
   the handling of the locations of various
   things in the build tree: e.g. where is
   ncgen.exe located. See nc_test/test_common.sh
   for details.
4. Modify .sh files to use test_common.sh
5. Obsolete separate oc2 by moving it to be part of
   netcdf-c. This means replacing code with netcdf-c
   equivalents.
5. Add --with-testserver to configure.ac to allow
   override of the servers to be used for --enable-dap-remote-tests.
6. There were multiple versions of nctypealignment code. Try to
   centralize in libdispatch/doffset.c and include/ncoffsets.h
7. Add a unit test for the ncuri code because of its complexity.
8. Move the findserver code out of libdispatch and into
   a separate, self contained program in ncdap_test and dap4_test.
9. Move the dispatch header files (nc{3,4}dispatch.h) to
   .../include because they are now shared by modules.
10. Revamp the handling of TOPSRCDIR and TOPBUILDDIR for shell scripts.
11. Make use of MREMAP if available
12. Misc. minor changes e.g.
	- #include <config.h> -> #include "config.h"
	- Add some no-install headers to /include
	- extern -> EXTERNL and vice versa as needed
	- misc header cleanup
	- clean up checking for misc. unix vs microsoft functions
13. Change copyright decls in some files to point to LICENSE file.
14. Add notes to RELEASENOTES.md
2017-03-08 17:01:10 -07:00
Dennis Heimbigner
001598ddb6 support fixes for Github issue 323
Fixed issue 323 by properly adding padding
when generating the binary data for use
with nc_put_var/vara.
Also added second testcase.
2016-11-17 15:29:32 -07:00
Ward Fisher
ef2c6f9bc4 Things are working? 2016-05-11 15:31:17 -06:00
Dennis Heimbigner
11a259ad86 Add provenance info for netcdf-4 files.
This consists of a persistent attribute named
_NCProperties plus two computed attributes
_IsNetcdf4 and _SuperblockVersion.
See the 'Provenance Attributes' section
of docs/attribute_conventions.md for details.
2016-05-07 14:32:07 -06:00
dmh
859f105005 merge-squash 2015-08-15 16:26:35 -06:00
Russ Rew
6ca14d8a78 Update ncgen code and docs to use nco-type format codes and deprecate use of confusing format version numbers 2014-12-28 10:44:21 -07:00
dmh
c99058741a [NCF-265]
Ncgen is unable to resolve
ambiguous references to an enum
constant when two different enums
have same econstant name.

Solved by allowing more specific
forms for econstant references.
1. /.../enumname.enumconstname
2. enumname.enumconstname
3. enumconstname

Case 1 is resolved by using the econstant
in the specific enum definition. If none is
found, an error is reported.

Case 2 is resolved by
1. finding an enclosing group with an
   enum definition with the specified name
   and containing the specified econstant.
   If there are more than one, then an error is reported
2. finding all enum definitions in the dataset that have
   the specified enum name and contain the specified
   econstant. If more than one is found, then an error is reported.
If the above two methods fail, then report an error.

Case 3 is similar to case 2, but all enums, irrespective
of name are used if they contains the specified enum constant.

The ref_tst_econst.cdl test in ncdump is causing ncdump
to fail. So there may be yet some problem.
2013-09-20 20:43:09 -06:00
Ward Fisher
a90b386e0a Refactored 'Constant' to 'NCConstant' in ncgen/ to avoid
reserved word collision on Windows.

Added tst_ncgen4_classic.sh to CMake-based builds.
2013-07-16 20:22:48 +00:00
Dennis Heimbigner
483cbf94fe Added code to support NIL
values for strings in ncgen.
Needs test cases.
2013-07-10 20:00:48 +00:00
Ward Fisher
8ee802170d 2012-09-11 20:58:47 +00:00
Ward Fisher
a900a4a399 2012-09-11 20:17:24 +00:00
Ward Fisher
d6c7112481 2012-09-11 19:53:47 +00:00
Dennis Heimbigner
ea1af11655 Resolve Lynton's vlen problems (partially) re: jira NCF-145 2012-02-14 00:25:32 +00:00
Dennis Heimbigner
599f35d2e6 fix appel problems with data lists 2012-01-09 18:39:37 +00:00
Dennis Heimbigner
fec4cdb230 Fixed the following Jira minor bugs:
NCF-42: _Format attribute sometimes being ignored
NCF-43: Fixed unsigned long long parsing.
NCF-47: Make opendap code properly handle illegal names like "x.y" by
        supressing them
NCF-49: check for uint type
NCF-50: properly handle username:pwd embedded in urls.
2011-05-12 17:51:32 +00:00
Dennis Heimbigner
b2c05fa4d0 fixed:
ncgen: nan bug
       made semicolons optional after type decls
libncdap{3,4}: revamped the NC surrogate to better match
       with libsrc
libdispatch: Added a new_nc function to the dispatch table; its purpose
                 is to allow hierarchical use of NC compatible data structures.
libsrc: cleaned up the NC structure by removing drno field
general: removed --with-oc options
2010-11-09 22:53:03 +00:00
Dennis Heimbigner
c9a566a42c rebuilt the handling of character datalists to support unlimiteds properly 2010-07-29 20:37:05 +00:00
Ed Hartnett
c464dfe430 Distcheck build was broken, so reverted to working revision of trunk 2010-07-10 14:26:30 +00:00
Dennis Heimbigner
0ed66db735 merge new oc 2010-07-10 01:26:24 +00:00
Ed Hartnett
2d509f2d9b removed C++ style comment 2010-07-09 22:22:50 +00:00
Ed Hartnett
18f4bca367 moving to trunk subdir 2010-06-03 13:24:43 +00:00