It seems that nc_inq_var_deflate, nc_inq_var_fletcher32, and
nc_inq_var_endian all work with hdf4 files; i.e., they report no
compression, no checksum, and the correct endian (on my machine),
respectively. It's the nc_inq_var_chunking call that is the odd man out.
By the way -- not sure if I misinterpreted this:
> it will return an error because that is the only value
> that can be returned by netcdf API functions.
I just meant that it seems like it would be a clean solution if
nc_inq_var_chunking set *storagep to NC_CONTIGUOUS and returned without
generating an error if given a hdf4 format file, since, as far as I know,
no hdf4 format file can have chunked variables.
Regards,
--Dave
On Mon, Aug 19, 2013 at 10:23 AM, Dennis Heimbigner <dmh@xxxxxxxxxxxxxxxx>wrote:
> I think we can fix this; it will return
> an error because that is the only value
> that can be returned by netcdf API functions.
>
> Are there other netcdf operations not
> available on HDF4 files? Compression, for
> example?
>
> =Dennis Heimbigner
> Unidata
>
>
> David W. Pierce wrote:
>
>> Hi all,
>>
>> Using netcdf version 4.3.0, the library segfaults if a hdf4 format file is
>> passed to the nc_inq_var_chunking routine.
>>
>> It would be nice to be able to avoid this. Two solutions spring to mind:
>>
>> 1) Could the nc_inq_var_chunking routine be changed so that it simply
>> reports that any variable in a hdf4 format file is not chunked? Or,
>> perhaps
>> not as good but still serviceable, return an error code in this event?
>>
>> 2) Barring that, is there any way for user code to find out if the library
>> is accessing a hdf4 format file, so that the user code can avoid the call
>> to nc_inq_var_chunking in the first place?
>>
>> Regards,
>>
>> --Dave
>>
>>
>>
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--
David W. Pierce
Division of Climate, Atmospheric Science, and Physical Oceanography
Scripps Institution of Oceanography, La Jolla, California, USA
(858) 534-8276 (voice) / (858) 534-8561 (fax) dpierce@xxxxxxxx
