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Re: 961028: ? Variable put/get for array of values > 64KB

>To: address@hidden
>From: address@hidden
>Subject: ? Variable put/get for array of values > 64KB
>Organization: NOAA/NGDC, Paleoclimatology Group
>Keywords: 199610282142.AA16789

Hi Wendy,


Sorry about the delay in answering your question.

> I am using netcdf to develop an application for a Windows
> 16 bit application and I have arrays of data that are greater 
> than 64KB that I would like to put and get, to and from 
> a netcdf file in one chunk. Can I do this with netcdf 
> library calls?
>   code example:
> 
>   . . . 
>   char huge *mydata = glock(globalHandleToMemory);
>   // Initialize mydata and netcdf file
>   . . .
>   ncvarput( ..., (void*)mydata).
>   . . .
> 
> 
> Can ncvarput and ncvarget deal with a pointer to huge
> memory? 

No, unfortunately we don't support a variety of memory models for 16-bit
architectures in the netCDF library.  When we added support for 16-bit
architectures back in 1993, we modified our utilities such as ncdump so
that they only deal with 64KB or smaller chunks.

If you can use the Borland compiler, Ken Prada of Woods Hole compiled a
previous library version to support small, medium, large, and huge
memory models, and has donated the compiled binary library versions.
For more information, see the files in

  ftp://ftp.unidata.ucar.edu/pub/netcdf/contrib/borland/

With netCDF 2.4, we provide support for the "DJGPP" development
environment.  DJGPP is a port of the GNU C development environment to
MSDOS, freely-available from:

            ftp://ftp.coast.net/SimTel/vendors/djgpp/

and other archives, and requiring 80386 CPU or better.  This environment
supports accessing arrays of data that are greater than 64KB, because it
uses 32-bit addresses.

--Russ

_____________________________________________________________________

Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu