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cspice_dafcls
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Abstract
I/O
Examples
Particulars
Required Reading
Version
Index_Entries

Abstract


   CSPICE_DAFCLS closes the DAF referred to by a handle.

I/O


   Given:

      handle   file handle referring to a DAF.

               [1,1] = size(handle); int32 = class(handle)

   the call:

      cspice_dafcls( handle )

   closes the DAF, i.e. removes the file from read or write
   access by the SPICE DAF subsystem.

   Use this routine to close files opened by cspice_dafopr and
   cspice_dafopw.

   returns:

      None.

Examples


   Any numerical results shown for this example may differ between
   platforms as the results depend on the SPICE kernels used as input
   and the machine specific arithmetic implementation.

   Use a simple function to output the double precision and integer
   values stored in an SPK's segments descriptors. This function opens
   a DAF for read, performs a forwards search for the DAF arrays,
   prints the segment description for each array found, then closes the DAF.

   function daf_t( kernel)

      %
      % Open a DAF for read. Return a 'handle' referring to the file.
      %
      handle = cspice_dafopr( kernel );

      %
      % Define the summary parameters appropriate
      % for an SPK file.
      %
      ND = 2;
      NI = 6;

      %
      % Begin a forward search on the file.
      %
      cspice_dafbfs( handle );

      %
      % Search until a DAF array is found.
      %
      found = cspice_daffna;

      %
      % Loop while the search finds subsequent DAF arrays.
      %
      while found

         [dc, ic ] = cspice_dafgs( ND, NI );

         fprintf( 'Doubles:  ' )
         fprintf( '%f   ', dc )
         fprintf( '\n' )

         fprintf( 'Integers: ' )
         fprintf( '%d   ', ic )
         fprintf( '\n\n' )


         %
         % Check for another segment.
         %
         found = cspice_daffna;

      end

      %
      % Safely close the DAF.
      %
      cspice_dafcls( handle )

   Matlab outputs:

      >> daf_t( 'de421.bsp' )

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 1   0   1   2   641   310404

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 2   0   1   2   310405   423048

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 3   0   1   2   423049   567372

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 4   0   1   2   567373   628976

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 5   0   1   2   628977   674740

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 6   0   1   2   674741   715224

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 7   0   1   2   715225   750428

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 8   0   1   2   750429   785632

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 9   0   1   2   785633   820836

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 10   0   1   2   820837   944040

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 301   3   1   2   944041   1521324

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 399   3   1   2   1521325   2098608

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 199   1   1   2   2098609   2098620

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 299   2   1   2   2098621   2098632

      Doubles:  -3169195200.000000   1696852800.000000
      Integers: 499   4   1   2   2098633   2098644

   Note, the specific contents of 'ic' and 'dc' depend on the
   type of DAF.

   Note, the final entries in the integer array contain the segment
   start/end indexes. The output indicates the search proceeded
   from the start of the file (low value index) towards the end
   (high value index).

Particulars


   Because the DAF subsystem must keep track of what files are open at
   any given time, it is important that DAF files be closed only with
   cspice_dafcls, to prevent the remaining DAF routines from failing,
   sometimes mysteriously.

   Note that when a file is opened more than once for read access,
   cspice_dafopr returns the same handle each time it is re-opened.
   Each time the file is closed, cspice_dafcls checks to see if any other
   claims on the file are still active before physically closing

Required Reading


   For important details concerning this module's function, please refer to
   the CSPICE routine dafcls_c.

   MICE.REQ
   DAF.REQ

Version


   -Mice Version 1.0.0, 10-JUL-2012, EDW (JPL)

Index_Entries


   close DAF


Wed Apr  5 18:00:30 2017