Unpack an array summary into its double precision and integer 
   components. 

   DAF 

   Variable  I/O  Description 
   --------  ---  -------------------------------------------------- 
   sum        I   Array summary. 
   nd         I   Number of double precision components. 
   ni         I   Number of integer components. 
   dc         O   Double precision components. 
   ic         O   Integer components. 

   sum         is an array summary. This identifies the contents and 
               location of a single array within a DAF. 

   nd          is the number of double precision components in 
               the summary. 

   ni          is the number of integer components in the summary. 

   dc          are the double precision components of the summary. 

   ic          are the integer components of the summary. 

    None. 

   The components of array summaries are packed into double 
   precision arrays for reasons outlined in [1]. Two routines, 
   DAFPS (pack summary) and dafus_c (unpack summary) are provided 
   for packing and unpacking summaries. 

   The total size of the summary is 

           (ni - 1) 
      nd + -------- + 1 
               2 

   double precision words (where nd, ni are nonnegative). 

   In the following code fragment, dafopr_c is used to open a file, 
   which is then searched for DAFs containing data for a particular 
   object.  dafus_c is used to unpack the summaries so the applicability
   of the segments can be determined.


      #include "SpiceUsr.h"
           .
           .
           .
      dafopr_c ( fname, &handle ); 
      dafbfs_c ( handle );

      daffna_c ( &found );

      while ( found ) 
      {
         dafgs_c ( sum );
         dafus_c ( sum, ND, NI, dc, ic );

         if ( ic[0] == target_object ) 
         { 
            . 
            . 
            . 
         }

         daffna_c ( &found );
      }

   None. 

   Error free. 

   1) If nd is zero or negative, no double precision components 
      are returned. 

   2) If ni is zero or negative, no integer components are returned. 

   3) If the total size of the summary is greater than 125 double 
      precision words, some components may not be returned. 

   None. 

   N.J. Bachman    (JPL)
   I.M. Underwood  (JPL) 

   NAIF Document 167.0, "Double Precision Array Files (DAF) 
   Specification and User's Guide" 

   -CSPICE Version 1.0.0, 01-AUG-1999 (NJB), (IMU)

   unpack daf summary