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dafgh_c
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Procedure
Abstract
Required_Reading
Keywords
Brief_I/O
Detailed_Input
Detailed_Output
Parameters
Exceptions
Files
Particulars
Examples
Restrictions
Literature_References
Author_and_Institution
Version
Index_Entries

Procedure

   void dafgh_c ( SpiceInt  * handle ) 

Abstract

 
   Return (get) the handle of the DAF currently being searched. 
 

Required_Reading

 
   DAF 
 

Keywords

 
   FILES 
 

Brief_I/O

 
   Variable  I/O  Description 
   --------  ---  -------------------------------------------------- 
   handle     O   Handle for current DAF. 
 

Detailed_Input

 
   None. 
 

Detailed_Output

 
   handle      is the handle for the current DAF (the handle 
               connected to the DAF that is currently being 
               actively searched). 
 

Parameters

 
   None. 
 

Exceptions

 
   1)  If this routine is called when no search is in progress in the 
       the current DAF, the error SPICE(DAFNOSEARCH) is signaled. 
 
   2)  If the DAF whose handle is to be returned has actually been 
       closed, the error will be diagnosed by routines called by 
       this routine. 
 

Files

 
   This function returns the handle of a DAF that is currently
   being searched.
 

Particulars

 
   Under rare circumstances, it may be necessary to identify 
   the particular DAF that is being searched (such as when 
   the search is begun by one module and continued by another). 
 

Examples

 
   Consider a program like the following, which examines the 
   individual arrays in a DAF and examines the contents of those 
   meeting certain criteria.  
 
      #include "SpiceUsr.h"
          ...
      dafopw_c ( fname, &handle );
      dafbfs_c ( handle );
      daffna_c ( &found ); 
 
      while ( found )
      {
         check_segment ( status );
 
         if (  eqstr_c( status, "EXAMINE" )  )
         {
            examine_segment();
         } 
 
         daffna_c ( &found );
      }
 
   The function check_segment, which assumes that a search is in 
   progress, gets the summary and name for the current array, and 
   uses them to decide whether the data in the array merit further 
   consideration. 
 
      void check_segment ( status ) 
        ...
      dafgs_c ( sum  );
      dafgn_c ( name );
      dafus_c ( sum, nd, ni, dc, ic );
        ...
      [ set status ]
        ...

 
   The function examine_segment examines the data in 
   the array itself. In order to do do, it needs to have access 
   not only to the summary, but to the handle of the file 
   containing the array. This is provided by dafgh_c. 
 
      void examine_segment()
        ...
      dafgs_c ( sum );
      dafus_c ( sum, nd, ni, dc, ic );
      dafgh_c ( &handle );
 
      dafgda_c ( handle, begin, end, data );
        ...
       
       

Restrictions

 
   None. 
 

Literature_References

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

Author_and_Institution

 
   N.J. Bachman    (JPL) 
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
 

Version

 
   -CSPICE Version 1.0.0, 19-JUL-2011 (NJB)

Index_Entries

 
   get daf handle 
 
Wed Apr  5 17:54:30 2017