Procedure

   void dafcls_c ( SpiceInt handle ) 

Abstract

 
   Close the DAF associated with a given handle. 
 

Required_Reading

 
   DAF 
 

Keywords

 
   DAF 
   FILES 
 

Brief_I/O

 
   Variable  I/O  Description 
   --------  ---  -------------------------------------------------- 
   handle     I   Handle of DAF to be closed. 
 

Detailed_Input

 
   handle      is the file handle of a previously opened DAF file. 
 

Detailed_Output

 
   None. 
 

Parameters

 
    None. 
 

Exceptions

 
   1) If the specified handle is not known to the DAF subsystem
      (because it does not belong to a file opened via the DAF
      API), nothing happens. 

   2) If this routine is used to close a file whose handle is
      known to the DAF subsystem, and if the file handle is
      attached to a non-DAF file, routines called by this 
      routine signal an error.
 

Files

 
   None. 
 

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
   dafcls_c, to prevent the remaining DAF routines from failing,
   sometimes mysteriously.
 
   Note that when a file is opened more than once for read access, 
   dafopr_c returns the same handle each time it is re-opened. 
   Each time the file is closed, dafcls_c checks to see if any other 
   claims on the file are still active before physically closing 
   the file. 
 

Examples

 
   In the following code fragment, the arrays in a file are examined in
   order to determine whether the file contains any arrays whose names
   begin with the word TEST. The complete names for these arrays are
   printed to the screen. The file is closed at the end of the search.
 
      #include "SpiceUsr.h"
          .
          .
          .
      dafopr_c ( fname, &handle ); 
      dafbfs_c ( handle );
      daffna_c ( &found );
 
      while ( found ) 
      {
         dafgn_c ( name );
 
         if (  strncmp( name, "TEST", 4 ) == 0  )  
         {
            printf ( "%s\n", name ); 
         }
         daffna_c ( &found );
      }
 
      dafcls_c ( handle );
      
 
   Note that if the file has been opened already by a DAF routine 
   at some other place in the calling program, it remains open. 
   This makes it possible to examine files that have been opened for 
   use by other modules without interfering with the operation of 
   those routines. 
 

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) 
   K.R. Gehringer  (JPL) 
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
 

Version

 
   -CSPICE Version 1.0.1, 28-JAN-2004 (NJB) 

      Header update:  the exceptions section now lists the
      case of attempting to close a non-DAF file using this
      routine.

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

Index_Entries

 
   close daf 
 

Link to routine dafcls_c source file dafcls_c.c