Procedure

   void dafopr_c ( ConstSpiceChar    * fname,
                   SpiceInt          * handle  ) 

Abstract

 
   Open a DAF for subsequent read requests. 
 

Required_Reading

 
   DAF 
 

Keywords

 
   DAF 
   FILES 
 

Brief_I/O

 
   Variable  I/O  Description 
   --------  ---  -------------------------------------------------- 
   fname      I   Name of DAF to be opened. 
   handle     O   Handle assigned to DAF. 
 

Detailed_Input

 
   fname       is the file name of a DAF to be opened for read 
               access. 
 

Detailed_Output

 
   handle      is the file handle associated with the file. This 
               handle is used to identify the file in subsequent 
               calls to other DAF routines. 
 

Parameters

 
  None. 
 

Exceptions

 
   1) If the specified file has already been opened for read 
      access, the handle already associated with the file is 
      returned. 
 
   2) If the specified file has already been opened for write 
      access, the error SPICE(DAFRWCONFLICT) is signaled. 
 
   3) If the specified file has already been opened by a non-DAF 
      routine, the error SPICE(DAFIMPROPOPEN) is signaled. 
 
   4) If the specified file cannot be opened without exceeding 
      the maximum number of files, the error SPICE(DAFFTFULL) 
      is signaled. 
 
   5) If (for some reason) the file cannot be opened properly, 
      the error SPICE(DAFOPENFAIL) is signaled. 
 
   6) If the attempt to read the file's ID word fails, the error 
      SPICE(FILEREADFAILED) will be signaled. 
 
   7) If the specified file is not a DAF file, as indicated by the 
      file's ID word, the error SPICE(NOTADAFFILE) is signaled. 
 
   8) If no logical units are available, the error will be 
      signaled by routines called by this routine. 
 
   9) If the file does not exist, the error SPICE(FILEDOESNOTEXIST) 
      is signaled. 
 
  10) If the INQUIRE fails, the error SPICE(INQUIREFAILED) 
      is signaled. 
 
  11) If the file record cannot (for some reason) be read, 
      the error SPICE(DAFFRNOTFOUND) is signaled. 
 
  12) If the file name is blank, the error SPICE(BLANKFILENAME) 
      is signaled. 
 

Files

 
   See argument fname. 
 

Particulars

 
   Most DAFs require only read access. If you do not need to 
   change the contents of a file, you should open it with dafopr_c. 
 

Examples

 
   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. 
 
      #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 );
      }
      
 

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) 
   J.M. Lynch      (JPL) 
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
 

Version

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

Index_Entries

 
   open daf for read 
 

Link to routine dafopr_c source file dafopr_c.c