void dafcls_c ( SpiceInt handle )
Close the DAF associated with a given handle.
DAF
DAF
FILES
Variable I/O Description
-------- --- --------------------------------------------------
handle I Handle of DAF to be closed.
handle is the file handle of a previously opened DAF file.
None.
None.
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.
None.
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.
Example (1):
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.
Example (2):
Use a simple routine 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 segments description for each array found, then
closes the DAF.
#include <stdio.h>
#include "SpiceUsr.h"
int main()
{
/.
Local constants
./
/.
Define the summary parameters appropriate
for an SPK file.
./
#define ND 2
#define NI 6
#define MAXSUM 125
SpiceInt ic [ NI ];
SpiceInt handle;
SpiceDouble dc [ ND ];
SpiceDouble sum [ MAXSUM ];
SpiceChar * kernel = "de421.bsp";
SpiceBoolean found;
/.
Open a DAF for read. Return a handle referring to the file.
./
dafopr_c ( kernel, &handle );
/.
Begin a forward search on the file.
./
dafbfs_c ( handle );
/.
Search until a DAF array is found.
./
daffna_c ( &found );
/.
Loop while the search finds subsequent DAF arrays.
./
while ( found )
{
dafgs_c ( sum );
dafus_c ( sum, ND, NI, dc, ic );
printf( " Doubles: %f %f \n", dc[0], dc[1] );
printf( "Integers: %d %d %d %d %d %d\n\n",
(int)ic[0], (int)ic[1], (int)ic[2],
(int)ic[3], (int)ic[4], (int)ic[5] );
/.
Check for another segment.
./
daffna_c ( &found );
}
/.
Safely close the DAF.
./
dafcls_c ( handle );
return ( 0 );
}
The program outputs:
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 final entries in the integer array contains 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).
None.
None.
N.J. Bachman (JPL)
K.R. Gehringer (JPL)
W.L. Taber (JPL)
I.M. Underwood (JPL)
-CSPICE Version 1.0.3, 28-JUN-2016 (EDW)
Edit to Example code, SpiceInts output as ints using
explicit casting.
-CSPICE Version 1.0.2, 10-OCT-2012 (EDW)
Added a functional code example to the Examples section.
Removed the obsolete Reference citation to "NAIF
Document 167.0."
-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)
close daf
Link to routine dafcls_c source file dafcls_c.c
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