void ckopn_c ( ConstSpiceChar * fname,
ConstSpiceChar * ifname,
SpiceInt * handle )
Open a new CK file, returning the handle of the opened file.
VARIABLE I/O DESCRIPTION
-------- --- --------------------------------------------------
fname I The name of the CK file to be opened.
ifname I The internal filename for the CK.
ncomch I The number of characters to reserve for comments.
handle O The handle of the opened CK file.
fname The name of the CK file to be opened.
ifname The internal filename for the CK file that is being
created. The internal filename may be up to 60 characters
long. If you do not have any conventions for tagging your
files, an internal filename of "CK_file" is perfectly
acceptable. You may also leave it blank if you like.
ncomch This is the space, measured in characters, to be
initially set aside for the comment area when a new CK
file is opened. The amount of space actually set aside
may be greater than the amount requested, due to the
manner in which comment records are allocated in an CK
file. However, the amount of space set aside for comments
will always be at least the amount that was requested.
The value of ncomch should be greater than or equal to
zero, i.e., 0 <= ncomch. A negative value, should one
occur, will be assumed to be zero.
handle The handle of the opened CK file. If an error occurs the
value of this variable will not represent a valid handle.
1) If the value of ncomch is negative, a value of zero will
be used for the number of comment characters to be set aside
2) If an error occurs while attempting to open a CK file the
value of handle will not represent a valid file handle.
See fname and handle.
Open a new CK file, reserving room for comments if requested.
Suppose that you want to create a new CK file called "new.ck"
that contains a single type 3 CK segment and has room for at
least 5000 comment characters. The following code fragment should
take care of this for you, assuming that all of the variables
passed to the CK type 3 segment writer have appropriate values.
fname = "new.ck";
ifname = "Test CK file";
ckopn_c ( fname, ifname, 5000, &handle );
ckw03_c ( handle, begtim, endtim, inst,
ref, avflag, segid, nrec,
sclkdp, quats, avvs, nints, starts );
ckcls_c ( handle );
N.J. Bachman (JPL)
K.R. Gehringer (JPL)
-CSPICE Version 1.1.1, 09-NOV-2006 (NJB)
Header comments indicating that `ncomch' is ignored have
-CSPICE Version 1.1.0, 08-FEB-1998 (NJB)
References to C2F_CreateStr_Sig were removed; code was
cleaned up accordingly. String checks are now done using
the macro CHKFSTR.
-CSPICE Version 1.0.0, 25-OCT-1997 (NJB)
Based on SPICELIB Version 1.0.0, 26-JAN-1995 (KRG)
open a new ck file