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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
include <imhdr.h>
include "idb.h"
# IMRENF -- Rename a user field keyword. It is an error if the
# named field does not exist.
procedure imrenf (im, oldkey, newkey)
pointer im # image descriptor
char oldkey[ARB] # old keyword
char newkey[ARB] # new keyword
int off
pointer rp, sp, keyname
int idb_kwlookup(), idb_findrecord(), stridxs()
errchk syserrs
begin
call smark (sp)
call salloc (keyname, SZ_FNAME, TY_CHAR)
# FITS format requires that the keyword name be upper case.
call strcpy (oldkey, Memc[keyname], IDB_SZFITSKEY)
call strupr (Memc[keyname])
# Cannot delete standard header keywords.
if (idb_kwlookup (oldkey) > 0)
call syserrs (SYS_IDBNODEL, oldkey)
# Verify that the named user field exists.
if (idb_findrecord (im, oldkey, rp) <= 0)
call syserrs (SYS_IDBDELNXKW, oldkey)
# Rename the keyword.
call sprintf (Memc[keyname], IDB_SZFITSKEY, "%-8.8s")
call pargstr (newkey)
call strupr (Memc[keyname])
call amovc (Memc[keyname], Memc[rp], 8)
call sfree (sp)
end
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