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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
include <imhdr.h>
include "idb.h"
# IMDELF -- Delete a user field from the image header. It is an error if the
# named field does not exist.
procedure imdelf (im, key)
pointer im # image descriptor
char key[ARB] # name of the new parameter
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 (key, Memc[keyname], IDB_SZFITSKEY)
call strupr (Memc[keyname])
# Cannot delete standard header keywords.
if (idb_kwlookup (key) > 0)
call syserrs (SYS_IDBNODEL, key)
# Verify that the named user field exists.
if (idb_findrecord (im, key, rp) <= 0)
call syserrs (SYS_IDBDELNXKW, key)
# Delete the field.
off = stridxs ("\n", Memc[rp])
if (off > 0)
call strcpy (Memc[rp+off], Memc[rp], ARB)
else
Memc[rp] = EOS
call sfree (sp)
end
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