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C----------------------------------------------------------------------
subroutine ftwend(iunit,status)
C write the END card, and following fill values in the CHDU
C iunit i fortran unit number
C status i output error status
C
C written by Wm Pence, HEASARC/GSFC, Aug 1994
integer iunit,status
C COMMON BLOCK DEFINITIONS:--------------------------------------------
integer nb,ne
parameter (nb = 20)
parameter (ne = 200)
integer bufnum,chdu,hdutyp,maxhdu,hdstrt,hdend,nxthdr,dtstrt
integer nxtfld
logical wrmode
common/ft0001/bufnum(199),chdu(nb),hdutyp(nb),maxhdu(nb),
& wrmode(nb),hdstrt(nb,ne),hdend(nb),nxthdr(nb),dtstrt(nb),nxtfld
C END OF COMMON BLOCK DEFINITIONS-----------------------------------
integer ibuff,nblank,i,endpos
character*80 rec
if (status .gt. 0)return
ibuff=bufnum(iunit)
C calc the data starting position if not currently defined
if (dtstrt(ibuff) .lt. 0)then
dtstrt(ibuff)=(hdend(ibuff)/2880 + 1)*2880
end if
C calculate the number of blank keyword slots in the header
endpos=hdend(ibuff)
nblank=(dtstrt(ibuff)-endpos)/80
C move the i/o pointer to the end of the header keywords
call ftmbyt(iunit,endpos,.true.,status)
C fill all the slots with blanks
rec=' '
do 10 i=1,nblank
call ftpcbf(iunit,1,80,rec,status)
10 continue
C The END keyword must either be placed
C immediately after the last keyword that was written
C (as indicated by the HDEND parameter), or must be in the
C first 80 bytes of the FITS record immediately preceeding
C the data unit, whichever is further in the file.
C The latter will occur if the user reserved room for more
C header keywords which have not (yet) been filled.
C move pointer to where the END card should be
endpos=max(endpos,dtstrt(ibuff)-2880)
call ftmbyt(iunit,endpos,.true.,status)
C write the END record to the output buffer:
rec='END'
call ftpcbf(iunit,1,80,rec,status)
if (status .gt. 0)then
call ftpmsg('Error while writing END card (FTWEND).')
end if
end
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