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C----------------------------------------------------------------------
subroutine ftchfl(iunit,status)
C Check Header Fill values
C Check that the header unit is correctly filled with blanks from the
C END card to the end of the current FITS 2880-byte block
C iunit i fortran unit number
C status i output error status
C
C written by Wm Pence, HEASARC/GSFC, June, 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
logical gotend
if (status .gt. 0)return
ibuff=bufnum(iunit)
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 find the END card (there may be blank keywords perceeding it)
gotend=.false.
do 10 i=1,nblank
call ftgcbf(iunit,1,80,rec,status)
if (rec(1:8) .eq. 'END ')then
if (gotend)then
C there is a duplicate END record
status=254
call ftpmsg('Warning: Header fill area contains '//
& 'duplicate END card:')
end if
gotend=.true.
if (rec(9:80) .ne. ' ')then
C END keyword has extra characters
status=253
call ftpmsg('Warning: END keyword contains '//
& 'extraneous non-blank characters:')
end if
else if (gotend)then
if (rec .ne. ' ')then
C The fill area contains extraneous characters
status=254
call ftpmsg('Warning: Header fill area contains '//
& 'extraneous non-blank characters:')
end if
end if
if (status .gt. 0)then
call ftpmsg(rec)
return
end if
10 continue
end
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