1 files changed, 58 insertions, 0 deletions
diff --git a/pkg/tbtables/fitsio/ftchdu.f b/pkg/tbtables/fitsio/ftchdu.f
new file mode 100644
index 00000000..0e125727
--- /dev/null
+++ b/pkg/tbtables/fitsio/ftchdu.f
@@ -0,0 +1,58 @@
+C----------------------------------------------------------------------
+        subroutine ftchdu(iunit,status)
+
+C       Close Header Data Unit
+C       If we have write access to the file, then close the current HDU by:
+C                 -padding remaining space in the header with blanks
+C                 -writing the END keyword in the CHU
+C                 -check the data fill values, and rewrite them if not correct
+C                 -flushing the current buffer to disk
+C                 -recover common block space containing column descriptors
+
+C       iunit   i  fortran unit number
+C       status  i  output error status
+C
+C       written by Wm Pence, HEASARC/GSFC, June, 1991
+
+        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
+
+C       ignore input status and close HDU regardless of input status value
+
+        ibuff=bufnum(iunit)
+
+C       see if we have write access to this file
+        if (wrmode(ibuff))then
+C           rewrite the header END card and the following blank fill, and
+C           insure that the internal data structure matches the keywords
+            call ftrdef(iunit,status)
+
+C           write the correct data fill values, if they are not already correct
+            call ftpdfl(iunit,status)
+        end if
+
+C       set current column name buffer as undefined
+        call ftrsnm
+
+C       flush the buffers holding data for this HDU
+        call ftflsh(ibuff,status)
+
+C       recover common block space containing column descriptors for this HDU
+        call ftfrcl(iunit,status)
+
+        if (status .gt. 0)then
+            call ftpmsg('Error while closing current HDU (FTCHDU).')
+        end if
+        end