Initial commit

1 files changed, 58 insertions, 0 deletions

diff --git a/pkg/tbtables/fitsio/ftdhdu.f b/pkg/tbtables/fitsio/ftdhdu.f
new file mode 100644
index 00000000..6f39a37c
--- /dev/null
+++ b/pkg/tbtables/fitsio/ftdhdu.f
@@ -0,0 +1,58 @@
+C--------------------------------------------------------------------------
+        subroutine ftdhdu(ounit,typhdu,status)
+
+C       delete the current HDU (as long as it is not the primary array)
+
+C       ounit   i  fortran output unit number
+C       typhdu  i  type of the new CHDU, after deleting the old CHDU
+C       status  i  returned error status (0=ok)
+
+        integer ounit,typhdu,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
+        character*1 buff(5760)
+        common/ftheap/buff
+C       END OF COMMON BLOCK DEFINITIONS:------------------------------------
+
+        integer ibuff,nhdu,nblock
+
+        if (status .gt. 0)return
+
+C       get the number of the data buffer used for this unit
+        ibuff=bufnum(ounit)
+
+        nhdu=chdu(ibuff)
+        if (nhdu .eq. 1)then
+C            cannot delete the primary array
+             status=301
+             return
+        end if
+
+C       close the CHDU first, to flush buffers and free memory
+        call ftchdu(ounit,status)
+
+C       how many blocks to delete?
+        nblock=(hdstrt(ibuff,nhdu+1)-hdstrt(ibuff,nhdu))/2880
+        if (nblock .lt. 1)return
+
+C       delete the blocks
+        call ftdblk(ounit,nblock,1,status)
+        if (status .gt. 0)return
+
+C       try reinitializing the CHDU, if there is one
+        call ftrhdu(ounit,typhdu,status)
+        if (status .gt. 0)then
+C            there is no HDU after the one we just deleted so move back one HDU
+             status=0
+             call ftcmsg
+             call ftgext(ounit,nhdu-1,typhdu,status)
+        end if
+        end