From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 pkg/tbtables/fitsio/fttnul.f | 56 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 pkg/tbtables/fitsio/fttnul.f

(limited to 'pkg/tbtables/fitsio/fttnul.f')

diff --git a/pkg/tbtables/fitsio/fttnul.f b/pkg/tbtables/fitsio/fttnul.f
new file mode 100644
index 00000000..a1fa6be9
--- /dev/null
+++ b/pkg/tbtables/fitsio/fttnul.f
@@ -0,0 +1,56 @@
+C--------------------------------------------------------------------------
+        subroutine fttnul(ounit,colnum,inull,status)
+
+C       Table column NULl value definition
+C       Define the null value for a table column
+C
+C       ounit   i  Fortran I/O unit number
+C       colnum  i  number of the column to be defined
+C       inull   i  the value to be use to signify undefined data
+C       status  i  output error status (0 = ok)
+C
+C       written by Wm Pence, HEASARC/GSFC, June 1991
+
+        integer ounit,colnum,inull,status
+
+C       COMMON BLOCK DEFINITIONS:--------------------------------------------
+        integer nb,ne,nf
+        parameter (nb = 20)
+        parameter (ne = 200)
+        parameter (nf = 3000)
+        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
+        integer tfield,tstart,tbcol,rowlen,tdtype,trept,tnull,scount
+        integer theap,nxheap
+        double precision tscale,tzero
+        common/ft0002/tfield(nb),tstart(nb),tbcol(nf),rowlen(nb),
+     &  tdtype(nf),trept(nf),tscale(nf),tzero(nf),tnull(nf),scount(nb)
+     &  ,theap(nb),nxheap(nb)
+C       END OF COMMON BLOCK DEFINITIONS-----------------------------------
+        
+        integer ibuff
+
+        if (status .gt. 0)return
+
+        ibuff=bufnum(ounit)
+
+C       if HDU structure is not defined then scan the header keywords
+        if (dtstrt(ibuff) .lt. 0)call ftrdef(ounit,status)
+        if (status .gt. 0)return
+
+C       test for proper HDU type
+        if (hdutyp(ibuff) .eq. 0)then
+            status=235
+            return
+        end if
+
+        if (colnum .gt. tfield(ibuff) .or. colnum .lt. 1)then
+             status=302
+             return
+        end if
+
+        tnull(colnum+tstart(ibuff))=inull
+        end
-- 
cgit