1 files changed, 58 insertions, 0 deletions
diff --git a/pkg/tbtables/fitsio/ftpnul.f b/pkg/tbtables/fitsio/ftpnul.f
new file mode 100644
index 00000000..c46152b9
--- /dev/null
+++ b/pkg/tbtables/fitsio/ftpnul.f
@@ -0,0 +1,58 @@
+C--------------------------------------------------------------------------
+        subroutine ftpnul(ounit,blank,status)
+
+C       Primary Null value definition
+C       Define the null value for an integer primary array.
+C
+C       ounit   i  Fortran I/O unit number
+C       blank   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,blank,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,i,ngroup
+
+        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) .ne. 0)then
+            status=233
+            return
+        end if
+            
+C       the primary array is actually interpreted as a binary table.  There
+C       are two columns for each group: the first column contains the 
+C       group parameters, if any, and the second column contains the
+C       primary array of data. 
+
+        ngroup=tfield(ibuff)/2
+        do 10 i=1,ngroup
+                tnull(i*2+tstart(ibuff))=blank
+10      continue
+        end