Initial commit

1 files changed, 37 insertions, 0 deletions

diff --git a/pkg/tbtables/fitsio/ftxiou.f b/pkg/tbtables/fitsio/ftxiou.f
new file mode 100644
index 00000000..f75a1808
--- /dev/null
+++ b/pkg/tbtables/fitsio/ftxiou.f
@@ -0,0 +1,37 @@
+C------------------------------------------------------------------------------
+        subroutine ftxiou(iounit,status)
+
+C       generic routine to manage logical unit numbers in the range 50-99
+
+        integer iounit,status,i
+        integer*2 array(50)
+        save array
+        data array/50*0/
+
+        if (iounit .eq. 0)then
+C           get an unused logical unit number
+            do 10 i=50,1,-1
+                 if (array(i) .eq. 0)then
+                     array(i)=1
+                     iounit=i+49
+                     return
+                 end if
+10          continue
+C           error: all units are allocated
+            iounit=-1
+            status=114
+            call ftpmsg('FTGIOU has no more available unit numbers.')
+
+        else if (iounit .eq. -1)then
+C           deallocate all the unit numbers
+            do 20 i=1,50
+                 array(i)=0
+20          continue
+
+        else
+C            deallocat a specific unit number
+             if (iounit .ge. 50 .and. iounit .le. 99)then
+                 array(iounit-49)=0
+             end if
+        endif
+        end