1 files changed, 39 insertions, 0 deletions
diff --git a/pkg/tbtables/fitsio/ftplsw.f b/pkg/tbtables/fitsio/ftplsw.f
new file mode 100644
index 00000000..58d3d5d7
--- /dev/null
+++ b/pkg/tbtables/fitsio/ftplsw.f
@@ -0,0 +1,39 @@
+C--------------------------------------------------------------------------
+        subroutine ftplsw(ounit,status)
+
+C       Put Long String Warning:
+C       write the LONGSTRN keyword and a few COMMENT keywords to the header 
+C       (if they don't already exist) to warn users that this FITS file
+C       may use the OGIP long string convention.
+
+C       This subroutine should be called whenever FTPKLS is called.
+
+        integer ounit,status,tstat
+        character value*8,comm*8
+
+        if (status .gt. 0)return
+
+        tstat=status
+        call ftgkys(ounit,'LONGSTRN',value,comm,status)
+        if (status .eq. 0)then
+C             The keyword already exists so just exit
+              return
+         end if
+
+         status=tstat
+         call ftpkys(ounit,'LONGSTRN','OGIP 1.0',
+     &   'The OGIP Long String Convention may be used.',status)
+
+         call ftpcom(ounit,
+     & 'This FITS file may contain long string keyword values that are'
+     &  ,status)
+           call ftpcom(ounit,
+     & 'continued over multiple keywords.  The OGIP convention uses the'
+     &  //' &',status)
+            call ftpcom(ounit,
+     & 'character at the end of each substring which is then continued'       
+     &  ,status)
+            call ftpcom(ounit,
+     & 'on the next keyword which has the name CONTINUE.'
+     &  ,status)
+        end