1 files changed, 26 insertions, 0 deletions
diff --git a/sys/osb/f77upk.f b/sys/osb/f77upk.f
new file mode 100644
index 00000000..fc875008
--- /dev/null
+++ b/sys/osb/f77upk.f
@@ -0,0 +1,26 @@
+c F77UPK -- Convert a Fortran 77 string into an SPP string.  Unpack
+c each Fortran character into an SPP char and trim the blank padding
+c at the right.
+c
+        subroutine f77upk (f77str, sppstr, maxch)
+c
+        character*(*)	f77str
+        integer*2	sppstr(*)
+        integer		maxch
+        integer		lastch, nchars, i
+        integer		EOS, BLANK
+        parameter	(EOS=0, BLANK=32)
+c
+c -- Unpack string.
+ 	nchars = min (maxch, len(f77str))
+	lastch = 0
+        do 10 i = 1, nchars
+            sppstr(i) = ichar (f77str(i:i))
+	    if (sppstr(i) .gt. BLANK) lastch = i
+ 10     continue
+c
+c -- Add EOS delimiter to SPP string, trimming blank padding at right.
+	if (lastch .gt. maxch) lastch = maxch
+	sppstr(lastch+1) = EOS
+c
+        end