1 files changed, 64 insertions, 0 deletions
diff --git a/sys/plio/zzlib.x b/sys/plio/zzlib.x
new file mode 100644
index 00000000..fe21d849
--- /dev/null
+++ b/sys/plio/zzlib.x
@@ -0,0 +1,64 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<plio.h>
+
+# PL_CHKFREE -- Verify that the count of free space in the linelist is
+# correct. (DEBUG TOOL).
+
+procedure pl_chkfree (pl, msg)
+
+pointer	pl			#I mask descriptor
+char	msg[ARB]		#I message to be printed if error occurs
+
+pointer	o_lp
+short	nref[8192], nl
+int	used, free, nused, nfree, b_len, i
+
+begin
+	used = 0;  nused = 0
+	free = 0;  nfree = 0
+
+	# Count the space in the active line lists.
+	nl = 0
+	for (i=0;  i < PL_LLOP(pl);  i=i+b_len) {
+	    o_lp = Ref (pl, i)
+	    b_len = LP_BLEN(o_lp)
+
+	    nl = nl + 1
+	    nref[nl] = LP_NREF(o_lp)
+
+	    if (LP_NREF(o_lp) < 0) {
+		call eprintf ("lineoff %d, nref = %d\n")
+		    call pargi (i)
+		    call pargi (LP_NREF(o_lp))
+		free = free + b_len
+		nfree = nfree + 1
+	    } else if (i == PL_EMPTYLINE || LP_NREF(o_lp) > 0) {
+		used = used + b_len
+		nused = nused + 1
+	    } else {
+		free = free + b_len
+		nfree = nfree + 1
+	    }
+	}
+
+	if (free != PL_LLFREE(pl)) {
+	    call eprintf ("CHKFREE (%s): used=%d,%d, free=%d,%d, ")
+		call pargstr (msg)
+		call pargi (used)
+		call pargi (nused)
+		call pargi (free)
+		call pargi (nfree)
+	    call eprintf ("PL_LLFREE=%d, OP-FREE=%d\n")
+		call pargi (PL_LLFREE(pl))
+		call pargi (PL_LLOP(pl) - PL_LLFREE(pl))
+
+	    do i = 1, nl {
+		call eprintf ("%4d")
+		    call pargs (nref[i])
+		if (mod (i,19) == 0)
+		    call eprintf ("\n")
+	    }
+	    call eprintf ("\n")
+	}
+end