1 files changed, 37 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/ratlibr/ctoi.r b/unix/boot/spp/rpp/ratlibr/ctoi.r
new file mode 100644
index 00000000..54a5769b
--- /dev/null
+++ b/unix/boot/spp/rpp/ratlibr/ctoi.r
@@ -0,0 +1,37 @@
+include	defs
+
+# ctoi - convert string at in(i) to integer, increment i
+
+   integer function ctoi(in, i)
+   character in (ARB)
+   integer i
+
+   integer d
+   external index
+   integer index
+
+   # string digits "0123456789"
+   character digits(11)
+   data digits (1) /DIG0/,
+      digits (2) /DIG1/,
+      digits (3) /DIG2/,
+      digits (4) /DIG3/,
+      digits (5) /DIG4/,
+      digits (6) /DIG5/,
+      digits (7) /DIG6/,
+      digits (8) /DIG7/,
+      digits (9) /DIG8/,
+      digits (10) /DIG9/,
+      digits (11) /EOS/
+
+   while (in (i) == BLANK | in (i) == TAB)
+      i = i + 1
+   for (ctoi = 0; in (i) != EOS; i = i + 1) {
+      d = index (digits, in (i))
+      if (d == 0)      # non-digit
+	 break
+      ctoi = 10 * ctoi + d - 1
+      }
+
+   return
+   end