1 files changed, 20 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/ratlibr/stake.r b/unix/boot/spp/rpp/ratlibr/stake.r
new file mode 100644
index 00000000..52a9a096
--- /dev/null
+++ b/unix/boot/spp/rpp/ratlibr/stake.r
@@ -0,0 +1,20 @@
+include	defs
+
+# stake --- take characters from a string APL-style
+
+   integer function stake (from, to, chars)
+   character from (ARB), to (ARB)
+   integer chars
+
+   integer len, start
+   integer length, ctoc, max0
+
+   len = length (from)
+   if (chars < 0) {
+      start = max0 (len + chars, 0)
+      return (ctoc (from (start + 1), to, len + 1))
+      }
+   else
+      return (ctoc (from, to, chars + 1))
+
+   end