1 files changed, 20 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/ratlibr/sdrop.r b/unix/boot/spp/rpp/ratlibr/sdrop.r
new file mode 100644
index 00000000..fb3169cd
--- /dev/null
+++ b/unix/boot/spp/rpp/ratlibr/sdrop.r
@@ -0,0 +1,20 @@
+include	defs
+
+# sdrop --- drop characters from a string APL-style
+
+   integer function sdrop (from, to, chars)
+   character from (ARB), to (ARB)
+   integer chars
+
+   integer len, start
+   integer ctoc, length, min0
+
+   len = length (from)
+   if (chars < 0)
+      return (ctoc (from, to, len + chars + 1))
+   else {
+      start = min0 (chars, len)
+      return (ctoc (from (start + 1), to, len + 1))
+      }
+
+   end