1 files changed, 36 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/ratlibr/slstr.r b/unix/boot/spp/rpp/ratlibr/slstr.r
new file mode 100644
index 00000000..92d82123
--- /dev/null
+++ b/unix/boot/spp/rpp/ratlibr/slstr.r
@@ -0,0 +1,36 @@
+include	defs
+
+# slstr --- slice a substring from a string
+
+   integer function slstr (from, to, first, chars)
+   character from (ARB), to (ARB)
+   integer first, chars
+
+   integer len, i, j, k
+   integer length
+
+   len = length (from)
+
+   i = first
+   if (i < 1)
+      i = i + len + 1
+
+   if (chars < 0) {
+      i = i + chars + 1
+      chars = - chars
+      }
+
+   j = i + chars - 1
+   if (i < 1)
+      i = 1
+   if (j > len)
+      j = len
+
+   for (k = 0; i <= j; k = k + 1) {
+      to (k + 1) = from (i)
+      i = i + 1
+      }
+   to (k + 1) = EOS
+
+   return (k)
+   end