1 files changed, 57 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/e/lune.c b/vere/pkg/noun/jets/e/lune.c
new file mode 100644
index 0000000..1187073
--- /dev/null
+++ b/vere/pkg/noun/jets/e/lune.c
@@ -0,0 +1,57 @@
+/// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+
+  u3_noun
+  u3qe_lune(u3_atom lub)
+  {
+    if (lub == 0) {
+      return u3_nul;
+    }
+
+    {
+      c3_w end_w  = u3r_met(3, lub) - 1;
+      c3_w pos_w  = end_w;
+      u3_noun lin = u3_nul;
+
+      if (u3r_byte(pos_w, lub) != 10) {
+        return u3m_error("noeol");
+      }
+
+      if (pos_w == 0) {
+        return u3nc(u3_nul, lin);
+      }
+
+      while (--pos_w) {
+        if (u3r_byte(pos_w, lub) == 10) {
+          lin = u3nc(u3qc_cut(3, (pos_w + 1), (end_w - pos_w - 1), lub), lin);
+          end_w = pos_w;
+        }
+      }
+
+      if (u3r_byte(pos_w, lub) == 10) {
+        return u3nc(u3_nul,
+                    u3nc(u3qc_cut(3, (pos_w + 1), (end_w - pos_w - 1), lub), lin));
+      }
+
+      return u3nc(u3qc_cut(3, pos_w, (end_w - pos_w), lub), lin);
+    }
+  }
+
+  u3_noun
+  u3we_lune(u3_noun cor)
+  {
+    u3_noun lub;
+
+    if ( (u3_none == (lub = u3r_at(u3x_sam, cor))) ||
+         (c3n == u3ud(lub)) )
+    {
+      return u3m_bail(c3__fail);
+    } else {
+      return u3qe_lune(lub);
+    }
+  }