1 files changed, 49 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/b/turn.c b/vere/pkg/noun/jets/b/turn.c
new file mode 100644
index 0000000..e5ee5f7
--- /dev/null
+++ b/vere/pkg/noun/jets/b/turn.c
@@ -0,0 +1,49 @@
+/// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+u3_noun
+u3qb_turn(u3_noun a, u3_noun b)
+{
+  u3_noun  pro;
+  u3_noun* lit = &pro;
+
+  if ( u3_nul != a ) {
+    u3_noun*   hed;
+    u3_noun*   tel;
+    u3_noun   i, t;
+    u3j_site sit_u;
+
+    u3j_gate_prep(&sit_u, u3k(b));
+    u3k(a);
+
+    do {
+      i = u3h(a);
+
+      *lit = u3i_defcons(&hed, &tel);
+      *hed = u3j_gate_slam(&sit_u, u3k(i));
+      lit  = tel;
+
+      t = u3k(u3t(a));
+      u3z(a), a = t;
+    }
+    while ( u3_nul != a );
+
+    u3j_gate_lose(&sit_u);
+  }
+
+  *lit = u3_nul;
+
+  return pro;
+}
+
+u3_noun
+u3wb_turn(u3_noun cor)
+{
+  u3_noun a, b;
+  u3x_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0);
+  return u3qb_turn(a, b);
+}