working

1 files changed, 46 insertions, 0 deletions

diff --git a/vere/pkg/noun/jets/c/swp.c b/vere/pkg/noun/jets/c/swp.c
new file mode 100644
index 0000000..1d0a11b
--- /dev/null
+++ b/vere/pkg/noun/jets/c/swp.c
@@ -0,0 +1,46 @@
+/// @file
+
+#include "jets/k.h"
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+u3_noun
+u3qc_swp(u3_atom a,
+         u3_atom b)
+{
+  c3_w len_w = u3r_met(a, b);
+  u3i_slab sab_u;
+  u3i_slab_init(&sab_u, a, len_w);
+
+  for (c3_w i = 0; i < len_w; i++) {
+    u3r_chop(a, i, 1, len_w - i - 1, sab_u.buf_w, b);
+  }
+         
+  return u3i_slab_mint(&sab_u);
+}
+
+u3_noun
+u3wc_swp(u3_noun cor)
+{
+  u3_noun a, b;
+  u3x_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0);
+
+  if (  (c3n == u3ud(a))
+     || (c3n == u3ud(b)) )
+  {
+    return u3m_bail(c3__exit);
+  }
+
+  return u3qc_swp(a, b);
+ }
+
+u3_noun
+u3kc_swp(u3_atom a,
+         u3_atom b)
+{
+  u3_noun pro = u3qc_swp(a, b);
+  u3z(a); u3z(b);
+  return pro;
+}