1 files changed, 54 insertions, 0 deletions
diff --git a/vere/pkg/noun/jets/c/cat.c b/vere/pkg/noun/jets/c/cat.c
new file mode 100644
index 0000000..f3c4d2d
--- /dev/null
+++ b/vere/pkg/noun/jets/c/cat.c
@@ -0,0 +1,54 @@
+/// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+
+  u3_noun
+  u3qc_cat(u3_atom a,
+           u3_atom b,
+           u3_atom c)
+  {
+    if ( !_(u3a_is_cat(a)) || (a >= 32) ) {
+      return u3m_bail(c3__fail);
+    }
+    else {
+      c3_g   a_g = a;
+      c3_w   lew_w = u3r_met(a_g, b);
+      c3_w   ler_w = u3r_met(a_g, c);
+      c3_w   all_w = (lew_w + ler_w);
+
+      if ( 0 == all_w ) {
+        return 0;
+      }
+      else {
+        u3i_slab sab_u;
+        u3i_slab_from(&sab_u, b, a_g, all_w);
+
+        u3r_chop(a_g, 0, ler_w, lew_w, sab_u.buf_w, c);
+
+        return u3i_slab_mint(&sab_u);
+      }
+    }
+  }
+
+  u3_noun
+  u3wc_cat(u3_noun cor)
+  {
+    u3_noun a, b, c;
+
+    if ( (c3n == u3r_mean(cor, u3x_sam_2, &a,
+                                u3x_sam_6, &b,
+                                u3x_sam_7, &c, 0)) ||
+         (c3n == u3ud(a)) ||
+         (c3n == u3ud(b)) ||
+         (c3n == u3ud(c)) )
+    {
+      return u3m_bail(c3__exit);
+    } else {
+      return u3qc_cat(a, b, c);
+    }
+  }
+