From fcedfddf00b3f994e4f4e40332ac7fc192c63244 Mon Sep 17 00:00:00 2001
From: polwex <polwex@sortug.com>
Date: Sun, 5 Oct 2025 21:56:51 +0700
Subject: claude is gud

---
 vere/pkg/noun/jets/c/can.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 vere/pkg/noun/jets/c/can.c

(limited to 'vere/pkg/noun/jets/c/can.c')

diff --git a/vere/pkg/noun/jets/c/can.c b/vere/pkg/noun/jets/c/can.c
new file mode 100644
index 0000000..ca6d97a
--- /dev/null
+++ b/vere/pkg/noun/jets/c/can.c
@@ -0,0 +1,85 @@
+/// @file
+
+#include "jets/q.h"
+#include "jets/w.h"
+
+#include "noun.h"
+
+
+  u3_noun
+  u3qc_can(u3_atom a,
+           u3_noun b)
+  {
+    if ( !_(u3a_is_cat(a)) || (a >= 32) ) {
+      return u3m_bail(c3__fail);
+    }
+    else {
+      c3_g       a_g = a;
+      c3_w     tot_w = 0;
+      u3i_slab sab_u;
+
+      /* Measure and validate the slab required.
+      */
+      {
+        u3_noun cab = b;
+
+        while ( 1 ) {
+          u3_noun i_cab, pi_cab, qi_cab;
+
+          if ( 0 == cab ) {
+            break;
+          }
+          if ( c3n == u3du(cab) ) return u3m_bail(c3__fail);
+          i_cab = u3h(cab);
+          if ( c3n == u3du(i_cab) ) return u3m_bail(c3__fail);
+          pi_cab = u3h(i_cab);
+          qi_cab = u3t(i_cab);
+          if ( c3n == u3a_is_cat(pi_cab) ) return u3m_bail(c3__fail);
+          if ( c3n == u3ud(qi_cab) )  return u3m_bail(c3__fail);
+          if ( (tot_w + pi_cab) < tot_w ) return u3m_bail(c3__fail);
+
+          tot_w += pi_cab;
+          cab = u3t(cab);
+        }
+
+        if ( 0 == tot_w ) {
+          return 0;
+        }
+
+        u3i_slab_init(&sab_u, a_g, tot_w);
+      }
+
+      /* Chop the list atoms in.
+      */
+      {
+        u3_noun cab = b;
+        c3_w    pos_w = 0;
+
+        while ( 0 != cab ) {
+          u3_noun i_cab = u3h(cab);
+          u3_atom pi_cab = u3h(i_cab);
+          u3_atom qi_cab = u3t(i_cab);
+
+          u3r_chop(a_g, 0, pi_cab, pos_w, sab_u.buf_w, qi_cab);
+          pos_w += pi_cab;
+          cab = u3t(cab);
+        }
+      }
+
+      return u3i_slab_mint(&sab_u);
+    }
+  }
+  u3_noun
+  u3wc_can(u3_noun cor)
+  {
+    u3_noun a, b;
+
+    if ( (c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0)) ||
+         (c3n == u3ud(a)) )
+    {
+      return u3m_bail(c3__fail);
+    } else {
+      return u3qc_can(a, b);
+    }
+  }
+
-- 
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