yn-coresym">ffi/lookup</span> <span class="mdzsyn-symbol">self-symbols</span> <span class="mdzsyn-string">"memcpy"</span>))
(<span class="mdzsyn-coresym">def</span> <span class="mdzsyn-symbol">signature</span> (<span class="mdzsyn-coresym">ffi/signature</span> <span class="mdzsyn-keyword">:ptr</span> <span class="mdzsyn-keyword">:ptr</span> <span class="mdzsyn-keyword">:ptr</span> <span class="mdzsyn-keyword">:size</span>))

<span class="mdzsyn-comment"># Example usage of our memcpy binding</span>
(<span cl