tt>.
</p>
<p>
In the second syntax, the source of the copy must be a Lua string. All
bytes of the string <em>plus a zero-terminator</em> are copied to
<tt>dst</tt> (i.e. <tt>#src+1</tt> bytes).
</p>
<p>
Performance notice: <tt>ffi.copy()</tt> may be used as a faster
(inlinable) replacement for the C&nbsp;library functions
<tt>memcpy()</tt>, <tt>strcpy()</tt> and <tt>strncpy()</tt>.
</p>

<h3 id="ffi_fill"><tt>ffi.fill(dst, len [,c])</tt></h3>
<p>
Fills the data pointed to by <tt>dst</tt> with <tt>len</tt> c