of Filters and Devices as the given chain.
</P>

<A NAME="read"></A>
<H4><CODE>chain::read</CODE></H4>

<PRE CLASS="broken_ie">    std::streamsize read(char_type* s, std::streamsize n);</PRE>

<P>
      Invokes <A HREF='../functions/read.html'><CODE>read</CODE></A> on the first filter or device in this chain, which must be non-empty.
</P>

<A NAME="write"></A>
<H4><CODE>chain::write</CODE></H4>

<PRE CLASS="broken_ie">    std::streamsize write(<SPAN CLASS='keyword'>const</SPAN> char_type* s, std::streamsize