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    <H1 CLASS="title">Function Template <CODE>copy</CODE></H1>
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  <DT><A href="#description">Description</A></DT>
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  <DT><A href="#synopsis">Synopsis</A></DT>
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<H2>Description</H2>

<P>The function template <CODE>copy</CODE> reads data from a given model of <A HREF="../concepts/source.html">Source</A> and writes it to a given model of <A HREF="../concepts/sink.html">Sink</A> until the end of stream is reached. It then closes both components, using the function template <A HREF="close.html"><CODE>close</CODE></A>, and returns the number of characters written.</P>

<P>The size of the temporary buffer used may be supplied as an optional parameter.</P>

<P>There are four overloads of <CODE>copy</CODE> to accommodate all combinations of <A HREF="../concepts/source.html">Sources</A> and <A HREF="../concepts/sink.html">Sinks</A>, which are passed by <CODE>const</CODE> reference, and streams and stream buffers, which are passed by non-<CODE>const</CODE> reference.</P>

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<H2>Headers</H2>

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  <DT><A CLASS="header" HREF="../../../../boost/iostreams/copy.hpp"><CODE>&lt;boost/iostreams/copy.hpp&gt;</CODE></A></DT>
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<A NAME="synopsis"></A>
<H2>Synopsis</H2>

<PRE CLASS="broken_ie"><SPAN CLASS="keyword">namespace</SPAN> boost { <SPAN CLASS="keyword">namespace</SPAN> iostreams {
              
<SPAN CLASS="keyword">template</SPAN>&lt;<SPAN CLASS="keyword">typename</SPAN> Source, <SPAN CLASS="keyword">typename</SPAN> Sink&gt;
std::streamsize
copy( [<SPAN CLASS="keyword">const</SPAN>] Source&amp; src, [<SPAN CLASS="keyword">const</SPAN>] Sink&amp; sink,
      std::streamsize buffer_size = <SPAN CLASS="omitted">default value</SPAN> );

} } <SPAN CLASS="comment">// End namespace boost::io</SPAN></PRE>


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    Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <A HREF="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>)
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