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  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="boost_asio.reference.buffer_copy.overload2"></a><a class="link" href="overload2.html" title="buffer_copy (2 of 30 overloads)">buffer_copy
  28         (2 of 30 overloads)</a>
  29 </h4></div></div></div>
  30 <p>
  31           Copies bytes from a source buffer to a target buffer.
  32         </p>
  33 <pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">buffer_copy</span><span class="special">(</span>
  34     <span class="keyword">const</span> <span class="identifier">mutable_buffer</span> <span class="special">&amp;</span> <span class="identifier">target</span><span class="special">,</span>
  35     <span class="keyword">const</span> <span class="identifier">const_buffers_1</span> <span class="special">&amp;</span> <span class="identifier">source</span><span class="special">);</span>
  36 </pre>
  37 <h6>
  38 <a name="boost_asio.reference.buffer_copy.overload2.h0"></a>
  39           <span class="phrase"><a name="boost_asio.reference.buffer_copy.overload2.parameters"></a></span><a class="link" href="overload2.html#boost_asio.reference.buffer_copy.overload2.parameters">Parameters</a>
  40         </h6>
  41 <div class="variablelist">
  42 <p class="title"><b></b></p>
  43 <dl class="variablelist">
  44 <dt><span class="term">target</span></dt>
  45 <dd><p>
  46                 A modifiable buffer representing the memory region to which the bytes
  47                 will be copied.
  48               </p></dd>
  49 <dt><span class="term">source</span></dt>
  50 <dd><p>
  51                 A non-modifiable buffer representing the memory region from which
  52                 the bytes will be copied.
  53               </p></dd>
  54 </dl>
  55 </div>
  56 <h6>
  57 <a name="boost_asio.reference.buffer_copy.overload2.h1"></a>
  58           <span class="phrase"><a name="boost_asio.reference.buffer_copy.overload2.return_value"></a></span><a class="link" href="overload2.html#boost_asio.reference.buffer_copy.overload2.return_value">Return
  59           Value</a>
  60         </h6>
  61 <p>
  62           The number of bytes copied.
  63         </p>
  64 <h6>
  65 <a name="boost_asio.reference.buffer_copy.overload2.h2"></a>
  66           <span class="phrase"><a name="boost_asio.reference.buffer_copy.overload2.remarks"></a></span><a class="link" href="overload2.html#boost_asio.reference.buffer_copy.overload2.remarks">Remarks</a>
  67         </h6>
  68 <p>
  69           The number of bytes copied is the lesser of:
  70         </p>
  71 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  72 <li class="listitem">
  73               <code class="computeroutput"><span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">target</span><span class="special">)</span></code>
  74             </li>
  75 <li class="listitem">
  76               <code class="computeroutput"><span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">source</span><span class="special">)</span></code>
  77             </li>
  78 </ul></div>
  79 <p>
  80           This function is implemented in terms of <code class="computeroutput"><span class="identifier">memcpy</span></code>,
  81           and consequently it cannot be used to copy between overlapping memory regions.
  82         </p>
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  86 <td align="right"><div class="copyright-footer">Copyright &#169; 2003-2017 Christopher M. Kohlhoff<p>
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  88         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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