92 lines
5.4 KiB
HTML
92 lines
5.4 KiB
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>buffer_copy (1 of 2 overloads)</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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<link rel="home" href="../../../index.html" title="Asio">
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="../buffer_copy.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../buffer_copy.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../next.png" alt="Next"></a>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="asio.reference.buffer_copy.overload1"></a><a class="link" href="overload1.html" title="buffer_copy (1 of 2 overloads)">buffer_copy (1
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of 2 overloads)</a>
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</h4></div></div></div>
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<p>
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Copies bytes from a source buffer sequence to a target buffer sequence.
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</p>
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<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
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<span class="keyword">typename</span> <a class="link" href="../MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a><span class="special">,</span>
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<span class="keyword">typename</span> <a class="link" href="../ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a><span class="special">></span>
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<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>
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<span class="keyword">const</span> <span class="identifier">MutableBufferSequence</span> <span class="special">&</span> <span class="identifier">target</span><span class="special">,</span>
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<span class="keyword">const</span> <span class="identifier">ConstBufferSequence</span> <span class="special">&</span> <span class="identifier">source</span><span class="special">);</span>
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</pre>
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<h6>
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<a name="asio.reference.buffer_copy.overload1.h0"></a>
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<span><a name="asio.reference.buffer_copy.overload1.parameters"></a></span><a class="link" href="overload1.html#asio.reference.buffer_copy.overload1.parameters">Parameters</a>
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</h6>
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<div class="variablelist">
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<p class="title"><b></b></p>
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<dl>
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<dt><span class="term">target</span></dt>
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<dd><p>
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A modifiable buffer sequence representing the memory regions to which
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the bytes will be copied.
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</p></dd>
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<dt><span class="term">source</span></dt>
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<dd><p>
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A non-modifiable buffer sequence representing the memory regions
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from which the bytes will be copied.
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</p></dd>
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</dl>
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</div>
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<h6>
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<a name="asio.reference.buffer_copy.overload1.h1"></a>
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<span><a name="asio.reference.buffer_copy.overload1.return_value"></a></span><a class="link" href="overload1.html#asio.reference.buffer_copy.overload1.return_value">Return
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Value</a>
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</h6>
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<p>
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The number of bytes copied.
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</p>
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<h6>
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<a name="asio.reference.buffer_copy.overload1.h2"></a>
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<span><a name="asio.reference.buffer_copy.overload1.remarks"></a></span><a class="link" href="overload1.html#asio.reference.buffer_copy.overload1.remarks">Remarks</a>
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</h6>
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<p>
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The number of bytes copied is the lesser of:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem">
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<code class="computeroutput"><span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">target</span><span class="special">)</span></code>
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</li>
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<li class="listitem">
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<code class="computeroutput"><span class="identifier">buffer_size</span><span class="special">(</span><span class="identifier">source</span><span class="special">)</span></code>
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</li>
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</ul></div>
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<p>
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This function is implemented in terms of <code class="computeroutput"><span class="identifier">memcpy</span></code>,
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and consequently it cannot be used to copy between overlapping memory regions.
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</p>
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</div>
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<div class="copyright-footer">Copyright © 2003-2023 Christopher M. Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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</p>
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</div>
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<hr>
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<div class="spirit-nav">
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