121 lines
7.9 KiB
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121 lines
7.9 KiB
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<title>write (2 of 16 overloads)</title>
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<link rel="up" href="../write.html" title="write">
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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="overload1.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../write.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="overload3.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.write.overload2"></a><a class="link" href="overload2.html" title="write (2 of 16 overloads)">write (2 of 16 overloads)</a>
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</h4></div></div></div>
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<p>
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Write all of the supplied data to a stream before returning.
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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="../SyncWriteStream.html" title="Buffer-oriented synchronous write stream requirements">SyncWriteStream</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">write</span><span class="special">(</span>
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<span class="identifier">SyncWriteStream</span> <span class="special">&</span> <span class="identifier">s</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">buffers</span><span class="special">,</span>
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<span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&</span> <span class="identifier">ec</span><span class="special">,</span>
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<span class="keyword">typename</span> <span class="identifier">constraint</span><span class="special"><</span> <span class="identifier">is_const_buffer_sequence</span><span class="special"><</span> <span class="identifier">ConstBufferSequence</span> <span class="special">>::</span><span class="identifier">value</span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">=</span> <span class="number">0</span><span class="special">);</span>
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</pre>
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<p>
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This function is used to write a certain number of bytes of data to a stream.
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The call will block until one of the following conditions is true:
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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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All of the data in the supplied buffers has been written. That is,
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the bytes transferred is equal to the sum of the buffer sizes.
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</li>
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<li class="listitem">
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An error occurred.
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</li>
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</ul></div>
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<p>
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This operation is implemented in terms of zero or more calls to the stream's
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write_some function.
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</p>
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<h6>
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<a name="asio.reference.write.overload2.h0"></a>
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<span><a name="asio.reference.write.overload2.parameters"></a></span><a class="link" href="overload2.html#asio.reference.write.overload2.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">s</span></dt>
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<dd><p>
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The stream to which the data is to be written. The type must support
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the SyncWriteStream concept.
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</p></dd>
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<dt><span class="term">buffers</span></dt>
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<dd><p>
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One or more buffers containing the data to be written. The sum of
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the buffer sizes indicates the maximum number of bytes to write to
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the stream.
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</p></dd>
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<dt><span class="term">ec</span></dt>
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<dd><p>
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Set to indicate what error occurred, if any.
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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.write.overload2.h1"></a>
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<span><a name="asio.reference.write.overload2.return_value"></a></span><a class="link" href="overload2.html#asio.reference.write.overload2.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 transferred.
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</p>
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<h6>
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<a name="asio.reference.write.overload2.h2"></a>
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<span><a name="asio.reference.write.overload2.example"></a></span><a class="link" href="overload2.html#asio.reference.write.overload2.example">Example</a>
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</h6>
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<p>
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To write a single data buffer use the <a class="link" href="../buffer.html" title="buffer"><code class="computeroutput"><span class="identifier">buffer</span></code></a> function as follows:
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</p>
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<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">write</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">(</span><span class="identifier">data</span><span class="special">,</span> <span class="identifier">size</span><span class="special">),</span> <span class="identifier">ec</span><span class="special">);</span>
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</pre>
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<p>
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See the <a class="link" href="../buffer.html" title="buffer"><code class="computeroutput"><span class="identifier">buffer</span></code></a>
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documentation for information on writing multiple buffers in one go, and
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how to use it with arrays, boost::array or std::vector.
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</p>
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<h6>
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<a name="asio.reference.write.overload2.h3"></a>
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<span><a name="asio.reference.write.overload2.remarks"></a></span><a class="link" href="overload2.html#asio.reference.write.overload2.remarks">Remarks</a>
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</h6>
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<p>
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This overload is equivalent to calling:
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</p>
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<pre class="programlisting"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">write</span><span class="special">(</span>
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<span class="identifier">s</span><span class="special">,</span> <span class="identifier">buffers</span><span class="special">,</span>
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<span class="identifier">asio</span><span class="special">::</span><span class="identifier">transfer_all</span><span class="special">(),</span> <span class="identifier">ec</span><span class="special">);</span>
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</pre>
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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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<a accesskey="p" href="overload1.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../write.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="overload3.html"><img src="../../../next.png" alt="Next"></a>
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</div>
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</body>
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</html>
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