Adds asio library and Storage Module
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<title>async_read_until (1 of 12 overloads)</title>
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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="../async_read_until.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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.async_read_until.overload1"></a><a class="link" href="overload1.html" title="async_read_until (1 of 12 overloads)">async_read_until
|
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(1 of 12 overloads)</a>
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</h4></div></div></div>
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<p>
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Start an asynchronous operation to read data into a dynamic buffer sequence
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until it contains a specified delimiter.
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</p>
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<pre class="programlisting">template<
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typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
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typename <a class="link" href="../DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a>,
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typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
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AsyncReadStream & s,
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DynamicBuffer_v1 && buffers,
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char delim,
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ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
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typename enable_if< is_dynamic_buffer_v1< typename decay< DynamicBuffer_v1 >::type >::value &&!is_dynamic_buffer_v2< typename decay< DynamicBuffer_v1 >::type >::value >::type * = 0);
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</pre>
|
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<p>
|
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This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until the dynamic buffer sequence's get area contains the
|
||||
specified delimiter. The function call always returns immediately. The
|
||||
asynchronous operation will continue until one of the following conditions
|
||||
is true:
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||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The get area of the dynamic buffer sequence contains the specified
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delimiter.
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</li>
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||||
<li class="listitem">
|
||||
An error occurred.
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||||
</li>
|
||||
</ul></div>
|
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<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the dynamic buffer sequence's get area already contains the delimiter,
|
||||
this asynchronous operation completes immediately. The program must ensure
|
||||
that the stream performs no other read operations (such as async_read,
|
||||
async_read_until, the stream's async_read_some function, or any other composed
|
||||
operations that perform reads) until this operation completes.
|
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</p>
|
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<h6>
|
||||
<a name="asio.reference.async_read_until.overload1.h0"></a>
|
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<span><a name="asio.reference.async_read_until.overload1.parameters"></a></span><a class="link" href="overload1.html#asio.reference.async_read_until.overload1.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
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<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
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the AsyncReadStream 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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The dynamic buffer sequence into which the data will be read. Although
|
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the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
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</p></dd>
|
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<dt><span class="term">delim</span></dt>
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<dd><p>
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The delimiter character.
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</p></dd>
|
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<dt><span class="term">handler</span></dt>
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<dd>
|
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<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
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<pre class="programlisting">void handler(
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// Result of operation.
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const asio::error_code& error,
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// The number of bytes in the dynamic buffer sequence's
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// get area up to and including the delimiter.
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// 0 if an error occurred.
|
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std::size_t bytes_transferred
|
||||
);
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</pre>
|
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<p>
|
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Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
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On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
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</p>
|
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</dd>
|
||||
</dl>
|
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</div>
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<h6>
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<a name="asio.reference.async_read_until.overload1.h1"></a>
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<span><a name="asio.reference.async_read_until.overload1.remarks"></a></span><a class="link" href="overload1.html#asio.reference.async_read_until.overload1.remarks">Remarks</a>
|
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</h6>
|
||||
<p>
|
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After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond the delimiter. An application will typically
|
||||
leave that data in the dynamic buffer sequence for a subsequent async_read_until
|
||||
operation to examine.
|
||||
</p>
|
||||
<h6>
|
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<a name="asio.reference.async_read_until.overload1.h2"></a>
|
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<span><a name="asio.reference.async_read_until.overload1.example"></a></span><a class="link" href="overload1.html#asio.reference.async_read_until.overload1.example">Example</a>
|
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</h6>
|
||||
<p>
|
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To asynchronously read data into a <code class="computeroutput">std::string</code> until a newline
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is encountered:
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</p>
|
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<pre class="programlisting">std::string data;
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...
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void handler(const asio::error_code& e, std::size_t size)
|
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{
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||||
if (!e)
|
||||
{
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std::string line = data.substr(0, n);
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data.erase(0, n);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
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||||
asio::async_read_until(s, data, '\n', handler);
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||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the buffer <code class="computeroutput">data</code> contains the delimiter:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">substr</code> then extracts the data up to and including
|
||||
the delimiter, so that the string <code class="computeroutput">line</code> contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\n' }
|
||||
</pre>
|
||||
<p>
|
||||
After the call to <code class="computeroutput">erase</code>, the remaining data is left in the
|
||||
buffer <code class="computeroutput">data</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
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<div class="spirit-nav">
|
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<a accesskey="p" href="../async_read_until.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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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@@ -0,0 +1,181 @@
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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>async_read_until (10 of 12 overloads)</title>
|
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<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
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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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<link rel="up" href="../async_read_until.html" title="async_read_until">
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<link rel="prev" href="overload9.html" title="async_read_until (9 of 12 overloads)">
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<link rel="next" href="overload11.html" title="async_read_until (11 of 12 overloads)">
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</head>
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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="overload9.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload11.html"><img src="../../../next.png" alt="Next"></a>
|
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</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload10"></a><a class="link" href="overload10.html" title="async_read_until (10 of 12 overloads)">async_read_until
|
||||
(10 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until it contains a specified delimiter.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a>,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
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AsyncReadStream & s,
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DynamicBuffer_v2 buffers,
|
||||
string_view delim,
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||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_dynamic_buffer_v2< DynamicBuffer_v2 >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until the dynamic buffer sequence's get area contains the
|
||||
specified delimiter. The function call always returns immediately. The
|
||||
asynchronous operation will continue until one of the following conditions
|
||||
is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The get area of the dynamic buffer sequence contains the specified
|
||||
delimiter.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the dynamic buffer sequence's get area already contains the delimiter,
|
||||
this asynchronous operation completes immediately. The program must ensure
|
||||
that the stream performs no other read operations (such as async_read,
|
||||
async_read_until, the stream's async_read_some function, or any other composed
|
||||
operations that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload10.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload10.parameters"></a></span><a class="link" href="overload10.html#asio.reference.async_read_until.overload10.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">delim</span></dt>
|
||||
<dd><p>
|
||||
The delimiter string.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer sequence's
|
||||
// get area up to and including the delimiter.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload10.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload10.remarks"></a></span><a class="link" href="overload10.html#asio.reference.async_read_until.overload10.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond the delimiter. An application will typically
|
||||
leave that data in the dynamic buffer sequence for a subsequent async_read_until
|
||||
operation to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload10.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload10.example"></a></span><a class="link" href="overload10.html#asio.reference.async_read_until.overload10.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a CR-LF
|
||||
sequence is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">std::string data;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::string line = data.substr(0, n);
|
||||
data.erase(0, n);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, data, "\r\n", handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the string <code class="computeroutput">data</code> contains the delimiter:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">substr</code> then extracts the data up to and including
|
||||
the delimiter, so that the string <code class="computeroutput">line</code> contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n' }
|
||||
</pre>
|
||||
<p>
|
||||
After the call to <code class="computeroutput">erase</code>, the remaining data is left in the
|
||||
string <code class="computeroutput">data</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload9.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload11.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
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<a accesskey="p" href="overload10.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload12.html"><img src="../../../next.png" alt="Next"></a>
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</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload11"></a><a class="link" href="overload11.html" title="async_read_until (11 of 12 overloads)">async_read_until
|
||||
(11 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until some part of its data matches a regular expression.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a>,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
DynamicBuffer_v2 buffers,
|
||||
const boost::regex & expr,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_dynamic_buffer_v2< DynamicBuffer_v2 >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until the dynamic buffer sequence's get area contains some
|
||||
data that matches a regular expression. The function call always returns
|
||||
immediately. The asynchronous operation will continue until one of the
|
||||
following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
A substring of the dynamic buffer sequence's get area matches the regular
|
||||
expression.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the dynamic buffer sequence's get area already contains data that matches
|
||||
the regular expression, this asynchronous operation completes immediately.
|
||||
The program must ensure that the stream performs no other read operations
|
||||
(such as async_read, async_read_until, the stream's async_read_some function,
|
||||
or any other composed operations that perform reads) until this operation
|
||||
completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload11.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload11.parameters"></a></span><a class="link" href="overload11.html#asio.reference.async_read_until.overload11.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">expr</span></dt>
|
||||
<dd><p>
|
||||
The regular expression.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer
|
||||
// sequence's get area up to and including the
|
||||
// substring that matches the regular expression.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload11.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload11.remarks"></a></span><a class="link" href="overload11.html#asio.reference.async_read_until.overload11.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond that which matched the regular expression.
|
||||
An application will typically leave that data in the dynamic buffer sequence
|
||||
for a subsequent async_read_until operation to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload11.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload11.example"></a></span><a class="link" href="overload11.html#asio.reference.async_read_until.overload11.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a CR-LF
|
||||
sequence is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">std::string data;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::string line = data.substr(0, n);
|
||||
data.erase(0, n);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, data,
|
||||
boost::regex("\r\n"), handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the string <code class="computeroutput">data</code> contains the data which matched the regular
|
||||
expression:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">substr</code> then extracts the data up to and including
|
||||
the match, so that the string <code class="computeroutput">line</code> contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n' }
|
||||
</pre>
|
||||
<p>
|
||||
After the call to <code class="computeroutput">erase</code>, the remaining data is left in the
|
||||
string <code class="computeroutput">data</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload10.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload12.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,224 @@
|
||||
<html>
|
||||
<head>
|
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
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<title>async_read_until (12 of 12 overloads)</title>
|
||||
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
|
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|
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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="overload11.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="../async_result.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload12"></a><a class="link" href="overload12.html" title="async_read_until (12 of 12 overloads)">async_read_until
|
||||
(12 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until a function object indicates a match.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a>,
|
||||
typename MatchCondition,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
DynamicBuffer_v2 buffers,
|
||||
MatchCondition match_condition,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_match_condition< MatchCondition >::value &&is_dynamic_buffer_v2< DynamicBuffer_v2 >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until a user-defined match condition function object, when
|
||||
applied to the data contained in the dynamic buffer sequence, indicates
|
||||
a successful match. The function call always returns immediately. The asynchronous
|
||||
operation will continue until one of the following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The match condition function object returns a std::pair where the second
|
||||
element evaluates to true.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the match condition function object already indicates a match, this
|
||||
asynchronous operation completes immediately. The program must ensure that
|
||||
the stream performs no other read operations (such as async_read, async_read_until,
|
||||
the stream's async_read_some function, or any other composed operations
|
||||
that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload12.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload12.parameters"></a></span><a class="link" href="overload12.html#asio.reference.async_read_until.overload12.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">match_condition</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The function object to be called to determine whether a match exists.
|
||||
The signature of the function object must be:
|
||||
</p>
|
||||
<pre class="programlisting">pair<iterator, bool> match_condition(iterator begin, iterator end);
|
||||
</pre>
|
||||
<p>
|
||||
where <code class="computeroutput">iterator</code> represents the type:
|
||||
</p>
|
||||
<pre class="programlisting">buffers_iterator<typename DynamicBuffer_v2::const_buffers_type>
|
||||
</pre>
|
||||
<p>
|
||||
The iterator parameters <code class="computeroutput">begin</code> and <code class="computeroutput">end</code> define
|
||||
the range of bytes to be scanned to determine whether there is a
|
||||
match. The <code class="computeroutput">first</code> member of the return value is an iterator
|
||||
marking one-past-the-end of the bytes that have been consumed by
|
||||
the match function. This iterator is used to calculate the <code class="computeroutput">begin</code>
|
||||
parameter for any subsequent invocation of the match condition. The
|
||||
<code class="computeroutput">second</code> member of the return value is true if a match
|
||||
has been found, false otherwise.
|
||||
</p>
|
||||
</dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer sequence's
|
||||
// get area that have been fully consumed by the match
|
||||
// function. O if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload12.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload12.remarks"></a></span><a class="link" href="overload12.html#asio.reference.async_read_until.overload12.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond that which matched the function object.
|
||||
An application will typically leave that data in the dynamic buffer sequence
|
||||
for a subsequent async_read_until operation to examine.
|
||||
</p>
|
||||
<p>
|
||||
The default implementation of the <code class="computeroutput">is_match_condition</code> type
|
||||
trait evaluates to true for function pointers and function objects with
|
||||
a <code class="computeroutput">result_type</code> typedef. It must be specialised for other user-defined
|
||||
function objects.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload12.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload12.examples"></a></span><a class="link" href="overload12.html#asio.reference.async_read_until.overload12.examples">Examples</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until whitespace
|
||||
is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">typedef asio::buffers_iterator<
|
||||
asio::const_buffers_1> iterator;
|
||||
|
||||
std::pair<iterator, bool>
|
||||
match_whitespace(iterator begin, iterator end)
|
||||
{
|
||||
iterator i = begin;
|
||||
while (i != end)
|
||||
if (std::isspace(*i++))
|
||||
return std::make_pair(i, true);
|
||||
return std::make_pair(i, false);
|
||||
}
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size);
|
||||
...
|
||||
std::string data;
|
||||
asio::async_read_until(s, data, match_whitespace, handler);
|
||||
</pre>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a matching
|
||||
character is found:
|
||||
</p>
|
||||
<pre class="programlisting">class match_char
|
||||
{
|
||||
public:
|
||||
explicit match_char(char c) : c_(c) {}
|
||||
|
||||
template <typename Iterator>
|
||||
std::pair<Iterator, bool> operator()(
|
||||
Iterator begin, Iterator end) const
|
||||
{
|
||||
Iterator i = begin;
|
||||
while (i != end)
|
||||
if (c_ == *i++)
|
||||
return std::make_pair(i, true);
|
||||
return std::make_pair(i, false);
|
||||
}
|
||||
|
||||
private:
|
||||
char c_;
|
||||
};
|
||||
|
||||
namespace asio {
|
||||
template <> struct is_match_condition<match_char>
|
||||
: public boost::true_type {};
|
||||
} // namespace asio
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size);
|
||||
...
|
||||
std::string data;
|
||||
asio::async_read_until(s, data, match_char('a'), handler);
|
||||
</pre>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload11.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="../async_result.html"><img src="../../../next.png" alt="Next"></a>
|
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|
||||
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|
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|
||||
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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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<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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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="overload1.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload2"></a><a class="link" href="overload2.html" title="async_read_until (2 of 12 overloads)">async_read_until
|
||||
(2 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until it contains a specified delimiter.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a>,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
DynamicBuffer_v1 && buffers,
|
||||
string_view delim,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_dynamic_buffer_v1< typename decay< DynamicBuffer_v1 >::type >::value &&!is_dynamic_buffer_v2< typename decay< DynamicBuffer_v1 >::type >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until the dynamic buffer sequence's get area contains the
|
||||
specified delimiter. The function call always returns immediately. The
|
||||
asynchronous operation will continue until one of the following conditions
|
||||
is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The get area of the dynamic buffer sequence contains the specified
|
||||
delimiter.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the dynamic buffer sequence's get area already contains the delimiter,
|
||||
this asynchronous operation completes immediately. The program must ensure
|
||||
that the stream performs no other read operations (such as async_read,
|
||||
async_read_until, the stream's async_read_some function, or any other composed
|
||||
operations that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload2.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload2.parameters"></a></span><a class="link" href="overload2.html#asio.reference.async_read_until.overload2.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">delim</span></dt>
|
||||
<dd><p>
|
||||
The delimiter string.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer sequence's
|
||||
// get area up to and including the delimiter.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload2.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload2.remarks"></a></span><a class="link" href="overload2.html#asio.reference.async_read_until.overload2.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond the delimiter. An application will typically
|
||||
leave that data in the dynamic buffer sequence for a subsequent async_read_until
|
||||
operation to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload2.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload2.example"></a></span><a class="link" href="overload2.html#asio.reference.async_read_until.overload2.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a CR-LF
|
||||
sequence is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">std::string data;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::string line = data.substr(0, n);
|
||||
data.erase(0, n);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, data, "\r\n", handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the string <code class="computeroutput">data</code> contains the delimiter:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">substr</code> then extracts the data up to and including
|
||||
the delimiter, so that the string <code class="computeroutput">line</code> contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n' }
|
||||
</pre>
|
||||
<p>
|
||||
After the call to <code class="computeroutput">erase</code>, the remaining data is left in the
|
||||
string <code class="computeroutput">data</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload1.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,185 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
||||
<title>async_read_until (3 of 12 overloads)</title>
|
||||
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
||||
<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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<link rel="up" href="../async_read_until.html" title="async_read_until">
|
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<link rel="prev" href="overload2.html" title="async_read_until (2 of 12 overloads)">
|
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<link rel="next" href="overload4.html" title="async_read_until (4 of 12 overloads)">
|
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</head>
|
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload2.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload4.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload3"></a><a class="link" href="overload3.html" title="async_read_until (3 of 12 overloads)">async_read_until
|
||||
(3 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until some part of its data matches a regular expression.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a>,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
DynamicBuffer_v1 && buffers,
|
||||
const boost::regex & expr,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_dynamic_buffer_v1< typename decay< DynamicBuffer_v1 >::type >::value &&!is_dynamic_buffer_v2< typename decay< DynamicBuffer_v1 >::type >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until the dynamic buffer sequence's get area contains some
|
||||
data that matches a regular expression. The function call always returns
|
||||
immediately. The asynchronous operation will continue until one of the
|
||||
following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
A substring of the dynamic buffer sequence's get area matches the regular
|
||||
expression.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the dynamic buffer sequence's get area already contains data that matches
|
||||
the regular expression, this asynchronous operation completes immediately.
|
||||
The program must ensure that the stream performs no other read operations
|
||||
(such as async_read, async_read_until, the stream's async_read_some function,
|
||||
or any other composed operations that perform reads) until this operation
|
||||
completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload3.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload3.parameters"></a></span><a class="link" href="overload3.html#asio.reference.async_read_until.overload3.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">expr</span></dt>
|
||||
<dd><p>
|
||||
The regular expression.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer
|
||||
// sequence's get area up to and including the
|
||||
// substring that matches the regular expression.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload3.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload3.remarks"></a></span><a class="link" href="overload3.html#asio.reference.async_read_until.overload3.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond that which matched the regular expression.
|
||||
An application will typically leave that data in the dynamic buffer sequence
|
||||
for a subsequent async_read_until operation to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload3.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload3.example"></a></span><a class="link" href="overload3.html#asio.reference.async_read_until.overload3.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a CR-LF
|
||||
sequence is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">std::string data;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::string line = data.substr(0, n);
|
||||
data.erase(0, n);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, data,
|
||||
boost::regex("\r\n"), handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the string <code class="computeroutput">data</code> contains the data which matched the regular
|
||||
expression:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">substr</code> then extracts the data up to and including
|
||||
the match, so that the string <code class="computeroutput">line</code> contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n' }
|
||||
</pre>
|
||||
<p>
|
||||
After the call to <code class="computeroutput">erase</code>, the remaining data is left in the
|
||||
string <code class="computeroutput">data</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload2.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload4.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,224 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>async_read_until (4 of 12 overloads)</title>
|
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<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
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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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<link rel="up" href="../async_read_until.html" title="async_read_until">
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<link rel="prev" href="overload3.html" title="async_read_until (3 of 12 overloads)">
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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="overload3.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload5.html"><img src="../../../next.png" alt="Next"></a>
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||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload4"></a><a class="link" href="overload4.html" title="async_read_until (4 of 12 overloads)">async_read_until
|
||||
(4 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until a function object indicates a match.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v1.html" title="Dynamic buffer requirements (version 1)">DynamicBuffer_v1</a>,
|
||||
typename MatchCondition,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
DynamicBuffer_v1 && buffers,
|
||||
MatchCondition match_condition,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_match_condition< MatchCondition >::value &&is_dynamic_buffer_v1< typename decay< DynamicBuffer_v1 >::type >::value &&!is_dynamic_buffer_v2< typename decay< DynamicBuffer_v1 >::type >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until a user-defined match condition function object, when
|
||||
applied to the data contained in the dynamic buffer sequence, indicates
|
||||
a successful match. The function call always returns immediately. The asynchronous
|
||||
operation will continue until one of the following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The match condition function object returns a std::pair where the second
|
||||
element evaluates to true.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the match condition function object already indicates a match, this
|
||||
asynchronous operation completes immediately. The program must ensure that
|
||||
the stream performs no other read operations (such as async_read, async_read_until,
|
||||
the stream's async_read_some function, or any other composed operations
|
||||
that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload4.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload4.parameters"></a></span><a class="link" href="overload4.html#asio.reference.async_read_until.overload4.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">match_condition</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The function object to be called to determine whether a match exists.
|
||||
The signature of the function object must be:
|
||||
</p>
|
||||
<pre class="programlisting">pair<iterator, bool> match_condition(iterator begin, iterator end);
|
||||
</pre>
|
||||
<p>
|
||||
where <code class="computeroutput">iterator</code> represents the type:
|
||||
</p>
|
||||
<pre class="programlisting">buffers_iterator<typename DynamicBuffer_v1::const_buffers_type>
|
||||
</pre>
|
||||
<p>
|
||||
The iterator parameters <code class="computeroutput">begin</code> and <code class="computeroutput">end</code> define
|
||||
the range of bytes to be scanned to determine whether there is a
|
||||
match. The <code class="computeroutput">first</code> member of the return value is an iterator
|
||||
marking one-past-the-end of the bytes that have been consumed by
|
||||
the match function. This iterator is used to calculate the <code class="computeroutput">begin</code>
|
||||
parameter for any subsequent invocation of the match condition. The
|
||||
<code class="computeroutput">second</code> member of the return value is true if a match
|
||||
has been found, false otherwise.
|
||||
</p>
|
||||
</dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer sequence's
|
||||
// get area that have been fully consumed by the match
|
||||
// function. O if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload4.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload4.remarks"></a></span><a class="link" href="overload4.html#asio.reference.async_read_until.overload4.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond that which matched the function object.
|
||||
An application will typically leave that data in the dynamic buffer sequence
|
||||
for a subsequent async_read_until operation to examine.
|
||||
</p>
|
||||
<p>
|
||||
The default implementation of the <code class="computeroutput">is_match_condition</code> type
|
||||
trait evaluates to true for function pointers and function objects with
|
||||
a <code class="computeroutput">result_type</code> typedef. It must be specialised for other user-defined
|
||||
function objects.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload4.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload4.examples"></a></span><a class="link" href="overload4.html#asio.reference.async_read_until.overload4.examples">Examples</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until whitespace
|
||||
is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">typedef asio::buffers_iterator<
|
||||
asio::const_buffers_1> iterator;
|
||||
|
||||
std::pair<iterator, bool>
|
||||
match_whitespace(iterator begin, iterator end)
|
||||
{
|
||||
iterator i = begin;
|
||||
while (i != end)
|
||||
if (std::isspace(*i++))
|
||||
return std::make_pair(i, true);
|
||||
return std::make_pair(i, false);
|
||||
}
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size);
|
||||
...
|
||||
std::string data;
|
||||
asio::async_read_until(s, data, match_whitespace, handler);
|
||||
</pre>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a matching
|
||||
character is found:
|
||||
</p>
|
||||
<pre class="programlisting">class match_char
|
||||
{
|
||||
public:
|
||||
explicit match_char(char c) : c_(c) {}
|
||||
|
||||
template <typename Iterator>
|
||||
std::pair<Iterator, bool> operator()(
|
||||
Iterator begin, Iterator end) const
|
||||
{
|
||||
Iterator i = begin;
|
||||
while (i != end)
|
||||
if (c_ == *i++)
|
||||
return std::make_pair(i, true);
|
||||
return std::make_pair(i, false);
|
||||
}
|
||||
|
||||
private:
|
||||
char c_;
|
||||
};
|
||||
|
||||
namespace asio {
|
||||
template <> struct is_match_condition<match_char>
|
||||
: public boost::true_type {};
|
||||
} // namespace asio
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size);
|
||||
...
|
||||
std::string data;
|
||||
asio::async_read_until(s, data, match_char('a'), handler);
|
||||
</pre>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload3.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload5.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,177 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
||||
<title>async_read_until (5 of 12 overloads)</title>
|
||||
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
|
||||
<link rel="home" href="../../../index.html" title="Asio">
|
||||
<link rel="up" href="../async_read_until.html" title="async_read_until">
|
||||
<link rel="prev" href="overload4.html" title="async_read_until (4 of 12 overloads)">
|
||||
<link rel="next" href="overload6.html" title="async_read_until (6 of 12 overloads)">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload4.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload6.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload5"></a><a class="link" href="overload5.html" title="async_read_until (5 of 12 overloads)">async_read_until
|
||||
(5 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a streambuf until it
|
||||
contains a specified delimiter.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename Allocator,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
asio::basic_streambuf< Allocator > & b,
|
||||
char delim,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified streambuf
|
||||
until the streambuf's get area contains the specified delimiter. The function
|
||||
call always returns immediately. The asynchronous operation will continue
|
||||
until one of the following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The get area of the streambuf contains the specified delimiter.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the streambuf's get area already contains the delimiter, this asynchronous
|
||||
operation completes immediately. The program must ensure that the stream
|
||||
performs no other read operations (such as async_read, async_read_until,
|
||||
the stream's async_read_some function, or any other composed operations
|
||||
that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload5.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload5.parameters"></a></span><a class="link" href="overload5.html#asio.reference.async_read_until.overload5.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">b</span></dt>
|
||||
<dd><p>
|
||||
A streambuf object into which the data will be read. Ownership of
|
||||
the streambuf is retained by the caller, which must guarantee that
|
||||
it remains valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">delim</span></dt>
|
||||
<dd><p>
|
||||
The delimiter character.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the streambuf's get
|
||||
// area up to and including the delimiter.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload5.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload5.remarks"></a></span><a class="link" href="overload5.html#asio.reference.async_read_until.overload5.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the streambuf may contain
|
||||
additional data beyond the delimiter. An application will typically leave
|
||||
that data in the streambuf for a subsequent async_read_until operation
|
||||
to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload5.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload5.example"></a></span><a class="link" href="overload5.html#asio.reference.async_read_until.overload5.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a streambuf until a newline is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">asio::streambuf b;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::istream is(&b);
|
||||
std::string line;
|
||||
std::getline(is, line);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, b, '\n', handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the buffer <code class="computeroutput">b</code> contains the delimiter:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">std::getline</code> then extracts the data up to and
|
||||
including the newline (which is discarded), so that the string <code class="computeroutput">line</code>
|
||||
contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c' }
|
||||
</pre>
|
||||
<p>
|
||||
The remaining data is left in the buffer <code class="computeroutput">b</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload4.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload6.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,177 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
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<title>async_read_until (6 of 12 overloads)</title>
|
||||
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
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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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<link rel="up" href="../async_read_until.html" title="async_read_until">
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<link rel="prev" href="overload5.html" title="async_read_until (5 of 12 overloads)">
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<link rel="next" href="overload7.html" title="async_read_until (7 of 12 overloads)">
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</head>
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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">
|
||||
<a accesskey="p" href="overload5.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload7.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload6"></a><a class="link" href="overload6.html" title="async_read_until (6 of 12 overloads)">async_read_until
|
||||
(6 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a streambuf until it
|
||||
contains a specified delimiter.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename Allocator,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
asio::basic_streambuf< Allocator > & b,
|
||||
string_view delim,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified streambuf
|
||||
until the streambuf's get area contains the specified delimiter. The function
|
||||
call always returns immediately. The asynchronous operation will continue
|
||||
until one of the following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The get area of the streambuf contains the specified delimiter.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the streambuf's get area already contains the delimiter, this asynchronous
|
||||
operation completes immediately. The program must ensure that the stream
|
||||
performs no other read operations (such as async_read, async_read_until,
|
||||
the stream's async_read_some function, or any other composed operations
|
||||
that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload6.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload6.parameters"></a></span><a class="link" href="overload6.html#asio.reference.async_read_until.overload6.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">b</span></dt>
|
||||
<dd><p>
|
||||
A streambuf object into which the data will be read. Ownership of
|
||||
the streambuf is retained by the caller, which must guarantee that
|
||||
it remains valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">delim</span></dt>
|
||||
<dd><p>
|
||||
The delimiter string.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the streambuf's get
|
||||
// area up to and including the delimiter.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload6.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload6.remarks"></a></span><a class="link" href="overload6.html#asio.reference.async_read_until.overload6.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the streambuf may contain
|
||||
additional data beyond the delimiter. An application will typically leave
|
||||
that data in the streambuf for a subsequent async_read_until operation
|
||||
to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload6.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload6.example"></a></span><a class="link" href="overload6.html#asio.reference.async_read_until.overload6.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a streambuf until a newline is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">asio::streambuf b;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::istream is(&b);
|
||||
std::string line;
|
||||
std::getline(is, line);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, b, "\r\n", handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the buffer <code class="computeroutput">b</code> contains the delimiter:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">std::getline</code> then extracts the data up to and
|
||||
including the newline (which is discarded), so that the string <code class="computeroutput">line</code>
|
||||
contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r' }
|
||||
</pre>
|
||||
<p>
|
||||
The remaining data is left in the buffer <code class="computeroutput">b</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload5.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload7.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,180 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
||||
<title>async_read_until (7 of 12 overloads)</title>
|
||||
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
|
||||
<link rel="home" href="../../../index.html" title="Asio">
|
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<link rel="up" href="../async_read_until.html" title="async_read_until">
|
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<link rel="prev" href="overload6.html" title="async_read_until (6 of 12 overloads)">
|
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<link rel="next" href="overload8.html" title="async_read_until (8 of 12 overloads)">
|
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</head>
|
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload6.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload8.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload7"></a><a class="link" href="overload7.html" title="async_read_until (7 of 12 overloads)">async_read_until
|
||||
(7 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a streambuf until some
|
||||
part of its data matches a regular expression.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename Allocator,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
asio::basic_streambuf< Allocator > & b,
|
||||
const boost::regex & expr,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified streambuf
|
||||
until the streambuf's get area contains some data that matches a regular
|
||||
expression. The function call always returns immediately. The asynchronous
|
||||
operation will continue until one of the following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
A substring of the streambuf's get area matches the regular expression.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the streambuf's get area already contains data that matches the regular
|
||||
expression, this asynchronous operation completes immediately. The program
|
||||
must ensure that the stream performs no other read operations (such as
|
||||
async_read, async_read_until, the stream's async_read_some function, or
|
||||
any other composed operations that perform reads) until this operation
|
||||
completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload7.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload7.parameters"></a></span><a class="link" href="overload7.html#asio.reference.async_read_until.overload7.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">b</span></dt>
|
||||
<dd><p>
|
||||
A streambuf object into which the data will be read. Ownership of
|
||||
the streambuf is retained by the caller, which must guarantee that
|
||||
it remains valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">expr</span></dt>
|
||||
<dd><p>
|
||||
The regular expression.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the streambuf's get
|
||||
// area up to and including the substring
|
||||
// that matches the regular. expression.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload7.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload7.remarks"></a></span><a class="link" href="overload7.html#asio.reference.async_read_until.overload7.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the streambuf may contain
|
||||
additional data beyond that which matched the regular expression. An application
|
||||
will typically leave that data in the streambuf for a subsequent async_read_until
|
||||
operation to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload7.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload7.example"></a></span><a class="link" href="overload7.html#asio.reference.async_read_until.overload7.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a streambuf until a CR-LF sequence is
|
||||
encountered:
|
||||
</p>
|
||||
<pre class="programlisting">asio::streambuf b;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::istream is(&b);
|
||||
std::string line;
|
||||
std::getline(is, line);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, b, boost::regex("\r\n"), handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the buffer <code class="computeroutput">b</code> contains the data which matched the regular expression:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">std::getline</code> then extracts the data up to and
|
||||
including the newline (which is discarded), so that the string <code class="computeroutput">line</code>
|
||||
contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\r' }
|
||||
</pre>
|
||||
<p>
|
||||
The remaining data is left in the buffer <code class="computeroutput">b</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload6.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload8.html"><img src="../../../next.png" alt="Next"></a>
|
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|
||||
</body>
|
||||
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|
||||
@@ -0,0 +1,220 @@
|
||||
<html>
|
||||
<head>
|
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
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<title>async_read_until (8 of 12 overloads)</title>
|
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<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
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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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<link rel="up" href="../async_read_until.html" title="async_read_until">
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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="overload7.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload9.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload8"></a><a class="link" href="overload8.html" title="async_read_until (8 of 12 overloads)">async_read_until
|
||||
(8 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a streambuf until a function
|
||||
object indicates a match.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename Allocator,
|
||||
typename MatchCondition,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
asio::basic_streambuf< Allocator > & b,
|
||||
MatchCondition match_condition,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_match_condition< MatchCondition >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified streambuf
|
||||
until a user-defined match condition function object, when applied to the
|
||||
data contained in the streambuf, indicates a successful match. The function
|
||||
call always returns immediately. The asynchronous operation will continue
|
||||
until one of the following conditions is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The match condition function object returns a std::pair where the second
|
||||
element evaluates to true.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the match condition function object already indicates a match, this
|
||||
asynchronous operation completes immediately. The program must ensure that
|
||||
the stream performs no other read operations (such as async_read, async_read_until,
|
||||
the stream's async_read_some function, or any other composed operations
|
||||
that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload8.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload8.parameters"></a></span><a class="link" href="overload8.html#asio.reference.async_read_until.overload8.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">b</span></dt>
|
||||
<dd><p>
|
||||
A streambuf object into which the data will be read.
|
||||
</p></dd>
|
||||
<dt><span class="term">match_condition</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The function object to be called to determine whether a match exists.
|
||||
The signature of the function object must be:
|
||||
</p>
|
||||
<pre class="programlisting">pair<iterator, bool> match_condition(iterator begin, iterator end);
|
||||
</pre>
|
||||
<p>
|
||||
where <code class="computeroutput">iterator</code> represents the type:
|
||||
</p>
|
||||
<pre class="programlisting">buffers_iterator<basic_streambuf<Allocator>::const_buffers_type>
|
||||
</pre>
|
||||
<p>
|
||||
The iterator parameters <code class="computeroutput">begin</code> and <code class="computeroutput">end</code> define
|
||||
the range of bytes to be scanned to determine whether there is a
|
||||
match. The <code class="computeroutput">first</code> member of the return value is an iterator
|
||||
marking one-past-the-end of the bytes that have been consumed by
|
||||
the match function. This iterator is used to calculate the <code class="computeroutput">begin</code>
|
||||
parameter for any subsequent invocation of the match condition. The
|
||||
<code class="computeroutput">second</code> member of the return value is true if a match
|
||||
has been found, false otherwise.
|
||||
</p>
|
||||
</dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the streambuf's get
|
||||
// area that have been fully consumed by the
|
||||
// match function. O if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload8.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload8.remarks"></a></span><a class="link" href="overload8.html#asio.reference.async_read_until.overload8.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the streambuf may contain
|
||||
additional data beyond that which matched the function object. An application
|
||||
will typically leave that data in the streambuf for a subsequent async_read_until
|
||||
operation to examine.
|
||||
</p>
|
||||
<p>
|
||||
The default implementation of the <code class="computeroutput">is_match_condition</code> type
|
||||
trait evaluates to true for function pointers and function objects with
|
||||
a <code class="computeroutput">result_type</code> typedef. It must be specialised for other user-defined
|
||||
function objects.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload8.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload8.examples"></a></span><a class="link" href="overload8.html#asio.reference.async_read_until.overload8.examples">Examples</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a streambuf until whitespace is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">typedef asio::buffers_iterator<
|
||||
asio::streambuf::const_buffers_type> iterator;
|
||||
|
||||
std::pair<iterator, bool>
|
||||
match_whitespace(iterator begin, iterator end)
|
||||
{
|
||||
iterator i = begin;
|
||||
while (i != end)
|
||||
if (std::isspace(*i++))
|
||||
return std::make_pair(i, true);
|
||||
return std::make_pair(i, false);
|
||||
}
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size);
|
||||
...
|
||||
asio::streambuf b;
|
||||
asio::async_read_until(s, b, match_whitespace, handler);
|
||||
</pre>
|
||||
<p>
|
||||
To asynchronously read data into a streambuf until a matching character
|
||||
is found:
|
||||
</p>
|
||||
<pre class="programlisting">class match_char
|
||||
{
|
||||
public:
|
||||
explicit match_char(char c) : c_(c) {}
|
||||
|
||||
template <typename Iterator>
|
||||
std::pair<Iterator, bool> operator()(
|
||||
Iterator begin, Iterator end) const
|
||||
{
|
||||
Iterator i = begin;
|
||||
while (i != end)
|
||||
if (c_ == *i++)
|
||||
return std::make_pair(i, true);
|
||||
return std::make_pair(i, false);
|
||||
}
|
||||
|
||||
private:
|
||||
char c_;
|
||||
};
|
||||
|
||||
namespace asio {
|
||||
template <> struct is_match_condition<match_char>
|
||||
: public boost::true_type {};
|
||||
} // namespace asio
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size);
|
||||
...
|
||||
asio::streambuf b;
|
||||
asio::async_read_until(s, b, match_char('a'), handler);
|
||||
</pre>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload7.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload9.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
@@ -0,0 +1,181 @@
|
||||
<html>
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
||||
<title>async_read_until (9 of 12 overloads)</title>
|
||||
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
||||
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
|
||||
<link rel="home" href="../../../index.html" title="Asio">
|
||||
<link rel="up" href="../async_read_until.html" title="async_read_until">
|
||||
<link rel="prev" href="overload8.html" title="async_read_until (8 of 12 overloads)">
|
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<link rel="next" href="overload10.html" title="async_read_until (10 of 12 overloads)">
|
||||
</head>
|
||||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||||
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
<a accesskey="p" href="overload8.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../async_read_until.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="overload10.html"><img src="../../../next.png" alt="Next"></a>
|
||||
</div>
|
||||
<div class="section">
|
||||
<div class="titlepage"><div><div><h4 class="title">
|
||||
<a name="asio.reference.async_read_until.overload9"></a><a class="link" href="overload9.html" title="async_read_until (9 of 12 overloads)">async_read_until
|
||||
(9 of 12 overloads)</a>
|
||||
</h4></div></div></div>
|
||||
<p>
|
||||
Start an asynchronous operation to read data into a dynamic buffer sequence
|
||||
until it contains a specified delimiter.
|
||||
</p>
|
||||
<pre class="programlisting">template<
|
||||
typename <a class="link" href="../AsyncReadStream.html" title="Buffer-oriented asynchronous read stream requirements">AsyncReadStream</a>,
|
||||
typename <a class="link" href="../DynamicBuffer_v2.html" title="Dynamic buffer requirements (version 2)">DynamicBuffer_v2</a>,
|
||||
typename <a class="link" href="../ReadHandler.html" title="Read handler requirements">ReadHandler</a> = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
|
||||
<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_until(
|
||||
AsyncReadStream & s,
|
||||
DynamicBuffer_v2 buffers,
|
||||
char delim,
|
||||
ReadHandler && handler = <a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
|
||||
typename enable_if< is_dynamic_buffer_v2< DynamicBuffer_v2 >::value >::type * = 0);
|
||||
</pre>
|
||||
<p>
|
||||
This function is used to asynchronously read data into the specified dynamic
|
||||
buffer sequence until the dynamic buffer sequence's get area contains the
|
||||
specified delimiter. The function call always returns immediately. The
|
||||
asynchronous operation will continue until one of the following conditions
|
||||
is true:
|
||||
</p>
|
||||
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
|
||||
<li class="listitem">
|
||||
The get area of the dynamic buffer sequence contains the specified
|
||||
delimiter.
|
||||
</li>
|
||||
<li class="listitem">
|
||||
An error occurred.
|
||||
</li>
|
||||
</ul></div>
|
||||
<p>
|
||||
This operation is implemented in terms of zero or more calls to the stream's
|
||||
async_read_some function, and is known as a <span class="emphasis"><em>composed operation</em></span>.
|
||||
If the dynamic buffer sequence's get area already contains the delimiter,
|
||||
this asynchronous operation completes immediately. The program must ensure
|
||||
that the stream performs no other read operations (such as async_read,
|
||||
async_read_until, the stream's async_read_some function, or any other composed
|
||||
operations that perform reads) until this operation completes.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload9.h0"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload9.parameters"></a></span><a class="link" href="overload9.html#asio.reference.async_read_until.overload9.parameters">Parameters</a>
|
||||
</h6>
|
||||
<div class="variablelist">
|
||||
<p class="title"><b></b></p>
|
||||
<dl>
|
||||
<dt><span class="term">s</span></dt>
|
||||
<dd><p>
|
||||
The stream from which the data is to be read. The type must support
|
||||
the AsyncReadStream concept.
|
||||
</p></dd>
|
||||
<dt><span class="term">buffers</span></dt>
|
||||
<dd><p>
|
||||
The dynamic buffer sequence into which the data will be read. Although
|
||||
the buffers object may be copied as necessary, ownership of the underlying
|
||||
memory blocks is retained by the caller, which must guarantee that
|
||||
they remain valid until the handler is called.
|
||||
</p></dd>
|
||||
<dt><span class="term">delim</span></dt>
|
||||
<dd><p>
|
||||
The delimiter character.
|
||||
</p></dd>
|
||||
<dt><span class="term">handler</span></dt>
|
||||
<dd>
|
||||
<p>
|
||||
The handler to be called when the read operation completes. Copies
|
||||
will be made of the handler as required. The function signature of
|
||||
the handler must be:
|
||||
</p>
|
||||
<pre class="programlisting">void handler(
|
||||
// Result of operation.
|
||||
const asio::error_code& error,
|
||||
|
||||
// The number of bytes in the dynamic buffer sequence's
|
||||
// get area up to and including the delimiter.
|
||||
// 0 if an error occurred.
|
||||
std::size_t bytes_transferred
|
||||
);
|
||||
</pre>
|
||||
<p>
|
||||
Regardless of whether the asynchronous operation completes immediately
|
||||
or not, the handler will not be invoked from within this function.
|
||||
On immediate completion, invocation of the handler will be performed
|
||||
in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
|
||||
</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload9.h1"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload9.remarks"></a></span><a class="link" href="overload9.html#asio.reference.async_read_until.overload9.remarks">Remarks</a>
|
||||
</h6>
|
||||
<p>
|
||||
After a successful async_read_until operation, the dynamic buffer sequence
|
||||
may contain additional data beyond the delimiter. An application will typically
|
||||
leave that data in the dynamic buffer sequence for a subsequent async_read_until
|
||||
operation to examine.
|
||||
</p>
|
||||
<h6>
|
||||
<a name="asio.reference.async_read_until.overload9.h2"></a>
|
||||
<span><a name="asio.reference.async_read_until.overload9.example"></a></span><a class="link" href="overload9.html#asio.reference.async_read_until.overload9.example">Example</a>
|
||||
</h6>
|
||||
<p>
|
||||
To asynchronously read data into a <code class="computeroutput">std::string</code> until a newline
|
||||
is encountered:
|
||||
</p>
|
||||
<pre class="programlisting">std::string data;
|
||||
...
|
||||
void handler(const asio::error_code& e, std::size_t size)
|
||||
{
|
||||
if (!e)
|
||||
{
|
||||
std::string line = data.substr(0, n);
|
||||
data.erase(0, n);
|
||||
...
|
||||
}
|
||||
}
|
||||
...
|
||||
asio::async_read_until(s, data, '\n', handler);
|
||||
</pre>
|
||||
<p>
|
||||
After the <code class="computeroutput">async_read_until</code> operation completes successfully,
|
||||
the buffer <code class="computeroutput">data</code> contains the delimiter:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\n', 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
The call to <code class="computeroutput">substr</code> then extracts the data up to and including
|
||||
the delimiter, so that the string <code class="computeroutput">line</code> contains:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'a', 'b', ..., 'c', '\n' }
|
||||
</pre>
|
||||
<p>
|
||||
After the call to <code class="computeroutput">erase</code>, the remaining data is left in the
|
||||
buffer <code class="computeroutput">data</code> as follows:
|
||||
</p>
|
||||
<pre class="programlisting">{ 'd', 'e', ... }
|
||||
</pre>
|
||||
<p>
|
||||
This data may be the start of a new line, to be extracted by a subsequent
|
||||
<code class="computeroutput">async_read_until</code> operation.
|
||||
</p>
|
||||
</div>
|
||||
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
||||
<td align="left"></td>
|
||||
<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
|
||||
Kohlhoff<p>
|
||||
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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||||
</p>
|
||||
</div></td>
|
||||
</tr></table>
|
||||
<hr>
|
||||
<div class="spirit-nav">
|
||||
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|
||||
</div>
|
||||
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|
||||
</html>
|
||||
Reference in new issue
Block a user