mirror of
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1150 lines
38 KiB
C++
1150 lines
38 KiB
C++
//
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// impl/read_until.hpp
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// ~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_IMPL_READ_UNTIL_HPP
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#define BOOST_ASIO_IMPL_READ_UNTIL_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <algorithm>
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#include <string>
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#include <vector>
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#include <utility>
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#include <boost/asio/buffer.hpp>
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#include <boost/asio/buffers_iterator.hpp>
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#include <boost/asio/detail/bind_handler.hpp>
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#include <boost/asio/detail/handler_alloc_helpers.hpp>
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#include <boost/asio/detail/handler_cont_helpers.hpp>
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#include <boost/asio/detail/handler_invoke_helpers.hpp>
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#include <boost/asio/detail/handler_type_requirements.hpp>
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#include <boost/asio/detail/limits.hpp>
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#include <boost/asio/detail/throw_error.hpp>
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#include <boost/asio/detail/push_options.hpp>
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namespace boost {
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namespace asio {
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template <typename SyncReadStream, typename Allocator>
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inline std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, char delim)
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{
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boost::system::error_code ec;
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std::size_t bytes_transferred = read_until(s, b, delim, ec);
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boost::asio::detail::throw_error(ec, "read_until");
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return bytes_transferred;
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}
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template <typename SyncReadStream, typename Allocator>
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std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, char delim,
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boost::system::error_code& ec)
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{
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std::size_t search_position = 0;
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for (;;)
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{
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// Determine the range of the data to be searched.
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typedef typename boost::asio::basic_streambuf<
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Allocator>::const_buffers_type const_buffers_type;
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typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
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const_buffers_type buffers = b.data();
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iterator begin = iterator::begin(buffers);
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iterator start_pos = begin + search_position;
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iterator end = iterator::end(buffers);
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// Look for a match.
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iterator iter = std::find(start_pos, end, delim);
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if (iter != end)
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{
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// Found a match. We're done.
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ec = boost::system::error_code();
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return iter - begin + 1;
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}
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else
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{
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// No match. Next search can start with the new data.
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search_position = end - begin;
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}
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// Check if buffer is full.
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if (b.size() == b.max_size())
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{
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ec = error::not_found;
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return 0;
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}
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// Need more data.
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std::size_t bytes_to_read = read_size_helper(b, 65536);
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b.commit(s.read_some(b.prepare(bytes_to_read), ec));
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if (ec)
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return 0;
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}
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}
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template <typename SyncReadStream, typename Allocator>
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inline std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, const std::string& delim)
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{
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boost::system::error_code ec;
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std::size_t bytes_transferred = read_until(s, b, delim, ec);
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boost::asio::detail::throw_error(ec, "read_until");
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return bytes_transferred;
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}
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namespace detail
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{
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// Algorithm that finds a subsequence of equal values in a sequence. Returns
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// (iterator,true) if a full match was found, in which case the iterator
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// points to the beginning of the match. Returns (iterator,false) if a
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// partial match was found at the end of the first sequence, in which case
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// the iterator points to the beginning of the partial match. Returns
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// (last1,false) if no full or partial match was found.
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template <typename Iterator1, typename Iterator2>
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std::pair<Iterator1, bool> partial_search(
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Iterator1 first1, Iterator1 last1, Iterator2 first2, Iterator2 last2)
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{
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for (Iterator1 iter1 = first1; iter1 != last1; ++iter1)
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{
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Iterator1 test_iter1 = iter1;
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Iterator2 test_iter2 = first2;
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for (;; ++test_iter1, ++test_iter2)
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{
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if (test_iter2 == last2)
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return std::make_pair(iter1, true);
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if (test_iter1 == last1)
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{
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if (test_iter2 != first2)
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return std::make_pair(iter1, false);
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else
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break;
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}
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if (*test_iter1 != *test_iter2)
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break;
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}
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}
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return std::make_pair(last1, false);
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}
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} // namespace detail
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template <typename SyncReadStream, typename Allocator>
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std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, const std::string& delim,
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boost::system::error_code& ec)
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{
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std::size_t search_position = 0;
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for (;;)
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{
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// Determine the range of the data to be searched.
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typedef typename boost::asio::basic_streambuf<
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Allocator>::const_buffers_type const_buffers_type;
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typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
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const_buffers_type buffers = b.data();
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iterator begin = iterator::begin(buffers);
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iterator start_pos = begin + search_position;
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iterator end = iterator::end(buffers);
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// Look for a match.
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std::pair<iterator, bool> result = detail::partial_search(
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start_pos, end, delim.begin(), delim.end());
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if (result.first != end)
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{
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if (result.second)
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{
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// Full match. We're done.
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ec = boost::system::error_code();
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return result.first - begin + delim.length();
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}
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else
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{
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// Partial match. Next search needs to start from beginning of match.
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search_position = result.first - begin;
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}
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}
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else
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{
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// No match. Next search can start with the new data.
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search_position = end - begin;
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}
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// Check if buffer is full.
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if (b.size() == b.max_size())
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{
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ec = error::not_found;
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return 0;
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}
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// Need more data.
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std::size_t bytes_to_read = read_size_helper(b, 65536);
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b.commit(s.read_some(b.prepare(bytes_to_read), ec));
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if (ec)
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return 0;
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}
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}
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#if defined(BOOST_ASIO_HAS_BOOST_REGEX)
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template <typename SyncReadStream, typename Allocator>
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inline std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, const boost::regex& expr)
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{
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boost::system::error_code ec;
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std::size_t bytes_transferred = read_until(s, b, expr, ec);
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boost::asio::detail::throw_error(ec, "read_until");
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return bytes_transferred;
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}
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template <typename SyncReadStream, typename Allocator>
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std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, const boost::regex& expr,
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boost::system::error_code& ec)
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{
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std::size_t search_position = 0;
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for (;;)
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{
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// Determine the range of the data to be searched.
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typedef typename boost::asio::basic_streambuf<
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Allocator>::const_buffers_type const_buffers_type;
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typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
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const_buffers_type buffers = b.data();
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iterator begin = iterator::begin(buffers);
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iterator start_pos = begin + search_position;
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iterator end = iterator::end(buffers);
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// Look for a match.
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boost::match_results<iterator,
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typename std::vector<boost::sub_match<iterator> >::allocator_type>
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match_results;
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if (regex_search(start_pos, end, match_results, expr,
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boost::match_default | boost::match_partial))
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{
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if (match_results[0].matched)
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{
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// Full match. We're done.
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ec = boost::system::error_code();
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return match_results[0].second - begin;
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}
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else
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{
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// Partial match. Next search needs to start from beginning of match.
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search_position = match_results[0].first - begin;
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}
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}
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else
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{
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// No match. Next search can start with the new data.
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search_position = end - begin;
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}
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// Check if buffer is full.
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if (b.size() == b.max_size())
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{
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ec = error::not_found;
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return 0;
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}
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// Need more data.
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std::size_t bytes_to_read = read_size_helper(b, 65536);
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b.commit(s.read_some(b.prepare(bytes_to_read), ec));
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if (ec)
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return 0;
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}
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}
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#endif // defined(BOOST_ASIO_HAS_BOOST_REGEX)
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template <typename SyncReadStream, typename Allocator, typename MatchCondition>
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std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b,
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MatchCondition match_condition, boost::system::error_code& ec,
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typename enable_if<is_match_condition<MatchCondition>::value>::type*)
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{
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std::size_t search_position = 0;
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for (;;)
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{
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// Determine the range of the data to be searched.
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typedef typename boost::asio::basic_streambuf<
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Allocator>::const_buffers_type const_buffers_type;
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typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
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const_buffers_type buffers = b.data();
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iterator begin = iterator::begin(buffers);
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iterator start_pos = begin + search_position;
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iterator end = iterator::end(buffers);
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// Look for a match.
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std::pair<iterator, bool> result = match_condition(start_pos, end);
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if (result.second)
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{
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// Full match. We're done.
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ec = boost::system::error_code();
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return result.first - begin;
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}
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else if (result.first != end)
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{
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// Partial match. Next search needs to start from beginning of match.
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search_position = result.first - begin;
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}
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else
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{
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// No match. Next search can start with the new data.
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search_position = end - begin;
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}
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// Check if buffer is full.
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if (b.size() == b.max_size())
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{
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ec = error::not_found;
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return 0;
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}
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// Need more data.
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std::size_t bytes_to_read = read_size_helper(b, 65536);
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b.commit(s.read_some(b.prepare(bytes_to_read), ec));
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if (ec)
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return 0;
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}
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}
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template <typename SyncReadStream, typename Allocator, typename MatchCondition>
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inline std::size_t read_until(SyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, MatchCondition match_condition,
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typename enable_if<is_match_condition<MatchCondition>::value>::type*)
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{
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boost::system::error_code ec;
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std::size_t bytes_transferred = read_until(s, b, match_condition, ec);
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boost::asio::detail::throw_error(ec, "read_until");
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return bytes_transferred;
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}
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namespace detail
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{
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template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
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class read_until_delim_op
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{
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public:
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read_until_delim_op(AsyncReadStream& stream,
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boost::asio::basic_streambuf<Allocator>& streambuf,
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char delim, ReadHandler& handler)
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: stream_(stream),
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streambuf_(streambuf),
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delim_(delim),
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start_(0),
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search_position_(0),
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handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(handler))
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{
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}
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#if defined(BOOST_ASIO_HAS_MOVE)
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read_until_delim_op(const read_until_delim_op& other)
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: stream_(other.stream_),
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streambuf_(other.streambuf_),
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delim_(other.delim_),
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start_(other.start_),
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search_position_(other.search_position_),
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handler_(other.handler_)
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{
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}
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read_until_delim_op(read_until_delim_op&& other)
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: stream_(other.stream_),
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streambuf_(other.streambuf_),
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delim_(other.delim_),
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start_(other.start_),
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search_position_(other.search_position_),
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handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(other.handler_))
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{
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}
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#endif // defined(BOOST_ASIO_HAS_MOVE)
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void operator()(const boost::system::error_code& ec,
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std::size_t bytes_transferred, int start = 0)
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{
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const std::size_t not_found = (std::numeric_limits<std::size_t>::max)();
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std::size_t bytes_to_read;
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switch (start_ = start)
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{
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case 1:
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for (;;)
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{
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{
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// Determine the range of the data to be searched.
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typedef typename boost::asio::basic_streambuf<
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Allocator>::const_buffers_type const_buffers_type;
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typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
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const_buffers_type buffers = streambuf_.data();
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iterator begin = iterator::begin(buffers);
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iterator start_pos = begin + search_position_;
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iterator end = iterator::end(buffers);
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// Look for a match.
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iterator iter = std::find(start_pos, end, delim_);
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if (iter != end)
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{
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// Found a match. We're done.
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search_position_ = iter - begin + 1;
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bytes_to_read = 0;
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}
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// No match yet. Check if buffer is full.
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else if (streambuf_.size() == streambuf_.max_size())
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{
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search_position_ = not_found;
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bytes_to_read = 0;
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}
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// Need to read some more data.
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else
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{
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// Next search can start with the new data.
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search_position_ = end - begin;
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bytes_to_read = read_size_helper(streambuf_, 65536);
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}
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}
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// Check if we're done.
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if (!start && bytes_to_read == 0)
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break;
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// Start a new asynchronous read operation to obtain more data.
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stream_.async_read_some(streambuf_.prepare(bytes_to_read),
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BOOST_ASIO_MOVE_CAST(read_until_delim_op)(*this));
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return; default:
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streambuf_.commit(bytes_transferred);
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if (ec || bytes_transferred == 0)
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break;
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}
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const boost::system::error_code result_ec =
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(search_position_ == not_found)
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? error::not_found : ec;
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const std::size_t result_n =
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(ec || search_position_ == not_found)
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? 0 : search_position_;
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handler_(result_ec, result_n);
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}
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}
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//private:
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AsyncReadStream& stream_;
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boost::asio::basic_streambuf<Allocator>& streambuf_;
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char delim_;
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int start_;
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std::size_t search_position_;
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ReadHandler handler_;
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};
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template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
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inline void* asio_handler_allocate(std::size_t size,
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read_until_delim_op<AsyncReadStream,
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Allocator, ReadHandler>* this_handler)
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{
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return boost_asio_handler_alloc_helpers::allocate(
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size, this_handler->handler_);
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}
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template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
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inline void asio_handler_deallocate(void* pointer, std::size_t size,
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read_until_delim_op<AsyncReadStream,
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Allocator, ReadHandler>* this_handler)
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{
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boost_asio_handler_alloc_helpers::deallocate(
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pointer, size, this_handler->handler_);
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}
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template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
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inline bool asio_handler_is_continuation(
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read_until_delim_op<AsyncReadStream,
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Allocator, ReadHandler>* this_handler)
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{
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return this_handler->start_ == 0 ? true
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: boost_asio_handler_cont_helpers::is_continuation(
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this_handler->handler_);
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}
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template <typename Function, typename AsyncReadStream, typename Allocator,
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typename ReadHandler>
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inline void asio_handler_invoke(Function& function,
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read_until_delim_op<AsyncReadStream,
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Allocator, ReadHandler>* this_handler)
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{
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boost_asio_handler_invoke_helpers::invoke(
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function, this_handler->handler_);
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}
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template <typename Function, typename AsyncReadStream, typename Allocator,
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typename ReadHandler>
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inline void asio_handler_invoke(const Function& function,
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read_until_delim_op<AsyncReadStream,
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Allocator, ReadHandler>* this_handler)
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{
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boost_asio_handler_invoke_helpers::invoke(
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function, this_handler->handler_);
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}
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} // namespace detail
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template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
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BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
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void (boost::system::error_code, std::size_t))
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async_read_until(AsyncReadStream& s,
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boost::asio::basic_streambuf<Allocator>& b, char delim,
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BOOST_ASIO_MOVE_ARG(ReadHandler) handler)
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{
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// If you get an error on the following line it means that your handler does
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// not meet the documented type requirements for a ReadHandler.
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BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
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detail::async_result_init<
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ReadHandler, void (boost::system::error_code, std::size_t)> init(
|
|
BOOST_ASIO_MOVE_CAST(ReadHandler)(handler));
|
|
|
|
detail::read_until_delim_op<AsyncReadStream,
|
|
Allocator, BOOST_ASIO_HANDLER_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))>(
|
|
s, b, delim, init.handler)(
|
|
boost::system::error_code(), 0, 1);
|
|
|
|
return init.result.get();
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
|
|
class read_until_delim_string_op
|
|
{
|
|
public:
|
|
read_until_delim_string_op(AsyncReadStream& stream,
|
|
boost::asio::basic_streambuf<Allocator>& streambuf,
|
|
const std::string& delim, ReadHandler& handler)
|
|
: stream_(stream),
|
|
streambuf_(streambuf),
|
|
delim_(delim),
|
|
start_(0),
|
|
search_position_(0),
|
|
handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(handler))
|
|
{
|
|
}
|
|
|
|
#if defined(BOOST_ASIO_HAS_MOVE)
|
|
read_until_delim_string_op(const read_until_delim_string_op& other)
|
|
: stream_(other.stream_),
|
|
streambuf_(other.streambuf_),
|
|
delim_(other.delim_),
|
|
start_(other.start_),
|
|
search_position_(other.search_position_),
|
|
handler_(other.handler_)
|
|
{
|
|
}
|
|
|
|
read_until_delim_string_op(read_until_delim_string_op&& other)
|
|
: stream_(other.stream_),
|
|
streambuf_(other.streambuf_),
|
|
delim_(BOOST_ASIO_MOVE_CAST(std::string)(other.delim_)),
|
|
start_(other.start_),
|
|
search_position_(other.search_position_),
|
|
handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(other.handler_))
|
|
{
|
|
}
|
|
#endif // defined(BOOST_ASIO_HAS_MOVE)
|
|
|
|
void operator()(const boost::system::error_code& ec,
|
|
std::size_t bytes_transferred, int start = 0)
|
|
{
|
|
const std::size_t not_found = (std::numeric_limits<std::size_t>::max)();
|
|
std::size_t bytes_to_read;
|
|
switch (start_ = start)
|
|
{
|
|
case 1:
|
|
for (;;)
|
|
{
|
|
{
|
|
// Determine the range of the data to be searched.
|
|
typedef typename boost::asio::basic_streambuf<
|
|
Allocator>::const_buffers_type const_buffers_type;
|
|
typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
|
|
const_buffers_type buffers = streambuf_.data();
|
|
iterator begin = iterator::begin(buffers);
|
|
iterator start_pos = begin + search_position_;
|
|
iterator end = iterator::end(buffers);
|
|
|
|
// Look for a match.
|
|
std::pair<iterator, bool> result = detail::partial_search(
|
|
start_pos, end, delim_.begin(), delim_.end());
|
|
if (result.first != end && result.second)
|
|
{
|
|
// Full match. We're done.
|
|
search_position_ = result.first - begin + delim_.length();
|
|
bytes_to_read = 0;
|
|
}
|
|
|
|
// No match yet. Check if buffer is full.
|
|
else if (streambuf_.size() == streambuf_.max_size())
|
|
{
|
|
search_position_ = not_found;
|
|
bytes_to_read = 0;
|
|
}
|
|
|
|
// Need to read some more data.
|
|
else
|
|
{
|
|
if (result.first != end)
|
|
{
|
|
// Partial match. Next search needs to start from beginning of
|
|
// match.
|
|
search_position_ = result.first - begin;
|
|
}
|
|
else
|
|
{
|
|
// Next search can start with the new data.
|
|
search_position_ = end - begin;
|
|
}
|
|
|
|
bytes_to_read = read_size_helper(streambuf_, 65536);
|
|
}
|
|
}
|
|
|
|
// Check if we're done.
|
|
if (!start && bytes_to_read == 0)
|
|
break;
|
|
|
|
// Start a new asynchronous read operation to obtain more data.
|
|
stream_.async_read_some(streambuf_.prepare(bytes_to_read),
|
|
BOOST_ASIO_MOVE_CAST(read_until_delim_string_op)(*this));
|
|
return; default:
|
|
streambuf_.commit(bytes_transferred);
|
|
if (ec || bytes_transferred == 0)
|
|
break;
|
|
}
|
|
|
|
const boost::system::error_code result_ec =
|
|
(search_position_ == not_found)
|
|
? error::not_found : ec;
|
|
|
|
const std::size_t result_n =
|
|
(ec || search_position_ == not_found)
|
|
? 0 : search_position_;
|
|
|
|
handler_(result_ec, result_n);
|
|
}
|
|
}
|
|
|
|
//private:
|
|
AsyncReadStream& stream_;
|
|
boost::asio::basic_streambuf<Allocator>& streambuf_;
|
|
std::string delim_;
|
|
int start_;
|
|
std::size_t search_position_;
|
|
ReadHandler handler_;
|
|
};
|
|
|
|
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
|
|
inline void* asio_handler_allocate(std::size_t size,
|
|
read_until_delim_string_op<AsyncReadStream,
|
|
Allocator, ReadHandler>* this_handler)
|
|
{
|
|
return boost_asio_handler_alloc_helpers::allocate(
|
|
size, this_handler->handler_);
|
|
}
|
|
|
|
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
|
|
inline void asio_handler_deallocate(void* pointer, std::size_t size,
|
|
read_until_delim_string_op<AsyncReadStream,
|
|
Allocator, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_alloc_helpers::deallocate(
|
|
pointer, size, this_handler->handler_);
|
|
}
|
|
|
|
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
|
|
inline bool asio_handler_is_continuation(
|
|
read_until_delim_string_op<AsyncReadStream,
|
|
Allocator, ReadHandler>* this_handler)
|
|
{
|
|
return this_handler->start_ == 0 ? true
|
|
: boost_asio_handler_cont_helpers::is_continuation(
|
|
this_handler->handler_);
|
|
}
|
|
|
|
template <typename Function, typename AsyncReadStream,
|
|
typename Allocator, typename ReadHandler>
|
|
inline void asio_handler_invoke(Function& function,
|
|
read_until_delim_string_op<AsyncReadStream,
|
|
Allocator, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_invoke_helpers::invoke(
|
|
function, this_handler->handler_);
|
|
}
|
|
|
|
template <typename Function, typename AsyncReadStream,
|
|
typename Allocator, typename ReadHandler>
|
|
inline void asio_handler_invoke(const Function& function,
|
|
read_until_delim_string_op<AsyncReadStream,
|
|
Allocator, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_invoke_helpers::invoke(
|
|
function, this_handler->handler_);
|
|
}
|
|
} // namespace detail
|
|
|
|
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
|
|
BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))
|
|
async_read_until(AsyncReadStream& s,
|
|
boost::asio::basic_streambuf<Allocator>& b, const std::string& delim,
|
|
BOOST_ASIO_MOVE_ARG(ReadHandler) handler)
|
|
{
|
|
// If you get an error on the following line it means that your handler does
|
|
// not meet the documented type requirements for a ReadHandler.
|
|
BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
|
|
|
detail::async_result_init<
|
|
ReadHandler, void (boost::system::error_code, std::size_t)> init(
|
|
BOOST_ASIO_MOVE_CAST(ReadHandler)(handler));
|
|
|
|
detail::read_until_delim_string_op<AsyncReadStream,
|
|
Allocator, BOOST_ASIO_HANDLER_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))>(
|
|
s, b, delim, init.handler)(
|
|
boost::system::error_code(), 0, 1);
|
|
|
|
return init.result.get();
|
|
}
|
|
|
|
#if defined(BOOST_ASIO_HAS_BOOST_REGEX)
|
|
|
|
namespace detail
|
|
{
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename RegEx, typename ReadHandler>
|
|
class read_until_expr_op
|
|
{
|
|
public:
|
|
read_until_expr_op(AsyncReadStream& stream,
|
|
boost::asio::basic_streambuf<Allocator>& streambuf,
|
|
const boost::regex& expr, ReadHandler& handler)
|
|
: stream_(stream),
|
|
streambuf_(streambuf),
|
|
expr_(expr),
|
|
start_(0),
|
|
search_position_(0),
|
|
handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(handler))
|
|
{
|
|
}
|
|
|
|
#if defined(BOOST_ASIO_HAS_MOVE)
|
|
read_until_expr_op(const read_until_expr_op& other)
|
|
: stream_(other.stream_),
|
|
streambuf_(other.streambuf_),
|
|
expr_(other.expr_),
|
|
start_(other.start_),
|
|
search_position_(other.search_position_),
|
|
handler_(other.handler_)
|
|
{
|
|
}
|
|
|
|
read_until_expr_op(read_until_expr_op&& other)
|
|
: stream_(other.stream_),
|
|
streambuf_(other.streambuf_),
|
|
expr_(other.expr_),
|
|
start_(other.start_),
|
|
search_position_(other.search_position_),
|
|
handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(other.handler_))
|
|
{
|
|
}
|
|
#endif // defined(BOOST_ASIO_HAS_MOVE)
|
|
|
|
void operator()(const boost::system::error_code& ec,
|
|
std::size_t bytes_transferred, int start = 0)
|
|
{
|
|
const std::size_t not_found = (std::numeric_limits<std::size_t>::max)();
|
|
std::size_t bytes_to_read;
|
|
switch (start_ = start)
|
|
{
|
|
case 1:
|
|
for (;;)
|
|
{
|
|
{
|
|
// Determine the range of the data to be searched.
|
|
typedef typename boost::asio::basic_streambuf<
|
|
Allocator>::const_buffers_type const_buffers_type;
|
|
typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
|
|
const_buffers_type buffers = streambuf_.data();
|
|
iterator begin = iterator::begin(buffers);
|
|
iterator start_pos = begin + search_position_;
|
|
iterator end = iterator::end(buffers);
|
|
|
|
// Look for a match.
|
|
boost::match_results<iterator,
|
|
typename std::vector<boost::sub_match<iterator> >::allocator_type>
|
|
match_results;
|
|
bool match = regex_search(start_pos, end, match_results, expr_,
|
|
boost::match_default | boost::match_partial);
|
|
if (match && match_results[0].matched)
|
|
{
|
|
// Full match. We're done.
|
|
search_position_ = match_results[0].second - begin;
|
|
bytes_to_read = 0;
|
|
}
|
|
|
|
// No match yet. Check if buffer is full.
|
|
else if (streambuf_.size() == streambuf_.max_size())
|
|
{
|
|
search_position_ = not_found;
|
|
bytes_to_read = 0;
|
|
}
|
|
|
|
// Need to read some more data.
|
|
else
|
|
{
|
|
if (match)
|
|
{
|
|
// Partial match. Next search needs to start from beginning of
|
|
// match.
|
|
search_position_ = match_results[0].first - begin;
|
|
}
|
|
else
|
|
{
|
|
// Next search can start with the new data.
|
|
search_position_ = end - begin;
|
|
}
|
|
|
|
bytes_to_read = read_size_helper(streambuf_, 65536);
|
|
}
|
|
}
|
|
|
|
// Check if we're done.
|
|
if (!start && bytes_to_read == 0)
|
|
break;
|
|
|
|
// Start a new asynchronous read operation to obtain more data.
|
|
stream_.async_read_some(streambuf_.prepare(bytes_to_read),
|
|
BOOST_ASIO_MOVE_CAST(read_until_expr_op)(*this));
|
|
return; default:
|
|
streambuf_.commit(bytes_transferred);
|
|
if (ec || bytes_transferred == 0)
|
|
break;
|
|
}
|
|
|
|
const boost::system::error_code result_ec =
|
|
(search_position_ == not_found)
|
|
? error::not_found : ec;
|
|
|
|
const std::size_t result_n =
|
|
(ec || search_position_ == not_found)
|
|
? 0 : search_position_;
|
|
|
|
handler_(result_ec, result_n);
|
|
}
|
|
}
|
|
|
|
//private:
|
|
AsyncReadStream& stream_;
|
|
boost::asio::basic_streambuf<Allocator>& streambuf_;
|
|
RegEx expr_;
|
|
int start_;
|
|
std::size_t search_position_;
|
|
ReadHandler handler_;
|
|
};
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename RegEx, typename ReadHandler>
|
|
inline void* asio_handler_allocate(std::size_t size,
|
|
read_until_expr_op<AsyncReadStream,
|
|
Allocator, RegEx, ReadHandler>* this_handler)
|
|
{
|
|
return boost_asio_handler_alloc_helpers::allocate(
|
|
size, this_handler->handler_);
|
|
}
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename RegEx, typename ReadHandler>
|
|
inline void asio_handler_deallocate(void* pointer, std::size_t size,
|
|
read_until_expr_op<AsyncReadStream,
|
|
Allocator, RegEx, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_alloc_helpers::deallocate(
|
|
pointer, size, this_handler->handler_);
|
|
}
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename RegEx, typename ReadHandler>
|
|
inline bool asio_handler_is_continuation(
|
|
read_until_expr_op<AsyncReadStream,
|
|
Allocator, RegEx, ReadHandler>* this_handler)
|
|
{
|
|
return this_handler->start_ == 0 ? true
|
|
: boost_asio_handler_cont_helpers::is_continuation(
|
|
this_handler->handler_);
|
|
}
|
|
|
|
template <typename Function, typename AsyncReadStream, typename Allocator,
|
|
typename RegEx, typename ReadHandler>
|
|
inline void asio_handler_invoke(Function& function,
|
|
read_until_expr_op<AsyncReadStream,
|
|
Allocator, RegEx, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_invoke_helpers::invoke(
|
|
function, this_handler->handler_);
|
|
}
|
|
|
|
template <typename Function, typename AsyncReadStream, typename Allocator,
|
|
typename RegEx, typename ReadHandler>
|
|
inline void asio_handler_invoke(const Function& function,
|
|
read_until_expr_op<AsyncReadStream,
|
|
Allocator, RegEx, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_invoke_helpers::invoke(
|
|
function, this_handler->handler_);
|
|
}
|
|
} // namespace detail
|
|
|
|
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
|
|
BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))
|
|
async_read_until(AsyncReadStream& s,
|
|
boost::asio::basic_streambuf<Allocator>& b, const boost::regex& expr,
|
|
BOOST_ASIO_MOVE_ARG(ReadHandler) handler)
|
|
{
|
|
// If you get an error on the following line it means that your handler does
|
|
// not meet the documented type requirements for a ReadHandler.
|
|
BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
|
|
|
detail::async_result_init<
|
|
ReadHandler, void (boost::system::error_code, std::size_t)> init(
|
|
BOOST_ASIO_MOVE_CAST(ReadHandler)(handler));
|
|
|
|
detail::read_until_expr_op<AsyncReadStream, Allocator,
|
|
boost::regex, BOOST_ASIO_HANDLER_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))>(
|
|
s, b, expr, init.handler)(
|
|
boost::system::error_code(), 0, 1);
|
|
|
|
return init.result.get();
|
|
}
|
|
|
|
#endif // defined(BOOST_ASIO_HAS_BOOST_REGEX)
|
|
|
|
namespace detail
|
|
{
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
class read_until_match_op
|
|
{
|
|
public:
|
|
read_until_match_op(AsyncReadStream& stream,
|
|
boost::asio::basic_streambuf<Allocator>& streambuf,
|
|
MatchCondition match_condition, ReadHandler& handler)
|
|
: stream_(stream),
|
|
streambuf_(streambuf),
|
|
match_condition_(match_condition),
|
|
start_(0),
|
|
search_position_(0),
|
|
handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(handler))
|
|
{
|
|
}
|
|
|
|
#if defined(BOOST_ASIO_HAS_MOVE)
|
|
read_until_match_op(const read_until_match_op& other)
|
|
: stream_(other.stream_),
|
|
streambuf_(other.streambuf_),
|
|
match_condition_(other.match_condition_),
|
|
start_(other.start_),
|
|
search_position_(other.search_position_),
|
|
handler_(other.handler_)
|
|
{
|
|
}
|
|
|
|
read_until_match_op(read_until_match_op&& other)
|
|
: stream_(other.stream_),
|
|
streambuf_(other.streambuf_),
|
|
match_condition_(other.match_condition_),
|
|
start_(other.start_),
|
|
search_position_(other.search_position_),
|
|
handler_(BOOST_ASIO_MOVE_CAST(ReadHandler)(other.handler_))
|
|
{
|
|
}
|
|
#endif // defined(BOOST_ASIO_HAS_MOVE)
|
|
|
|
void operator()(const boost::system::error_code& ec,
|
|
std::size_t bytes_transferred, int start = 0)
|
|
{
|
|
const std::size_t not_found = (std::numeric_limits<std::size_t>::max)();
|
|
std::size_t bytes_to_read;
|
|
switch (start_ = start)
|
|
{
|
|
case 1:
|
|
for (;;)
|
|
{
|
|
{
|
|
// Determine the range of the data to be searched.
|
|
typedef typename boost::asio::basic_streambuf<
|
|
Allocator>::const_buffers_type const_buffers_type;
|
|
typedef boost::asio::buffers_iterator<const_buffers_type> iterator;
|
|
const_buffers_type buffers = streambuf_.data();
|
|
iterator begin = iterator::begin(buffers);
|
|
iterator start_pos = begin + search_position_;
|
|
iterator end = iterator::end(buffers);
|
|
|
|
// Look for a match.
|
|
std::pair<iterator, bool> result = match_condition_(start_pos, end);
|
|
if (result.second)
|
|
{
|
|
// Full match. We're done.
|
|
search_position_ = result.first - begin;
|
|
bytes_to_read = 0;
|
|
}
|
|
|
|
// No match yet. Check if buffer is full.
|
|
else if (streambuf_.size() == streambuf_.max_size())
|
|
{
|
|
search_position_ = not_found;
|
|
bytes_to_read = 0;
|
|
}
|
|
|
|
// Need to read some more data.
|
|
else
|
|
{
|
|
if (result.first != end)
|
|
{
|
|
// Partial match. Next search needs to start from beginning of
|
|
// match.
|
|
search_position_ = result.first - begin;
|
|
}
|
|
else
|
|
{
|
|
// Next search can start with the new data.
|
|
search_position_ = end - begin;
|
|
}
|
|
|
|
bytes_to_read = read_size_helper(streambuf_, 65536);
|
|
}
|
|
}
|
|
|
|
// Check if we're done.
|
|
if (!start && bytes_to_read == 0)
|
|
break;
|
|
|
|
// Start a new asynchronous read operation to obtain more data.
|
|
stream_.async_read_some(streambuf_.prepare(bytes_to_read),
|
|
BOOST_ASIO_MOVE_CAST(read_until_match_op)(*this));
|
|
return; default:
|
|
streambuf_.commit(bytes_transferred);
|
|
if (ec || bytes_transferred == 0)
|
|
break;
|
|
}
|
|
|
|
const boost::system::error_code result_ec =
|
|
(search_position_ == not_found)
|
|
? error::not_found : ec;
|
|
|
|
const std::size_t result_n =
|
|
(ec || search_position_ == not_found)
|
|
? 0 : search_position_;
|
|
|
|
handler_(result_ec, result_n);
|
|
}
|
|
}
|
|
|
|
//private:
|
|
AsyncReadStream& stream_;
|
|
boost::asio::basic_streambuf<Allocator>& streambuf_;
|
|
MatchCondition match_condition_;
|
|
int start_;
|
|
std::size_t search_position_;
|
|
ReadHandler handler_;
|
|
};
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
inline void* asio_handler_allocate(std::size_t size,
|
|
read_until_match_op<AsyncReadStream,
|
|
Allocator, MatchCondition, ReadHandler>* this_handler)
|
|
{
|
|
return boost_asio_handler_alloc_helpers::allocate(
|
|
size, this_handler->handler_);
|
|
}
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
inline void asio_handler_deallocate(void* pointer, std::size_t size,
|
|
read_until_match_op<AsyncReadStream,
|
|
Allocator, MatchCondition, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_alloc_helpers::deallocate(
|
|
pointer, size, this_handler->handler_);
|
|
}
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
inline bool asio_handler_is_continuation(
|
|
read_until_match_op<AsyncReadStream,
|
|
Allocator, MatchCondition, ReadHandler>* this_handler)
|
|
{
|
|
return this_handler->start_ == 0 ? true
|
|
: boost_asio_handler_cont_helpers::is_continuation(
|
|
this_handler->handler_);
|
|
}
|
|
|
|
template <typename Function, typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
inline void asio_handler_invoke(Function& function,
|
|
read_until_match_op<AsyncReadStream,
|
|
Allocator, MatchCondition, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_invoke_helpers::invoke(
|
|
function, this_handler->handler_);
|
|
}
|
|
|
|
template <typename Function, typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
inline void asio_handler_invoke(const Function& function,
|
|
read_until_match_op<AsyncReadStream,
|
|
Allocator, MatchCondition, ReadHandler>* this_handler)
|
|
{
|
|
boost_asio_handler_invoke_helpers::invoke(
|
|
function, this_handler->handler_);
|
|
}
|
|
} // namespace detail
|
|
|
|
template <typename AsyncReadStream, typename Allocator,
|
|
typename MatchCondition, typename ReadHandler>
|
|
BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))
|
|
async_read_until(AsyncReadStream& s,
|
|
boost::asio::basic_streambuf<Allocator>& b,
|
|
MatchCondition match_condition, BOOST_ASIO_MOVE_ARG(ReadHandler) handler,
|
|
typename enable_if<is_match_condition<MatchCondition>::value>::type*)
|
|
{
|
|
// If you get an error on the following line it means that your handler does
|
|
// not meet the documented type requirements for a ReadHandler.
|
|
BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
|
|
|
detail::async_result_init<
|
|
ReadHandler, void (boost::system::error_code, std::size_t)> init(
|
|
BOOST_ASIO_MOVE_CAST(ReadHandler)(handler));
|
|
|
|
detail::read_until_match_op<AsyncReadStream, Allocator,
|
|
MatchCondition, BOOST_ASIO_HANDLER_TYPE(ReadHandler,
|
|
void (boost::system::error_code, std::size_t))>(
|
|
s, b, match_condition, init.handler)(
|
|
boost::system::error_code(), 0, 1);
|
|
|
|
return init.result.get();
|
|
}
|
|
|
|
} // namespace asio
|
|
} // namespace boost
|
|
|
|
#include <boost/asio/detail/pop_options.hpp>
|
|
|
|
#endif // BOOST_ASIO_IMPL_READ_UNTIL_HPP
|