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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/asio/impl/read_until.ipp
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+//
+// read_until.ipp
+// ~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_READ_UNTIL_IPP
+#define BOOST_ASIO_READ_UNTIL_IPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/push_options.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <algorithm>
+#include <limits>
+#include <string>
+#include <utility>
+#include <boost/asio/detail/pop_options.hpp>
+
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/buffers_iterator.hpp>
+#include <boost/asio/detail/bind_handler.hpp>
+#include <boost/asio/detail/handler_alloc_helpers.hpp>
+#include <boost/asio/detail/handler_invoke_helpers.hpp>
+#include <boost/asio/detail/throw_error.hpp>
+
+namespace boost {
+namespace asio {
+
+template <typename SyncReadStream, typename Allocator>
+inline std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, char delim)
+{
+ boost::system::error_code ec;
+ std::size_t bytes_transferred = read_until(s, b, delim, ec);
+ boost::asio::detail::throw_error(ec);
+ return bytes_transferred;
+}
+
+template <typename SyncReadStream, typename Allocator>
+std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, char delim,
+ boost::system::error_code& ec)
+{
+ std::size_t next_search_start = 0;
+ 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator start = begin + next_search_start;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ iterator iter = std::find(start, end, delim);
+ if (iter != end)
+ {
+ // Found a match. We're done.
+ ec = boost::system::error_code();
+ return iter - begin + 1;
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ ec = error::not_found;
+ return 0;
+ }
+
+ // Need more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ b.commit(s.read_some(b.prepare(bytes_available), ec));
+ if (ec)
+ return 0;
+ }
+}
+
+template <typename SyncReadStream, typename Allocator>
+inline std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, const std::string& delim)
+{
+ boost::system::error_code ec;
+ std::size_t bytes_transferred = read_until(s, b, delim, ec);
+ boost::asio::detail::throw_error(ec);
+ return bytes_transferred;
+}
+
+namespace detail
+{
+ // Algorithm that finds a subsequence of equal values in a sequence. Returns
+ // (iterator,true) if a full match was found, in which case the iterator
+ // points to the beginning of the match. Returns (iterator,false) if a
+ // partial match was found at the end of the first sequence, in which case
+ // the iterator points to the beginning of the partial match. Returns
+ // (last1,false) if no full or partial match was found.
+ template <typename Iterator1, typename Iterator2>
+ std::pair<Iterator1, bool> partial_search(
+ Iterator1 first1, Iterator1 last1, Iterator2 first2, Iterator2 last2)
+ {
+ for (Iterator1 iter1 = first1; iter1 != last1; ++iter1)
+ {
+ Iterator1 test_iter1 = iter1;
+ Iterator2 test_iter2 = first2;
+ for (;; ++test_iter1, ++test_iter2)
+ {
+ if (test_iter2 == last2)
+ return std::make_pair(iter1, true);
+ if (test_iter1 == last1)
+ {
+ if (test_iter2 != first2)
+ return std::make_pair(iter1, false);
+ else
+ break;
+ }
+ if (*test_iter1 != *test_iter2)
+ break;
+ }
+ }
+ return std::make_pair(last1, false);
+ }
+} // namespace detail
+
+template <typename SyncReadStream, typename Allocator>
+std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, const std::string& delim,
+ boost::system::error_code& ec)
+{
+ std::size_t next_search_start = 0;
+ 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator start = begin + next_search_start;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::pair<iterator, bool> result = boost::asio::detail::partial_search(
+ start, end, delim.begin(), delim.end());
+ if (result.first != end)
+ {
+ if (result.second)
+ {
+ // Full match. We're done.
+ ec = boost::system::error_code();
+ return result.first - begin + delim.length();
+ }
+ else
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start = result.first - begin;
+ }
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ ec = error::not_found;
+ return 0;
+ }
+
+ // Need more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ b.commit(s.read_some(b.prepare(bytes_available), ec));
+ if (ec)
+ return 0;
+ }
+}
+
+template <typename SyncReadStream, typename Allocator>
+inline std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, const boost::regex& expr)
+{
+ boost::system::error_code ec;
+ std::size_t bytes_transferred = read_until(s, b, expr, ec);
+ boost::asio::detail::throw_error(ec);
+ return bytes_transferred;
+}
+
+template <typename SyncReadStream, typename Allocator>
+std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, const boost::regex& expr,
+ boost::system::error_code& ec)
+{
+ std::size_t next_search_start = 0;
+ 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator start = begin + next_search_start;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ boost::match_results<iterator> match_results;
+ if (boost::regex_search(start, end, match_results, expr,
+ boost::match_default | boost::match_partial))
+ {
+ if (match_results[0].matched)
+ {
+ // Full match. We're done.
+ ec = boost::system::error_code();
+ return match_results[0].second - begin;
+ }
+ else
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start = match_results[0].first - begin;
+ }
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ ec = error::not_found;
+ return 0;
+ }
+
+ // Need more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ b.commit(s.read_some(b.prepare(bytes_available), ec));
+ if (ec)
+ return 0;
+ }
+}
+
+template <typename SyncReadStream, typename Allocator, typename MatchCondition>
+std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b,
+ MatchCondition match_condition, boost::system::error_code& ec,
+ typename boost::enable_if<is_match_condition<MatchCondition> >::type*)
+{
+ std::size_t next_search_start = 0;
+ 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator start = begin + next_search_start;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::pair<iterator, bool> result = match_condition(start, end);
+ if (result.second)
+ {
+ // Full match. We're done.
+ ec = boost::system::error_code();
+ return result.first - begin;
+ }
+ else if (result.first != end)
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start = result.first - begin;
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ ec = error::not_found;
+ return 0;
+ }
+
+ // Need more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ b.commit(s.read_some(b.prepare(bytes_available), ec));
+ if (ec)
+ return 0;
+ }
+}
+
+template <typename SyncReadStream, typename Allocator, typename MatchCondition>
+inline std::size_t read_until(SyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, MatchCondition match_condition,
+ typename boost::enable_if<is_match_condition<MatchCondition> >::type*)
+{
+ boost::system::error_code ec;
+ std::size_t bytes_transferred = read_until(s, b, match_condition, ec);
+ boost::asio::detail::throw_error(ec);
+ return bytes_transferred;
+}
+
+namespace detail
+{
+ template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+ class read_until_delim_handler
+ {
+ public:
+ read_until_delim_handler(AsyncReadStream& stream,
+ boost::asio::basic_streambuf<Allocator>& streambuf, char delim,
+ std::size_t next_search_start, ReadHandler handler)
+ : stream_(stream),
+ streambuf_(streambuf),
+ delim_(delim),
+ next_search_start_(next_search_start),
+ handler_(handler)
+ {
+ }
+
+ void operator()(const boost::system::error_code& ec,
+ std::size_t bytes_transferred)
+ {
+ // Check for errors.
+ if (ec)
+ {
+ std::size_t bytes = 0;
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Commit received data to streambuf's get area.
+ streambuf_.commit(bytes_transferred);
+
+ // 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 = begin + next_search_start_;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ iterator iter = std::find(start, end, delim_);
+ if (iter != end)
+ {
+ // Found a match. We're done.
+ std::size_t bytes = iter - begin + 1;
+ handler_(ec, bytes);
+ return;
+ }
+
+ // No match. Check if buffer is full.
+ if (streambuf_.size() == streambuf_.max_size())
+ {
+ std::size_t bytes = 0;
+ boost::system::error_code ec(error::not_found);
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Next search can start with the new data.
+ next_search_start_ = end - begin;
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, streambuf_.max_size() - streambuf_.size());
+ stream_.async_read_some(streambuf_.prepare(bytes_available), *this);
+ }
+
+ //private:
+ AsyncReadStream& stream_;
+ boost::asio::basic_streambuf<Allocator>& streambuf_;
+ char delim_;
+ std::size_t next_search_start_;
+ ReadHandler handler_;
+ };
+
+ template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+ inline void* asio_handler_allocate(std::size_t size,
+ read_until_delim_handler<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_handler<AsyncReadStream,
+ Allocator, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_alloc_helpers::deallocate(
+ pointer, size, &this_handler->handler_);
+ }
+
+ template <typename Function, typename AsyncReadStream, typename Allocator,
+ typename ReadHandler>
+ inline void asio_handler_invoke(const Function& function,
+ read_until_delim_handler<AsyncReadStream,
+ Allocator, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_invoke_helpers::invoke(
+ function, &this_handler->handler_);
+ }
+} // namespace detail
+
+template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+void async_read_until(AsyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, char delim, ReadHandler handler)
+{
+ // 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ iterator iter = std::find(begin, end, delim);
+ if (iter != end)
+ {
+ // Found a match. We're done.
+ boost::system::error_code ec;
+ std::size_t bytes = iter - begin + 1;
+ s.get_io_service().post(detail::bind_handler(handler, ec, bytes));
+ return;
+ }
+
+ // No match. Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ boost::system::error_code ec(error::not_found);
+ s.get_io_service().post(detail::bind_handler(handler, ec, 0));
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ s.async_read_some(b.prepare(bytes_available),
+ detail::read_until_delim_handler<AsyncReadStream, Allocator, ReadHandler>(
+ s, b, delim, end - begin, handler));
+}
+
+namespace detail
+{
+ template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+ class read_until_delim_string_handler
+ {
+ public:
+ read_until_delim_string_handler(AsyncReadStream& stream,
+ boost::asio::basic_streambuf<Allocator>& streambuf,
+ const std::string& delim, std::size_t next_search_start,
+ ReadHandler handler)
+ : stream_(stream),
+ streambuf_(streambuf),
+ delim_(delim),
+ next_search_start_(next_search_start),
+ handler_(handler)
+ {
+ }
+
+ void operator()(const boost::system::error_code& ec,
+ std::size_t bytes_transferred)
+ {
+ // Check for errors.
+ if (ec)
+ {
+ std::size_t bytes = 0;
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Commit received data to streambuf's get area.
+ streambuf_.commit(bytes_transferred);
+
+ // 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 = begin + next_search_start_;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::pair<iterator, bool> result = boost::asio::detail::partial_search(
+ start, end, delim_.begin(), delim_.end());
+ if (result.first != end)
+ {
+ if (result.second)
+ {
+ // Full match. We're done.
+ std::size_t bytes = result.first - begin + delim_.length();
+ handler_(ec, bytes);
+ return;
+ }
+ else
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start_ = result.first - begin;
+ }
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start_ = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (streambuf_.size() == streambuf_.max_size())
+ {
+ std::size_t bytes = 0;
+ boost::system::error_code ec2(error::not_found);
+ handler_(ec2, bytes);
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, streambuf_.max_size() - streambuf_.size());
+ stream_.async_read_some(streambuf_.prepare(bytes_available), *this);
+ }
+
+ //private:
+ AsyncReadStream& stream_;
+ boost::asio::basic_streambuf<Allocator>& streambuf_;
+ std::string delim_;
+ std::size_t next_search_start_;
+ ReadHandler handler_;
+ };
+
+ template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+ inline void* asio_handler_allocate(std::size_t size,
+ read_until_delim_string_handler<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_handler<AsyncReadStream,
+ Allocator, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_alloc_helpers::deallocate(
+ pointer, size, &this_handler->handler_);
+ }
+
+ template <typename Function, typename AsyncReadStream,
+ typename Allocator, typename ReadHandler>
+ inline void asio_handler_invoke(const Function& function,
+ read_until_delim_string_handler<AsyncReadStream,
+ Allocator, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_invoke_helpers::invoke(
+ function, &this_handler->handler_);
+ }
+} // namespace detail
+
+template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+void async_read_until(AsyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, const std::string& delim,
+ ReadHandler handler)
+{
+ // 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::size_t next_search_start;
+ std::pair<iterator, bool> result = boost::asio::detail::partial_search(
+ begin, end, delim.begin(), delim.end());
+ if (result.first != end)
+ {
+ if (result.second)
+ {
+ // Full match. We're done.
+ boost::system::error_code ec;
+ std::size_t bytes = result.first - begin + delim.length();
+ s.get_io_service().post(detail::bind_handler(handler, ec, bytes));
+ return;
+ }
+ else
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start = result.first - begin;
+ }
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ boost::system::error_code ec(error::not_found);
+ s.get_io_service().post(detail::bind_handler(handler, ec, 0));
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ s.async_read_some(b.prepare(bytes_available),
+ detail::read_until_delim_string_handler<
+ AsyncReadStream, Allocator, ReadHandler>(
+ s, b, delim, next_search_start, handler));
+}
+
+namespace detail
+{
+ template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+ class read_until_expr_handler
+ {
+ public:
+ read_until_expr_handler(AsyncReadStream& stream,
+ boost::asio::basic_streambuf<Allocator>& streambuf,
+ const boost::regex& expr, std::size_t next_search_start,
+ ReadHandler handler)
+ : stream_(stream),
+ streambuf_(streambuf),
+ expr_(expr),
+ next_search_start_(next_search_start),
+ handler_(handler)
+ {
+ }
+
+ void operator()(const boost::system::error_code& ec,
+ std::size_t bytes_transferred)
+ {
+ // Check for errors.
+ if (ec)
+ {
+ std::size_t bytes = 0;
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Commit received data to streambuf's get area.
+ streambuf_.commit(bytes_transferred);
+
+ // 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 = begin + next_search_start_;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ boost::match_results<iterator> match_results;
+ if (boost::regex_search(start, end, match_results, expr_,
+ boost::match_default | boost::match_partial))
+ {
+ if (match_results[0].matched)
+ {
+ // Full match. We're done.
+ std::size_t bytes = match_results[0].second - begin;
+ handler_(ec, bytes);
+ return;
+ }
+ else
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start_ = match_results[0].first - begin;
+ }
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start_ = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (streambuf_.size() == streambuf_.max_size())
+ {
+ std::size_t bytes = 0;
+ boost::system::error_code ec(error::not_found);
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, streambuf_.max_size() - streambuf_.size());
+ stream_.async_read_some(streambuf_.prepare(bytes_available), *this);
+ }
+
+ //private:
+ AsyncReadStream& stream_;
+ boost::asio::basic_streambuf<Allocator>& streambuf_;
+ boost::regex expr_;
+ std::size_t next_search_start_;
+ ReadHandler handler_;
+ };
+
+ template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+ inline void* asio_handler_allocate(std::size_t size,
+ read_until_expr_handler<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_expr_handler<AsyncReadStream,
+ Allocator, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_alloc_helpers::deallocate(
+ pointer, size, &this_handler->handler_);
+ }
+
+ template <typename Function, typename AsyncReadStream, typename Allocator,
+ typename ReadHandler>
+ inline void asio_handler_invoke(const Function& function,
+ read_until_expr_handler<AsyncReadStream,
+ Allocator, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_invoke_helpers::invoke(
+ function, &this_handler->handler_);
+ }
+} // namespace detail
+
+template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
+void async_read_until(AsyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b, const boost::regex& expr,
+ ReadHandler handler)
+{
+ // 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::size_t next_search_start;
+ boost::match_results<iterator> match_results;
+ if (boost::regex_search(begin, end, match_results, expr,
+ boost::match_default | boost::match_partial))
+ {
+ if (match_results[0].matched)
+ {
+ // Full match. We're done.
+ boost::system::error_code ec;
+ std::size_t bytes = match_results[0].second - begin;
+ s.get_io_service().post(detail::bind_handler(handler, ec, bytes));
+ return;
+ }
+ else
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start = match_results[0].first - begin;
+ }
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ boost::system::error_code ec(error::not_found);
+ s.get_io_service().post(detail::bind_handler(handler, ec, 0));
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ s.async_read_some(b.prepare(bytes_available),
+ detail::read_until_expr_handler<AsyncReadStream, Allocator, ReadHandler>(
+ s, b, expr, next_search_start, handler));
+}
+
+namespace detail
+{
+ template <typename AsyncReadStream, typename Allocator,
+ typename MatchCondition, typename ReadHandler>
+ class read_until_match_handler
+ {
+ public:
+ read_until_match_handler(AsyncReadStream& stream,
+ boost::asio::basic_streambuf<Allocator>& streambuf,
+ MatchCondition match_condition, std::size_t next_search_start,
+ ReadHandler handler)
+ : stream_(stream),
+ streambuf_(streambuf),
+ match_condition_(match_condition),
+ next_search_start_(next_search_start),
+ handler_(handler)
+ {
+ }
+
+ void operator()(const boost::system::error_code& ec,
+ std::size_t bytes_transferred)
+ {
+ // Check for errors.
+ if (ec)
+ {
+ std::size_t bytes = 0;
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Commit received data to streambuf's get area.
+ streambuf_.commit(bytes_transferred);
+
+ // 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 = begin + next_search_start_;
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::pair<iterator, bool> result = match_condition_(start, end);
+ if (result.second)
+ {
+ // Full match. We're done.
+ std::size_t bytes = result.first - begin;
+ handler_(ec, bytes);
+ return;
+ }
+ else if (result.first != end)
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start_ = result.first - begin;
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start_ = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (streambuf_.size() == streambuf_.max_size())
+ {
+ std::size_t bytes = 0;
+ boost::system::error_code ec(error::not_found);
+ handler_(ec, bytes);
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, streambuf_.max_size() - streambuf_.size());
+ stream_.async_read_some(streambuf_.prepare(bytes_available), *this);
+ }
+
+ //private:
+ AsyncReadStream& stream_;
+ boost::asio::basic_streambuf<Allocator>& streambuf_;
+ MatchCondition match_condition_;
+ std::size_t next_search_start_;
+ ReadHandler handler_;
+ };
+
+ template <typename AsyncReadStream, typename Allocator,
+ typename MatchCondition, typename ReadHandler>
+ inline void* asio_handler_allocate(std::size_t size,
+ read_until_match_handler<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_handler<AsyncReadStream,
+ Allocator, MatchCondition, ReadHandler>* this_handler)
+ {
+ boost_asio_handler_alloc_helpers::deallocate(
+ pointer, size, &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_handler<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>
+void async_read_until(AsyncReadStream& s,
+ boost::asio::basic_streambuf<Allocator>& b,
+ MatchCondition match_condition, ReadHandler handler,
+ typename boost::enable_if<is_match_condition<MatchCondition> >::type*)
+{
+ // 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 = b.data();
+ iterator begin = iterator::begin(buffers);
+ iterator end = iterator::end(buffers);
+
+ // Look for a match.
+ std::size_t next_search_start;
+ std::pair<iterator, bool> result = match_condition(begin, end);
+ if (result.second)
+ {
+ // Full match. We're done.
+ boost::system::error_code ec;
+ std::size_t bytes = result.first - begin;
+ s.get_io_service().post(detail::bind_handler(handler, ec, bytes));
+ return;
+ }
+ else if (result.first != end)
+ {
+ // Partial match. Next search needs to start from beginning of match.
+ next_search_start = result.first - begin;
+ }
+ else
+ {
+ // No match. Next search can start with the new data.
+ next_search_start = end - begin;
+ }
+
+ // Check if buffer is full.
+ if (b.size() == b.max_size())
+ {
+ boost::system::error_code ec(error::not_found);
+ s.get_io_service().post(detail::bind_handler(handler, ec, 0));
+ return;
+ }
+
+ // Start a new asynchronous read operation to obtain more data.
+ std::size_t bytes_available =
+ std::min<std::size_t>(512, b.max_size() - b.size());
+ s.async_read_some(b.prepare(bytes_available),
+ detail::read_until_match_handler<
+ AsyncReadStream, Allocator, MatchCondition, ReadHandler>(
+ s, b, match_condition, next_search_start, handler));
+}
+
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_READ_UNTIL_IPP