ecency-mobile/ios/Pods/boost-for-react-native/boost/asio/impl/read_until.hpp

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38 KiB
C++

//
// impl/read_until.hpp
// ~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2016 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_IMPL_READ_UNTIL_HPP
#define BOOST_ASIO_IMPL_READ_UNTIL_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <algorithm>
#include <string>
#include <vector>
#include <utility>
#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_cont_helpers.hpp>
#include <boost/asio/detail/handler_invoke_helpers.hpp>
#include <boost/asio/detail/handler_type_requirements.hpp>
#include <boost/asio/detail/limits.hpp>
#include <boost/asio/detail/throw_error.hpp>
#include <boost/asio/detail/push_options.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, "read_until");
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 search_position = 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_pos = begin + search_position;
iterator end = iterator::end(buffers);
// Look for a match.
iterator iter = std::find(start_pos, 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.
search_position = 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_to_read = read_size_helper(b, 65536);
b.commit(s.read_some(b.prepare(bytes_to_read), 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, "read_until");
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 search_position = 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_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)
{
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.
search_position = result.first - begin;
}
}
else
{
// No match. Next search can start with the new data.
search_position = 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_to_read = read_size_helper(b, 65536);
b.commit(s.read_some(b.prepare(bytes_to_read), ec));
if (ec)
return 0;
}
}
#if defined(BOOST_ASIO_HAS_BOOST_REGEX)
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, "read_until");
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 search_position = 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_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;
if (regex_search(start_pos, 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.
search_position = match_results[0].first - begin;
}
}
else
{
// No match. Next search can start with the new data.
search_position = 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_to_read = read_size_helper(b, 65536);
b.commit(s.read_some(b.prepare(bytes_to_read), ec));
if (ec)
return 0;
}
}
#endif // defined(BOOST_ASIO_HAS_BOOST_REGEX)
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 enable_if<is_match_condition<MatchCondition>::value>::type*)
{
std::size_t search_position = 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_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.
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.
search_position = result.first - begin;
}
else
{
// No match. Next search can start with the new data.
search_position = 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_to_read = read_size_helper(b, 65536);
b.commit(s.read_some(b.prepare(bytes_to_read), 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 enable_if<is_match_condition<MatchCondition>::value>::type*)
{
boost::system::error_code ec;
std::size_t bytes_transferred = read_until(s, b, match_condition, ec);
boost::asio::detail::throw_error(ec, "read_until");
return bytes_transferred;
}
namespace detail
{
template <typename AsyncReadStream, typename Allocator, typename ReadHandler>
class read_until_delim_op
{
public:
read_until_delim_op(AsyncReadStream& stream,
boost::asio::basic_streambuf<Allocator>& streambuf,
char 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_op(const read_until_delim_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_op(read_until_delim_op&& other)
: stream_(other.stream_),
streambuf_(other.streambuf_),
delim_(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.
iterator iter = std::find(start_pos, end, delim_);
if (iter != end)
{
// Found a match. We're done.
search_position_ = iter - begin + 1;
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
{
// 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_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_;
char 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_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_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_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_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_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, char 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_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