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Diffstat (limited to 'lib/asio/impl/read_until.hpp')
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1 files changed, 1500 insertions, 0 deletions
diff --git a/lib/asio/impl/read_until.hpp b/lib/asio/impl/read_until.hpp new file mode 100644 index 0000000..1f39e19 --- /dev/null +++ b/lib/asio/impl/read_until.hpp @@ -0,0 +1,1500 @@ +// +// impl/read_until.hpp +// ~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2018 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 ASIO_IMPL_READ_UNTIL_HPP +#define 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 "asio/associated_allocator.hpp" +#include "asio/associated_executor.hpp" +#include "asio/buffer.hpp" +#include "asio/buffers_iterator.hpp" +#include "asio/detail/bind_handler.hpp" +#include "asio/detail/handler_alloc_helpers.hpp" +#include "asio/detail/handler_cont_helpers.hpp" +#include "asio/detail/handler_invoke_helpers.hpp" +#include "asio/detail/handler_type_requirements.hpp" +#include "asio/detail/limits.hpp" +#include "asio/detail/throw_error.hpp" + +#include "asio/detail/push_options.hpp" + +namespace asio { + +template <typename SyncReadStream, typename DynamicBuffer> +inline std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, char delim) +{ + asio::error_code ec; + std::size_t bytes_transferred = read_until(s, + ASIO_MOVE_CAST(DynamicBuffer)(buffers), delim, ec); + asio::detail::throw_error(ec, "read_until"); + return bytes_transferred; +} + +template <typename SyncReadStream, typename DynamicBuffer> +std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + char delim, asio::error_code& ec) +{ + typename decay<DynamicBuffer>::type b( + ASIO_MOVE_CAST(DynamicBuffer)(buffers)); + + std::size_t search_position = 0; + for (;;) + { + // Determine the range of the data to be searched. + typedef typename DynamicBuffer::const_buffers_type buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = b.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position; + iterator end = iterator::end(data_buffers); + + // Look for a match. + iterator iter = std::find(start_pos, end, delim); + if (iter != end) + { + // Found a match. We're done. + ec = asio::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 = std::min<std::size_t>( + std::max<std::size_t>(512, b.capacity() - b.size()), + std::min<std::size_t>(65536, b.max_size() - b.size())); + b.commit(s.read_some(b.prepare(bytes_to_read), ec)); + if (ec) + return 0; + } +} + +template <typename SyncReadStream, typename DynamicBuffer> +inline std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + ASIO_STRING_VIEW_PARAM delim) +{ + asio::error_code ec; + std::size_t bytes_transferred = read_until(s, + ASIO_MOVE_CAST(DynamicBuffer)(buffers), delim, ec); + 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 DynamicBuffer> +std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + ASIO_STRING_VIEW_PARAM delim, asio::error_code& ec) +{ + typename decay<DynamicBuffer>::type b( + ASIO_MOVE_CAST(DynamicBuffer)(buffers)); + + std::size_t search_position = 0; + for (;;) + { + // Determine the range of the data to be searched. + typedef typename DynamicBuffer::const_buffers_type buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = b.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position; + iterator end = iterator::end(data_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 = asio::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 = std::min<std::size_t>( + std::max<std::size_t>(512, b.capacity() - b.size()), + std::min<std::size_t>(65536, b.max_size() - b.size())); + b.commit(s.read_some(b.prepare(bytes_to_read), ec)); + if (ec) + return 0; + } +} + +#if !defined(ASIO_NO_EXTENSIONS) +#if defined(ASIO_HAS_BOOST_REGEX) + +template <typename SyncReadStream, typename DynamicBuffer> +inline std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + const boost::regex& expr) +{ + asio::error_code ec; + std::size_t bytes_transferred = read_until(s, + ASIO_MOVE_CAST(DynamicBuffer)(buffers), expr, ec); + asio::detail::throw_error(ec, "read_until"); + return bytes_transferred; +} + +template <typename SyncReadStream, typename DynamicBuffer> +std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + const boost::regex& expr, asio::error_code& ec) +{ + typename decay<DynamicBuffer>::type b( + ASIO_MOVE_CAST(DynamicBuffer)(buffers)); + + std::size_t search_position = 0; + for (;;) + { + // Determine the range of the data to be searched. + typedef typename DynamicBuffer::const_buffers_type buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = b.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position; + iterator end = iterator::end(data_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 = asio::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(ASIO_HAS_BOOST_REGEX) + +template <typename SyncReadStream, + typename DynamicBuffer, typename MatchCondition> +inline std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + MatchCondition match_condition, + typename enable_if<is_match_condition<MatchCondition>::value>::type*) +{ + asio::error_code ec; + std::size_t bytes_transferred = read_until(s, + ASIO_MOVE_CAST(DynamicBuffer)(buffers), + match_condition, ec); + asio::detail::throw_error(ec, "read_until"); + return bytes_transferred; +} + +template <typename SyncReadStream, + typename DynamicBuffer, typename MatchCondition> +std::size_t read_until(SyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + MatchCondition match_condition, asio::error_code& ec, + typename enable_if<is_match_condition<MatchCondition>::value>::type*) +{ + typename decay<DynamicBuffer>::type b( + ASIO_MOVE_CAST(DynamicBuffer)(buffers)); + + std::size_t search_position = 0; + for (;;) + { + // Determine the range of the data to be searched. + typedef typename DynamicBuffer::const_buffers_type buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = b.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position; + iterator end = iterator::end(data_buffers); + + // Look for a match. + std::pair<iterator, bool> result = match_condition(start_pos, end); + if (result.second) + { + // Full match. We're done. + ec = asio::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 = std::min<std::size_t>( + std::max<std::size_t>(512, b.capacity() - b.size()), + std::min<std::size_t>(65536, b.max_size() - b.size())); + b.commit(s.read_some(b.prepare(bytes_to_read), ec)); + if (ec) + return 0; + } +} + +#if !defined(ASIO_NO_IOSTREAM) + +template <typename SyncReadStream, typename Allocator> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, char delim) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), delim); +} + +template <typename SyncReadStream, typename Allocator> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, char delim, + asio::error_code& ec) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), delim, ec); +} + +template <typename SyncReadStream, typename Allocator> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, + ASIO_STRING_VIEW_PARAM delim) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), delim); +} + +template <typename SyncReadStream, typename Allocator> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, + ASIO_STRING_VIEW_PARAM delim, asio::error_code& ec) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), delim, ec); +} + +#if defined(ASIO_HAS_BOOST_REGEX) + +template <typename SyncReadStream, typename Allocator> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, const boost::regex& expr) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), expr); +} + +template <typename SyncReadStream, typename Allocator> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, const boost::regex& expr, + asio::error_code& ec) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), expr, ec); +} + +#endif // defined(ASIO_HAS_BOOST_REGEX) + +template <typename SyncReadStream, typename Allocator, typename MatchCondition> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, MatchCondition match_condition, + typename enable_if<is_match_condition<MatchCondition>::value>::type*) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), match_condition); +} + +template <typename SyncReadStream, typename Allocator, typename MatchCondition> +inline std::size_t read_until(SyncReadStream& s, + asio::basic_streambuf<Allocator>& b, + MatchCondition match_condition, asio::error_code& ec, + typename enable_if<is_match_condition<MatchCondition>::value>::type*) +{ + return read_until(s, basic_streambuf_ref<Allocator>(b), match_condition, ec); +} + +#endif // !defined(ASIO_NO_IOSTREAM) +#endif // !defined(ASIO_NO_EXTENSIONS) + +namespace detail +{ + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + class read_until_delim_op + { + public: + template <typename BufferSequence> + read_until_delim_op(AsyncReadStream& stream, + ASIO_MOVE_ARG(BufferSequence) buffers, + char delim, ReadHandler& handler) + : stream_(stream), + buffers_(ASIO_MOVE_CAST(BufferSequence)(buffers)), + delim_(delim), + start_(0), + search_position_(0), + handler_(ASIO_MOVE_CAST(ReadHandler)(handler)) + { + } + +#if defined(ASIO_HAS_MOVE) + read_until_delim_op(const read_until_delim_op& other) + : stream_(other.stream_), + buffers_(other.buffers_), + 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_), + buffers_(ASIO_MOVE_CAST(DynamicBuffer)(other.buffers_)), + delim_(other.delim_), + start_(other.start_), + search_position_(other.search_position_), + handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_)) + { + } +#endif // defined(ASIO_HAS_MOVE) + + void operator()(const asio::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 DynamicBuffer::const_buffers_type + buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = buffers_.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position_; + iterator end = iterator::end(data_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 (buffers_.size() == buffers_.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 = std::min<std::size_t>( + std::max<std::size_t>(512, + buffers_.capacity() - buffers_.size()), + std::min<std::size_t>(65536, + buffers_.max_size() - buffers_.size())); + } + } + + // 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(buffers_.prepare(bytes_to_read), + ASIO_MOVE_CAST(read_until_delim_op)(*this)); + return; default: + buffers_.commit(bytes_transferred); + if (ec || bytes_transferred == 0) + break; + } + + const asio::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_; + DynamicBuffer buffers_; + char delim_; + int start_; + std::size_t search_position_; + ReadHandler handler_; + }; + + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void* asio_handler_allocate(std::size_t size, + read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + return asio_handler_alloc_helpers::allocate( + size, this_handler->handler_); + } + + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void asio_handler_deallocate(void* pointer, std::size_t size, + read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + asio_handler_alloc_helpers::deallocate( + pointer, size, this_handler->handler_); + } + + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline bool asio_handler_is_continuation( + read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + return this_handler->start_ == 0 ? true + : asio_handler_cont_helpers::is_continuation( + this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void asio_handler_invoke(Function& function, + read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void asio_handler_invoke(const Function& function, + read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } +} // namespace detail + +#if !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, typename DynamicBuffer, + typename ReadHandler, typename Allocator> +struct associated_allocator< + detail::read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>, + Allocator> +{ + typedef typename associated_allocator<ReadHandler, Allocator>::type type; + + static type get( + const detail::read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>& h, + const Allocator& a = Allocator()) ASIO_NOEXCEPT + { + return associated_allocator<ReadHandler, Allocator>::get(h.handler_, a); + } +}; + +template <typename AsyncReadStream, typename DynamicBuffer, + typename ReadHandler, typename Executor> +struct associated_executor< + detail::read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>, + Executor> +{ + typedef typename associated_executor<ReadHandler, Executor>::type type; + + static type get( + const detail::read_until_delim_op<AsyncReadStream, + DynamicBuffer, ReadHandler>& h, + const Executor& ex = Executor()) ASIO_NOEXCEPT + { + return associated_executor<ReadHandler, Executor>::get(h.handler_, ex); + } +}; + +#endif // !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> +ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + char delim, 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. + ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check; + + async_completion<ReadHandler, + void (asio::error_code, std::size_t)> init(handler); + + detail::read_until_delim_op<AsyncReadStream, + typename decay<DynamicBuffer>::type, + ASIO_HANDLER_TYPE(ReadHandler, + void (asio::error_code, std::size_t))>( + s, ASIO_MOVE_CAST(DynamicBuffer)(buffers), + delim, init.completion_handler)(asio::error_code(), 0, 1); + + return init.result.get(); +} + +namespace detail +{ + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + class read_until_delim_string_op + { + public: + template <typename BufferSequence> + read_until_delim_string_op(AsyncReadStream& stream, + ASIO_MOVE_ARG(BufferSequence) buffers, + const std::string& delim, ReadHandler& handler) + : stream_(stream), + buffers_(ASIO_MOVE_CAST(BufferSequence)(buffers)), + delim_(delim), + start_(0), + search_position_(0), + handler_(ASIO_MOVE_CAST(ReadHandler)(handler)) + { + } + +#if defined(ASIO_HAS_MOVE) + read_until_delim_string_op(const read_until_delim_string_op& other) + : stream_(other.stream_), + buffers_(other.buffers_), + 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_), + buffers_(ASIO_MOVE_CAST(DynamicBuffer)(other.buffers_)), + delim_(ASIO_MOVE_CAST(std::string)(other.delim_)), + start_(other.start_), + search_position_(other.search_position_), + handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_)) + { + } +#endif // defined(ASIO_HAS_MOVE) + + void operator()(const asio::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 DynamicBuffer::const_buffers_type + buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = buffers_.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position_; + iterator end = iterator::end(data_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 (buffers_.size() == buffers_.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 = std::min<std::size_t>( + std::max<std::size_t>(512, + buffers_.capacity() - buffers_.size()), + std::min<std::size_t>(65536, + buffers_.max_size() - buffers_.size())); + } + } + + // 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(buffers_.prepare(bytes_to_read), + ASIO_MOVE_CAST(read_until_delim_string_op)(*this)); + return; default: + buffers_.commit(bytes_transferred); + if (ec || bytes_transferred == 0) + break; + } + + const asio::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_; + DynamicBuffer buffers_; + std::string delim_; + int start_; + std::size_t search_position_; + ReadHandler handler_; + }; + + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void* asio_handler_allocate(std::size_t size, + read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + return asio_handler_alloc_helpers::allocate( + size, this_handler->handler_); + } + + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void asio_handler_deallocate(void* pointer, std::size_t size, + read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + asio_handler_alloc_helpers::deallocate( + pointer, size, this_handler->handler_); + } + + template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline bool asio_handler_is_continuation( + read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + return this_handler->start_ == 0 ? true + : asio_handler_cont_helpers::is_continuation( + this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void asio_handler_invoke(Function& function, + read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> + inline void asio_handler_invoke(const Function& function, + read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } +} // namespace detail + +#if !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, typename DynamicBuffer, + typename ReadHandler, typename Allocator> +struct associated_allocator< + detail::read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>, + Allocator> +{ + typedef typename associated_allocator<ReadHandler, Allocator>::type type; + + static type get( + const detail::read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>& h, + const Allocator& a = Allocator()) ASIO_NOEXCEPT + { + return associated_allocator<ReadHandler, Allocator>::get(h.handler_, a); + } +}; + +template <typename AsyncReadStream, typename DynamicBuffer, + typename ReadHandler, typename Executor> +struct associated_executor< + detail::read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>, + Executor> +{ + typedef typename associated_executor<ReadHandler, Executor>::type type; + + static type get( + const detail::read_until_delim_string_op<AsyncReadStream, + DynamicBuffer, ReadHandler>& h, + const Executor& ex = Executor()) ASIO_NOEXCEPT + { + return associated_executor<ReadHandler, Executor>::get(h.handler_, ex); + } +}; + +#endif // !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> +ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + ASIO_STRING_VIEW_PARAM delim, + 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. + ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check; + + async_completion<ReadHandler, + void (asio::error_code, std::size_t)> init(handler); + + detail::read_until_delim_string_op<AsyncReadStream, + typename decay<DynamicBuffer>::type, + ASIO_HANDLER_TYPE(ReadHandler, + void (asio::error_code, std::size_t))>( + s, ASIO_MOVE_CAST(DynamicBuffer)(buffers), + static_cast<std::string>(delim), + init.completion_handler)(asio::error_code(), 0, 1); + + return init.result.get(); +} + +#if !defined(ASIO_NO_EXTENSIONS) +#if defined(ASIO_HAS_BOOST_REGEX) + +namespace detail +{ + template <typename AsyncReadStream, typename DynamicBuffer, + typename RegEx, typename ReadHandler> + class read_until_expr_op + { + public: + template <typename BufferSequence> + read_until_expr_op(AsyncReadStream& stream, + ASIO_MOVE_ARG(BufferSequence) buffers, + const boost::regex& expr, ReadHandler& handler) + : stream_(stream), + buffers_(ASIO_MOVE_CAST(BufferSequence)(buffers)), + expr_(expr), + start_(0), + search_position_(0), + handler_(ASIO_MOVE_CAST(ReadHandler)(handler)) + { + } + +#if defined(ASIO_HAS_MOVE) + read_until_expr_op(const read_until_expr_op& other) + : stream_(other.stream_), + buffers_(other.buffers_), + 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_), + buffers_(ASIO_MOVE_CAST(DynamicBuffer)(other.buffers_)), + expr_(other.expr_), + start_(other.start_), + search_position_(other.search_position_), + handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_)) + { + } +#endif // defined(ASIO_HAS_MOVE) + + void operator()(const asio::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 DynamicBuffer::const_buffers_type + buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = buffers_.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position_; + iterator end = iterator::end(data_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 (buffers_.size() == buffers_.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 = std::min<std::size_t>( + std::max<std::size_t>(512, + buffers_.capacity() - buffers_.size()), + std::min<std::size_t>(65536, + buffers_.max_size() - buffers_.size())); + } + } + + // 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(buffers_.prepare(bytes_to_read), + ASIO_MOVE_CAST(read_until_expr_op)(*this)); + return; default: + buffers_.commit(bytes_transferred); + if (ec || bytes_transferred == 0) + break; + } + + const asio::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_; + DynamicBuffer buffers_; + RegEx expr_; + int start_; + std::size_t search_position_; + ReadHandler handler_; + }; + + template <typename AsyncReadStream, typename DynamicBuffer, + typename RegEx, typename ReadHandler> + inline void* asio_handler_allocate(std::size_t size, + read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>* this_handler) + { + return asio_handler_alloc_helpers::allocate( + size, this_handler->handler_); + } + + template <typename AsyncReadStream, typename DynamicBuffer, + typename RegEx, typename ReadHandler> + inline void asio_handler_deallocate(void* pointer, std::size_t size, + read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>* this_handler) + { + asio_handler_alloc_helpers::deallocate( + pointer, size, this_handler->handler_); + } + + template <typename AsyncReadStream, typename DynamicBuffer, + typename RegEx, typename ReadHandler> + inline bool asio_handler_is_continuation( + read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>* this_handler) + { + return this_handler->start_ == 0 ? true + : asio_handler_cont_helpers::is_continuation( + this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename RegEx, typename ReadHandler> + inline void asio_handler_invoke(Function& function, + read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename RegEx, typename ReadHandler> + inline void asio_handler_invoke(const Function& function, + read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } +} // namespace detail + +#if !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, typename DynamicBuffer, + typename RegEx, typename ReadHandler, typename Allocator> +struct associated_allocator< + detail::read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>, + Allocator> +{ + typedef typename associated_allocator<ReadHandler, Allocator>::type type; + + static type get( + const detail::read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>& h, + const Allocator& a = Allocator()) ASIO_NOEXCEPT + { + return associated_allocator<ReadHandler, Allocator>::get(h.handler_, a); + } +}; + +template <typename AsyncReadStream, typename DynamicBuffer, + typename RegEx, typename ReadHandler, typename Executor> +struct associated_executor< + detail::read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>, + Executor> +{ + typedef typename associated_executor<ReadHandler, Executor>::type type; + + static type get( + const detail::read_until_expr_op<AsyncReadStream, + DynamicBuffer, RegEx, ReadHandler>& h, + const Executor& ex = Executor()) ASIO_NOEXCEPT + { + return associated_executor<ReadHandler, Executor>::get(h.handler_, ex); + } +}; + +#endif // !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, + typename DynamicBuffer, typename ReadHandler> +ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + const boost::regex& expr, + 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. + ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check; + + async_completion<ReadHandler, + void (asio::error_code, std::size_t)> init(handler); + + detail::read_until_expr_op<AsyncReadStream, + typename decay<DynamicBuffer>::type, + boost::regex, ASIO_HANDLER_TYPE(ReadHandler, + void (asio::error_code, std::size_t))>( + s, ASIO_MOVE_CAST(DynamicBuffer)(buffers), + expr, init.completion_handler)(asio::error_code(), 0, 1); + + return init.result.get(); +} + +#endif // defined(ASIO_HAS_BOOST_REGEX) + +namespace detail +{ + template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler> + class read_until_match_op + { + public: + template <typename BufferSequence> + read_until_match_op(AsyncReadStream& stream, + ASIO_MOVE_ARG(BufferSequence) buffers, + MatchCondition match_condition, ReadHandler& handler) + : stream_(stream), + buffers_(ASIO_MOVE_CAST(BufferSequence)(buffers)), + match_condition_(match_condition), + start_(0), + search_position_(0), + handler_(ASIO_MOVE_CAST(ReadHandler)(handler)) + { + } + +#if defined(ASIO_HAS_MOVE) + read_until_match_op(const read_until_match_op& other) + : stream_(other.stream_), + buffers_(other.buffers_), + 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_), + buffers_(ASIO_MOVE_CAST(DynamicBuffer)(other.buffers_)), + match_condition_(other.match_condition_), + start_(other.start_), + search_position_(other.search_position_), + handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_)) + { + } +#endif // defined(ASIO_HAS_MOVE) + + void operator()(const asio::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 DynamicBuffer::const_buffers_type + buffers_type; + typedef buffers_iterator<buffers_type> iterator; + buffers_type data_buffers = buffers_.data(); + iterator begin = iterator::begin(data_buffers); + iterator start_pos = begin + search_position_; + iterator end = iterator::end(data_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 (buffers_.size() == buffers_.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 = std::min<std::size_t>( + std::max<std::size_t>(512, + buffers_.capacity() - buffers_.size()), + std::min<std::size_t>(65536, + buffers_.max_size() - buffers_.size())); + } + } + + // 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(buffers_.prepare(bytes_to_read), + ASIO_MOVE_CAST(read_until_match_op)(*this)); + return; default: + buffers_.commit(bytes_transferred); + if (ec || bytes_transferred == 0) + break; + } + + const asio::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_; + DynamicBuffer buffers_; + MatchCondition match_condition_; + int start_; + std::size_t search_position_; + ReadHandler handler_; + }; + + template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler> + inline void* asio_handler_allocate(std::size_t size, + read_until_match_op<AsyncReadStream, DynamicBuffer, + MatchCondition, ReadHandler>* this_handler) + { + return asio_handler_alloc_helpers::allocate( + size, this_handler->handler_); + } + + template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler> + inline void asio_handler_deallocate(void* pointer, std::size_t size, + read_until_match_op<AsyncReadStream, DynamicBuffer, + MatchCondition, ReadHandler>* this_handler) + { + asio_handler_alloc_helpers::deallocate( + pointer, size, this_handler->handler_); + } + + template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler> + inline bool asio_handler_is_continuation( + read_until_match_op<AsyncReadStream, DynamicBuffer, + MatchCondition, ReadHandler>* this_handler) + { + return this_handler->start_ == 0 ? true + : asio_handler_cont_helpers::is_continuation( + this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename MatchCondition, + typename ReadHandler> + inline void asio_handler_invoke(Function& function, + read_until_match_op<AsyncReadStream, DynamicBuffer, + MatchCondition, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } + + template <typename Function, typename AsyncReadStream, + typename DynamicBuffer, typename MatchCondition, + typename ReadHandler> + inline void asio_handler_invoke(const Function& function, + read_until_match_op<AsyncReadStream, DynamicBuffer, + MatchCondition, ReadHandler>* this_handler) + { + asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } +} // namespace detail + +#if !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler, typename Allocator> +struct associated_allocator< + detail::read_until_match_op<AsyncReadStream, + DynamicBuffer, MatchCondition, ReadHandler>, + Allocator> +{ + typedef typename associated_allocator<ReadHandler, Allocator>::type type; + + static type get( + const detail::read_until_match_op<AsyncReadStream, + DynamicBuffer, MatchCondition, ReadHandler>& h, + const Allocator& a = Allocator()) ASIO_NOEXCEPT + { + return associated_allocator<ReadHandler, Allocator>::get(h.handler_, a); + } +}; + +template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler, typename Executor> +struct associated_executor< + detail::read_until_match_op<AsyncReadStream, + DynamicBuffer, MatchCondition, ReadHandler>, + Executor> +{ + typedef typename associated_executor<ReadHandler, Executor>::type type; + + static type get( + const detail::read_until_match_op<AsyncReadStream, + DynamicBuffer, MatchCondition, ReadHandler>& h, + const Executor& ex = Executor()) ASIO_NOEXCEPT + { + return associated_executor<ReadHandler, Executor>::get(h.handler_, ex); + } +}; + +#endif // !defined(GENERATING_DOCUMENTATION) + +template <typename AsyncReadStream, typename DynamicBuffer, + typename MatchCondition, typename ReadHandler> +ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + ASIO_MOVE_ARG(DynamicBuffer) buffers, + MatchCondition match_condition, 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. + ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check; + + async_completion<ReadHandler, + void (asio::error_code, std::size_t)> init(handler); + + detail::read_until_match_op<AsyncReadStream, + typename decay<DynamicBuffer>::type, + MatchCondition, ASIO_HANDLER_TYPE(ReadHandler, + void (asio::error_code, std::size_t))>( + s, ASIO_MOVE_CAST(DynamicBuffer)(buffers), + match_condition, init.completion_handler)( + asio::error_code(), 0, 1); + + return init.result.get(); +} + +#if !defined(ASIO_NO_IOSTREAM) + +template <typename AsyncReadStream, typename Allocator, typename ReadHandler> +inline ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + asio::basic_streambuf<Allocator>& b, + char delim, ASIO_MOVE_ARG(ReadHandler) handler) +{ + return async_read_until(s, basic_streambuf_ref<Allocator>(b), + delim, ASIO_MOVE_CAST(ReadHandler)(handler)); +} + +template <typename AsyncReadStream, typename Allocator, typename ReadHandler> +inline ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + asio::basic_streambuf<Allocator>& b, + ASIO_STRING_VIEW_PARAM delim, + ASIO_MOVE_ARG(ReadHandler) handler) +{ + return async_read_until(s, basic_streambuf_ref<Allocator>(b), + delim, ASIO_MOVE_CAST(ReadHandler)(handler)); +} + +#if defined(ASIO_HAS_BOOST_REGEX) + +template <typename AsyncReadStream, typename Allocator, typename ReadHandler> +inline ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + asio::basic_streambuf<Allocator>& b, const boost::regex& expr, + ASIO_MOVE_ARG(ReadHandler) handler) +{ + return async_read_until(s, basic_streambuf_ref<Allocator>(b), + expr, ASIO_MOVE_CAST(ReadHandler)(handler)); +} + +#endif // defined(ASIO_HAS_BOOST_REGEX) + +template <typename AsyncReadStream, typename Allocator, + typename MatchCondition, typename ReadHandler> +inline ASIO_INITFN_RESULT_TYPE(ReadHandler, + void (asio::error_code, std::size_t)) +async_read_until(AsyncReadStream& s, + asio::basic_streambuf<Allocator>& b, + MatchCondition match_condition, ASIO_MOVE_ARG(ReadHandler) handler, + typename enable_if<is_match_condition<MatchCondition>::value>::type*) +{ + return async_read_until(s, basic_streambuf_ref<Allocator>(b), + match_condition, ASIO_MOVE_CAST(ReadHandler)(handler)); +} + +#endif // !defined(ASIO_NO_IOSTREAM) +#endif // !defined(ASIO_NO_EXTENSIONS) + +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // ASIO_IMPL_READ_UNTIL_HPP |