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;
}
}
std::size_t read(SyncReadStream& s,
asio::basic_streambuf<Allocator>& b,
CompletionCondition completion_condition, asio::error_code& ec)
{
ec = asio::error_code();
std::size_t total_transferred = 0;
std::size_t max_size = detail::adapt_completion_condition_result(
completion_condition(ec, total_transferred));
std::size_t bytes_available = read_size_helper(b, max_size);
while (bytes_available > 0)
{
std::size_t bytes_transferred = s.read_some(b.prepare(bytes_available), ec);
b.commit(bytes_transferred);
total_transferred += bytes_transferred;
max_size = detail::adapt_completion_condition_result(
completion_condition(ec, total_transferred));
bytes_available = read_size_helper(b, max_size);
}
return total_transferred;
}
std::size_t read_at(SyncRandomAccessReadDevice& d,
uint64_t offset, lslboost::asio::basic_streambuf<Allocator>& b,
CompletionCondition completion_condition, lslboost::system::error_code& ec)
{
ec = lslboost::system::error_code();
std::size_t total_transferred = 0;
std::size_t max_size = detail::adapt_completion_condition_result(
completion_condition(ec, total_transferred));
std::size_t bytes_available = read_size_helper(b, max_size);
while (bytes_available > 0)
{
std::size_t bytes_transferred = d.read_some_at(
offset + total_transferred, b.prepare(bytes_available), ec);
b.commit(bytes_transferred);
total_transferred += bytes_transferred;
max_size = detail::adapt_completion_condition_result(
completion_condition(ec, total_transferred));
bytes_available = read_size_helper(b, max_size);
}
return total_transferred;
}
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;
}
}
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*)
{
std::size_t search_position = 0;
for (;;)
{
// Determine the range of the data to be searched.
typedef typename asio::basic_streambuf<
Allocator>::const_buffers_type const_buffers_type;
typedef 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 = 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 = read_size_helper(b, 65536);
b.commit(s.read_some(b.prepare(bytes_to_read), ec));
if (ec)
return 0;
}
}
void operator()(const asio::error_code& ec,
std::size_t bytes_transferred, int start = 0)
{
std::size_t max_size, bytes_available;
switch (start)
{
case 1:
max_size = this->check_for_completion(ec, total_transferred_);
bytes_available = read_size_helper(streambuf_, max_size);
for (;;)
{
stream_.async_read_some(streambuf_.prepare(bytes_available), *this);
return; default:
total_transferred_ += bytes_transferred;
streambuf_.commit(bytes_transferred);
max_size = this->check_for_completion(ec, total_transferred_);
bytes_available = read_size_helper(streambuf_, max_size);
if ((!ec && bytes_transferred == 0) || bytes_available == 0)
break;
}
handler_(ec, static_cast<const std::size_t&>(total_transferred_));
}
}
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;
}
}
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);
}
}
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)
{
case 1:
for (;;)
{
{
// Determine the range of the data to be searched.
typedef typename asio::basic_streambuf<
Allocator>::const_buffers_type const_buffers_type;
typedef 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), *this);
return; default:
streambuf_.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);
}
}
