Exemplo n.º 1
0
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;
  }
}
Exemplo n.º 2
0
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;
  }
}
Exemplo n.º 3
0
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;
  }
}
Exemplo n.º 4
0
std::size_t read(SyncReadStream& s,
    boost::asio::basic_streambuf<Allocator>& b,
    CompletionCondition completion_condition, boost::system::error_code& ec)
{
  ec = boost::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 = 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;
}
Exemplo n.º 5
0
std::size_t read_at(SyncRandomAccessReadDevice& d,
    boost::uint64_t offset, boost::asio::basic_streambuf<Allocator>& b,
    CompletionCondition completion_condition, boost::system::error_code& ec)
{
  ec = boost::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;
}