archive_binary_impl.hpp

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//
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// as published by the Free Software Foundation.
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/// @file
/// Experimental API header
 
namespace mysql::serialization {
 
template <typename Field_type>
Archive_binary &Archive_binary::operator<<(Field_type &&arg) {
  static constexpr auto value_size = Field_type::value_size;
  using value_type = typename std::decay_t<Field_type>::value_type;
 
  if (is_good() == true) {
    try {
      size_t current_size = m_stream.size();
      size_t field_written_size = Primitive_type_codec<
          value_type>::template count_write_bytes<value_size>(arg.get());
      m_stream.resize(m_stream.size() + field_written_size);
      // and overwrite it with correct, formatted data
      if (Primitive_type_codec<value_type>::template write_bytes<value_size>(
              m_stream.data() + current_size, arg.get()) == 0) {
        m_error = Serialization_error(
            __FILE__, __LINE__, "Unable to write data to the stream",
            Serialization_error_type::archive_write_error);
      }
    } catch (std::bad_alloc &) {
      m_error = Serialization_error(__FILE__, __LINE__,
                                    "Got bad alloc, unable to insert field",
                                    Serialization_error_type::out_of_memory);
    }
  }
  return *this;
}
 
template <typename Field_type>
Archive_binary &Archive_binary::operator>>(Field_type &&arg) {
  static constexpr auto value_size = Field_type::value_size;
  using value_type = typename std::decay_t<Field_type>::value_type;
 
  if (is_good() == true) {
    auto bytes_read =
        Primitive_type_codec<std::decay_t<value_type>>::template read_bytes<
            value_size>(m_stream.data() + read_pos, m_stream.size() - read_pos,
                        arg.get());
    if (bytes_read == 0) {
      m_error = Serialization_error(
          __FILE__, __LINE__, "Unable to read data from the stream",
          Serialization_error_type::archive_read_error);
      return *this;
    }
    read_pos += bytes_read;
  }
  return *this;
}
 
template <class Field_type>
void Archive_binary::peek(Field_type &&field) {
  auto read_pos_saved = read_pos;
  this->operator>>(std::forward<Field_type>(field));
  read_pos = read_pos_saved;
}
 
}  // namespace mysql::serialization