write_ubjson()

template<typename BasicJsonType , typename CharType >

void nlohmann::detail::binary_writer< BasicJsonType, CharType >::write_ubjson ( const BasicJsonType &  j, const bool  use_count, const bool  use_type, const bool  add_prefix = true  )

inline

Parameters

[in]	j	JSON value to serialize
[in]	use_count	whether to use '#' prefixes (optimized format)
[in]	use_type	whether to use '$' prefixes (optimized format)
[in]	add_prefix	whether prefixes need to be used for this value

Definition at line 14573 of file json.hpp.

    {
        switch (j.type())
        {
            case value_t::null:
            {
                if (add_prefix)
                {
                    oa->write_character(to_char_type('Z'));
                }
 
                break;
            }
 
            case value_t::boolean:
            {
                if (add_prefix)
                {
                    oa->write_character(j.m_value.boolean
                                        ? to_char_type('T')
                                        : to_char_type('F'));
                }
 
                break;
            }
 
            case value_t::number_integer:
            {
                write_number_with_ubjson_prefix(j.m_value.number_integer, add_prefix);
                break;
            }
 
            case value_t::number_unsigned:
            {
                write_number_with_ubjson_prefix(j.m_value.number_unsigned, add_prefix);
                break;
            }
 
            case value_t::number_float:
            {
                write_number_with_ubjson_prefix(j.m_value.number_float, add_prefix);
                break;
            }
 
            case value_t::string:
            {
                if (add_prefix)
                {
                    oa->write_character(to_char_type('S'));
                }
 
                write_number_with_ubjson_prefix(j.m_value.string->size(), true);
                oa->write_characters(
                    reinterpret_cast<const CharType *>(j.m_value.string->c_str()),
                    j.m_value.string->size());
                break;
            }
 
            case value_t::array:
            {
                if (add_prefix)
                {
                    oa->write_character(to_char_type('['));
                }
 
                bool prefix_required = true;
 
                if (use_type && !j.m_value.array->empty())
                {
                    JSON_ASSERT(use_count);
                    const CharType first_prefix = ubjson_prefix(j.front());
                    const bool same_prefix = std::all_of(j.begin() + 1, j.end(),
                                                         [this, first_prefix](const BasicJsonType & v)
                    {
                        return ubjson_prefix(v) == first_prefix;
                    });
 
                    if (same_prefix)
                    {
                        prefix_required = false;
                        oa->write_character(to_char_type('$'));
                        oa->write_character(first_prefix);
                    }
                }
 
                if (use_count)
                {
                    oa->write_character(to_char_type('#'));
                    write_number_with_ubjson_prefix(j.m_value.array->size(), true);
                }
 
                for (const auto &el : *j.m_value.array)
                {
                    write_ubjson(el, use_count, use_type, prefix_required);
                }
 
                if (!use_count)
                {
                    oa->write_character(to_char_type(']'));
                }
 
                break;
            }
 
            case value_t::binary:
            {
                if (add_prefix)
                {
                    oa->write_character(to_char_type('['));
                }
 
                if (use_type && !j.m_value.binary->empty())
                {
                    JSON_ASSERT(use_count);
                    oa->write_character(to_char_type('$'));
                    oa->write_character('U');
                }
 
                if (use_count)
                {
                    oa->write_character(to_char_type('#'));
                    write_number_with_ubjson_prefix(j.m_value.binary->size(), true);
                }
 
                if (use_type)
                {
                    oa->write_characters(
                        reinterpret_cast<const CharType *>(j.m_value.binary->data()),
                        j.m_value.binary->size());
                }
 
                else
                {
                    for (size_t i = 0; i < j.m_value.binary->size(); ++i)
                    {
                        oa->write_character(to_char_type('U'));
                        oa->write_character(j.m_value.binary->data()[i]);
                    }
                }
 
                if (!use_count)
                {
                    oa->write_character(to_char_type(']'));
                }
 
                break;
            }
 
            case value_t::object:
            {
                if (add_prefix)
                {
                    oa->write_character(to_char_type('{'));
                }
 
                bool prefix_required = true;
 
                if (use_type && !j.m_value.object->empty())
                {
                    JSON_ASSERT(use_count);
                    const CharType first_prefix = ubjson_prefix(j.front());
                    const bool same_prefix = std::all_of(j.begin(), j.end(),
                                                         [this, first_prefix](const BasicJsonType & v)
                    {
                        return ubjson_prefix(v) == first_prefix;
                    });
 
                    if (same_prefix)
                    {
                        prefix_required = false;
                        oa->write_character(to_char_type('$'));
                        oa->write_character(first_prefix);
                    }
                }
 
                if (use_count)
                {
                    oa->write_character(to_char_type('#'));
                    write_number_with_ubjson_prefix(j.m_value.object->size(), true);
                }
 
                for (const auto &el : *j.m_value.object)
                {
                    write_number_with_ubjson_prefix(el.first.size(), true);
                    oa->write_characters(
                        reinterpret_cast<const CharType *>(el.first.c_str()),
                        el.first.size());
                    write_ubjson(el.second, use_count, use_type, prefix_required);
                }
 
                if (!use_count)
                {
                    oa->write_character(to_char_type('}'));
                }
 
                break;
            }
 
            case value_t::discarded:
            default:
                break;
        }
    }