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BSON: Object with single boolean

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This commit is contained in:
Julian Becker 2018-09-15 03:08:50 +02:00
parent 5f5836ce1c
commit 9a0dddc5d2
5 changed files with 330 additions and 6 deletions
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44
include/nlohmann/detail/output/binary_writer.hpp
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@ -677,6 +677,16 @@ class binary_writer
}
std::size_t write_bson_object_entry(const typename BasicJsonType::string_t& name, const BasicJsonType& j)
{
oa->write_character(static_cast<CharType>(0x08)); // boolean
oa->write_characters(
reinterpret_cast<const CharType*>(name.c_str()),
name.size() + 1u);
oa->write_character(j.m_value.boolean ? static_cast<CharType>(0x01) : static_cast<CharType>(0x00));
return /*id*/ 1ul + name.size() + 1u + /*boolean value*/ 1u;
}
/*!
@param[in] j JSON value to serialize
@pre j.type() == value_t::object
@ -684,8 +694,16 @@ class binary_writer
void write_bson_object(const BasicJsonType& j)
{
assert(j.type() == value_t::object);
write_number_little_endian(5);
auto document_size_offset = oa->reserve_characters(4ul);
std::int32_t document_size = 5ul;
for (const auto& el : *j.m_value.object)
{
document_size += write_bson_object_entry(el.first, el.second);
}
oa->write_character(static_cast<CharType>(0x00));
write_number_little_endian_at(document_size_offset, document_size);
}
/*!
@ -759,6 +777,30 @@ class binary_writer
oa->write_characters(vec.data(), sizeof(NumberType));
}
/*
@brief write a number to output in little endian format
@param[in] offset The offset where to start writing
@param[in] n number of type @a NumberType
@tparam NumberType the type of the number
*/
template<typename NumberType>
void write_number_little_endian_at(std::size_t offset, const NumberType n)
{
// step 1: write number to array of length NumberType
std::array<CharType, sizeof(NumberType)> vec;
std::memcpy(vec.data(), &n, sizeof(NumberType));
// step 2: write array to output (with possible reordering)
if (!is_little_endian)
{
// reverse byte order prior to conversion if necessary
std::reverse(vec.begin(), vec.end());
}
oa->write_characters_at(offset, vec.data(), sizeof(NumberType));
}
// UBJSON: write number (floating point)
template<typename NumberType, typename std::enable_if<