in MiniEngine/Model/json.hpp [13073:13373]
void write_cbor(const BasicJsonType& j)
{
switch (j.type())
{
case value_t::null:
{
oa->write_character(to_char_type(0xF6));
break;
}
case value_t::boolean:
{
oa->write_character(j.m_value.boolean
? to_char_type(0xF5)
: to_char_type(0xF4));
break;
}
case value_t::number_integer:
{
if (j.m_value.number_integer >= 0)
{
// CBOR does not differentiate between positive signed
// integers and unsigned integers. Therefore, we used the
// code from the value_t::number_unsigned case here.
if (j.m_value.number_integer <= 0x17)
{
write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
else if (j.m_value.number_integer <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0x18));
write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
else if (j.m_value.number_integer <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0x19));
write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
}
else if (j.m_value.number_integer <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0x1A));
write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
}
else
{
oa->write_character(to_char_type(0x1B));
write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
}
}
else
{
// The conversions below encode the sign in the first
// byte, and the value is converted to a positive number.
const auto positive_number = -1 - j.m_value.number_integer;
if (j.m_value.number_integer >= -24)
{
write_number(static_cast<std::uint8_t>(0x20 + positive_number));
}
else if (positive_number <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0x38));
write_number(static_cast<std::uint8_t>(positive_number));
}
else if (positive_number <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0x39));
write_number(static_cast<std::uint16_t>(positive_number));
}
else if (positive_number <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0x3A));
write_number(static_cast<std::uint32_t>(positive_number));
}
else
{
oa->write_character(to_char_type(0x3B));
write_number(static_cast<std::uint64_t>(positive_number));
}
}
break;
}
case value_t::number_unsigned:
{
if (j.m_value.number_unsigned <= 0x17)
{
write_number(static_cast<std::uint8_t>(j.m_value.number_unsigned));
}
else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0x18));
write_number(static_cast<std::uint8_t>(j.m_value.number_unsigned));
}
else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0x19));
write_number(static_cast<std::uint16_t>(j.m_value.number_unsigned));
}
else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0x1A));
write_number(static_cast<std::uint32_t>(j.m_value.number_unsigned));
}
else
{
oa->write_character(to_char_type(0x1B));
write_number(static_cast<std::uint64_t>(j.m_value.number_unsigned));
}
break;
}
case value_t::number_float:
{
if (std::isnan(j.m_value.number_float))
{
// NaN is 0xf97e00 in CBOR
oa->write_character(to_char_type(0xF9));
oa->write_character(to_char_type(0x7E));
oa->write_character(to_char_type(0x00));
}
else if (std::isinf(j.m_value.number_float))
{
// Infinity is 0xf97c00, -Infinity is 0xf9fc00
oa->write_character(to_char_type(0xf9));
oa->write_character(j.m_value.number_float > 0 ? to_char_type(0x7C) : to_char_type(0xFC));
oa->write_character(to_char_type(0x00));
}
else
{
write_compact_float(j.m_value.number_float, detail::input_format_t::cbor);
}
break;
}
case value_t::string:
{
// step 1: write control byte and the string length
const auto N = j.m_value.string->size();
if (N <= 0x17)
{
write_number(static_cast<std::uint8_t>(0x60 + N));
}
else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0x78));
write_number(static_cast<std::uint8_t>(N));
}
else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0x79));
write_number(static_cast<std::uint16_t>(N));
}
else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0x7A));
write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
oa->write_character(to_char_type(0x7B));
write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
// step 2: write the string
oa->write_characters(
reinterpret_cast<const CharType*>(j.m_value.string->c_str()),
j.m_value.string->size());
break;
}
case value_t::array:
{
// step 1: write control byte and the array size
const auto N = j.m_value.array->size();
if (N <= 0x17)
{
write_number(static_cast<std::uint8_t>(0x80 + N));
}
else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0x98));
write_number(static_cast<std::uint8_t>(N));
}
else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0x99));
write_number(static_cast<std::uint16_t>(N));
}
else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0x9A));
write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
oa->write_character(to_char_type(0x9B));
write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
// step 2: write each element
for (const auto& el : *j.m_value.array)
{
write_cbor(el);
}
break;
}
case value_t::binary:
{
if (j.m_value.binary->has_subtype())
{
write_number(static_cast<std::uint8_t>(0xd8));
write_number(j.m_value.binary->subtype());
}
// step 1: write control byte and the binary array size
const auto N = j.m_value.binary->size();
if (N <= 0x17)
{
write_number(static_cast<std::uint8_t>(0x40 + N));
}
else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0x58));
write_number(static_cast<std::uint8_t>(N));
}
else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0x59));
write_number(static_cast<std::uint16_t>(N));
}
else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0x5A));
write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
oa->write_character(to_char_type(0x5B));
write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
// step 2: write each element
oa->write_characters(
reinterpret_cast<const CharType*>(j.m_value.binary->data()),
N);
break;
}
case value_t::object:
{
// step 1: write control byte and the object size
const auto N = j.m_value.object->size();
if (N <= 0x17)
{
write_number(static_cast<std::uint8_t>(0xA0 + N));
}
else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
oa->write_character(to_char_type(0xB8));
write_number(static_cast<std::uint8_t>(N));
}
else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
oa->write_character(to_char_type(0xB9));
write_number(static_cast<std::uint16_t>(N));
}
else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
oa->write_character(to_char_type(0xBA));
write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
oa->write_character(to_char_type(0xBB));
write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
// step 2: write each element
for (const auto& el : *j.m_value.object)
{
write_cbor(el.first);
write_cbor(el.second);
}
break;
}
default:
break;
}
}