Function serialize_cbor_number

example/cbor.cpp:25–62

using namespace boost::json;

void serialize_cbor_number(
    unsigned char mt, std::uint64_t n, std::vector<unsigned char> & out )
{
    mt <<= 5;

    if( n < 24 )
    {
        out.push_back( static_cast<unsigned char>( mt + n ) );
    }
    else if( n < 256 )
    {
        unsigned char data[] = { static_cast<unsigned char>( mt + 24 ), static_cast<unsigned char>( n ) };
        out.insert( out.end(), std::begin( data ), std::end( data ) );
    }
    else if( n < 65536 )
    {
        unsigned char data[] = { static_cast<unsigned char>( mt + 25 ), static_cast<unsigned char>( n >> 8 ), static_cast<unsigned char>( n ) };
        out.insert( out.end(), std::begin( data ), std::end( data ) );
    }
    else if( n < 0x1000000ull )
    {
        unsigned char data[ 5 ];

        data[ 0 ] = static_cast<unsigned char>( mt + 26 );
        boost::endian::endian_store<std::uint32_t, 4, boost::endian::order::big>( data + 1, static_cast<std::uint32_t>( n ) );

        out.insert( out.end(), std::begin( data ), std::end( data ) );
    }
    else
    {
        unsigned char data[ 9 ];

        data[ 0 ] = static_cast<unsigned char>( mt + 27 );
        boost::endian::endian_store<std::uint64_t, 8, boost::endian::order::big>( data + 1, n );

        out.insert( out.end(), std::begin( data ), std::end( data ) );
    }
}

void
serialize_cbor_string( string_view sv, std::vector<unsigned char>& out )