Function write_decimal_value

include/jsoncons_ext/cbor/cbor_encoder.hpp:596–743

    }

    void write_decimal_value(const string_view_type& sv, const ser_context& context, std::error_code& ec)
    {
        decimal_parse_state state = decimal_parse_state::start;
        std::basic_string<char> s;
        std::basic_string<char> exponent;
        int64_t scale = 0;
        for (auto c : sv)
        {
            switch (state)
            {
                case decimal_parse_state::start:
                {
                    switch (c)
                    {
                        case '-':
                        case '0':case '1':case '2':case '3':case '4':case '5':case '6':case '7':case '8': case '9':
                            s.push_back(c);
                            state = decimal_parse_state::integer;
                            break;
                        case '+':
                            state = decimal_parse_state::integer;
                            break;
                        case '.':
                            state = decimal_parse_state::fraction1;
                            break;
                        default:
                        {
                            ec = cbor_errc::invalid_decimal_fraction;
                            return;
                        }
                    }
                    break;
                }
                case decimal_parse_state::integer:
                {
                    switch (c)
                    {
                        case '0':case '1':case '2':case '3':case '4':case '5':case '6':case '7':case '8': case '9':
                            s.push_back(c);
                            break;
                        case 'e': case 'E':
                            state = decimal_parse_state::exp1;
                            break;
                        case '.':
                            state = decimal_parse_state::fraction1;
                            break;
                        default:
                        {
                            ec = cbor_errc::invalid_decimal_fraction;
                            return;
                        }
                    }
                    break;
                }
                case decimal_parse_state::exp1:
                {
                    switch (c)
                    {