get_cbor_string()

template<typename BasicJsonType , typename InputAdapterType , typename SAX = json_sax_dom_parser<BasicJsonType>>

bool nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_string ( string_t &  result )

inlineprivate

reads a CBOR string

This function first reads starting bytes to determine the expected string length and then copies this number of bytes into a string. Additionally, CBOR's strings with indefinite lengths are supported.

Parameters

[out]

result

created string

Returns

whether string creation completed

Definition at line 9298 of file json.hpp.

    {
        if (JSON_HEDLEY_UNLIKELY(!unexpect_eof(input_format_t::cbor, "string")))
        {
            return false;
        }
 
        switch (current)
        {
            // UTF-8 string (0x00..0x17 bytes follow)
            case 0x60:
            case 0x61:
            case 0x62:
            case 0x63:
            case 0x64:
            case 0x65:
            case 0x66:
            case 0x67:
            case 0x68:
            case 0x69:
            case 0x6A:
            case 0x6B:
            case 0x6C:
            case 0x6D:
            case 0x6E:
            case 0x6F:
            case 0x70:
            case 0x71:
            case 0x72:
            case 0x73:
            case 0x74:
            case 0x75:
            case 0x76:
            case 0x77:
            {
                return get_string(input_format_t::cbor, static_cast<unsigned int>(current) & 0x1Fu, result);
            }
 
            case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
            {
                std::uint8_t len{};
                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
            }
 
            case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
            {
                std::uint16_t len{};
                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
            }
 
            case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
            {
                std::uint32_t len{};
                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
            }
 
            case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
            {
                std::uint64_t len{};
                return get_number(input_format_t::cbor, len) && get_string(input_format_t::cbor, len, result);
            }
 
            case 0x7F: // UTF-8 string (indefinite length)
            {
                while (get() != 0xFF)
                {
                    string_t chunk;
 
                    if (!get_cbor_string(chunk))
                    {
                        return false;
                    }
 
                    result.append(chunk);
                }
 
                return true;
            }
 
            default:
            {
                auto last_token = get_token_string();
                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::cbor, "expected length specification (0x60-0x7B) or indefinite string type (0x7F); last byte: 0x" + last_token, "string"), BasicJsonType()));
            }
        }
    }