🔨 refactored CBOR code to a switch
This commit is contained in:
Niels Lohmann
parent
d99c230f51
commit
f1b95d78f9
2 changed files with 990 additions and 636 deletions
813
src/json.hpp
813
src/json.hpp
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@ -6262,13 +6262,28 @@ class basic_json
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}
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}
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/*
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/*!
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@brief take sufficient bytes from a vector to fill an integer variable
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In the context of binary serialization formats, we need to read several
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bytes from a byte vector and combine them to multi-byte integral data
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types.
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@param[in] vec byte vector to read from
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@param[in] current_index the psition in the vector after which to read
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@return the next sizeof(T) bytes from @a vec, in reverse order as T
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@tparam T the integral return type
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@throw std::out_of_range if there are less than sizeof(T)+1 bytes in the
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vector @a vec to read
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Precondition:
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vec: | | | a | b | c | d | | | T: | | | | |
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^ ^ ^ ^
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current_index idx ptr sizeof(T)
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current_index idx ptr sizeof(T)
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Postcondition:
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@ -6277,12 +6292,16 @@ class basic_json
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| idx ptr
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current_index
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Code from <http://stackoverflow.com/a/41031865/266378>
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@sa Code from <http://stackoverflow.com/a/41031865/266378>.
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*/
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template<typename T>
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static T get_from_vector(const std::vector<uint8_t>& vec, const size_t current_index)
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{
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if (current_index + sizeof(T) + 1 > vec.size())
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{
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throw std::out_of_range("cannot read " + std::to_string(sizeof(T)) + " bytes from vector");
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}
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T result;
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uint8_t* ptr = reinterpret_cast<uint8_t*>(&result);
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size_t idx = current_index + 1 + sizeof(T);
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@ -6959,327 +6978,485 @@ class basic_json
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// store and increment index
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const size_t current_idx = idx++;
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if (v[current_idx] <= 0x17) // Integer 0x00..0x17
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switch (v[current_idx])
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{
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return v[current_idx];
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}
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else if (v[current_idx] == 0x18) // Unsigned integer uint8_t
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{
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idx += 1; // skip content byte
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return get_from_vector<uint8_t>(v, current_idx);
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}
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else if (v[current_idx] == 0x19) // Unsigned integer uint16_t
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{
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idx += 2; // skip 2 content bytes
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return get_from_vector<uint16_t>(v, current_idx);
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}
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else if (v[current_idx] == 0x1a) // Unsigned integer uint32_t
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{
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idx += 4; // skip 4 content bytes
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return get_from_vector<uint32_t>(v, current_idx);
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}
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else if (v[current_idx] == 0x1b) // Unsigned integer uint64_t
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{
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idx += 8; // skip 8 content bytes
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return get_from_vector<uint64_t>(v, current_idx);
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}
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else if (v[current_idx] >= 0x20 and v[current_idx] <= 0x37) // Negative integer
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{
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return static_cast<int8_t>(0x20 - 1 - v[current_idx]);
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}
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else if (v[current_idx] == 0x38) // Negative integer
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{
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idx += 1; // skip content byte
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// must be uint8_t !
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return -1 - get_from_vector<uint8_t>(v, current_idx);
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}
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else if (v[current_idx] == 0x39) // Negative integer
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{
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idx += 2; // skip 2 content bytes
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return -1 - get_from_vector<int16_t>(v, current_idx);
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}
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else if (v[current_idx] == 0x3a) // Negative integer
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{
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idx += 4; // skip 4 content bytes
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return -1 - get_from_vector<int32_t>(v, current_idx);
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}
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else if (v[current_idx] == 0x3b) // Negative integer
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{
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idx += 8; // skip 8 content bytes
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return -1 - get_from_vector<int64_t>(v, current_idx);
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}
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else if (v[current_idx] >= 0x60 and v[current_idx] <= 0x77) // UTF-8 string
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{
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const size_t len = v[current_idx] - 0x60;
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const size_t offset = current_idx + 1;
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idx += len; // skip content bytes
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return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
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}
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else if (v[current_idx] == 0x78) // UTF-8 string
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{
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const auto len = get_from_vector<uint8_t>(v, current_idx);
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const size_t offset = current_idx + 2;
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idx += len + 1; // skip size byte + content bytes
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return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
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}
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else if (v[current_idx] == 0x79) // UTF-8 string
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{
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const auto len = get_from_vector<uint16_t>(v, current_idx);
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const size_t offset = current_idx + 3;
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idx += len + 2; // skip 2 size bytes + content bytes
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return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
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}
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else if (v[current_idx] == 0x7a) // UTF-8 string
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{
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const auto len = get_from_vector<uint32_t>(v, current_idx);
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const size_t offset = current_idx + 5;
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idx += len + 4; // skip 4 size bytes + content bytes
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return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
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}
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else if (v[current_idx] == 0x7b) // UTF-8 string
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{
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const auto len = get_from_vector<uint64_t>(v, current_idx);
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const size_t offset = current_idx + 9;
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idx += len + 8; // skip 8 size bytes + content bytes
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return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
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}
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else if (v[current_idx] == 0x7f) // UTF-8 string (indefinite length)
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{
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std::string result;
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while (v[idx] != 0xff)
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// integer
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case 0x00:
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case 0x01:
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case 0x02:
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case 0x03:
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case 0x04:
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case 0x05:
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case 0x06:
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case 0x07:
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case 0x08:
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case 0x09:
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case 0x0a:
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case 0x0b:
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case 0x0c:
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case 0x0d:
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case 0x0e:
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case 0x0f:
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case 0x10:
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case 0x11:
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case 0x12:
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case 0x13:
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case 0x14:
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case 0x15:
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case 0x16:
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case 0x17:
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{
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string_t s = from_cbor_internal(v, idx);
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result += s;
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return v[current_idx];
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}
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// skip break byte (0xFF)
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idx += 1;
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return result;
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}
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else if (v[current_idx] >= 0x80 and v[current_idx] <= 0x97) // array
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{
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basic_json result = value_t::array;
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const size_t len = v[current_idx] - 0x80;
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for (size_t i = 0; i < len; ++i)
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{
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result.push_back(from_cbor_internal(v, idx));
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}
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return result;
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}
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else if (v[current_idx] == 0x98) // array
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{
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basic_json result = value_t::array;
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const auto len = get_from_vector<uint8_t>(v, current_idx);
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idx += 1; // skip 1 size byte
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for (size_t i = 0; i < len; ++i)
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{
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result.push_back(from_cbor_internal(v, idx));
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}
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return result;
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}
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else if (v[current_idx] == 0x99) // array
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{
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basic_json result = value_t::array;
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const auto len = get_from_vector<uint16_t>(v, current_idx);
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idx += 2; // skip 4 size bytes
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for (size_t i = 0; i < len; ++i)
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{
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result.push_back(from_cbor_internal(v, idx));
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}
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return result;
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}
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else if (v[current_idx] == 0x9a) // array
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{
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basic_json result = value_t::array;
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const auto len = get_from_vector<uint32_t>(v, current_idx);
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idx += 4; // skip 4 size bytes
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for (size_t i = 0; i < len; ++i)
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{
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result.push_back(from_cbor_internal(v, idx));
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}
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return result;
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}
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else if (v[current_idx] == 0x9b) // array
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{
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basic_json result = value_t::array;
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const auto len = get_from_vector<uint64_t>(v, current_idx);
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idx += 8; // skip 8 size bytes
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for (size_t i = 0; i < len; ++i)
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{
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result.push_back(from_cbor_internal(v, idx));
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}
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return result;
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}
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else if (v[current_idx] == 0x9f) // array (indefinite length)
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{
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basic_json result = value_t::array;
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while (v[idx] != 0xff)
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{
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result.push_back(from_cbor_internal(v, idx));
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}
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// skip break byte (0xFF)
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idx += 1;
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return result;
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}
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else if (v[current_idx] >= 0xa0 and v[current_idx] <= 0xb7) // map
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{
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basic_json result = value_t::object;
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const size_t len = v[current_idx] - 0xa0;
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for (size_t i = 0; i < len; ++i)
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{
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std::string key = from_cbor_internal(v, idx);
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result[key] = from_cbor_internal(v, idx);
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}
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return result;
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}
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else if (v[current_idx] == 0xb8) // map
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{
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basic_json result = value_t::object;
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const auto len = get_from_vector<uint8_t>(v, current_idx);
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idx += 1; // skip 1 size byte
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for (size_t i = 0; i < len; ++i)
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{
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std::string key = from_cbor_internal(v, idx);
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result[key] = from_cbor_internal(v, idx);
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}
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return result;
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}
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else if (v[current_idx] == 0xb9) // map
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{
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basic_json result = value_t::object;
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const auto len = get_from_vector<uint16_t>(v, current_idx);
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idx += 2; // skip 2 size bytes
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for (size_t i = 0; i < len; ++i)
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{
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std::string key = from_cbor_internal(v, idx);
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result[key] = from_cbor_internal(v, idx);
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}
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return result;
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}
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else if (v[current_idx] == 0xba) // map
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{
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basic_json result = value_t::object;
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const auto len = get_from_vector<uint32_t>(v, current_idx);
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idx += 4; // skip 4 size bytes
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for (size_t i = 0; i < len; ++i)
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{
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std::string key = from_cbor_internal(v, idx);
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result[key] = from_cbor_internal(v, idx);
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}
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return result;
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}
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else if (v[current_idx] == 0xbb) // map
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{
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basic_json result = value_t::object;
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const auto len = get_from_vector<uint64_t>(v, current_idx);
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idx += 8; // skip 8 size bytes
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for (size_t i = 0; i < len; ++i)
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{
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std::string key = from_cbor_internal(v, idx);
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result[key] = from_cbor_internal(v, idx);
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}
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return result;
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}
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else if (v[current_idx] == 0xbf) // map (indefinite length)
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{
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basic_json result = value_t::object;
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while (v[idx] != 0xff)
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{
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std::string key = from_cbor_internal(v, idx);
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result[key] = from_cbor_internal(v, idx);
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}
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// skip break byte (0xFF)
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idx += 1;
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return result;
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}
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else if (v[current_idx] == 0xf4) // false
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{
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return false;
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}
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else if (v[current_idx] == 0xf5) // true
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{
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return true;
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}
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else if (v[current_idx] == 0xf6) // null
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{
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return value_t::null;
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}
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else if (v[current_idx] == 0xf9) // Half-Precision Float
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{
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idx += 2; // skip two content bytes
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// code from RFC 7049, Appendix D, Figure 3:
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// As half-precision floating-point numbers were only added to IEEE
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// 754 in 2008, today's programming platforms often still only have
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// limited support for them. It is very easy to include at least
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// decoding support for them even without such support. An example
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// of a small decoder for half-precision floating-point numbers in
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// the C language is shown in Figure 3.
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const int half = (v[current_idx + 1] << 8) + v[current_idx + 2];
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const int exp = (half >> 10) & 0x1f;
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const int mant = half & 0x3ff;
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double val;
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if (exp == 0)
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case 0x18: // Unsigned integer uint8_t
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{
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val = std::ldexp(mant, -24);
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idx += 1; // skip content byte
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return get_from_vector<uint8_t>(v, current_idx);
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}
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else if (exp != 31)
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{
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val = std::ldexp(mant + 1024, exp - 25);
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}
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else
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{
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val = mant == 0 ? INFINITY : NAN;
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}
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return half & 0x8000 ? -val : val;
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}
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else if (v[current_idx] == 0xfa) // Single-Precision Float
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{
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// copy bytes in reverse order into the float variable
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float res;
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for (size_t byte = 0; byte < sizeof(float); ++byte)
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{
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reinterpret_cast<uint8_t*>(&res)[sizeof(float) - byte - 1] = v[current_idx + 1 + byte];
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}
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idx += sizeof(float); // skip content bytes
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return res;
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}
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else if (v[current_idx] == 0xfb) // Double-Precision Float
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{
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// copy bytes in reverse order into the double variable
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double res;
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for (size_t byte = 0; byte < sizeof(double); ++byte)
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{
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reinterpret_cast<uint8_t*>(&res)[sizeof(double) - byte - 1] = v[current_idx + 1 + byte];
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}
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idx += sizeof(double); // skip content bytes
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return res;
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}
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// 40..57 byte string
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// 58 byte string
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// 59 byte string
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// 5a byte string
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// 5b byte string
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// 5f byte string
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// 7f UTF-8 string with break
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// 9f array with break
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// bf map with break
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// c0 Text-based date/time
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// c1 Epoch-based date/time
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// c2 Positive bignum
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// c3 Positive bignum
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// c4 Decimal Fraction
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// c5 Bigfloat
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// c6..d4 tagged item
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// d5..d7 Expected Conversion
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// d8..db more tagged items
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// e0..f3 simple value
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// f7 undefined
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// f8 simple value
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// f9 half-precision float
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// ff break stop code
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case 0x19: // Unsigned integer uint16_t
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{
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idx += 2; // skip 2 content bytes
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return get_from_vector<uint16_t>(v, current_idx);
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}
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throw std::invalid_argument("error parsing a CBOR @ " + std::to_string(current_idx) + ": " + std::to_string(v[current_idx]));
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case 0x1a: // Unsigned integer uint32_t
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{
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idx += 4; // skip 4 content bytes
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return get_from_vector<uint32_t>(v, current_idx);
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}
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case 0x1b: // Unsigned integer uint64_t
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{
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idx += 8; // skip 8 content bytes
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return get_from_vector<uint64_t>(v, current_idx);
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}
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// Negative integer
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case 0x20:
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case 0x21:
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case 0x22:
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case 0x23:
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case 0x24:
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case 0x25:
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case 0x26:
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case 0x27:
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case 0x28:
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case 0x29:
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case 0x2a:
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case 0x2b:
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case 0x2c:
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case 0x2d:
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case 0x2e:
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case 0x2f:
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case 0x30:
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case 0x31:
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case 0x32:
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case 0x33:
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case 0x34:
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case 0x35:
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case 0x36:
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case 0x37:
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{
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return static_cast<int8_t>(0x20 - 1 - v[current_idx]);
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}
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case 0x38: // Negative integer
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{
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idx += 1; // skip content byte
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// must be uint8_t !
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return -1 - get_from_vector<uint8_t>(v, current_idx);
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}
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case 0x39: // Negative integer
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{
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idx += 2; // skip 2 content bytes
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return -1 - get_from_vector<int16_t>(v, current_idx);
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}
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case 0x3a: // Negative integer
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{
|
||||
idx += 4; // skip 4 content bytes
|
||||
return -1 - get_from_vector<int32_t>(v, current_idx);
|
||||
}
|
||||
|
||||
case 0x3b: // Negative integer
|
||||
{
|
||||
idx += 8; // skip 8 content bytes
|
||||
return -1 - get_from_vector<int64_t>(v, current_idx);
|
||||
}
|
||||
|
||||
// UTF-8 string
|
||||
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:
|
||||
{
|
||||
const size_t len = v[current_idx] - 0x60;
|
||||
const size_t offset = current_idx + 1;
|
||||
idx += len; // skip content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x78: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 2;
|
||||
idx += len + 1; // skip size byte + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x79: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 3;
|
||||
idx += len + 2; // skip 2 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x7a: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 5;
|
||||
idx += len + 4; // skip 4 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x7b: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 9;
|
||||
idx += len + 8; // skip 8 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x7f: // UTF-8 string (indefinite length)
|
||||
{
|
||||
std::string result;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
string_t s = from_cbor_internal(v, idx);
|
||||
result += s;
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
|
||||
// array
|
||||
case 0x80:
|
||||
case 0x81:
|
||||
case 0x82:
|
||||
case 0x83:
|
||||
case 0x84:
|
||||
case 0x85:
|
||||
case 0x86:
|
||||
case 0x87:
|
||||
case 0x88:
|
||||
case 0x89:
|
||||
case 0x8a:
|
||||
case 0x8b:
|
||||
case 0x8c:
|
||||
case 0x8d:
|
||||
case 0x8e:
|
||||
case 0x8f:
|
||||
case 0x90:
|
||||
case 0x91:
|
||||
case 0x92:
|
||||
case 0x93:
|
||||
case 0x94:
|
||||
case 0x95:
|
||||
case 0x96:
|
||||
case 0x97:
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const size_t len = v[current_idx] - 0x80;
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x98: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
idx += 1; // skip 1 size byte
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x99: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
idx += 2; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x9a: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
idx += 4; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x9b: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
idx += 8; // skip 8 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x9f: // array (indefinite length)
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
|
||||
// map
|
||||
case 0xa0:
|
||||
case 0xa1:
|
||||
case 0xa2:
|
||||
case 0xa3:
|
||||
case 0xa4:
|
||||
case 0xa5:
|
||||
case 0xa6:
|
||||
case 0xa7:
|
||||
case 0xa8:
|
||||
case 0xa9:
|
||||
case 0xaa:
|
||||
case 0xab:
|
||||
case 0xac:
|
||||
case 0xad:
|
||||
case 0xae:
|
||||
case 0xaf:
|
||||
case 0xb0:
|
||||
case 0xb1:
|
||||
case 0xb2:
|
||||
case 0xb3:
|
||||
case 0xb4:
|
||||
case 0xb5:
|
||||
case 0xb6:
|
||||
case 0xb7:
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const size_t len = v[current_idx] - 0xa0;
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xb8: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
idx += 1; // skip 1 size byte
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xb9: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
idx += 2; // skip 2 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xba: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
idx += 4; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xbb: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
idx += 8; // skip 8 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xbf: // map (indefinite length)
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xf4: // false
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
case 0xf5: // true
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
case 0xf6: // null
|
||||
{
|
||||
return value_t::null;
|
||||
}
|
||||
|
||||
case 0xf9: // Half-Precision Float
|
||||
{
|
||||
idx += 2; // skip two content bytes
|
||||
|
||||
// code from RFC 7049, Appendix D, Figure 3:
|
||||
// As half-precision floating-point numbers were only added to IEEE
|
||||
// 754 in 2008, today's programming platforms often still only have
|
||||
// limited support for them. It is very easy to include at least
|
||||
// decoding support for them even without such support. An example
|
||||
// of a small decoder for half-precision floating-point numbers in
|
||||
// the C language is shown in Figure 3.
|
||||
const int half = (v[current_idx + 1] << 8) + v[current_idx + 2];
|
||||
const int exp = (half >> 10) & 0x1f;
|
||||
const int mant = half & 0x3ff;
|
||||
double val;
|
||||
if (exp == 0)
|
||||
{
|
||||
val = std::ldexp(mant, -24);
|
||||
}
|
||||
else if (exp != 31)
|
||||
{
|
||||
val = std::ldexp(mant + 1024, exp - 25);
|
||||
}
|
||||
else
|
||||
{
|
||||
val = mant == 0 ? INFINITY : NAN;
|
||||
}
|
||||
return half & 0x8000 ? -val : val;
|
||||
}
|
||||
|
||||
case 0xfa: // Single-Precision Float
|
||||
{
|
||||
// copy bytes in reverse order into the float variable
|
||||
float res;
|
||||
for (size_t byte = 0; byte < sizeof(float); ++byte)
|
||||
{
|
||||
reinterpret_cast<uint8_t*>(&res)[sizeof(float) - byte - 1] = v[current_idx + 1 + byte];
|
||||
}
|
||||
idx += sizeof(float); // skip content bytes
|
||||
return res;
|
||||
}
|
||||
|
||||
case 0xfb: // Double-Precision Float
|
||||
{
|
||||
// copy bytes in reverse order into the double variable
|
||||
double res;
|
||||
for (size_t byte = 0; byte < sizeof(double); ++byte)
|
||||
{
|
||||
reinterpret_cast<uint8_t*>(&res)[sizeof(double) - byte - 1] = v[current_idx + 1 + byte];
|
||||
}
|
||||
idx += sizeof(double); // skip content bytes
|
||||
return res;
|
||||
}
|
||||
|
||||
// 40..57 byte string
|
||||
// 58 byte string
|
||||
// 59 byte string
|
||||
// 5a byte string
|
||||
// 5b byte string
|
||||
// 5f byte string
|
||||
// 7f UTF-8 string with break
|
||||
// 9f array with break
|
||||
// bf map with break
|
||||
// c0 Text-based date/time
|
||||
// c1 Epoch-based date/time
|
||||
// c2 Positive bignum
|
||||
// c3 Positive bignum
|
||||
// c4 Decimal Fraction
|
||||
// c5 Bigfloat
|
||||
// c6..d4 tagged item
|
||||
// d5..d7 Expected Conversion
|
||||
// d8..db more tagged items
|
||||
// e0..f3 simple value
|
||||
// f7 undefined
|
||||
// f8 simple value
|
||||
// f9 half-precision float
|
||||
// ff break stop code
|
||||
default:
|
||||
{
|
||||
throw std::invalid_argument("error parsing a CBOR @ " + std::to_string(current_idx) + ": " + std::to_string(v[current_idx]));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public:
|
||||
|
|
|
|||
|
|
@ -6262,13 +6262,28 @@ class basic_json
|
|||
}
|
||||
}
|
||||
|
||||
/*
|
||||
/*!
|
||||
@brief take sufficient bytes from a vector to fill an integer variable
|
||||
|
||||
In the context of binary serialization formats, we need to read several
|
||||
bytes from a byte vector and combine them to multi-byte integral data
|
||||
types.
|
||||
|
||||
@param[in] vec byte vector to read from
|
||||
@param[in] current_index the psition in the vector after which to read
|
||||
|
||||
@return the next sizeof(T) bytes from @a vec, in reverse order as T
|
||||
|
||||
@tparam T the integral return type
|
||||
|
||||
@throw std::out_of_range if there are less than sizeof(T)+1 bytes in the
|
||||
vector @a vec to read
|
||||
|
||||
Precondition:
|
||||
|
||||
vec: | | | a | b | c | d | | | T: | | | | |
|
||||
^ ^ ^ ^
|
||||
current_index idx ptr sizeof(T)
|
||||
|
||||
current_index idx ptr sizeof(T)
|
||||
|
||||
Postcondition:
|
||||
|
||||
|
|
@ -6277,12 +6292,16 @@ class basic_json
|
|||
| idx ptr
|
||||
current_index
|
||||
|
||||
|
||||
Code from <http://stackoverflow.com/a/41031865/266378>
|
||||
@sa Code from <http://stackoverflow.com/a/41031865/266378>.
|
||||
*/
|
||||
template<typename T>
|
||||
static T get_from_vector(const std::vector<uint8_t>& vec, const size_t current_index)
|
||||
{
|
||||
if (current_index + sizeof(T) + 1 > vec.size())
|
||||
{
|
||||
throw std::out_of_range("cannot read " + std::to_string(sizeof(T)) + " bytes from vector");
|
||||
}
|
||||
|
||||
T result;
|
||||
uint8_t* ptr = reinterpret_cast<uint8_t*>(&result);
|
||||
size_t idx = current_index + 1 + sizeof(T);
|
||||
|
|
@ -6959,327 +6978,485 @@ class basic_json
|
|||
// store and increment index
|
||||
const size_t current_idx = idx++;
|
||||
|
||||
if (v[current_idx] <= 0x17) // Integer 0x00..0x17
|
||||
switch (v[current_idx])
|
||||
{
|
||||
return v[current_idx];
|
||||
}
|
||||
else if (v[current_idx] == 0x18) // Unsigned integer uint8_t
|
||||
{
|
||||
idx += 1; // skip content byte
|
||||
return get_from_vector<uint8_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] == 0x19) // Unsigned integer uint16_t
|
||||
{
|
||||
idx += 2; // skip 2 content bytes
|
||||
return get_from_vector<uint16_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] == 0x1a) // Unsigned integer uint32_t
|
||||
{
|
||||
idx += 4; // skip 4 content bytes
|
||||
return get_from_vector<uint32_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] == 0x1b) // Unsigned integer uint64_t
|
||||
{
|
||||
idx += 8; // skip 8 content bytes
|
||||
return get_from_vector<uint64_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] >= 0x20 and v[current_idx] <= 0x37) // Negative integer
|
||||
{
|
||||
return static_cast<int8_t>(0x20 - 1 - v[current_idx]);
|
||||
}
|
||||
else if (v[current_idx] == 0x38) // Negative integer
|
||||
{
|
||||
idx += 1; // skip content byte
|
||||
// must be uint8_t !
|
||||
return -1 - get_from_vector<uint8_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] == 0x39) // Negative integer
|
||||
{
|
||||
idx += 2; // skip 2 content bytes
|
||||
return -1 - get_from_vector<int16_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] == 0x3a) // Negative integer
|
||||
{
|
||||
idx += 4; // skip 4 content bytes
|
||||
return -1 - get_from_vector<int32_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] == 0x3b) // Negative integer
|
||||
{
|
||||
idx += 8; // skip 8 content bytes
|
||||
return -1 - get_from_vector<int64_t>(v, current_idx);
|
||||
}
|
||||
else if (v[current_idx] >= 0x60 and v[current_idx] <= 0x77) // UTF-8 string
|
||||
{
|
||||
const size_t len = v[current_idx] - 0x60;
|
||||
const size_t offset = current_idx + 1;
|
||||
idx += len; // skip content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
else if (v[current_idx] == 0x78) // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 2;
|
||||
idx += len + 1; // skip size byte + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
else if (v[current_idx] == 0x79) // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 3;
|
||||
idx += len + 2; // skip 2 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
else if (v[current_idx] == 0x7a) // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 5;
|
||||
idx += len + 4; // skip 4 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
else if (v[current_idx] == 0x7b) // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 9;
|
||||
idx += len + 8; // skip 8 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
else if (v[current_idx] == 0x7f) // UTF-8 string (indefinite length)
|
||||
{
|
||||
std::string result;
|
||||
while (v[idx] != 0xff)
|
||||
// integer
|
||||
case 0x00:
|
||||
case 0x01:
|
||||
case 0x02:
|
||||
case 0x03:
|
||||
case 0x04:
|
||||
case 0x05:
|
||||
case 0x06:
|
||||
case 0x07:
|
||||
case 0x08:
|
||||
case 0x09:
|
||||
case 0x0a:
|
||||
case 0x0b:
|
||||
case 0x0c:
|
||||
case 0x0d:
|
||||
case 0x0e:
|
||||
case 0x0f:
|
||||
case 0x10:
|
||||
case 0x11:
|
||||
case 0x12:
|
||||
case 0x13:
|
||||
case 0x14:
|
||||
case 0x15:
|
||||
case 0x16:
|
||||
case 0x17:
|
||||
{
|
||||
string_t s = from_cbor_internal(v, idx);
|
||||
result += s;
|
||||
return v[current_idx];
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] >= 0x80 and v[current_idx] <= 0x97) // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const size_t len = v[current_idx] - 0x80;
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0x98) // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
idx += 1; // skip 1 size byte
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0x99) // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
idx += 2; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0x9a) // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
idx += 4; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0x9b) // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
idx += 8; // skip 8 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0x9f) // array (indefinite length)
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] >= 0xa0 and v[current_idx] <= 0xb7) // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const size_t len = v[current_idx] - 0xa0;
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0xb8) // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
idx += 1; // skip 1 size byte
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0xb9) // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
idx += 2; // skip 2 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0xba) // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
idx += 4; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0xbb) // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
idx += 8; // skip 8 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0xbf) // map (indefinite length)
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
else if (v[current_idx] == 0xf4) // false
|
||||
{
|
||||
return false;
|
||||
}
|
||||
else if (v[current_idx] == 0xf5) // true
|
||||
{
|
||||
return true;
|
||||
}
|
||||
else if (v[current_idx] == 0xf6) // null
|
||||
{
|
||||
return value_t::null;
|
||||
}
|
||||
else if (v[current_idx] == 0xf9) // Half-Precision Float
|
||||
{
|
||||
idx += 2; // skip two content bytes
|
||||
|
||||
// code from RFC 7049, Appendix D, Figure 3:
|
||||
// As half-precision floating-point numbers were only added to IEEE
|
||||
// 754 in 2008, today's programming platforms often still only have
|
||||
// limited support for them. It is very easy to include at least
|
||||
// decoding support for them even without such support. An example
|
||||
// of a small decoder for half-precision floating-point numbers in
|
||||
// the C language is shown in Figure 3.
|
||||
const int half = (v[current_idx + 1] << 8) + v[current_idx + 2];
|
||||
const int exp = (half >> 10) & 0x1f;
|
||||
const int mant = half & 0x3ff;
|
||||
double val;
|
||||
if (exp == 0)
|
||||
case 0x18: // Unsigned integer uint8_t
|
||||
{
|
||||
val = std::ldexp(mant, -24);
|
||||
idx += 1; // skip content byte
|
||||
return get_from_vector<uint8_t>(v, current_idx);
|
||||
}
|
||||
else if (exp != 31)
|
||||
{
|
||||
val = std::ldexp(mant + 1024, exp - 25);
|
||||
}
|
||||
else
|
||||
{
|
||||
val = mant == 0 ? INFINITY : NAN;
|
||||
}
|
||||
return half & 0x8000 ? -val : val;
|
||||
}
|
||||
else if (v[current_idx] == 0xfa) // Single-Precision Float
|
||||
{
|
||||
// copy bytes in reverse order into the float variable
|
||||
float res;
|
||||
for (size_t byte = 0; byte < sizeof(float); ++byte)
|
||||
{
|
||||
reinterpret_cast<uint8_t*>(&res)[sizeof(float) - byte - 1] = v[current_idx + 1 + byte];
|
||||
}
|
||||
idx += sizeof(float); // skip content bytes
|
||||
return res;
|
||||
}
|
||||
else if (v[current_idx] == 0xfb) // Double-Precision Float
|
||||
{
|
||||
// copy bytes in reverse order into the double variable
|
||||
double res;
|
||||
for (size_t byte = 0; byte < sizeof(double); ++byte)
|
||||
{
|
||||
reinterpret_cast<uint8_t*>(&res)[sizeof(double) - byte - 1] = v[current_idx + 1 + byte];
|
||||
}
|
||||
idx += sizeof(double); // skip content bytes
|
||||
return res;
|
||||
}
|
||||
|
||||
// 40..57 byte string
|
||||
// 58 byte string
|
||||
// 59 byte string
|
||||
// 5a byte string
|
||||
// 5b byte string
|
||||
// 5f byte string
|
||||
// 7f UTF-8 string with break
|
||||
// 9f array with break
|
||||
// bf map with break
|
||||
// c0 Text-based date/time
|
||||
// c1 Epoch-based date/time
|
||||
// c2 Positive bignum
|
||||
// c3 Positive bignum
|
||||
// c4 Decimal Fraction
|
||||
// c5 Bigfloat
|
||||
// c6..d4 tagged item
|
||||
// d5..d7 Expected Conversion
|
||||
// d8..db more tagged items
|
||||
// e0..f3 simple value
|
||||
// f7 undefined
|
||||
// f8 simple value
|
||||
// f9 half-precision float
|
||||
// ff break stop code
|
||||
case 0x19: // Unsigned integer uint16_t
|
||||
{
|
||||
idx += 2; // skip 2 content bytes
|
||||
return get_from_vector<uint16_t>(v, current_idx);
|
||||
}
|
||||
|
||||
throw std::invalid_argument("error parsing a CBOR @ " + std::to_string(current_idx) + ": " + std::to_string(v[current_idx]));
|
||||
case 0x1a: // Unsigned integer uint32_t
|
||||
{
|
||||
idx += 4; // skip 4 content bytes
|
||||
return get_from_vector<uint32_t>(v, current_idx);
|
||||
}
|
||||
|
||||
case 0x1b: // Unsigned integer uint64_t
|
||||
{
|
||||
idx += 8; // skip 8 content bytes
|
||||
return get_from_vector<uint64_t>(v, current_idx);
|
||||
}
|
||||
|
||||
// Negative integer
|
||||
case 0x20:
|
||||
case 0x21:
|
||||
case 0x22:
|
||||
case 0x23:
|
||||
case 0x24:
|
||||
case 0x25:
|
||||
case 0x26:
|
||||
case 0x27:
|
||||
case 0x28:
|
||||
case 0x29:
|
||||
case 0x2a:
|
||||
case 0x2b:
|
||||
case 0x2c:
|
||||
case 0x2d:
|
||||
case 0x2e:
|
||||
case 0x2f:
|
||||
case 0x30:
|
||||
case 0x31:
|
||||
case 0x32:
|
||||
case 0x33:
|
||||
case 0x34:
|
||||
case 0x35:
|
||||
case 0x36:
|
||||
case 0x37:
|
||||
{
|
||||
return static_cast<int8_t>(0x20 - 1 - v[current_idx]);
|
||||
}
|
||||
|
||||
case 0x38: // Negative integer
|
||||
{
|
||||
idx += 1; // skip content byte
|
||||
// must be uint8_t !
|
||||
return -1 - get_from_vector<uint8_t>(v, current_idx);
|
||||
}
|
||||
|
||||
case 0x39: // Negative integer
|
||||
{
|
||||
idx += 2; // skip 2 content bytes
|
||||
return -1 - get_from_vector<int16_t>(v, current_idx);
|
||||
}
|
||||
|
||||
case 0x3a: // Negative integer
|
||||
{
|
||||
idx += 4; // skip 4 content bytes
|
||||
return -1 - get_from_vector<int32_t>(v, current_idx);
|
||||
}
|
||||
|
||||
case 0x3b: // Negative integer
|
||||
{
|
||||
idx += 8; // skip 8 content bytes
|
||||
return -1 - get_from_vector<int64_t>(v, current_idx);
|
||||
}
|
||||
|
||||
// UTF-8 string
|
||||
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:
|
||||
{
|
||||
const size_t len = v[current_idx] - 0x60;
|
||||
const size_t offset = current_idx + 1;
|
||||
idx += len; // skip content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x78: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 2;
|
||||
idx += len + 1; // skip size byte + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x79: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 3;
|
||||
idx += len + 2; // skip 2 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x7a: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 5;
|
||||
idx += len + 4; // skip 4 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x7b: // UTF-8 string
|
||||
{
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
const size_t offset = current_idx + 9;
|
||||
idx += len + 8; // skip 8 size bytes + content bytes
|
||||
return std::string(reinterpret_cast<const char*>(v.data()) + offset, len);
|
||||
}
|
||||
|
||||
case 0x7f: // UTF-8 string (indefinite length)
|
||||
{
|
||||
std::string result;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
string_t s = from_cbor_internal(v, idx);
|
||||
result += s;
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
|
||||
// array
|
||||
case 0x80:
|
||||
case 0x81:
|
||||
case 0x82:
|
||||
case 0x83:
|
||||
case 0x84:
|
||||
case 0x85:
|
||||
case 0x86:
|
||||
case 0x87:
|
||||
case 0x88:
|
||||
case 0x89:
|
||||
case 0x8a:
|
||||
case 0x8b:
|
||||
case 0x8c:
|
||||
case 0x8d:
|
||||
case 0x8e:
|
||||
case 0x8f:
|
||||
case 0x90:
|
||||
case 0x91:
|
||||
case 0x92:
|
||||
case 0x93:
|
||||
case 0x94:
|
||||
case 0x95:
|
||||
case 0x96:
|
||||
case 0x97:
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const size_t len = v[current_idx] - 0x80;
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x98: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
idx += 1; // skip 1 size byte
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x99: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
idx += 2; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x9a: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
idx += 4; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x9b: // array
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
idx += 8; // skip 8 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0x9f: // array (indefinite length)
|
||||
{
|
||||
basic_json result = value_t::array;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
result.push_back(from_cbor_internal(v, idx));
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
|
||||
// map
|
||||
case 0xa0:
|
||||
case 0xa1:
|
||||
case 0xa2:
|
||||
case 0xa3:
|
||||
case 0xa4:
|
||||
case 0xa5:
|
||||
case 0xa6:
|
||||
case 0xa7:
|
||||
case 0xa8:
|
||||
case 0xa9:
|
||||
case 0xaa:
|
||||
case 0xab:
|
||||
case 0xac:
|
||||
case 0xad:
|
||||
case 0xae:
|
||||
case 0xaf:
|
||||
case 0xb0:
|
||||
case 0xb1:
|
||||
case 0xb2:
|
||||
case 0xb3:
|
||||
case 0xb4:
|
||||
case 0xb5:
|
||||
case 0xb6:
|
||||
case 0xb7:
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const size_t len = v[current_idx] - 0xa0;
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xb8: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint8_t>(v, current_idx);
|
||||
idx += 1; // skip 1 size byte
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xb9: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint16_t>(v, current_idx);
|
||||
idx += 2; // skip 2 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xba: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint32_t>(v, current_idx);
|
||||
idx += 4; // skip 4 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xbb: // map
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
const auto len = get_from_vector<uint64_t>(v, current_idx);
|
||||
idx += 8; // skip 8 size bytes
|
||||
for (size_t i = 0; i < len; ++i)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xbf: // map (indefinite length)
|
||||
{
|
||||
basic_json result = value_t::object;
|
||||
while (v[idx] != 0xff)
|
||||
{
|
||||
std::string key = from_cbor_internal(v, idx);
|
||||
result[key] = from_cbor_internal(v, idx);
|
||||
}
|
||||
// skip break byte (0xFF)
|
||||
idx += 1;
|
||||
return result;
|
||||
}
|
||||
|
||||
case 0xf4: // false
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
case 0xf5: // true
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
case 0xf6: // null
|
||||
{
|
||||
return value_t::null;
|
||||
}
|
||||
|
||||
case 0xf9: // Half-Precision Float
|
||||
{
|
||||
idx += 2; // skip two content bytes
|
||||
|
||||
// code from RFC 7049, Appendix D, Figure 3:
|
||||
// As half-precision floating-point numbers were only added to IEEE
|
||||
// 754 in 2008, today's programming platforms often still only have
|
||||
// limited support for them. It is very easy to include at least
|
||||
// decoding support for them even without such support. An example
|
||||
// of a small decoder for half-precision floating-point numbers in
|
||||
// the C language is shown in Figure 3.
|
||||
const int half = (v[current_idx + 1] << 8) + v[current_idx + 2];
|
||||
const int exp = (half >> 10) & 0x1f;
|
||||
const int mant = half & 0x3ff;
|
||||
double val;
|
||||
if (exp == 0)
|
||||
{
|
||||
val = std::ldexp(mant, -24);
|
||||
}
|
||||
else if (exp != 31)
|
||||
{
|
||||
val = std::ldexp(mant + 1024, exp - 25);
|
||||
}
|
||||
else
|
||||
{
|
||||
val = mant == 0 ? INFINITY : NAN;
|
||||
}
|
||||
return half & 0x8000 ? -val : val;
|
||||
}
|
||||
|
||||
case 0xfa: // Single-Precision Float
|
||||
{
|
||||
// copy bytes in reverse order into the float variable
|
||||
float res;
|
||||
for (size_t byte = 0; byte < sizeof(float); ++byte)
|
||||
{
|
||||
reinterpret_cast<uint8_t*>(&res)[sizeof(float) - byte - 1] = v[current_idx + 1 + byte];
|
||||
}
|
||||
idx += sizeof(float); // skip content bytes
|
||||
return res;
|
||||
}
|
||||
|
||||
case 0xfb: // Double-Precision Float
|
||||
{
|
||||
// copy bytes in reverse order into the double variable
|
||||
double res;
|
||||
for (size_t byte = 0; byte < sizeof(double); ++byte)
|
||||
{
|
||||
reinterpret_cast<uint8_t*>(&res)[sizeof(double) - byte - 1] = v[current_idx + 1 + byte];
|
||||
}
|
||||
idx += sizeof(double); // skip content bytes
|
||||
return res;
|
||||
}
|
||||
|
||||
// 40..57 byte string
|
||||
// 58 byte string
|
||||
// 59 byte string
|
||||
// 5a byte string
|
||||
// 5b byte string
|
||||
// 5f byte string
|
||||
// 7f UTF-8 string with break
|
||||
// 9f array with break
|
||||
// bf map with break
|
||||
// c0 Text-based date/time
|
||||
// c1 Epoch-based date/time
|
||||
// c2 Positive bignum
|
||||
// c3 Positive bignum
|
||||
// c4 Decimal Fraction
|
||||
// c5 Bigfloat
|
||||
// c6..d4 tagged item
|
||||
// d5..d7 Expected Conversion
|
||||
// d8..db more tagged items
|
||||
// e0..f3 simple value
|
||||
// f7 undefined
|
||||
// f8 simple value
|
||||
// f9 half-precision float
|
||||
// ff break stop code
|
||||
default:
|
||||
{
|
||||
throw std::invalid_argument("error parsing a CBOR @ " + std::to_string(current_idx) + ": " + std::to_string(v[current_idx]));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public:
|
||||
|
|
|
|||
Loading…
Reference in a new issue