mirror of
https://github.com/eledio-devices/thirdparty-ArduinoJson.git
synced 2025-10-31 16:14:11 +01:00
595 lines
15 KiB
C++
595 lines
15 KiB
C++
// ArduinoJson - https://arduinojson.org
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// Copyright © 2014-2022, Benoit BLANCHON
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// MIT License
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#pragma once
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#include <ArduinoJson/Deserialization/deserialize.hpp>
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#include <ArduinoJson/Memory/MemoryPool.hpp>
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#include <ArduinoJson/MsgPack/endianess.hpp>
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#include <ArduinoJson/MsgPack/ieee754.hpp>
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#include <ArduinoJson/Polyfills/type_traits.hpp>
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#include <ArduinoJson/Variant/VariantData.hpp>
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namespace ARDUINOJSON_NAMESPACE {
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template <typename TReader, typename TStringStorage>
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class MsgPackDeserializer {
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public:
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MsgPackDeserializer(MemoryPool &pool, TReader reader,
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TStringStorage stringStorage)
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: _pool(&pool),
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_reader(reader),
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_stringStorage(stringStorage),
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_error(DeserializationError::Ok),
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_foundSomething(false) {}
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template <typename TFilter>
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DeserializationError parse(VariantData &variant, TFilter filter,
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NestingLimit nestingLimit) {
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parseVariant(&variant, filter, nestingLimit);
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return _foundSomething ? _error : DeserializationError::EmptyInput;
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}
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private:
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bool invalidInput() {
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_error = DeserializationError::InvalidInput;
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return false;
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}
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template <typename TFilter>
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bool parseVariant(VariantData *variant, TFilter filter,
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NestingLimit nestingLimit) {
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uint8_t code = 0; // TODO: why do we need to initialize this variable?
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if (!readByte(code))
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return false;
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_foundSomething = true;
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bool allowValue = filter.allowValue();
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switch (code) {
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case 0xc0:
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// already null
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return true;
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case 0xc1:
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return invalidInput();
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case 0xc2:
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if (allowValue)
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variant->setBoolean(false);
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return true;
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case 0xc3:
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if (allowValue)
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variant->setBoolean(true);
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return true;
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case 0xc4: // bin 8 (not supported)
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return skipString<uint8_t>();
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case 0xc5: // bin 16 (not supported)
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return skipString<uint16_t>();
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case 0xc6: // bin 32 (not supported)
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return skipString<uint32_t>();
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case 0xc7: // ext 8 (not supported)
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return skipExt<uint8_t>();
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case 0xc8: // ext 16 (not supported)
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return skipExt<uint16_t>();
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case 0xc9: // ext 32 (not supported)
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return skipExt<uint32_t>();
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case 0xca:
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if (allowValue)
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return readFloat<float>(variant);
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else
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return skipBytes(4);
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case 0xcb:
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if (allowValue)
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return readDouble<double>(variant);
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else
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return skipBytes(8);
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case 0xcc:
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if (allowValue)
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return readInteger<uint8_t>(variant);
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else
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return skipBytes(1);
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case 0xcd:
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if (allowValue)
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return readInteger<uint16_t>(variant);
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else
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return skipBytes(2);
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case 0xce:
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if (allowValue)
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return readInteger<uint32_t>(variant);
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else
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return skipBytes(4);
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case 0xcf:
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#if ARDUINOJSON_USE_LONG_LONG
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if (allowValue)
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return readInteger<uint64_t>(variant);
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else
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return skipBytes(8);
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#else
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return skipBytes(8); // not supported
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#endif
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case 0xd0:
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if (allowValue)
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return readInteger<int8_t>(variant);
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else
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return skipBytes(1);
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case 0xd1:
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if (allowValue)
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return readInteger<int16_t>(variant);
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else
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return skipBytes(2);
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case 0xd2:
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if (allowValue)
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return readInteger<int32_t>(variant);
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else
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return skipBytes(4);
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case 0xd3:
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#if ARDUINOJSON_USE_LONG_LONG
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if (allowValue)
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return readInteger<int64_t>(variant);
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else
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return skipBytes(8); // not supported
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#else
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return skipBytes(8);
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#endif
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case 0xd4: // fixext 1 (not supported)
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return skipBytes(2);
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case 0xd5: // fixext 2 (not supported)
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return skipBytes(3);
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case 0xd6: // fixext 4 (not supported)
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return skipBytes(5);
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case 0xd7: // fixext 8 (not supported)
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return skipBytes(9);
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case 0xd8: // fixext 16 (not supported)
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return skipBytes(17);
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case 0xd9:
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if (allowValue)
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return readString<uint8_t>(variant);
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else
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return skipString<uint8_t>();
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case 0xda:
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if (allowValue)
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return readString<uint16_t>(variant);
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else
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return skipString<uint16_t>();
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case 0xdb:
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if (allowValue)
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return readString<uint32_t>(variant);
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else
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return skipString<uint32_t>();
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case 0xdc:
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return readArray<uint16_t>(variant, filter, nestingLimit);
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case 0xdd:
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return readArray<uint32_t>(variant, filter, nestingLimit);
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case 0xde:
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return readObject<uint16_t>(variant, filter, nestingLimit);
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case 0xdf:
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return readObject<uint32_t>(variant, filter, nestingLimit);
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}
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switch (code & 0xf0) {
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case 0x80:
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return readObject(variant, code & 0x0F, filter, nestingLimit);
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case 0x90:
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return readArray(variant, code & 0x0F, filter, nestingLimit);
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}
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if ((code & 0xe0) == 0xa0) {
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if (allowValue)
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return readString(variant, code & 0x1f);
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else
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return skipBytes(code & 0x1f);
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}
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if (allowValue)
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variant->setInteger(static_cast<int8_t>(code));
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return true;
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}
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bool readByte(uint8_t &value) {
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int c = _reader.read();
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if (c < 0) {
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_error = DeserializationError::IncompleteInput;
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return false;
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}
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value = static_cast<uint8_t>(c);
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return true;
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}
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bool readBytes(uint8_t *p, size_t n) {
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if (_reader.readBytes(reinterpret_cast<char *>(p), n) == n)
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return true;
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_error = DeserializationError::IncompleteInput;
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return false;
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}
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template <typename T>
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bool readBytes(T &value) {
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return readBytes(reinterpret_cast<uint8_t *>(&value), sizeof(value));
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}
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bool skipBytes(size_t n) {
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for (; n; --n) {
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if (_reader.read() < 0) {
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_error = DeserializationError::IncompleteInput;
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return false;
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}
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}
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return true;
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}
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template <typename T>
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bool readInteger(T &value) {
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if (!readBytes(value))
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return false;
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fixEndianess(value);
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return true;
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}
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template <typename T>
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bool readInteger(VariantData *variant) {
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T value;
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if (!readInteger(value))
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return false;
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variant->setInteger(value);
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return true;
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}
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template <typename T>
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typename enable_if<sizeof(T) == 4, bool>::type readFloat(
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VariantData *variant) {
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T value;
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if (!readBytes(value))
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return false;
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fixEndianess(value);
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variant->setFloat(value);
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return true;
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}
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template <typename T>
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typename enable_if<sizeof(T) == 8, bool>::type readDouble(
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VariantData *variant) {
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T value;
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if (!readBytes(value))
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return false;
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fixEndianess(value);
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variant->setFloat(value);
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return true;
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}
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template <typename T>
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typename enable_if<sizeof(T) == 4, bool>::type readDouble(
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VariantData *variant) {
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uint8_t i[8]; // input is 8 bytes
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T value; // output is 4 bytes
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uint8_t *o = reinterpret_cast<uint8_t *>(&value);
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if (!readBytes(i, 8))
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return false;
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doubleToFloat(i, o);
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fixEndianess(value);
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variant->setFloat(value);
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return true;
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}
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template <typename T>
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bool readString(VariantData *variant) {
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T size;
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if (!readInteger(size))
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return false;
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return readString(variant, size);
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}
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template <typename T>
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bool readString() {
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T size;
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if (!readInteger(size))
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return false;
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return readString(size);
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}
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template <typename T>
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bool skipString() {
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T size;
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if (!readInteger(size))
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return false;
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return skipBytes(size);
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}
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bool readString(VariantData *variant, size_t n) {
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if (!readString(n))
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return false;
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variant->setString(_stringStorage.save());
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return true;
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}
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bool readString(size_t n) {
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_stringStorage.startString();
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for (; n; --n) {
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uint8_t c;
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if (!readBytes(c))
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return false;
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_stringStorage.append(static_cast<char>(c));
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}
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if (!_stringStorage.isValid()) {
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_error = DeserializationError::NoMemory;
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return false;
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}
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return true;
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}
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template <typename TSize, typename TFilter>
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bool readArray(VariantData *variant, TFilter filter,
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NestingLimit nestingLimit) {
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TSize size;
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if (!readInteger(size))
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return false;
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return readArray(variant, size, filter, nestingLimit);
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}
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template <typename TFilter>
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bool readArray(VariantData *variant, size_t n, TFilter filter,
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NestingLimit nestingLimit) {
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if (nestingLimit.reached()) {
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_error = DeserializationError::TooDeep;
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return false;
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}
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bool allowArray = filter.allowArray();
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CollectionData *array = allowArray ? &variant->toArray() : 0;
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TFilter memberFilter = filter[0U];
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for (; n; --n) {
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VariantData *value;
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if (memberFilter.allow()) {
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value = array->addElement(_pool);
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if (!value) {
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_error = DeserializationError::NoMemory;
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return false;
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}
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} else {
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value = 0;
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}
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if (!parseVariant(value, memberFilter, nestingLimit.decrement()))
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return false;
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}
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return true;
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}
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template <typename TSize, typename TFilter>
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bool readObject(VariantData *variant, TFilter filter,
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NestingLimit nestingLimit) {
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TSize size;
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if (!readInteger(size))
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return false;
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return readObject(variant, size, filter, nestingLimit);
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}
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template <typename TFilter>
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bool readObject(VariantData *variant, size_t n, TFilter filter,
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NestingLimit nestingLimit) {
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if (nestingLimit.reached()) {
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_error = DeserializationError::TooDeep;
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return false;
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}
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CollectionData *object = filter.allowObject() ? &variant->toObject() : 0;
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for (; n; --n) {
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if (!readKey())
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return false;
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String key = _stringStorage.str();
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TFilter memberFilter = filter[key.c_str()];
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VariantData *member;
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if (memberFilter.allow()) {
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// Save key in memory pool.
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// This MUST be done before adding the slot.
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key = _stringStorage.save();
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VariantSlot *slot = object->addSlot(_pool);
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if (!slot) {
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_error = DeserializationError::NoMemory;
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return false;
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}
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slot->setKey(key);
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member = slot->data();
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} else {
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member = 0;
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}
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if (!parseVariant(member, memberFilter, nestingLimit.decrement()))
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return false;
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}
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return true;
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}
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bool readKey() {
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uint8_t code;
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if (!readByte(code))
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return false;
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if ((code & 0xe0) == 0xa0)
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return readString(code & 0x1f);
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switch (code) {
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case 0xd9:
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return readString<uint8_t>();
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case 0xda:
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return readString<uint16_t>();
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case 0xdb:
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return readString<uint32_t>();
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default:
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return invalidInput();
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}
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}
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template <typename T>
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bool skipExt() {
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T size;
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if (!readInteger(size))
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return false;
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return skipBytes(size + 1);
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}
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MemoryPool *_pool;
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TReader _reader;
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TStringStorage _stringStorage;
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DeserializationError _error;
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bool _foundSomething;
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};
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//
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// deserializeMsgPack(JsonDocument&, const std::string&, ...)
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//
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// ... = NestingLimit
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template <typename TString>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, const TString &input,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit,
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AllowAllFilter());
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}
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// ... = Filter, NestingLimit
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template <typename TString>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, const TString &input, Filter filter,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit, filter);
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}
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// ... = NestingLimit, Filter
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template <typename TString>
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DeserializationError deserializeMsgPack(JsonDocument &doc, const TString &input,
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NestingLimit nestingLimit,
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Filter filter) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit, filter);
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}
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//
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// deserializeMsgPack(JsonDocument&, std::istream&, ...)
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//
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// ... = NestingLimit
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template <typename TStream>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, TStream &input,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit,
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AllowAllFilter());
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}
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// ... = Filter, NestingLimit
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template <typename TStream>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, TStream &input, Filter filter,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit, filter);
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}
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// ... = NestingLimit, Filter
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template <typename TStream>
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DeserializationError deserializeMsgPack(JsonDocument &doc, TStream &input,
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NestingLimit nestingLimit,
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Filter filter) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit, filter);
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}
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//
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// deserializeMsgPack(JsonDocument&, char*, ...)
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//
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// ... = NestingLimit
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template <typename TChar>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, TChar *input,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit,
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AllowAllFilter());
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}
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// ... = Filter, NestingLimit
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template <typename TChar>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, TChar *input, Filter filter,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit, filter);
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}
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// ... = NestingLimit, Filter
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template <typename TChar>
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DeserializationError deserializeMsgPack(JsonDocument &doc, TChar *input,
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NestingLimit nestingLimit,
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Filter filter) {
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return deserialize<MsgPackDeserializer>(doc, input, nestingLimit, filter);
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}
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//
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// deserializeMsgPack(JsonDocument&, char*, size_t, ...)
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//
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// ... = NestingLimit
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template <typename TChar>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, TChar *input, size_t inputSize,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, inputSize, nestingLimit,
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AllowAllFilter());
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}
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// ... = Filter, NestingLimit
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template <typename TChar>
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DeserializationError deserializeMsgPack(
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JsonDocument &doc, TChar *input, size_t inputSize, Filter filter,
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NestingLimit nestingLimit = NestingLimit()) {
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return deserialize<MsgPackDeserializer>(doc, input, inputSize, nestingLimit,
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filter);
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}
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// ... = NestingLimit, Filter
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template <typename TChar>
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DeserializationError deserializeMsgPack(JsonDocument &doc, TChar *input,
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size_t inputSize,
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NestingLimit nestingLimit,
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Filter filter) {
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return deserialize<MsgPackDeserializer>(doc, input, inputSize, nestingLimit,
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filter);
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}
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} // namespace ARDUINOJSON_NAMESPACE
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