Added serializeMsgPack() and measureMsgPack() (closes #358)

.gitignore

@@ -9,3 +9,4 @@
 /fuzzing/*_fuzzer
 /fuzzing/*_fuzzer.options
 /fuzzing/*_fuzzer_seed_corpus.zip
+.vs/

CHANGELOG.md

@@ -10,7 +10,7 @@ HEAD
 * Added `deserializeJson()`
 * Added `serializeJson()` and `serializeJsonPretty()`
 * Added `measureJson()` and `measureJsonPretty()`
-* Added `deserializeMsgPack()` (issue #358)
+* Added `serializeMsgPack()`, `deserializeMsgPack()` and `measureMsgPack()` (issue #358)
 * Added example `MsgPackParser.ino` (issue #358)
 * Added support for non zero-terminated strings (issue #704)
 * Removed `JsonBuffer::parseArray()`, `parseObject()` and `parse()`

src/ArduinoJson.hpp

@@ -5,11 +5,13 @@
 #pragma once
 
 #include "ArduinoJson/DynamicJsonDocument.hpp"
-#include "ArduinoJson/StaticJsonDocument.hpp"
-#include "ArduinoJson/deserializeJson.hpp"
-#include "ArduinoJson/deserializeMsgPack.hpp"
-
+#include "ArduinoJson/Json/JsonDeserializer.hpp"
 #include "ArduinoJson/Json/JsonSerializer.hpp"
+#include "ArduinoJson/Json/PrettyJsonSerializer.hpp"
+#include "ArduinoJson/MsgPack/MsgPackDeserializer.hpp"
+#include "ArduinoJson/MsgPack/MsgPackSerializer.hpp"
+#include "ArduinoJson/StaticJsonDocument.hpp"
+
 #include "ArduinoJson/JsonArrayImpl.hpp"
 #include "ArduinoJson/JsonObjectImpl.hpp"
 #include "ArduinoJson/JsonVariantImpl.hpp"

src/ArduinoJson/Deserialization/deserialize.hpp

@@ -0,0 +1,82 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../StringStorage/StringStorage.hpp"
+#include "./ArduinoStreamReader.hpp"
+#include "./CharPointerReader.hpp"
+#include "./DeserializationError.hpp"
+#include "./FlashStringReader.hpp"
+#include "./IteratorReader.hpp"
+#include "./StdStreamReader.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <template <typename, typename> class TDeserializer,
+          typename TJsonBuffer, typename TReader, typename TWriter>
+TDeserializer<TReader, TWriter> makeDeserializer(TJsonBuffer *buffer,
+                                                 TReader reader, TWriter writer,
+                                                 uint8_t nestingLimit) {
+  return TDeserializer<TReader, TWriter>(buffer, reader, writer, nestingLimit);
+}
+
+// DeserializationError deserialize(TDocument& doc, TString input);
+// TDocument = DynamicJsonDocument, StaticJsonDocument
+// TString = const std::string&, const String&
+template <template <typename, typename> class TDeserializer, typename TDocument,
+          typename TString>
+typename Internals::enable_if<!Internals::is_array<TString>::value,
+                              DeserializationError>::type
+deserialize(TDocument &doc, const TString &input) {
+  using namespace Internals;
+  return makeDeserializer<TDeserializer>(&doc.buffer(), makeReader(input),
+                                         makeStringStorage(doc.buffer(), input),
+                                         doc.nestingLimit)
+      .parse(doc.template to<JsonVariant>());
+}
+//
+// DeserializationError deserialize(TDocument& doc, TChar* input);
+// TDocument = DynamicJsonDocument, StaticJsonDocument
+// TChar* = char*, const char*, const FlashStringHelper*
+template <template <typename, typename> class TDeserializer, typename TDocument,
+          typename TChar>
+DeserializationError deserialize(TDocument &doc, TChar *input) {
+  using namespace Internals;
+  return makeDeserializer<TDeserializer>(&doc.buffer(), makeReader(input),
+                                         makeStringStorage(doc.buffer(), input),
+                                         doc.nestingLimit)
+      .parse(doc.template to<JsonVariant>());
+}
+//
+// DeserializationError deserialize(TDocument& doc, TChar* input, size_t
+// inputSize);
+// TDocument = DynamicJsonDocument, StaticJsonDocument
+// TChar* = char*, const char*, const FlashStringHelper*
+template <template <typename, typename> class TDeserializer, typename TDocument,
+          typename TChar>
+DeserializationError deserialize(TDocument &doc, TChar *input,
+                                 size_t inputSize) {
+  using namespace Internals;
+  return makeDeserializer<TDeserializer>(
+             &doc.buffer(), makeReader(input, inputSize),
+             makeStringStorage(doc.buffer(), input), doc.nestingLimit)
+      .parse(doc.template to<JsonVariant>());
+}
+//
+// DeserializationError deserialize(TDocument& doc, TStream input);
+// TDocument = DynamicJsonDocument, StaticJsonDocument
+// TStream = std::istream&, Stream&
+template <template <typename, typename> class TDeserializer, typename TDocument,
+          typename TStream>
+DeserializationError deserialize(TDocument &doc, TStream &input) {
+  using namespace Internals;
+  return makeDeserializer<TDeserializer>(&doc.buffer(), makeReader(input),
+                                         makeStringStorage(doc.buffer(), input),
+                                         doc.nestingLimit)
+      .parse(doc.template to<JsonVariant>());
+}
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/DynamicJsonDocument.hpp

@@ -79,7 +79,7 @@ class DynamicJsonDocument {
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor& visitor) const {
     return _root.visit(visitor);
   }
 };

src/ArduinoJson/Json/JsonDeserializer.hpp

@@ -4,24 +4,23 @@
 
 #pragma once
 
-#include "../DeserializationError.hpp"
+#include "../Deserialization/deserialize.hpp"
 #include "../JsonVariant.hpp"
 #include "../Memory/JsonBuffer.hpp"
 #include "../Polyfills/type_traits.hpp"
-#include "../Reading/Reader.hpp"
 #include "./EscapeSequence.hpp"
 
 namespace ArduinoJson {
 namespace Internals {
 
-template <typename TReader, typename TWriter>
+template <typename TReader, typename TStringStorage>
 class JsonDeserializer {
  public:
-  JsonDeserializer(JsonBuffer *buffer, TReader reader, TWriter writer,
-                   uint8_t nestingLimit)
+  JsonDeserializer(JsonBuffer *buffer, TReader reader,
+                   TStringStorage stringStorage, uint8_t nestingLimit)
       : _buffer(buffer),
         _reader(reader),
-        _writer(writer),
+        _stringStorage(stringStorage),
         _nestingLimit(nestingLimit),
         _loaded(false) {}
   DeserializationError parse(JsonVariant &variant) {
@@ -168,8 +167,8 @@ class JsonDeserializer {
   }
 
   DeserializationError parseString(const char **result) {
-    typename remove_reference<TWriter>::type::String str =
-        _writer.startString();
+    typename remove_reference<TStringStorage>::type::String str =
+        _stringStorage.startString();
 
     char c = current();
     if (c == '\0') return DeserializationError::IncompleteInput;
@@ -285,19 +284,35 @@ class JsonDeserializer {
 
   JsonBuffer *_buffer;
   TReader _reader;
-  TWriter _writer;
+  TStringStorage _stringStorage;
   uint8_t _nestingLimit;
   char _current;
   bool _loaded;
 };
-
-template <typename TJsonBuffer, typename TReader, typename TWriter>
-JsonDeserializer<TReader, TWriter> makeJsonDeserializer(TJsonBuffer *buffer,
-                                                        TReader reader,
-                                                        TWriter writer,
-                                                        uint8_t nestingLimit) {
-  return JsonDeserializer<TReader, TWriter>(buffer, reader, writer,
-                                            nestingLimit);
-}
 }  // namespace Internals
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeJson(TDocument &doc, const TInput &input) {
+  using namespace Internals;
+  return deserialize<JsonDeserializer>(doc, input);
+}
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeJson(TDocument &doc, TInput *input) {
+  using namespace Internals;
+  return deserialize<JsonDeserializer>(doc, input);
+}
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeJson(TDocument &doc, TInput *input,
+                                     size_t inputSize) {
+  using namespace Internals;
+  return deserialize<JsonDeserializer>(doc, input, inputSize);
+}
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeJson(TDocument &doc, TInput &input) {
+  using namespace Internals;
+  return deserialize<JsonDeserializer>(doc, input);
+}
 }  // namespace ArduinoJson

src/ArduinoJson/Json/JsonSerializer.hpp

@@ -4,37 +4,24 @@
 
 #pragma once
 
-#include "../Print/DummyPrint.hpp"
-#include "../Print/DynamicStringBuilder.hpp"
-#include "../Print/StaticStringBuilder.hpp"
-#include "./IndentedPrint.hpp"
+#include "../Serialization/measure.hpp"
+#include "../Serialization/serialize.hpp"
 #include "./JsonWriter.hpp"
-#include "./Prettyfier.hpp"
-
-#if ARDUINOJSON_ENABLE_STD_STREAM
-#include "../Print/StreamPrintAdapter.hpp"
-#endif
 
 namespace ArduinoJson {
 namespace Internals {
 
-template <typename Writer>
+template <typename TPrint>
 class JsonSerializer {
  public:
-  template <typename TSource>
-  static void serialize(const TSource &source, Writer &writer) {
-    source.visit(Visitor(&writer));
-  }
-
-  struct Visitor {
-    Visitor(Writer *writer) : _writer(writer) {}
+  JsonSerializer(TPrint &destination) : _writer(destination) {}
 
   void acceptFloat(JsonFloat value) {
-      _writer->writeFloat(value);
+    _writer.writeFloat(value);
   }
 
   void acceptArray(const JsonArray &array) {
-      _writer->beginArray();
+    _writer.beginArray();
 
     JsonArray::const_iterator it = array.begin();
     while (it != array.end()) {
@@ -43,141 +30,79 @@ class JsonSerializer {
       ++it;
       if (it == array.end()) break;
 
-        _writer->writeComma();
+      _writer.writeComma();
     }
 
-      _writer->endArray();
+    _writer.endArray();
   }
 
   void acceptObject(const JsonObject &object) {
-      _writer->beginObject();
+    _writer.beginObject();
 
     JsonObject::const_iterator it = object.begin();
     while (it != object.end()) {
-        _writer->writeString(it->key);
-        _writer->writeColon();
+      _writer.writeString(it->key);
+      _writer.writeColon();
       it->value.visit(*this);
 
       ++it;
       if (it == object.end()) break;
 
-        _writer->writeComma();
+      _writer.writeComma();
     }
 
-      _writer->endObject();
+    _writer.endObject();
   }
 
   void acceptString(const char *value) {
-      _writer->writeString(value);
+    _writer.writeString(value);
   }
 
   void acceptRawJson(const char *value) {
-      _writer->writeRaw(value);
+    _writer.writeRaw(value);
   }
 
   void acceptNegativeInteger(JsonUInt value) {
-      _writer->writeRaw('-');
-      _writer->writeInteger(value);
+    _writer.writeRaw('-');
+    _writer.writeInteger(value);
   }
 
   void acceptPositiveInteger(JsonUInt value) {
-      _writer->writeInteger(value);
+    _writer.writeInteger(value);
   }
 
   void acceptBoolean(bool value) {
-      _writer->writeBoolean(value);
+    _writer.writeBoolean(value);
   }
 
   void acceptUndefined() {}
 
-    Writer *_writer;
-  };
+  size_t bytesWritten() const {
+    return _writer.bytesWritten();
+  }
+
+ private:
+  JsonWriter<TPrint> _writer;
 };
+
 }  // namespace Internals
 
 template <typename TSource, typename TDestination>
-typename Internals::enable_if<
-    !Internals::StringTraits<TDestination>::has_append, size_t>::type
-serializeJson(const TSource &source, TDestination &destination) {
-  Internals::JsonWriter<TDestination> writer(destination);
-  Internals::JsonSerializer<Internals::JsonWriter<TDestination> >::serialize(
-      source, writer);
-  return writer.bytesWritten();
+size_t serializeJson(TSource &source, TDestination &destination) {
+  using namespace Internals;
+  return serialize<JsonSerializer>(source, destination);
 }
 
-#if ARDUINOJSON_ENABLE_STD_STREAM
-template <typename TSource>
-std::ostream &serializeJson(const TSource &source, std::ostream &os) {
-  Internals::StreamPrintAdapter adapter(os);
-  serializeJson(source, adapter);
-  return os;
-}
-#endif
-
 template <typename TSource>
 size_t serializeJson(const TSource &source, char *buffer, size_t bufferSize) {
-  Internals::StaticStringBuilder sb(buffer, bufferSize);
-  return serializeJson(source, sb);
-}
-
-template <typename TSource, size_t N>
-size_t serializeJson(const TSource &source, char (&buffer)[N]) {
-  return serializeJson(source, buffer, N);
-}
-
-template <typename TSource, typename TDestination>
-typename Internals::enable_if<Internals::StringTraits<TDestination>::has_append,
-                              size_t>::type
-serializeJson(const TSource &source, TDestination &str) {
-  Internals::DynamicStringBuilder<TDestination> sb(str);
-  return serializeJson(source, sb);
-}
-
-template <typename TSource, typename TDestination>
-size_t serializeJsonPretty(const TSource &source,
-                           Internals::IndentedPrint<TDestination> &print) {
-  Internals::Prettyfier<TDestination> p(print);
-  return serializeJson(source, p);
-}
-
-template <typename TSource>
-size_t serializeJsonPretty(const TSource &source, char *buffer,
-                           size_t bufferSize) {
-  Internals::StaticStringBuilder sb(buffer, bufferSize);
-  return serializeJsonPretty(source, sb);
-}
-
-template <typename TSource, size_t N>
-size_t serializeJsonPretty(const TSource &source, char (&buffer)[N]) {
-  return serializeJsonPretty(source, buffer, N);
-}
-
-template <typename TSource, typename TDestination>
-typename Internals::enable_if<
-    !Internals::StringTraits<TDestination>::has_append, size_t>::type
-serializeJsonPretty(const TSource &source, TDestination &print) {
-  Internals::IndentedPrint<TDestination> indentedPrint(print);
-  return serializeJsonPretty(source, indentedPrint);
-}
-
-template <typename TSource, typename TDestination>
-typename Internals::enable_if<Internals::StringTraits<TDestination>::has_append,
-                              size_t>::type
-serializeJsonPretty(const TSource &source, TDestination &str) {
-  Internals::DynamicStringBuilder<TDestination> sb(str);
-  return serializeJsonPretty(source, sb);
+  using namespace Internals;
+  return serialize<JsonSerializer>(source, buffer, bufferSize);
 }
 
 template <typename TSource>
 size_t measureJson(const TSource &source) {
-  Internals::DummyPrint dp;
-  return serializeJson(source, dp);
-}
-
-template <typename TSource>
-size_t measureJsonPretty(const TSource &source) {
-  Internals::DummyPrint dp;
-  return serializeJsonPretty(source, dp);
+  using namespace Internals;
+  return measure<JsonSerializer>(source);
 }
 
 #if ARDUINOJSON_ENABLE_STD_STREAM

src/ArduinoJson/Json/PrettyJsonSerializer.hpp

@@ -0,0 +1,57 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../Serialization/measure.hpp"
+#include "../Serialization/serialize.hpp"
+#include "./IndentedPrint.hpp"
+#include "./JsonSerializer.hpp"
+#include "./Prettyfier.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <typename TPrint>
+class PrettyJsonSerializer_Base {
+ public:
+  PrettyJsonSerializer_Base(TPrint &output)
+      : _indentedPrint(output), _prettyfier(_indentedPrint) {}
+
+ protected:
+  IndentedPrint<TPrint> _indentedPrint;
+  Prettyfier<TPrint> _prettyfier;
+};
+
+template <typename TPrint>
+class PrettyJsonSerializer : PrettyJsonSerializer_Base<TPrint>,
+                             public JsonSerializer<Prettyfier<TPrint> > {
+ public:
+  PrettyJsonSerializer(TPrint &output)
+      : PrettyJsonSerializer_Base<TPrint>(output),
+        JsonSerializer<Prettyfier<TPrint> >(
+            PrettyJsonSerializer_Base<TPrint>::_prettyfier) {}
+};
+}  // namespace Internals
+
+template <typename TSource, typename TDestination>
+size_t serializeJsonPretty(TSource &source, TDestination &destination) {
+  using namespace Internals;
+  return serialize<PrettyJsonSerializer>(source, destination);
+}
+
+template <typename TSource>
+size_t serializeJsonPretty(const TSource &source, char *buffer,
+                           size_t bufferSize) {
+  using namespace Internals;
+  return serialize<PrettyJsonSerializer>(source, buffer, bufferSize);
+}
+
+template <typename TSource>
+size_t measureJsonPretty(const TSource &source) {
+  using namespace Internals;
+  return measure<PrettyJsonSerializer>(source);
+}
+
+}  // namespace ArduinoJson

src/ArduinoJson/JsonArray.hpp

@@ -179,7 +179,7 @@ class JsonArray : public Internals::ReferenceType,
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor &visitor) const {
     return visitor.acceptArray(*this);
   }
 

src/ArduinoJson/JsonArraySubscript.hpp

@@ -75,7 +75,7 @@ class JsonArraySubscript : public JsonVariantBase<JsonArraySubscript> {
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor& visitor) const {
     return _array.get<JsonVariant>(_index).visit(visitor);
   }
 

src/ArduinoJson/JsonObject.hpp

@@ -227,7 +227,7 @@ class JsonObject : public Internals::ReferenceType,
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor& visitor) const {
     return visitor.acceptObject(*this);
   }
 

src/ArduinoJson/JsonObjectSubscript.hpp

@@ -83,7 +83,7 @@ class JsonObjectSubscript
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor& visitor) const {
     return _object.get<JsonVariant>(_key).visit(visitor);
   }
 

src/ArduinoJson/JsonVariant.hpp

@@ -70,7 +70,7 @@ class JsonVariant : public Internals::JsonVariantBase<JsonVariant> {
       _content.asInteger = static_cast<JsonUInt>(value);
     } else {
       _type = JSON_NEGATIVE_INTEGER;
-      _content.asInteger = static_cast<JsonUInt>(-value);
+      _content.asInteger = ~static_cast<JsonUInt>(value) + 1;
     }
   }
   // JsonVariant(unsigned short)
@@ -308,7 +308,7 @@ class JsonVariant : public Internals::JsonVariantBase<JsonVariant> {
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor &visitor) const {
     using namespace Internals;
     switch (_type) {
       case JSON_FLOAT:

src/ArduinoJson/MsgPack/MsgPackDeserializer.hpp

@@ -4,26 +4,24 @@
 
 #pragma once
 
-#include "../DeserializationError.hpp"
+#include "../Deserialization/deserialize.hpp"
 #include "../JsonVariant.hpp"
 #include "../Memory/JsonBuffer.hpp"
 #include "../Polyfills/type_traits.hpp"
-#include "../Reading/Reader.hpp"
-#include "../Writing/Writer.hpp"
 #include "./endianess.hpp"
 #include "./ieee754.hpp"
 
 namespace ArduinoJson {
 namespace Internals {
 
-template <typename TReader, typename TWriter>
+template <typename TReader, typename TStringStorage>
 class MsgPackDeserializer {
  public:
-  MsgPackDeserializer(JsonBuffer *buffer, TReader reader, TWriter writer,
-                      uint8_t nestingLimit)
+  MsgPackDeserializer(JsonBuffer *buffer, TReader reader,
+                      TStringStorage stringStorage, uint8_t nestingLimit)
       : _buffer(buffer),
         _reader(reader),
-        _writer(writer),
+        _stringStorage(stringStorage),
         _nestingLimit(nestingLimit) {}
 
   DeserializationError parse(JsonVariant &variant) {
@@ -221,8 +219,8 @@ class MsgPackDeserializer {
   }
 
   DeserializationError readString(JsonVariant &variant, size_t n) {
-    typename remove_reference<TWriter>::type::String str =
-        _writer.startString();
+    typename remove_reference<TStringStorage>::type::String str =
+        _stringStorage.startString();
     for (; n; --n) {
       uint8_t c;
       if (!readBytes(c)) return DeserializationError::IncompleteInput;
@@ -295,15 +293,33 @@ class MsgPackDeserializer {
 
   JsonBuffer *_buffer;
   TReader _reader;
-  TWriter _writer;
+  TStringStorage _stringStorage;
   uint8_t _nestingLimit;
 };
-
-template <typename TJsonBuffer, typename TReader, typename TWriter>
-MsgPackDeserializer<TReader, TWriter> makeMsgPackDeserializer(
-    TJsonBuffer *buffer, TReader reader, TWriter writer, uint8_t nestingLimit) {
-  return MsgPackDeserializer<TReader, TWriter>(buffer, reader, writer,
-                                               nestingLimit);
-}
 }  // namespace Internals
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeMsgPack(TDocument &doc, const TInput &input) {
+  using namespace Internals;
+  return deserialize<MsgPackDeserializer>(doc, input);
+}
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeMsgPack(TDocument &doc, TInput *input) {
+  using namespace Internals;
+  return deserialize<MsgPackDeserializer>(doc, input);
+}
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeMsgPack(TDocument &doc, TInput *input,
+                                        size_t inputSize) {
+  using namespace Internals;
+  return deserialize<MsgPackDeserializer>(doc, input, inputSize);
+}
+
+template <typename TDocument, typename TInput>
+DeserializationError deserializeMsgPack(TDocument &doc, TInput &input) {
+  using namespace Internals;
+  return deserialize<MsgPackDeserializer>(doc, input);
+}
 }  // namespace ArduinoJson

src/ArduinoJson/MsgPack/MsgPackSerializer.hpp

@@ -0,0 +1,191 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "../JsonVariant.hpp"
+#include "../Polyfills/type_traits.hpp"
+#include "../Serialization/measure.hpp"
+#include "../Serialization/serialize.hpp"
+#include "./endianess.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <typename TPrint>
+class MsgPackSerializer {
+ public:
+  MsgPackSerializer(TPrint& output) : _output(&output), _bytesWritten(0) {}
+
+  template <typename T>
+  typename enable_if<sizeof(T) == 4>::type acceptFloat(T value32) {
+    writeByte(0xCA);
+    writeInteger(value32);
+  }
+
+  template <typename T>
+  typename enable_if<sizeof(T) == 8>::type acceptFloat(T value64) {
+    float value32 = float(value64);
+    if (value32 == value64) {
+      writeByte(0xCA);
+      writeInteger(value32);
+    } else {
+      writeByte(0xCB);
+      writeInteger(value64);
+    }
+  }
+
+  void acceptArray(const JsonArray& array) {
+    size_t n = array.size();
+    if (n < 0x10) {
+      writeByte(uint8_t(0x90 + array.size()));
+    } else if (n < 0x10000) {
+      writeByte(0xDC);
+      writeInteger(uint16_t(n));
+    } else {
+      writeByte(0xDD);
+      writeInteger(uint32_t(n));
+    }
+    for (JsonArray::const_iterator it = array.begin(); it != array.end();
+         ++it) {
+      it->visit(*this);
+    }
+  }
+
+  void acceptObject(const JsonObject& object) {
+    size_t n = object.size();
+    if (n < 0x10) {
+      writeByte(uint8_t(0x80 + n));
+    } else if (n < 0x10000) {
+      writeByte(0xDE);
+      writeInteger(uint16_t(n));
+    } else {
+      writeByte(0xDF);
+      writeInteger(uint32_t(n));
+    }
+    for (JsonObject::const_iterator it = object.begin(); it != object.end();
+         ++it) {
+      acceptString(it->key);
+      it->value.visit(*this);
+    }
+  }
+
+  void acceptString(const char* value) {
+    if (!value) return writeByte(0xC0);  // nil
+
+    size_t n = strlen(value);
+
+    if (n < 0x20) {
+      writeByte(uint8_t(0xA0 + n));
+    } else if (n < 0x100) {
+      writeByte(0xD9);
+      writeInteger(uint8_t(n));
+    } else if (n < 0x10000) {
+      writeByte(0xDA);
+      writeInteger(uint16_t(n));
+    } else {
+      writeByte(0xDB);
+      writeInteger(uint32_t(n));
+    }
+    writeBytes(reinterpret_cast<const uint8_t*>(value), n);
+  }
+
+  void acceptRawJson(const char* /*value*/) {}
+
+  void acceptNegativeInteger(JsonUInt value) {
+    JsonUInt negated = JsonUInt(~value + 1);
+    if (value <= 0x20) {
+      writeInteger(int8_t(negated));
+    } else if (value <= 0x80) {
+      writeByte(0xD0);
+      writeInteger(int8_t(negated));
+    } else if (value <= 0x8000) {
+      writeByte(0xD1);
+      writeInteger(int16_t(negated));
+    } else if (value <= 0x80000000) {
+      writeByte(0xD2);
+      writeInteger(int32_t(negated));
+    }
+#if ARDUINOJSON_USE_LONG_LONG || ARDUINOJSON_USE_INT64
+    else {
+      writeByte(0xD3);
+      writeInteger(int64_t(negated));
+    }
+#endif
+  }
+
+  void acceptPositiveInteger(JsonUInt value) {
+    if (value <= 0x7F) {
+      writeInteger(uint8_t(value));
+    } else if (value <= 0xFF) {
+      writeByte(0xCC);
+      writeInteger(uint8_t(value));
+    } else if (value <= 0xFFFF) {
+      writeByte(0xCD);
+      writeInteger(uint16_t(value));
+    } else if (value <= 0xFFFFFFFF) {
+      writeByte(0xCE);
+      writeInteger(uint32_t(value));
+    }
+#if ARDUINOJSON_USE_LONG_LONG || ARDUINOJSON_USE_INT64
+    else {
+      writeByte(0xCF);
+      writeInteger(uint64_t(value));
+    }
+#endif
+  }
+
+  void acceptBoolean(bool value) {
+    writeByte(value ? 0xC3 : 0xC2);
+  }
+
+  void acceptUndefined() {
+    writeByte(0xC0);
+  }
+
+  size_t bytesWritten() const {
+    return _bytesWritten;
+  }
+
+ private:
+  void writeByte(uint8_t c) {
+    _output->print(char(c));
+    _bytesWritten++;
+  }
+
+  void writeBytes(const uint8_t* c, size_t n) {
+    for (; n > 0; --n, ++c) writeByte(*c);
+  }
+
+  template <typename T>
+  void writeInteger(T value) {
+    fixEndianess(value);
+    writeBytes(reinterpret_cast<uint8_t*>(&value), sizeof(value));
+  }
+
+  TPrint* _output;
+  size_t _bytesWritten;
+};
+}  // namespace Internals
+
+template <typename TSource, typename TDestination>
+inline size_t serializeMsgPack(const TSource& source, TDestination& output) {
+  using namespace Internals;
+  return serialize<MsgPackSerializer>(source, output);
+}
+
+template <typename TSource, typename TDestination>
+inline size_t serializeMsgPack(const TSource& source, TDestination* output,
+                               size_t size) {
+  using namespace Internals;
+  return serialize<MsgPackSerializer>(source, output, size);
+}
+
+template <typename TSource>
+inline size_t measureMsgPack(const TSource& source) {
+  using namespace Internals;
+  return measure<MsgPackSerializer>(source);
+}
+
+}  // namespace ArduinoJson

src/ArduinoJson/MsgPack/endianess.hpp

@@ -5,17 +5,11 @@
 #pragma once
 
 #include "../Polyfills/type_traits.hpp"
+#include "../Polyfills/utility.hpp"
 
 namespace ArduinoJson {
 namespace Internals {
 
-template <typename T>
-inline void swap(T& a, T& b) {
-  T t(a);
-  a = b;
-  b = t;
-}
-
 inline void fixEndianess(uint8_t* p, integral_constant<size_t, 8>) {
   swap(p[0], p[7]);
   swap(p[1], p[6]);

src/ArduinoJson/Polyfills/utility.hpp

@@ -0,0 +1,16 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+namespace ArduinoJson {
+namespace Internals {
+template <typename T>
+inline void swap(T& a, T& b) {
+  T t(a);
+  a = b;
+  b = t;
+}
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/Reading/Reader.hpp

@@ -1,11 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "./ArduinoStreamReader.hpp"
-#include "./CharPointerReader.hpp"
-#include "./FlashStringReader.hpp"
-#include "./IteratorReader.hpp"
-#include "./StdStreamReader.hpp"

src/ArduinoJson/Serialization/DummyPrint.hpp

@@ -7,7 +7,6 @@
 namespace ArduinoJson {
 namespace Internals {
 
-// A dummy Print implementation used in measureJson()
 class DummyPrint {
  public:
   size_t print(char) {

src/ArduinoJson/Serialization/StaticStringBuilder.hpp

@@ -32,5 +32,5 @@ class StaticStringBuilder {
   char *end;
   char *p;
 };
-}
-}
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/Serialization/measure.hpp

@@ -0,0 +1,21 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "./DummyPrint.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <template <typename> class TSerializer, typename TSource>
+size_t measure(const TSource &source) {
+  DummyPrint dp;
+  TSerializer<DummyPrint> serializer(dp);
+  source.visit(serializer);
+  return serializer.bytesWritten();
+}
+
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/Serialization/serialize.hpp

@@ -0,0 +1,55 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "./DynamicStringBuilder.hpp"
+#include "./StaticStringBuilder.hpp"
+
+#if ARDUINOJSON_ENABLE_STD_STREAM
+#include "./StreamPrintAdapter.hpp"
+#endif
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <template <typename> class TSerializer, typename TSource,
+          typename TPrint>
+typename enable_if<!StringTraits<TPrint>::has_append, size_t>::type serialize(
+    const TSource &source, TPrint &destination) {
+  TSerializer<TPrint> serializer(destination);
+  source.visit(serializer);
+  return serializer.bytesWritten();
+}
+
+#if ARDUINOJSON_ENABLE_STD_STREAM
+template <template <typename> class TSerializer, typename TSource>
+size_t serialize(const TSource &source, std::ostream &os) {
+  StreamPrintAdapter adapter(os);
+  return serialize<TSerializer>(source, adapter);
+}
+#endif
+
+template <template <typename> class TSerializer, typename TSource>
+size_t serialize(const TSource &source, char *buffer, size_t bufferSize) {
+  StaticStringBuilder sb(buffer, bufferSize);
+  return serialize<TSerializer>(source, sb);
+}
+
+template <template <typename> class TSerializer, typename TSource, size_t N>
+size_t serialize(const TSource &source, char (&buffer)[N]) {
+  StaticStringBuilder sb(buffer, N);
+  return serialize<TSerializer>(source, sb);
+}
+
+template <template <typename> class TSerializer, typename TSource,
+          typename TString>
+typename enable_if<StringTraits<TString>::has_append, size_t>::type serialize(
+    const TSource &source, TString &str) {
+  DynamicStringBuilder<TString> sb(str);
+  return serialize<TSerializer>(source, sb);
+}
+
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/StaticJsonDocument.hpp

@@ -76,7 +76,7 @@ class StaticJsonDocument {
   }
 
   template <typename Visitor>
-  void visit(Visitor visitor) const {
+  void visit(Visitor& visitor) const {
     return _root.visit(visitor);
   }
 };

src/ArduinoJson/StringStorage/StringCopier.hpp

@@ -4,15 +4,13 @@
 
 #pragma once
 
-#include "./StringWriter.hpp"
-
 namespace ArduinoJson {
 namespace Internals {
 
 template <typename TJsonBuffer>
-class JsonBufferWriter {
+class StringCopier {
  public:
-  JsonBufferWriter(TJsonBuffer& jb) : _jb(&jb) {}
+  StringCopier(TJsonBuffer& jb) : _jb(&jb) {}
 
   typedef typename TJsonBuffer::String String;
 

src/ArduinoJson/StringStorage/StringMover.hpp

@@ -8,7 +8,7 @@ namespace ArduinoJson {
 namespace Internals {
 
 template <typename TChar>
-class StringWriter {
+class StringMover {
  public:
   class String {
    public:
@@ -28,7 +28,7 @@ class StringWriter {
     TChar* _startPtr;
   };
 
-  StringWriter(TChar* buffer) : _ptr(buffer) {}
+  StringMover(TChar* buffer) : _ptr(buffer) {}
 
   String startString() {
     return String(&_ptr);
@@ -37,5 +37,5 @@ class StringWriter {
  private:
   TChar* _ptr;
 };
-}
-}
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/StringStorage/StringStorage.hpp

@@ -0,0 +1,44 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+#include "./StringCopier.hpp"
+#include "./StringMover.hpp"
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <typename TJsonBuffer, typename TInput, typename Enable = void>
+struct StringStorage {
+  typedef StringCopier<TJsonBuffer> type;
+
+  static type create(TJsonBuffer& jb, TInput&) {
+    return type(jb);
+  }
+};
+
+template <typename TJsonBuffer, typename TChar>
+struct StringStorage<TJsonBuffer, TChar*,
+                     typename enable_if<!is_const<TChar>::value>::type> {
+  typedef StringMover<TChar> type;
+
+  static type create(TJsonBuffer&, TChar* input) {
+    return type(input);
+  }
+};
+
+template <typename TJsonBuffer, typename TInput>
+typename StringStorage<TJsonBuffer, TInput>::type makeStringStorage(
+    TJsonBuffer& jb, TInput& input) {
+  return StringStorage<TJsonBuffer, TInput>::create(jb, input);
+}
+
+template <typename TJsonBuffer, typename TChar>
+typename StringStorage<TJsonBuffer, TChar*>::type makeStringStorage(
+    TJsonBuffer& jb, TChar* input) {
+  return StringStorage<TJsonBuffer, TChar*>::create(jb, input);
+}
+}  // namespace Internals
+}  // namespace ArduinoJson

src/ArduinoJson/Writing/Writer.hpp

@@ -1,44 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "./JsonBufferWriter.hpp"
-#include "./StringWriter.hpp"
-
-namespace ArduinoJson {
-namespace Internals {
-
-template <typename TJsonBuffer, typename TInput, typename Enable = void>
-struct Writer {
-  typedef JsonBufferWriter<TJsonBuffer> type;
-
-  static type create(TJsonBuffer& jb, TInput&) {
-    return type(jb);
-  }
-};
-
-template <typename TJsonBuffer, typename TChar>
-struct Writer<TJsonBuffer, TChar*,
-              typename enable_if<!is_const<TChar>::value>::type> {
-  typedef StringWriter<TChar> type;
-
-  static type create(TJsonBuffer&, TChar* input) {
-    return type(input);
-  }
-};
-
-template <typename TJsonBuffer, typename TInput>
-typename Writer<TJsonBuffer, TInput>::type makeWriter(TJsonBuffer& jb,
-                                                      TInput& input) {
-  return Writer<TJsonBuffer, TInput>::create(jb, input);
-}
-
-template <typename TJsonBuffer, typename TChar>
-typename Writer<TJsonBuffer, TChar*>::type makeWriter(TJsonBuffer& jb,
-                                                      TChar* input) {
-  return Writer<TJsonBuffer, TChar*>::create(jb, input);
-}
-}  // namespace Internals
-}  // namespace ArduinoJson

src/ArduinoJson/deserializeJson.hpp

@@ -1,58 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "Json/JsonDeserializer.hpp"
-#include "Reading/Reader.hpp"
-#include "Writing/Writer.hpp"
-
-namespace ArduinoJson {
-// DeserializationError deserializeJson(TDocument& doc, TString input);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TString = const std::string&, const String&
-template <typename TDocument, typename TString>
-typename Internals::enable_if<!Internals::is_array<TString>::value,
-                              DeserializationError>::type
-deserializeJson(TDocument &doc, const TString &input) {
-  using namespace Internals;
-  return makeJsonDeserializer(&doc.buffer(), makeReader(input),
-                              makeWriter(doc.buffer(), input), doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-//
-// DeserializationError deserializeJson(TDocument& doc, TChar* input);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TChar* = char*, const char*, const FlashStringHelper*
-template <typename TDocument, typename TChar>
-DeserializationError deserializeJson(TDocument &doc, TChar *input) {
-  using namespace Internals;
-  return makeJsonDeserializer(&doc.buffer(), makeReader(input),
-                              makeWriter(doc.buffer(), input), doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-//
-// DeserializationError deserializeJson(TDocument& doc, TChar* input, size_t
-// inputSize); TDocument = DynamicJsonDocument, StaticJsonDocument TChar* =
-// char*, const char*, const FlashStringHelper*
-template <typename TDocument, typename TChar>
-DeserializationError deserializeJson(TDocument &doc, TChar *input,
-                                     size_t inputSize) {
-  using namespace Internals;
-  return makeJsonDeserializer(&doc.buffer(), makeReader(input, inputSize),
-                              makeWriter(doc.buffer(), input), doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-//
-// DeserializationError deserializeJson(TDocument& doc, TStream input);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TStream = std::istream&, Stream&
-template <typename TDocument, typename TStream>
-DeserializationError deserializeJson(TDocument &doc, TStream &input) {
-  using namespace Internals;
-  return makeJsonDeserializer(&doc.buffer(), makeReader(input),
-                              makeWriter(doc.buffer(), input), doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-}  // namespace ArduinoJson

src/ArduinoJson/deserializeMsgPack.hpp

@@ -1,63 +0,0 @@
-// ArduinoJson - arduinojson.org
-// Copyright Benoit Blanchon 2014-2018
-// MIT License
-
-#pragma once
-
-#include "MsgPack/MsgPackDeserializer.hpp"
-#include "Reading/Reader.hpp"
-#include "Writing/Writer.hpp"
-
-namespace ArduinoJson {
-// DeserializationError deserializeMsgPack(TDocument& doc, TString input);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TString = const std::string&, const String&
-template <typename TDocument, typename TString>
-typename Internals::enable_if<!Internals::is_array<TString>::value,
-                              DeserializationError>::type
-deserializeMsgPack(TDocument &doc, const TString &input) {
-  using namespace Internals;
-  return makeMsgPackDeserializer(&doc.buffer(), makeReader(input),
-                                 makeWriter(doc.buffer(), input),
-                                 doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-//
-// DeserializationError deserializeMsgPack(TDocument& doc, TChar* input);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TChar* = char*, const char*, const FlashStringHelper*
-template <typename TDocument, typename TChar>
-DeserializationError deserializeMsgPack(TDocument &doc, TChar *input) {
-  using namespace Internals;
-  return makeMsgPackDeserializer(&doc.buffer(), makeReader(input),
-                                 makeWriter(doc.buffer(), input),
-                                 doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-//
-// DeserializationError deserializeMsgPack(TDocument& doc, TChar* input, size_t
-// inputSize);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TChar* = char*, const char*, const FlashStringHelper*
-template <typename TDocument, typename TChar>
-DeserializationError deserializeMsgPack(TDocument &doc, TChar *input,
-                                        size_t inputSize) {
-  using namespace Internals;
-  return makeMsgPackDeserializer(&doc.buffer(), makeReader(input, inputSize),
-                                 makeWriter(doc.buffer(), input),
-                                 doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-//
-// DeserializationError deserializeMsgPack(TDocument& doc, TStream input);
-// TDocument = DynamicJsonDocument, StaticJsonDocument
-// TStream = std::istream&, Stream&
-template <typename TDocument, typename TStream>
-DeserializationError deserializeMsgPack(TDocument &doc, TStream &input) {
-  using namespace Internals;
-  return makeMsgPackDeserializer(&doc.buffer(), makeReader(input),
-                                 makeWriter(doc.buffer(), input),
-                                 doc.nestingLimit)
-      .parse(doc.template to<JsonVariant>());
-}
-}  // namespace ArduinoJson

test/CMakeLists.txt

@@ -73,6 +73,7 @@ add_subdirectory(JsonSerializer)
 add_subdirectory(JsonVariant)
 add_subdirectory(JsonWriter)
 add_subdirectory(Misc)
-add_subdirectory(MsgPack)
+add_subdirectory(MsgPackDeserializer)
+add_subdirectory(MsgPackSerializer)
 add_subdirectory(Polyfills)
 add_subdirectory(StaticJsonBuffer)

test/JsonDeserializer/DeserializationError.cpp

@@ -38,7 +38,13 @@ TEST_CASE("DeserializationError") {
     TEST_BOOLIFICATION(NotSupported, true);
   }
 
-  SECTION("ostream") {
+  SECTION("ostream code") {
+    std::stringstream s;
+    s << DeserializationError(DeserializationError::InvalidInput);
+    REQUIRE(s.str() == "InvalidInput");
+  }
+
+  SECTION("ostream code") {
     std::stringstream s;
     s << DeserializationError::InvalidInput;
     REQUIRE(s.str() == "InvalidInput");

test/JsonSerializer/std_string.cpp

@@ -15,14 +15,14 @@ TEST_CASE("serialize JsonArray to std::string") {
     std::string json;
     serializeJson(array, json);
 
-    REQUIRE(std::string("[4,2]") == json);
+    REQUIRE("[4,2]" == json);
   }
 
   SECTION("serializeJsonPretty") {
     std::string json;
     serializeJsonPretty(array, json);
 
-    REQUIRE(std::string("[\r\n  4,\r\n  2\r\n]") == json);
+    REQUIRE("[\r\n  4,\r\n  2\r\n]" == json);
   }
 }
 
@@ -35,13 +35,13 @@ TEST_CASE("serialize JsonObject to std::string") {
     std::string json;
     serializeJson(doc, json);
 
-    REQUIRE(std::string("{\"key\":\"value\"}") == json);
+    REQUIRE("{\"key\":\"value\"}" == json);
   }
 
   SECTION("serializeJsonPretty") {
     std::string json;
     serializeJsonPretty(doc, json);
 
-    REQUIRE(std::string("{\r\n  \"key\": \"value\"\r\n}") == json);
+    REQUIRE("{\r\n  \"key\": \"value\"\r\n}" == json);
   }
 }

test/JsonWriter/writeFloat.cpp

@@ -7,7 +7,7 @@
 #include <string>
 
 #include <ArduinoJson/Json/JsonWriter.hpp>
-#include <ArduinoJson/Print/DynamicStringBuilder.hpp>
+#include <ArduinoJson/Serialization/DynamicStringBuilder.hpp>
 
 using namespace ArduinoJson::Internals;
 

test/JsonWriter/writeString.cpp

@@ -5,7 +5,7 @@
 #include <catch.hpp>
 
 #include <ArduinoJson/Json/JsonWriter.hpp>
-#include <ArduinoJson/Print/StaticStringBuilder.hpp>
+#include <ArduinoJson/Serialization/StaticStringBuilder.hpp>
 
 using namespace ArduinoJson::Internals;
 

test/MsgPackDeserializer/CMakeLists.txt

@@ -2,7 +2,7 @@
 # Copyright Benoit Blanchon 2014-2018
 # MIT License
 
-add_executable(MsgPackTests
+add_executable(MsgPackDeserializerTests
 	deserializeArray.cpp
 	deserializeObject.cpp
 	deserializeStaticVariant.cpp
@@ -15,5 +15,5 @@ add_executable(MsgPackTests
 	std_istream.cpp
 )
 
-target_link_libraries(MsgPackTests catch)
-add_test(MsgPack MsgPackTests)
+target_link_libraries(MsgPackDeserializerTests catch)
+add_test(MsgPackDeserializer MsgPackDeserializerTests)

test/MsgPackDeserializer/deserializeArray.cpp

@@ -5,7 +5,7 @@
 #include <ArduinoJson.h>
 #include <catch.hpp>
 
-TEST_CASE("deserializeMsgPack(JsonArray&)") {
+TEST_CASE("deserialize MsgPack array") {
   DynamicJsonDocument doc;
 
   SECTION("fixarray") {

test/MsgPackDeserializer/deserializeVariant.cpp

@@ -16,7 +16,7 @@ static void check(const char* input, U expected) {
   REQUIRE(variant.as<T>() == expected);
 }
 
-TEST_CASE("deserializeMsgPack(JsonVariant&)") {
+TEST_CASE("deserialize MsgPack value") {
   SECTION("nil") {
     const char* nil = 0;  // ArduinoJson uses a string for null
     check<const char*>("\xc0", nil);

test/MsgPackSerializer/CMakeLists.txt

@@ -0,0 +1,14 @@
+# ArduinoJson - arduinojson.org
+# Copyright Benoit Blanchon 2014-2018
+# MIT License
+
+add_executable(MsgPackSerializerTests
+	destination_types.cpp
+	measure.cpp
+	serializeArray.cpp
+	serializeObject.cpp
+	serializeVariant.cpp
+)
+
+target_link_libraries(MsgPackSerializerTests catch)
+add_test(MsgPackSerializer MsgPackSerializerTests)

test/MsgPackSerializer/destination_types.cpp

@@ -0,0 +1,47 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("serialize MsgPack to various destination types") {
+  DynamicJsonDocument doc;
+  JsonObject &object = doc.to<JsonObject>();
+  object["hello"] = "world";
+  const char *expected_result = "\x81\xA5hello\xA5world";
+  const size_t expected_length = 13;
+
+  SECTION("std::string") {
+    std::string result;
+    size_t len = serializeMsgPack(object, result);
+
+    REQUIRE(expected_result == result);
+    REQUIRE(expected_length == len);
+  }
+
+  /*  SECTION("std::vector<char>") {
+      std::vector<char> result;
+      size_t len = serializeMsgPack(object, result);
+
+      REQUIRE(std::vector<char>(expected_result, expected_result + 13) ==
+    result);
+    REQUIRE(expected_length == len);
+    } */
+
+  SECTION("char[]") {
+    char result[64];
+    size_t len = serializeMsgPack(object, result);
+
+    REQUIRE(std::string(expected_result) == result);
+    REQUIRE(expected_length == len);
+  }
+
+  SECTION("char*") {
+    char result[64];
+    size_t len = serializeMsgPack(object, result, 64);
+
+    REQUIRE(std::string(expected_result) == result);
+    REQUIRE(expected_length == len);
+  }
+}

test/MsgPackSerializer/measure.cpp

@@ -0,0 +1,14 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("measureMsgPack()") {
+  DynamicJsonDocument doc;
+  JsonObject &object = doc.to<JsonObject>();
+  object["hello"] = "world";
+
+  REQUIRE(measureMsgPack(doc) == 13);
+}

test/MsgPackSerializer/serializeArray.cpp

@@ -0,0 +1,60 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+static void check(const JsonArray& array, const char* expected_data,
+                  size_t expected_len) {
+  std::string expected(expected_data, expected_data + expected_len);
+  std::string actual;
+  size_t len = serializeMsgPack(array, actual);
+  CAPTURE(array);
+  REQUIRE(len == expected_len);
+  REQUIRE(actual == expected);
+}
+
+template <size_t N>
+static void check(const JsonArray& array, const char (&expected_data)[N]) {
+  const size_t expected_len = N - 1;
+  check(array, expected_data, expected_len);
+}
+
+// TODO: this function is used by the commented test
+// static void check(const JsonArray& array, const std::string& expected) {
+//   check(array, expected.data(), expected.length());
+// }
+
+TEST_CASE("serialize MsgPack array") {
+  DynamicJsonDocument doc;
+  JsonArray& array = doc.to<JsonArray>();
+
+  SECTION("empty") {
+    check(array, "\x90");
+  }
+
+  SECTION("fixarray") {
+    array.add("hello");
+    array.add("world");
+
+    check(array, "\x92\xA5hello\xA5world");
+  }
+
+  SECTION("array 16") {
+    for (int i = 0; i < 16; i++) array.add(i);
+
+    check(array,
+          "\xDC\x00\x10\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D"
+          "\x0E\x0F");
+  }
+
+  // TODO: this test is too slow
+  // SECTION("array 32") {
+  //   const char* nil = 0;
+  //   for (int i = 0; i < 65536; i++) array.add(nil);
+  //
+  //   check(array,
+  //         std::string("\xDD\x00\x01\x00\x00", 5) + std::string(65536, 0xC0));
+  // }
+}

test/MsgPackSerializer/serializeObject.cpp

@@ -0,0 +1,73 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <stdio.h>
+#include <catch.hpp>
+
+static void check(const JsonObject& object, const char* expected_data,
+                  size_t expected_len) {
+  std::string expected(expected_data, expected_data + expected_len);
+  std::string actual;
+  size_t len = serializeMsgPack(object, actual);
+  CAPTURE(object);
+  REQUIRE(len == expected_len);
+  REQUIRE(actual == expected);
+}
+
+template <size_t N>
+static void check(const JsonObject& object, const char (&expected_data)[N]) {
+  const size_t expected_len = N - 1;
+  check(object, expected_data, expected_len);
+}
+
+// TODO: used by the commented test
+// static void check(const JsonObject& object, const std::string& expected) {
+//  check(object, expected.data(), expected.length());
+//}
+
+TEST_CASE("serialize MsgPack object") {
+  DynamicJsonDocument doc;
+  JsonObject& object = doc.to<JsonObject>();
+
+  SECTION("empty") {
+    check(object, "\x80");
+  }
+
+  SECTION("fixmap") {
+    object["hello"] = "world";
+
+    check(object, "\x81\xA5hello\xA5world");
+  }
+
+  SECTION("map 16") {
+    for (int i = 0; i < 16; ++i) {
+      char key[16];
+      sprintf(key, "i%X", i);
+      object[key] = i;
+    }
+
+    check(object,
+          "\xDE\x00\x10\xA2i0\x00\xA2i1\x01\xA2i2\x02\xA2i3\x03\xA2i4\x04\xA2i5"
+          "\x05\xA2i6\x06\xA2i7\x07\xA2i8\x08\xA2i9\x09\xA2iA\x0A\xA2iB\x0B\xA2"
+          "iC\x0C\xA2iD\x0D\xA2iE\x0E\xA2iF\x0F");
+  }
+
+  // TODO: improve performance and uncomment
+  // SECTION("map 32") {
+  //   std::string expected("\xDF\x00\x01\x00\x00", 5);
+  //
+  //   for (int i = 0; i < 65536; ++i) {
+  //     char kv[16];
+  //     sprintf(kv, "%04x", i);
+  //     object[kv] = kv;
+  //     expected += '\xA4';
+  //     expected += kv;
+  //     expected += '\xA4';
+  //     expected += kv;
+  //   }
+  //
+  //   check(object, expected);
+  // }
+}

test/MsgPackSerializer/serializeVariant.cpp

@@ -0,0 +1,129 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+void check(JsonVariant variant, const char* expected_data,
+           size_t expected_len) {
+  std::string expected(expected_data, expected_data + expected_len);
+  std::string actual;
+  size_t len = serializeMsgPack(variant, actual);
+  CAPTURE(variant);
+  REQUIRE(len == expected_len);
+  REQUIRE(actual == expected);
+}
+
+template <size_t N>
+void check(JsonVariant variant, const char (&expected_data)[N]) {
+  const size_t expected_len = N - 1;
+  check(variant, expected_data, expected_len);
+}
+
+void check(JsonVariant variant, const std::string& expected) {
+  check(variant, expected.data(), expected.length());
+}
+
+TEST_CASE("serialize MsgPack value") {
+  SECTION("undefined") {
+    check(JsonVariant(), "\xC0");  // we represent undefined as nil
+  }
+
+  SECTION("nil") {
+    const char* nil = 0;  // ArduinoJson uses a string for null
+    check(nil, "\xC0");
+  }
+
+  SECTION("bool") {
+    check(false, "\xC2");
+    check(true, "\xC3");
+  }
+
+  SECTION("positive fixint") {
+    check(0, "\x00");
+    check(127, "\x7F");
+  }
+
+  SECTION("uint 8") {
+    check(128, "\xCC\x80");
+    check(255, "\xCC\xFF");
+  }
+
+  SECTION("uint 16") {
+    check(256, "\xCD\x01\x00");
+    check(0xFFFF, "\xCD\xFF\xFF");
+  }
+
+  SECTION("uint 32") {
+    check(0x00010000U, "\xCE\x00\x01\x00\x00");
+    check(0x12345678U, "\xCE\x12\x34\x56\x78");
+    check(0xFFFFFFFFU, "\xCE\xFF\xFF\xFF\xFF");
+  }
+
+#if ARDUINOJSON_USE_LONG_LONG || ARDUINOJSON_USE_INT64
+  SECTION("uint 64") {
+    check(0x0001000000000000U, "\xCF\x00\x01\x00\x00\x00\x00\x00\x00");
+    check(0x123456789ABCDEF0U, "\xCF\x12\x34\x56\x78\x9A\xBC\xDE\xF0");
+    check(0xFFFFFFFFFFFFFFFFU, "\xCF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF");
+  }
+#endif
+
+  SECTION("negative fixint") {
+    check(-1, "\xFF");
+    check(-32, "\xE0");
+  }
+
+  SECTION("int 8") {
+    check(-33, "\xD0\xDF");
+    check(-128, "\xD0\x80");
+  }
+
+  SECTION("int 16") {
+    check(-129, "\xD1\xFF\x7F");
+    check(-32768, "\xD1\x80\x00");
+  }
+
+  SECTION("int 32") {
+    check(-32769, "\xD2\xFF\xFF\x7F\xFF");
+    check(-2147483647 - 1, "\xD2\x80\x00\x00\x00");
+  }
+
+#if ARDUINOJSON_USE_LONG_LONG || ARDUINOJSON_USE_INT64
+  SECTION("int 64") {
+    check(int64_t(0xFEDCBA9876543210), "\xD3\xFE\xDC\xBA\x98\x76\x54\x32\x10");
+  }
+#endif
+
+  SECTION("float 32") {
+    check(1.25, "\xCA\x3F\xA0\x00\x00");
+  }
+
+  SECTION("float 64") {
+    check(3.1415, "\xCB\x40\x09\x21\xCA\xC0\x83\x12\x6F");
+  }
+
+  SECTION("fixstr") {
+    check("", "\xA0");
+    check("hello world hello world hello !",
+          "\xBFhello world hello world hello !");
+  }
+
+  SECTION("str 8") {
+    check("hello world hello world hello !!",
+          "\xD9\x20hello world hello world hello !!");
+  }
+
+  SECTION("str 16") {
+    std::string shortest(256, '?');
+    check(shortest.c_str(), std::string("\xDA\x01\x00", 3) + shortest);
+
+    std::string longest(65535, '?');
+    check(longest.c_str(), std::string("\xDA\xFF\xFF", 3) + longest);
+  }
+
+  SECTION("str 32") {
+    std::string shortest(65536, '?');
+    check(shortest.c_str(), std::string("\xDB\x00\x01\x00\x00", 5) + shortest);
+  }
+}