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

src/ArduinoJson/StringStorage/StringMover.hpp

@@ -0,0 +1,41 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#pragma once
+
+namespace ArduinoJson {
+namespace Internals {
+
+template <typename TChar>
+class StringMover {
+ public:
+  class String {
+   public:
+    String(TChar** ptr) : _writePtr(ptr), _startPtr(*ptr) {}
+
+    void append(char c) {
+      *(*_writePtr)++ = TChar(c);
+    }
+
+    const char* c_str() const {
+      *(*_writePtr)++ = 0;
+      return reinterpret_cast<const char*>(_startPtr);
+    }
+
+   private:
+    TChar** _writePtr;
+    TChar* _startPtr;
+  };
+
+  StringMover(TChar* buffer) : _ptr(buffer) {}
+
+  String startString() {
+    return String(&_ptr);
+  }
+
+ private:
+  TChar* _ptr;
+};
+}  // namespace Internals
+}  // namespace ArduinoJson