Refactored to use StringBuilder

srcs/StringBuilder.h

@@ -0,0 +1,31 @@
+/*
+ * Arduino JSON library
+ * Benoit Blanchon 2014 - MIT License
+ */
+
+#pragma once
+
+#include "Print.h"
+
+namespace ArduinoJson
+{
+    namespace Internals
+    {
+        class StringBuilder : public Print
+        {
+        public:
+            StringBuilder(char* buf, int size)
+                : buffer(buf), capacity(size - 1), length(0)
+            {
+                buffer[0] = 0;
+            }
+
+            virtual size_t write(uint8_t c);
+
+        private:
+            char* buffer;
+            int capacity;
+            int length;
+        };
+    }
+}