Fixed assignment of double to MString.

MString.cpp

@@ -2,6 +2,7 @@
 #include "Log.h"
 #include "uuid/uuid.h"
 #include <cstring>
+#include <string>
 #include <iomanip>
 #include <stdlib.h>
 
@@ -80,6 +81,13 @@ namespace coreutils {
       this->length = fread(this->data, 1000000, 1000000, file);
       cursor = this->data;
    }
+
+   MString::MString(double value) {
+      std::string data = std::to_string(value);
+      setSize(data.length());
+      memcpy(this->data, (char *)data.c_str(), data.length());
+      cursor = this->data;      
+   }
    
    MString::~MString() {
       if (data)
@@ -120,6 +128,14 @@ namespace coreutils {
       *data = value;
       return *this;
    }
+
+   MString &MString::operator=(double value) {
+      std::string data = std::to_string(value);
+      setSize(data.length());
+      memcpy(this->data, (char *)data.c_str(), data.length());
+      cursor = this->data;
+      return *this;
+   }
    
    MString &MString::operator<<(const char *value) {
       int temp = length;