diff --git a/src/include/strings.cpp b/src/include/strings.cpp
index bb5e5cf69..9a2226538 100755
--- a/src/include/strings.cpp
+++ b/src/include/strings.cpp
@@ -144,6 +144,16 @@ char TString::shift(int n)
   return r;
 }
 
+bool TString::is_zero() const
+{
+	bool is_zero = true;
+	const int strlen = len();
+
+	for (int i = 0; is_zero && i < strlen; i++)
+		is_zero = _str[i] == '0';
+	return is_zero;
+}
+
 TString& TString::operator <<(const char* s)
 {
   if (s && *s)
diff --git a/src/include/strings.h b/src/include/strings.h
index 58172f6b3..bd5f79629 100755
--- a/src/include/strings.h
+++ b/src/include/strings.h
@@ -214,6 +214,7 @@ public:
   // @cmember Fa scorrere a destra la stringa e restituisce l'ultimo carattere scartato
   char rshift(int n=1)
     {return shift(-n);}
+	bool is_zero() const;
   // @cmember Concatena una stringa all'oggetto stringa
   TString& operator <<(const char*);
   // @cmember Concatena un carattere all'oggetto stringa