[Core] Add switch_safe_atol() and switch_safe_atoll() functions. Add a unit-test.

src/include/switch_utils.h

@@ -831,10 +831,10 @@ static inline char *switch_clean_name_string(char *s)
 
 
 /*!
-  \brief Turn a string into a number (default if NULL)
+  \brief Turn a string into an integer (default if NULL)
   \param nptr the string
   \param dft the default
-  \return the number version of the string or the default
+  \return the integer version of the string or the default
 */
 static inline int switch_safe_atoi(const char *nptr, int dft)
 {
@@ -842,6 +842,30 @@ static inline int switch_safe_atoi(const char *nptr, int dft)
 }
 
 
+/*!
+  \brief Turn a string into a long integer (default if NULL)
+  \param nptr the string
+  \param dft the default
+  \return the long integer version of the string or the default
+*/
+static inline long int switch_safe_atol(const char *nptr, long int dft)
+{
+	return nptr ? atol(nptr) : dft;
+}
+
+
+/*!
+  \brief Turn a string into a long long integer (default if NULL)
+  \param nptr the string
+  \param dft the default
+  \return the long long integer version of the string or the default
+*/
+static inline long long int switch_safe_atoll(const char *nptr, long long int dft)
+{
+	return nptr ? atoll(nptr) : dft;
+}
+
+
 /*!
   \brief Free a pointer and set it to NULL unless it already is NULL
   \param it the pointer