+//-----------------------------------------------------------------------------
+int str2x(const std::string & str, int32_t & x);
+int str2x(const std::string & str, uint32_t & x);
+#ifndef WIN32
+int str2x(const std::string & str, int64_t & x);
+int str2x(const std::string & str, uint64_t & x);
+#endif
+//-----------------------------------------------------------------------------
+const std::string & x2str(uint32_t x, std::string & s);
+const std::string & x2str(uint64_t x, std::string & s);
+//-----------------------------------------------------------------------------
+const std::string & x2str(double x, std::string & s);
+//-----------------------------------------------------------------------------
+