+LIBPBD_API std::string short_version (std::string, std::string::size_type target_length);
+
+LIBPBD_API int atoi (const std::string&);
+LIBPBD_API int32_t atol (const std::string&);
+LIBPBD_API int64_t atoll (const std::string&);
+LIBPBD_API double atof (const std::string&);
+LIBPBD_API std::string url_decode (std::string const &);