+using namespace std;
+
+typedef size_t ssize;
+#define NPOS string::npos
+
+string to_string (string s);
+string to_string (char c, int n=1);
+string to_string (int i, char const *format=0);
+string to_string (double f, char const *format=0);
+string to_string (long);
+string to_string (long unsigned);
+string to_string (I64, char const *format=0);
+string to_string (unsigned);
+string to_string (bool b);
+string to_string (char const *format, ...)
+ __attribute__ ((format (printf, 1, 2)));
+
+string &replace_all (string* str, string const &find, string const &replace);
+string &replace_all (string* str, char find, char replace);
+char *string_copy (string s);