+char *recode_string (const char *to, const char *from,
+ const char *text, int len);
+char *recode_string_pool (const char *to, const char *from,
+ const char *text, int length, struct pool *);
+struct substring recode_substring_pool (const char *to, const char *from,
+ struct substring text, struct pool *);
+
+bool valid_encoding (const char *enc);
+
+char get_system_decimal (void);
+
+const char * get_default_encoding (void);
+void set_default_encoding (const char *enc);
+
+bool set_encoding_from_locale (const char *loc);