+#define CS_GEORGIAN_PS "GEORGIAN-PS"
+#define CS_TCVN5712_1 "TCVN5712-1"
+
+void conv_jistoeuc (gchar *outbuf, gint outlen, const gchar *inbuf);
+void conv_euctojis (gchar *outbuf, gint outlen, const gchar *inbuf);
+void conv_sjistoeuc (gchar *outbuf, gint outlen, const gchar *inbuf);
+void conv_anytoeuc (gchar *outbuf, gint outlen, const gchar *inbuf);
+void conv_anytoutf8 (gchar *outbuf, gint outlen, const gchar *inbuf);
+void conv_anytojis (gchar *outbuf, gint outlen, const gchar *inbuf);
+
+void conv_unreadable_eucjp (gchar *str);
+void conv_unreadable_8bit (gchar *str);
+void conv_unreadable_latin (gchar *str);
+void conv_unreadable_locale (gchar *str);