/// convert \p s from ucs4 to the encoding of the file system.
std::string const to_filesystem8bit(docstring const & s);
+/// convert \p s from ucs4 to the \p encoding.
+std::string const to_iconv_encoding(docstring const & s,
+ std::string const & encoding);
+
+/// convert \p s from \p encoding to ucs4.
+docstring const from_iconv_encoding(std::string const & s,
+ std::string const & encoding);
+
/// normalize \p s to precomposed form c
docstring const normalize_c(docstring const & s);