utf32_to_utf8
utflen = utf32_to_utf8(uni, &result[o], 3);
EXPORT_SYMBOL(utf32_to_utf8);
size = utf32_to_utf8(u, op, maxout);
n = utf32_to_utf8(uni, out, boundlen);
len = utf32_to_utf8(c, &str_o[*str_o_idx],
nb = utf32_to_utf8(uni, out, out_len);
extern int utf32_to_utf8(unicode_t u, u8 *s, int maxlen);