+ ensure_iconv_initialized();
+
+ wchar_t *from_buf = wcsdup(c_str());
+ size_t out_max_size = size() * 6;
+ char *to_buf = new char[out_max_size];
+
+ char *inptr = reinterpret_cast<char *>(from_buf), *outptr = to_buf;
+
+ size_t in_left = size() * sizeof(wchar_t);
+ size_t out_left = out_max_size;
+
+ size_t ret = iconv(ucs4_reverse_iconv, NULL, NULL, &outptr, &out_left);
+ if (ret == (size_t)(-1)) {
+ throw std::runtime_error("Error in iconv during initialization");
+ }
+
+ ret = iconv(ucs4_reverse_iconv, &inptr, &in_left, &outptr, &out_left);
+ if (ret == (size_t)(-1)) {
+ perror("iconv");
+ throw std::runtime_error("Error in iconv during conversion");
+ }
+
+ std::string utf8(to_buf, outptr);