#include <boost/locale.hpp>

using namespace std;

/* Return 0 on success, -1 on error */
extern "C" int utf8_boost(const unsigned char* data, int len) {
  try {
    boost::locale::conv::utf_to_utf<char>(data, data + len,
                                          boost::locale::conv::stop);
  } catch (const boost::locale::conv::conversion_error& ex) {
    return -1;
  }

  return 0;
}