Method UTF16ToUTF8

ext/src/cppformat/format.cc:441–446

}

fmt::internal::UTF16ToUTF8::UTF16ToUTF8(fmt::WStringRef s) {
  if (int error_code = convert(s)) {
    FMT_THROW(WindowsError(error_code,
        "cannot convert string from UTF-16 to UTF-8"));
  }
}

int fmt::internal::UTF16ToUTF8::convert(fmt::WStringRef s) {
  int length = WideCharToMultiByte(CP_UTF8, 0, s.c_str(), -1, 0, 0, 0, 0);