Function UTF8ToWideStringInternal

cpp/src/arrow/util/utf8.cc:129–137

// so call into a vendored utf8 implementation instead.

std::wstring UTF8ToWideStringInternal(std::string_view source) {
  std::wstring ws;
#if WCHAR_MAX > 0xFFFF
  ::utf8::utf8to32(source.begin(), source.end(), std::back_inserter(ws));
#else
  ::utf8::utf8to16(source.begin(), source.end(), std::back_inserter(ws));
#endif
  return ws;
}

std::string WideStringToUTF8Internal(const std::wstring& source) {
  std::string s;