Function GetWindowsDirectoryPath

cpp/src/arrow/util/io_util.cc:1875–1882

#if _WIN32
NativePathString GetWindowsDirectoryPath() {
  auto size = GetWindowsDirectoryW(nullptr, 0);
  ARROW_CHECK_GT(size, 0) << "GetWindowsDirectoryW failed";
  std::vector<wchar_t> w_str(size);
  size = GetWindowsDirectoryW(w_str.data(), size);
  ARROW_CHECK_GT(size, 0) << "GetWindowsDirectoryW failed";
  return {w_str.data(), size};
}
#endif

// Return a list of preferred locations for temporary files