+ bool identical_basenames =
+ (source_baselen == dest_baselen
+ && memcmp (source_basename, dest_basename, dest_baselen) == 0);
+ bool compare_dirs = identical_basenames;
+ bool same = false;
+
+#if ! _POSIX_NO_TRUNC && HAVE_PATHCONF && defined _PC_NAME_MAX
+ /* This implementation silently truncates components of file names. If
+ the base names might be truncated, check whether the truncated
+ base names are the same, while checking the directories. */
+ size_t slen_max = HAVE_LONG_FILE_NAMES ? 255 : _POSIX_NAME_MAX;
+ size_t min_baselen = MIN (source_baselen, dest_baselen);
+ if (slen_max <= min_baselen
+ && memcmp (source_basename, dest_basename, slen_max) == 0)
+ compare_dirs = true;
+#endif