Function same_parent_dirs

zic.c:1719–1727

Return true if A and B must have the same parent dir if A and B exist. Return false if this is not necessarily true (though it might be true). Keep it simple, and do not inspect the file system. */

      result = xmalloc(dotdotetcsize);
    cp = result;
    for (i = 0; i < dotdots; i++)
      cp = mempcpy(cp, "../", 3);
    memmove(cp, f + dir_len, taillen + 1);
  }
  return result;
}

/* Return true if A and B must have the same parent dir if A and B exist.
   Return false if this is not necessarily true (though it might be true).
   Keep it simple, and do not inspect the file system.  */
ATTRIBUTE_PURE_114833
static bool