module ActiveSupport::Cache::MemoryStore::DupCoder

def dump(entry)
  if entry.value && entry.value != true && !entry.value.is_a?(Numeric)
    Cache::Entry.new(dump_value(entry.value), expires_at: entry.expires_at, version: entry.version)
  else
    entry
  end
end

def dump_compressed(entry, threshold)
  compressed_entry = entry.compressed(threshold)
  compressed_entry.compressed? ? compressed_entry : dump(entry)
end

def dump_value(value)
  if value.is_a?(String) && !value.start_with?(MARSHAL_SIGNATURE)
    value.dup
  else
    Marshal.dump(value)
  end
end

def load(entry)
  if !entry.compressed? && entry.value.is_a?(String)
    Cache::Entry.new(load_value(entry.value), expires_at: entry.expires_at, version: entry.version)
  else
    entry
  end
end

def load_value(string)
  if string.start_with?(MARSHAL_SIGNATURE)
    Marshal.load(string)
  else
    string.dup
  end
end