class ConfirmingSyncPatternState < StatePattern::State
  # Assumes that bytes[0] == Synchronizer::SYNC_PATTERN[0]
  def handle_byte_stream(bytes)
   idx = 0;
   sync_length = Synchronizer::SYNC_PATTERN.length
   
   # confirm rest of sync pattern 
   while (idx < bytes.length && idx < sync_length && bytes[idx] == Synchronizer::SYNC_PATTERN[idx]) do idx = idx+1 end
   
   if (idx == sync_length)
     #p "Sync pattern confirmed"
     transition_to(InSyncState)
   else  
     #p "Back to SearchingForSync state. idx = #{idx}."
     transition_to(SearchingForSyncState)
   end
  
  # return the rest
  return bytes[idx+1..-1]
  end
end