next state settings for nyaruko19.c
              KEY_HEADER  KEY        KEY_FOOTER     DECODER_HEADER  ENCODED_DATA  DATA_PADDING   PADDING_REMAINDER  EPILOGUE
copy_from     write_to    KeyFooter  DecoderHeader  s               s             DecoderFooter  Epilogue
write_to      KeyHeader   KeyHeader  KeyHeader      write_to        write_to      write_to       KeyHeader
cursor        0           0          0              0               cursor        0              0
flush_buffer  1           1          1              1               flush_buffer  flush_buffer   1