 Outputs
any epilogue bits or octets needed to produce a valid compressed data
stream for compressor. This generic function should not be called
directly, but may be specialized.
</blockquote>


<a name='sect-checksums'><h4>Checksums</h4></a>

<p>Checksums are used in several data formats to check data
  integrity. For example, PNG uses a CRC32 checksum for its chunks of
  data. Salza2 exports support for two common checksums.

<p><a name='adler32-checksum'><a name='crc32-checksum'>[Standard classes]</a></a