This is an OS X Terminal command for the "Adler-32"
checksum of a file or files.  It works (data forks only)
starting in Panther OS X 10.3 and up to Tiger/Leopard (UB).
This one doesn't work in Snow Leopard or after.

The origin of this "Compress" folder is OS X 10.4.0 Tiger.
Copy the "Compress" folder (and -Recursively everything inside it)
to your OS X Panther, at :
/System/Library/Perl/5.8.1/darwin-thread-multi-2level/auto/

adler Syntax is identical to Terminal's crc32 command.

In fact, Panther doesn't come with the fast crc32 command and
could use it too, and, this "Compress" folder also allows for
fast crc32, so I've included crc32-for-Panther as bonus here.
Tiger and after already have standard the crc32 command.

Copy "adler" (and in Panther, "crc32" also) to one of your "bin"
folders, like "/usr/bin" or "/bin" or "/usr/sbin" or "/sbin".
