Alternate DUMP format question

I'm playing with an alternate DUMP format and would like to be able to
quickly determine if a file is "binary" or "text" so I can tell "svnadmin
dump" to encode the binary file on output. I noticed that currently "svnadmin
dump" just dumps the 8-bit output without checking.

What method or procedure could I use to effeciently determine what the
data type is before I dump it out?

   Thanks!

-- 
David Wayne Summers          "Linux: Because reboots are for hardware upgrades!"
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