encoding problem fixed

[David Brownell]

Elliotte Rusty Harold wrote:
> 
> It's possible to start with an InputStream to read the XML declaration,
> then chain that InputStream to an InputStreamReader once the encoding is
> known and never use the InputStream directly again. Since the XML
> declaration is ASCII (possibvly aside from a byte order mark) this isn't
> all that difficult to implement.

Make that a a "PushbackInputStream" ... remember that XML (and text)
declarations are optional, and if you're not tying to the parser's
prolog logic, you'll need to feed it a stream of characters.

Consider a document starting "<tag>" where instead of "t" you've got
a multibyte UTF-8 encoded name.  Without some pushback there, you're
likely in severe trouble unless you handle the UTF-8 directly ... that
"ASCII only" assumption can fail _very_ quickly.

- Dave

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