[cl-pdf-devel] deflate stream with sbcl

[Roland Lohner]

Dear List,

the attached patch fixes a bug which makes sbcl users unable to compress pdf
streams using non unicode encodings.

The problem is with the function call (sb-ext:string-to-octets string :start
start :end end) in salza-deflate::string-to-octets.
salza-deflate::string-to-octets in cl-pdf gets strings only which can be
encoded with single byte encoding. (earlier functions map exceptional
characters of the used encoding as if it was a single-byte encoding) So it
should use sb-ext:string-to-octets with arguments :external-format
:iso-8859-1 to avoid re-encoding with non-single-byte or "non-identity"
encoding. (defult external format is: utf-8)

This fix works with unicode and non-unicode encodings, as well.

Please take a look at the attached patch. Unless there are objections or
suggestions, Attila Lendvai will commit it eventually.

Regards,
Roland Lohner
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