Tommy Murphy 0ee98c69c1 LibCompress: Brotli support metadata of skip_length=0 ...

The relevant RFC section from
https://www.rfc-editor.org/rfc/rfc7932#section-9.2

MSKIPBYTES * 8 bits: MSKIPLEN - 1, where MSKIPLEN is
       the number of metadata bytes; this field is
       only present if MSKIPBYTES is positive;
       otherwise, MSKIPLEN is 0 (if MSKIPBYTES is
       greater than 1, and the last byte is all
       zeros, then the stream should be rejected as
       invalid)

So when skip_bytes is zero we need to break and
re-align bytes.

Added the relevant test case that demonstrates this from:
https://github.com/google/brotli/blob/master/tests/testdata/x.compressed

2022-10-11 22:49:33 -06:00

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