[Lzip-bug] [Success] Starting decompression in the middle of the stream

[Jacob Rief]

Hello Antonio,
thanks to the two functions LZ_decompress_sync_to_member and
LZ_decompress_reset, now I am able to start a decompression at any
position of the stream. Of course, valid data can be obtained only
after the decoder has been resynced on the next member.

This is the algorithm I used successfully:
Assumption 1) The decoder was already initialized.
Assumption 2) The file descriptor points onto any position, the stream
effectively contains rubbish.

1) LZ_decompress_reset
2) LZ_decompress_sync_to_member
3) LZ_decompress_write
4) go back to step 3 until LZ_decompress_read returns > 0
now continue with decompression as usual.

You can reposition the stream exactly onto a member boundary, then the
current member still can be decompressed.

Thanks and Regards,
Jacob