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https://issues.apache.org/jira/browse/LUCENE-2222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801874#action_12801874
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Renaud Delbru commented on LUCENE-2222:
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{quote}
I have not looked at the flex branch yet, but the PFOR implementation at
LUCENE-1410 has the possibility to encode/decode any block length. To decode
blocks that are not a multiple of 32 in size it will fall back from the faster
decoding routine (the generated code) to the general (and slow) decoding
routine at ForDecompress.decodeAnyFrame().
{quote}
Ok, I see. I deactivated this functionalities in my FrameOfReference
implementation. My mistake.
{quote}
Lately I've been tinkering with Simple9 (LUCENE-2189) which is simpler than
PFOR but has the problem that the input block size is not known beforehand. As
far as I can see now, we might end up with a general pair of block
encoding/decoding routines that uses PFOR for longer blocks, Simple9 (or a
variant of that) for the remainder and vByte for whatever is left.
{quote}
I have an implementation of Simple16 (which normally wastes less bits than
Simple 9). It is based on some code I found on the Web (a problem is that I
don't find anymore its origin. If I remember, it was from an academic project
in c) that I translated, fixed and optimised. I can share it if you're
interested.
> FixedIntBlockIndexInput.Reader does not initialise 'pending' int array
> ----------------------------------------------------------------------
>
> Key: LUCENE-2222
> URL: https://issues.apache.org/jira/browse/LUCENE-2222
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: Flex Branch
> Reporter: Renaud Delbru
> Priority: Minor
> Fix For: Flex Branch
>
> Attachments: LUCENE-2222.patch, LUCENE-2222.patch, LUCENE-2222.patch
>
>
> The FixedIntBlockIndexInput.Reader.pending int array is not initialised. As a
> consequence, the FixedIntBlockIndexInput.Reader#next() method returns always
> 0.
> A call to FixedIntBlockIndexInput.Reader#blockReader.readBlock() during the
> Reader initialisation may solve the issue (to be tested).
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