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https://issues.apache.org/jira/browse/LUCENE-5759?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand closed LUCENE-5759.
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Resolution: Fixed
Fix Version/s: 5.0
> Add PackedInts.unsignedBitsRequired
> -----------------------------------
>
> Key: LUCENE-5759
> URL: https://issues.apache.org/jira/browse/LUCENE-5759
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: 4.9, 5.0
>
> Attachments: LUCENE-5759.patch, LUCENE-5759.patch, LUCENE-5759.patch
>
>
> Across the code base, we have lots of:
> {code}
> long minValue, maxValue;
> final long delta = maxValue - minValue;
> final int bitsRequired = delta < 0 64 : Packedints.bitsRequired(delta);
> {code}
> {{Packedints.bitsRequired(delta)}} doesn't work directly in that case since
> it expects a positive value. And that is important that it does so in order
> to get an error instead of silently being super wasteful if a negative value
> is provided.
> Yet in some cases such as the one depicted above, the value should be
> interpreted as an unsigned long. So I propose to add another {{bitsRequired}}
> method that would interpret the value as unsigned.
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