Adrien Grand created LUCENE-5759:
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Summary: Add PackedInts.unsignedBitsRequired
Key: LUCENE-5759
URL: https://issues.apache.org/jira/browse/LUCENE-5759
Project: Lucene - Core
Issue Type: Bug
Reporter: Adrien Grand
Assignee: Adrien Grand
Priority: Minor
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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