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The following commit(s) were added to refs/heads/master by this push:
new 4a540ed Add link to the ZeroInWord algorithm. (#7764)
4a540ed is described below
commit 4a540edbb1034f5994fef6cadff429a789527fc2
Author: Mayank Shrivastava <[email protected]>
AuthorDate: Fri Nov 12 17:31:38 2021 -0800
Add link to the ZeroInWord algorithm. (#7764)
Added link to the ZeroInWord Algorithm used in
`FixedByteValueReaderWriter.getUnpaddedString()`.
---
.../apache/pinot/segment/local/io/util/FixedByteValueReaderWriter.java | 1 +
1 file changed, 1 insertion(+)
diff --git
a/pinot-segment-local/src/main/java/org/apache/pinot/segment/local/io/util/FixedByteValueReaderWriter.java
b/pinot-segment-local/src/main/java/org/apache/pinot/segment/local/io/util/FixedByteValueReaderWriter.java
index 620b671..6e8dfa6 100644
---
a/pinot-segment-local/src/main/java/org/apache/pinot/segment/local/io/util/FixedByteValueReaderWriter.java
+++
b/pinot-segment-local/src/main/java/org/apache/pinot/segment/local/io/util/FixedByteValueReaderWriter.java
@@ -55,6 +55,7 @@ public final class FixedByteValueReaderWriter implements
ValueReader {
@Override
public String getUnpaddedString(int index, int numBytesPerValue, byte
paddingByte, byte[] buffer) {
+ // Based on the ZeroInWord algorithm:
http://graphics.stanford.edu/~seander/bithacks.html#ZeroInWord
assert buffer.length >= numBytesPerValue;
long startOffset = (long) index * numBytesPerValue;
long pattern = (paddingByte & 0xFFL) * 0x101010101010101L;
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