gsmiller commented on code in PR #13559:
URL: https://github.com/apache/lucene/pull/13559#discussion_r1697623524
##########
lucene/core/src/java/org/apache/lucene/util/FixedBitSet.java:
##########
@@ -291,6 +291,32 @@ public int nextSetBit(int index) {
return DocIdSetIterator.NO_MORE_DOCS;
}
+ @Override
+ public int firstSetBitInRange(int start, int upperBound) {
+ // Depends on the ghost bits being clear!
+ assert start >= 0 && start < numBits : "index=" + start + ", numBits=" +
numBits;
+ assert start <= upperBound : "index=" + start + ", upperBound=" +
upperBound;
+ int i = start >> 6;
+ long word = bits[i] >> start; // skip all the bits to the right of index
+
+ if (word != 0) {
+ int res = start + Long.numberOfTrailingZeros(word);
+ return res > upperBound ? DocIdSetIterator.NO_MORE_DOCS : res;
+ }
+
+ int maxWord = Math.min((upperBound >> 6) + 1, numWords);
Review Comment:
Ah, that's even better. Thanks!
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