bkmgit commented on a change in pull request #11882:
URL: https://github.com/apache/arrow/pull/11882#discussion_r767650639
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File path: cpp/src/arrow/util/bit_block_counter.h
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@@ -586,5 +961,144 @@ static void VisitTwoBitBlocksVoid(const
std::shared_ptr<Buffer>& left_bitmap_buf
}
}
+template <typename VisitNotNull, typename VisitNull>
+static void VisitThreeBitBlocksVoid(
+ const std::shared_ptr<Buffer>& left_bitmap_buf, int64_t left_offset,
+ const std::shared_ptr<Buffer>& mid_bitmap_buf, int64_t mid_offset,
+ const std::shared_ptr<Buffer>& right_bitmap_buf, int64_t right_offset,
int64_t length,
+ VisitNotNull&& visit_not_null, VisitNull&& visit_null) {
+ if (((left_bitmap_buf == NULLPTR) && (mid_bitmap_buf == NULLPTR)) ||
+ ((mid_bitmap_buf == NULLPTR) && (right_bitmap_buf == NULLPTR)) ||
+ ((left_bitmap_buf == NULLPTR) && (right_bitmap_buf == NULLPTR))) {
+ // At most one bitmap is present
+ if ((left_bitmap_buf == NULLPTR) && (mid_bitmap_buf == NULLPTR)) {
+ return VisitBitBlocksVoid(right_bitmap_buf, right_offset, length,
+ std::forward<VisitNotNull>(visit_not_null),
+ std::forward<VisitNull>(visit_null));
+ } else if ((mid_bitmap_buf == NULLPTR) && (right_bitmap_buf == NULLPTR)) {
+ return VisitBitBlocksVoid(left_bitmap_buf, left_offset, length,
+ std::forward<VisitNotNull>(visit_not_null),
+ std::forward<VisitNull>(visit_null));
+ } else {
+ return VisitBitBlocksVoid(mid_bitmap_buf, mid_offset, length,
+ std::forward<VisitNotNull>(visit_not_null),
+ std::forward<VisitNull>(visit_null));
+ }
+ }
+ // Two bitmaps are present
+ if (left_bitmap_buf == NULLPTR) {
+ const uint8_t* mid_bitmap = mid_bitmap_buf->data();
Review comment:
Thanks for the suggestion.
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