pitrou commented on a change in pull request #8126:
URL: https://github.com/apache/arrow/pull/8126#discussion_r485028381
##########
File path: cpp/src/arrow/buffer.cc
##########
@@ -277,13 +277,18 @@ Result<std::unique_ptr<ResizableBuffer>>
AllocateResizableBuffer(const int64_t s
}
Result<std::shared_ptr<Buffer>> AllocateBitmap(int64_t length, MemoryPool*
pool) {
- return AllocateBuffer(BitUtil::BytesForBits(length), pool);
+ ARROW_ASSIGN_OR_RAISE(auto buf,
AllocateBuffer(BitUtil::BytesForBits(length), pool));
+ // Zero out any trailing bits
+ if (buf->size() > 0) {
+ buf->mutable_data()[buf->size() - 1] = 0;
+ }
+ return std::move(buf);
}
Result<std::shared_ptr<Buffer>> AllocateEmptyBitmap(int64_t length,
MemoryPool* pool) {
- ARROW_ASSIGN_OR_RAISE(auto buf, AllocateBitmap(length, pool));
+ ARROW_ASSIGN_OR_RAISE(auto buf,
AllocateBuffer(BitUtil::BytesForBits(length), pool));
Review comment:
It's not much of a change either :-)
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