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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/utilities/merge_operators/bytesxor.h | |
parent | Initial commit. (diff) | |
download | ceph-e6918187568dbd01842d8d1d2c808ce16a894239.tar.xz ceph-e6918187568dbd01842d8d1d2c808ce16a894239.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/utilities/merge_operators/bytesxor.h')
-rw-r--r-- | src/rocksdb/utilities/merge_operators/bytesxor.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/rocksdb/utilities/merge_operators/bytesxor.h b/src/rocksdb/utilities/merge_operators/bytesxor.h new file mode 100644 index 000000000..3c7baacce --- /dev/null +++ b/src/rocksdb/utilities/merge_operators/bytesxor.h @@ -0,0 +1,40 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). + +#pragma once + +#include <algorithm> +#include <memory> +#include <string> + +#include "rocksdb/env.h" +#include "rocksdb/merge_operator.h" +#include "rocksdb/slice.h" +#include "util/coding.h" +#include "utilities/merge_operators.h" + +namespace ROCKSDB_NAMESPACE { + +// A 'model' merge operator that XORs two (same sized) array of bytes. +// Implemented as an AssociativeMergeOperator for simplicity and example. +class BytesXOROperator : public AssociativeMergeOperator { + public: + // XORs the two array of bytes one byte at a time and stores the result + // in new_value. len is the number of xored bytes, and the length of new_value + virtual bool Merge(const Slice& key, const Slice* existing_value, + const Slice& value, std::string* new_value, + Logger* logger) const override; + + static const char* kClassName() { return "BytesXOR"; } + static const char* kNickName() { return "bytesxor"; } + + const char* NickName() const override { return kNickName(); } + const char* Name() const override { return kClassName(); } + + void XOR(const Slice* existing_value, const Slice& value, + std::string* new_value) const; +}; + +} // namespace ROCKSDB_NAMESPACE |