From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 21 Apr 2024 13:54:28 +0200 Subject: Adding upstream version 18.2.2. Signed-off-by: Daniel Baumann --- src/rocksdb/utilities/merge_operators/bytesxor.h | 40 ++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/rocksdb/utilities/merge_operators/bytesxor.h (limited to 'src/rocksdb/utilities/merge_operators/bytesxor.h') 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 +#include +#include + +#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 -- cgit v1.2.3