fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.4 KiB
42 lines
1.4 KiB
// 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).
|
|
|
|
#ifndef UTILITIES_MERGE_OPERATORS_BYTESXOR_H_
|
|
#define UTILITIES_MERGE_OPERATORS_BYTESXOR_H_
|
|
|
|
#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 {
|
|
|
|
// 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;
|
|
|
|
virtual const char* Name() const override {
|
|
return "BytesXOR";
|
|
}
|
|
|
|
void XOR(const Slice* existing_value, const Slice& value,
|
|
std::string* new_value) const;
|
|
};
|
|
|
|
} // namespace rocksdb
|
|
|
|
#endif // UTILITIES_MERGE_OPERATORS_BYTESXOR_H_
|
|
|