1  /*
2   * Copyright (c) 2021 Huawei Device Co., Ltd.
3   * Licensed under the Apache License, Version 2.0 (the "License");
4   * you may not use this file except in compliance with the License.
5   * You may obtain a copy of the License at
6   *
7   *     http://www.apache.org/licenses/LICENSE-2.0
8   *
9   * Unless required by applicable law or agreed to in writing, software
10   * distributed under the License is distributed on an "AS IS" BASIS,
11   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12   * See the License for the specific language governing permissions and
13   * limitations under the License.
14   */
15  #define LOG_TAG "KvStoreUtils"
16  
17  #include "kvstore_utils.h"
18  #include <limits>
19  
20  namespace OHOS {
21  namespace DistributedKv {
22  constexpr int32_t HEAD_SIZE = 3;
23  constexpr int32_t END_SIZE = 3;
24  constexpr int32_t MIN_SIZE = HEAD_SIZE + END_SIZE + 3;
25  constexpr const char *REPLACE_CHAIN = "***";
26  constexpr const char *DEFAULT_ANONYMOUS = "******";
27  std::atomic<uint64_t> KvStoreUtils::sequenceId_{ 0 };
ToBeAnonymous(const std::string & name)28  std::string KvStoreUtils::ToBeAnonymous(const std::string &name)
29  {
30      if (name.length() <= HEAD_SIZE) {
31          return DEFAULT_ANONYMOUS;
32      }
33  
34      if (name.length() < MIN_SIZE) {
35          return (name.substr(0, HEAD_SIZE) + REPLACE_CHAIN);
36      }
37  
38      return (name.substr(0, HEAD_SIZE) + REPLACE_CHAIN + name.substr(name.length() - END_SIZE, END_SIZE));
39  }
40  
GenerateSequenceId()41  uint64_t KvStoreUtils::GenerateSequenceId()
42  {
43      uint64_t seqId = ++sequenceId_;
44      if (seqId == std::numeric_limits<uint64_t>::max()) {
45          return ++sequenceId_;
46      }
47      return seqId;
48  }
49  } // namespace DistributedKv
50  } // namespace OHOS
51