1 /* 2 * Copyright (c) 2021-2022 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 16 #ifndef HISYSEVENT_FRAMEWORKS_NATIVE_INCLUDE_JSON_FLATTEN_PARSER_H 17 #define HISYSEVENT_FRAMEWORKS_NATIVE_INCLUDE_JSON_FLATTEN_PARSER_H 18 19 #include <functional> 20 #include <vector> 21 22 namespace OHOS { 23 namespace HiviewDFX { 24 using KV = std::pair<std::string, std::string>; 25 using PrintKvHandler = std::function<std::string(KV&)>; 26 class JsonFlattenParser { 27 public: 28 JsonFlattenParser(const std::string& json); 29 30 public: 31 static void Initialize(); 32 33 public: 34 void Parse(const std::string& json); 35 std::string Print(PrintKvHandler handler); 36 37 public: 38 static constexpr uint8_t BRACKET_FLAG { 3 }; 39 static constexpr uint8_t NUMBER_FLAG { 1 }; 40 static constexpr uint8_t STRING_FLAG { 2 }; 41 static constexpr int CHAR_RANGE { 256 }; 42 43 private: 44 std::string ParseBrackets(const std::string& json, char leftBracket); 45 std::string ParseKey(const std::string& json); 46 std::string ParseNumer(const std::string& json); 47 std::string ParseString(const std::string& json); 48 std::string ParseValue(const std::string& json); 49 50 private: 51 static uint8_t charFilter[CHAR_RANGE]; 52 std::vector<KV> kvList; 53 size_t curPos {0}; 54 }; 55 } // namespace HiviewDFX 56 } // namespace OHOS 57 58 #endif // HISYSEVENT_FRAMEWORKS_NATIVE_INCLUDE_JSON_FLATTEN_PARSER_H 59