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 HIVIEW_PLUGINS_EVENT_SERVICE_INCLUDE_FLAT_JSON_PARSER_H 17 #define HIVIEW_PLUGINS_EVENT_SERVICE_INCLUDE_FLAT_JSON_PARSER_H 18 19 #include <vector> 20 21 namespace OHOS { 22 namespace HiviewDFX { 23 class FlatJsonParser { 24 public: 25 FlatJsonParser(const std::string& jsonStr); 26 27 public: 28 static void Initialize(); 29 30 public: 31 void AppendStringValue(const std::string& key, const std::string& value); 32 void AppendUInt64Value(const std::string& key, const uint64_t value); 33 void Parse(const std::string& jsonStr); 34 std::string Print(); 35 36 public: 37 static constexpr int CHAR_RANGE { 256 }; 38 static constexpr uint8_t NUMBER_FLAG { 1 }; 39 static constexpr uint8_t STRING_FLAG { 2 }; 40 static constexpr uint8_t BRACKET_FLAG { 3 }; 41 42 private: 43 std::string ParseKey(const std::string& jsonStr); 44 std::string ParseValue(const std::string& jsonStr); 45 std::string ParseNumer(const std::string& jsonStr); 46 std::string ParseString(const std::string& jsonStr); 47 std::string ParseBrackets(const std::string& jsonStr, char leftBracket); 48 49 private: 50 static uint8_t charFilter_[CHAR_RANGE]; 51 52 private: 53 std::vector<std::pair<std::string, std::string>> kvList_; 54 size_t index_ {0}; 55 }; 56 } // namespace HiviewDFX 57 } // namespace OHOS 58 59 #endif // HIVIEW_PLUGINS_EVENT_SERVICE_INCLUDE_FLAT_JSON_PARSER_H 60