1 /* 2 * Copyright (c) 2025 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 DDK_SYSFS_DEVICES_PARSER_H 17 #define DDK_SYSFS_DEVICES_PARSER_H 18 19 #include <filesystem> 20 #include <optional> 21 #include <regex> 22 23 namespace fs = std::filesystem; 24 25 class SysfsDevNode { 26 public: 27 SysfsDevNode(uint32_t busNum, uint32_t devNum, uint8_t intfNum, const std::string& prefix) noexcept; 28 int32_t FindPath(std::string& devNodePath); 29 30 private: 31 std::optional<std::string> GetContent(const std::string& filePath); 32 33 private: 34 static const std::filesystem::path devDir_; 35 static const std::regex intfPathRegex_; 36 37 uint32_t busNum_; 38 uint32_t devNum_; 39 uint8_t intfNum_; 40 std::string prefix_; 41 std::regex fileNameRegex_; 42 }; 43 44 #endif 45