1 #pragma once 2 3 /* 4 * Copyright (C) 2021 The Android Open Source Project 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include <chrono> 20 #include <memory> 21 #include <ostream> 22 #include <vector> 23 24 namespace aidl { 25 namespace google { 26 namespace hardware { 27 namespace power { 28 namespace impl { 29 namespace pixel { 30 31 // Abstracted so we can mock in tests. 32 class IFilesystem { 33 public: ~IFilesystem()34 virtual ~IFilesystem() {} 35 virtual bool ListDirectory(const std::string &path, std::vector<std::string> *result) const = 0; 36 virtual bool ReadFileStream(const std::string &path, 37 std::unique_ptr<std::istream> *result) const = 0; 38 // Resets the file stream, so that the next read will read from the beginning. 39 // This function exists in IFilesystem rather than using istream::seekg directly. This is 40 // so we can mock this function in tests, allowing us to return different data on reset. 41 virtual bool ResetFileStream(const std::unique_ptr<std::istream> &fileStream) const = 0; 42 }; 43 44 } // namespace pixel 45 } // namespace impl 46 } // namespace power 47 } // namespace hardware 48 } // namespace google 49 } // namespace aidl 50