| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef OTAPREOPT_SYSTEM_PROPERTIES_H_ |
| #define OTAPREOPT_SYSTEM_PROPERTIES_H_ |
| |
| #include <fstream> |
| #include <string> |
| #include <unordered_map> |
| |
| namespace android { |
| namespace installd { |
| |
| // Helper class to read system properties into and manage as a string->string map. |
| class SystemProperties { |
| public: |
| bool Load(const std::string& strFile) { |
| std::ifstream input_stream(strFile); |
| |
| if (!input_stream.is_open()) { |
| return false; |
| } |
| |
| while (!input_stream.eof()) { |
| // Read the next line. |
| std::string line; |
| getline(input_stream, line); |
| |
| // Is the line empty? Simplifies the next check. |
| if (line.empty()) { |
| continue; |
| } |
| |
| // Is this a comment (starts with pound)? |
| if (line[0] == '#') { |
| continue; |
| } |
| |
| size_t equals_pos = line.find('='); |
| if (equals_pos == std::string::npos || equals_pos == 0) { |
| // Did not find equals sign, or it's the first character - isn't a valid line. |
| continue; |
| } |
| |
| std::string key = line.substr(0, equals_pos); |
| std::string value = line.substr(equals_pos + 1, |
| line.length() - equals_pos + 1); |
| |
| properties_.insert(std::make_pair(key, value)); |
| } |
| |
| return true; |
| } |
| |
| // Look up the key in the map. Returns null if the key isn't mapped. |
| const std::string* GetProperty(const std::string& key) const { |
| auto it = properties_.find(key); |
| if (it != properties_.end()) { |
| return &it->second; |
| } |
| return nullptr; |
| } |
| |
| void SetProperty(const std::string& key, const std::string& value) { |
| properties_.insert(std::make_pair(key, value)); |
| } |
| |
| private: |
| // The actual map. |
| std::unordered_map<std::string, std::string> properties_; |
| }; |
| |
| } // namespace installd |
| } // namespace android |
| |
| #endif // OTAPREOPT_SYSTEM_PROPERTIES_H_ |