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