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/*
* 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>
#include <file_parsing.h>
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) {
return ParseFile(strFile, [&](const std::string& line) {
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.
return true;
}
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_
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