71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
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#include <string>
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#include <fstream>
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// key names for properties we use
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namespace properties {
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extern const char* key;
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extern const char* ref;
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extern const char* type;
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extern const char* password;
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}
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/**
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* Class to store data on the unencrypted folder of a device.
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* Note that the folder must exist before this class is constructed.
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* All names must be valid single level (no '/') file or directory names
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* Data is organized hierarchically so we can get a child folder
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*/
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class UnencryptedProperties
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{
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public:
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// Opens properties folder on named device.
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// If folder does not exist, construction will succeed, but all
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// getters will return default properties and setters will fail.
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UnencryptedProperties(const char* device);
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// Get named object. Return default if object does not exist or error.
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template<typename t> t Get(const char* name, t default_value = t());
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// Set named object. Return true if success, false otherwise
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template<typename t> bool Set(const char* name, t const& value);
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// Get child properties
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UnencryptedProperties GetChild(const char* name);
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// Remove named object
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bool Remove(const char* name);
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// Get path of folder
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std::string const& GetPath() const {return folder_;}
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private:
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UnencryptedProperties();
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bool OK() const;
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std::string folder_;
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};
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template<typename t> t UnencryptedProperties::Get(const char* name,
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t default_value)
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{
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if (!OK()) return default_value;
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t value = default_value;
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std::ifstream(folder_ + "/" + name) >> value;
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return value;
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}
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template<typename t> bool UnencryptedProperties::Set(const char* name,
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t const& value)
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{
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if (!OK()) return false;
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std::ofstream o(folder_ + "/" + name);
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o << value;
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return !o.fail();
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}
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// Specialized getters/setters for strings
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template<> std::string UnencryptedProperties::Get(const char* name,
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std::string default_value);
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template<> bool UnencryptedProperties::Set(const char* name,
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std::string const& value);
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