Preferences.h

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2011. All Rights Reserved.                                                         */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib.  */
/*----------------------------------------------------------------------------*/

#ifndef __PREFERENCES_H__
#define __PREFERENCES_H__

#include "ErrorBase.h"
#include "NetworkTables/NetworkTableChangeListener.h"
#include "Task.h"
#include <map>
#include <semLib.h>
#include <string>
#include <vector>

class Preferences : public ErrorBase, public NetworkTableChangeListener
{
public:
        static Preferences *GetInstance();

        std::vector<std::string> GetKeys();
        std::string GetString(const char *key, const char *defaultValue = "");
        int GetString(const char *key, char *value, int valueSize, const char *defaultValue = "");
        int GetInt(const char *key, int defaultValue = 0);
        double GetDouble(const char *key, double defaultValue = 0.0);
        float GetFloat(const char *key, float defaultValue = 0.0);
        bool GetBoolean(const char *key, bool defaultValue = false);
        INT64 GetLong(const char *key, INT64 defaultValue = 0);
        void PutString(const char *key, const char *value);
        void PutInt(const char *key, int value);
        void PutDouble(const char *key, double value);
        void PutFloat(const char *key, float value);
        void PutBoolean(const char *key, bool value);
        void PutLong(const char *key, INT64 value);
        void Save();
        bool ContainsKey(const char *key);
        void Remove(const char *key);

protected:
        Preferences();
        virtual ~Preferences();

private:
        std::string Get(const char *key);
        void Put(const char *key, std::string value);

        void ReadTaskRun();
        void WriteTaskRun();

        virtual void ValueChanged(NetworkTable *table, const char *name, NetworkTables_Types type);
        virtual void ValueConfirmed(NetworkTable *table, const char *name, NetworkTables_Types type);

        static int InitReadTask(Preferences *obj) {obj->ReadTaskRun();return 0;}
        static int InitWriteTask(Preferences *obj) {obj->WriteTaskRun();return 0;}

        static Preferences *_instance;

        SEM_ID m_fileLock;
        SEM_ID m_fileOpStarted;
        SEM_ID m_tableLock;
        typedef std::map<std::string, std::string> StringMap;
        StringMap m_values;
        std::vector<std::string> m_keys;
        StringMap m_comments;
        std::string m_endComment;
        Task m_readTask;
        Task m_writeTask;
};

#endif