//.........jun hirabayashi............................
// this C++ class was ported and modified from C# class
// http://www.ussg.iu.edu/hypermail/linux/kernel/0412.1/0974.html

#include "windows.h"
#include <iostream>

//.............加速度構造体......................
struct ShockData
{
    int status;
    short int  x0;
    short int  y0;
    short int  x1;
    short int  y1;
    short int  x2;
    short int  y2;
    short int  x3;
    short int  y3;
    short int  x4;
    short int  y4;
    short int  x5;
    short int  y5;
    short int  x6;
    short int  y6;
    short int  x7;
    short int  y7;
    short int  x8;
    short int  y8;
    short int  x9;
    short int  y9;
    short int  x10;
    short int  y10;
    short int  x11;
    short int  y11;
    short int  x12;
    short int  y12;
    short int  x13;
    short int  y13;
    short int  unknown0;
    short int  unknown1;
};
//.............加速度取得用クラス...................
class Accelerometer{
    private:
        HANDLE hFile;
	    ShockData AccelerometerData;
        int OffsetX;
        int OffsetY;
    protected:
    public:
        Accelerometer();
        ~Accelerometer();
        bool GetAccelerometerData(void);
        int  Status(void);
        int  X;
        int  Y;
};
//.............コンストラクタ.......................
Accelerometer::Accelerometer()
{
    try
    {
        hFile = CreateFile("\\\\.\\ShockMgr", GENERIC_READ,
                            FILE_SHARE_READ | FILE_SHARE_WRITE,
			                NULL, OPEN_EXISTING, 0, NULL);
        if(hFile == INVALID_HANDLE_VALUE)
            throw "Failed to open ShockMgr.";
    }
    catch(...){}
    OffsetX = 0;
    OffsetY = 0;
    if ( GetAccelerometerData() )
    {
        OffsetX = -X;
        OffsetY = -Y;
        GetAccelerometerData();
    }
}
//.............デストラクタ....................
Accelerometer::~Accelerometer()
{
    CloseHandle(hFile);
}
//.............加速度取得する.....................
bool Accelerometer::GetAccelerometerData(void)
{
    unsigned long ulRead = 0;
    try
    {
        if( !DeviceIoControl( hFile, 0x733fc, NULL,  0, // via IOCTL(0x733fc)
                              (void *)&AccelerometerData, 0x24, &ulRead, NULL))
            throw "Failed to DeviceIoControl";
        X = AccelerometerData.x0 + OffsetX;
        Y = AccelerometerData.y0 + OffsetY;
        return true;
    }
    catch(...)
    {
        return false;
    }
    return false;
}
//.............状況出力.......................
int Accelerometer::Status(void)
{
    return AccelerometerData.status;
}