#include <windows.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <winioctl.h>
#include "gpioctl.h"        // This defines the IOCTL constants.

int main(int argc, char *argv[])
{
    // The following is returned by IOCTL.  It is true if the write succeeds.
    BOOL    IoctlResult;

    // The following parameters are used in the IOCTL call
    HANDLE              hndFile;        // Handle to device, obtain from CreateFile
    GENPORT_WRITE_INPUT InputBuffer;    // Input buffer for DeviceIoControl
    LONG                IoctlCode;
    ULONG               DataValue;
    ULONG               DataLength;
    ULONG               ReturnedLength; // Number of bytes returned in output buffer

    hndFile = CreateFile(
                    "\\\\.\\GpdDev",           // Open the Device "file"
                    GENERIC_WRITE,
                    FILE_SHARE_WRITE,
                    NULL,
                    OPEN_EXISTING,
                    0,
                    NULL);
	sscanf(argv[1],"%x",&DataValue);	
            IoctlCode = IOCTL_GPD_WRITE_PORT_UCHAR;
            InputBuffer.CharData = (UCHAR)DataValue;
            DataLength = offsetof(GENPORT_WRITE_INPUT, CharData) +
                         sizeof(InputBuffer.CharData);
	InputBuffer.PortNumber=2;
    IoctlResult = DeviceIoControl(
                        hndFile,                // Handle to device
                        IoctlCode,              // IO Control code for Write
                        &InputBuffer,           // Buffer to driver.  Holds port & data.
                        DataLength,             // Length of buffer in bytes.
                        NULL,                   // Buffer from driver.   Not used.
                        0,                      // Length of buffer in bytes.
                        &ReturnedLength,        // Bytes placed in outbuf.  Should be 0.
                        NULL                    // NULL means wait till I/O completes.
                        );


    if (IoctlResult)                            // Did the IOCTL succeed?
    {
	    return (0);
    }
    else
    {
        printf(
            "Ioctl failed with code %ld\n", GetLastError() );
    }


    if (!CloseHandle(hndFile))                  // Close the Device "file".
    {
        printf("Failed to close device.\n");
    }

}