//

// Copyright (C) 2014-2015 Stéphane Lenclud.

//

// This file is part of MiniDisplay.

//

// MiniDisplay is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// MiniDisplay is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with MiniDisplay.  If not, see <http://www.gnu.org/licenses/>.

//

#include "HidDevice.h"

//

// class HidDevice

//

HidDevice::HidDevice():iHidDevice(NULL)

    {

    Close();

    }

/**

*/

HidDevice::~HidDevice()

	{

	Close();

	}

/**

*/

int HidDevice::Open(const char* aPath)

	{

	Close();

	iHidDevice =  hid_open_path(aPath);

	if (!iHidDevice)

		{

		//Fail to connect our device

		return 0;

		}

    FetchStrings();

	return 1;

	}

/**

See hidapi documentation.

*/

int HidDevice::Open(unsigned short aVendorId, unsigned short aProductId, const wchar_t* aSerialNumber)

	{

    Close();

	iHidDevice = hid_open(aVendorId, aProductId, aSerialNumber);

	if (!iHidDevice)

		{

		//Fail to connect our device

		return 0;

		}

    FetchStrings();

	return 1;

	}

/**

Close this HID device

*/

void HidDevice::Close()

	{

	hid_close(iHidDevice); //No effect if device is null

	iHidDevice=NULL;

    //

    memset(iVendor,0,sizeof(iVendor));

    memset(iProduct,0,sizeof(iProduct));

    memset(iSerialNumber,0,sizeof(iSerialNumber));

	}

/**

*/

bool HidDevice::IsOpen()

    {

    return iHidDevice!=NULL;

    }

/**

*/

const wchar_t* HidDevice::Error()

	{

	return hid_error(iHidDevice);

	}

/**

*/

int HidDevice::SetNonBlocking(int aNonBlocking)

	{

	//Success we are now connected to our HID device

	//Set read operation as non blocking

	return hid_set_nonblocking(iHidDevice, aNonBlocking);

	}

/**

*/

wchar_t* HidDevice::Vendor()

    {

    return iVendor;

    }

/**

*/

wchar_t* HidDevice::Product()

    {

    return iProduct;

    }

/**

*/

wchar_t* HidDevice::SerialNumber()

    {

    return iSerialNumber;

    }

/**

*/

void HidDevice::FetchStrings()

    {

    hid_get_manufacturer_string(iHidDevice,iVendor,sizeof(iVendor));

    hid_get_product_string(iHidDevice,iProduct,sizeof(iProduct));

    hid_get_serial_number_string(iHidDevice,iSerialNumber,sizeof(iSerialNumber));

    }