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#include "qextserialenumerator.h"
#include <QDebug>
#include <QMetaType>
#include <objbase.h>
#include <initguid.h>
#ifdef Q_OS_WIN
#ifndef _MSC_VER
#include <windows.h>
#include <dbt.h>
#include <QtCore/qglobal.h>
#endif
#endif
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QextSerialEnumerator::QextSerialEnumerator( )
{
if( !QMetaType::isRegistered( QMetaType::type("QextPortInfo") ) )
qRegisterMetaType<QextPortInfo>("QextPortInfo");
#if (defined QT_GUI_LIB)
notificationWidget = 0;
#endif // Q_OS_WIN
}
QextSerialEnumerator::~QextSerialEnumerator( )
{
#if (defined QT_GUI_LIB)
if( notificationWidget )
delete notificationWidget;
#endif
}
// see http://msdn.microsoft.com/en-us/library/ms791134.aspx for list of GUID classes
#ifndef GUID_DEVCLASS_PORTS
DEFINE_GUID(GUID_DEVCLASS_PORTS, 0x4D36E978, 0xE325, 0x11CE, 0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18 );
#endif
/* Gordon Schumacher's macros for TCHAR -> QString conversions and vice versa */
#ifdef UNICODE
#define QStringToTCHAR(x) (wchar_t*) x.utf16()
#define PQStringToTCHAR(x) (wchar_t*) x->utf16()
#define TCHARToQString(x) QString::fromUtf16((ushort*)(x))
#define TCHARToQStringN(x,y) QString::fromUtf16((ushort*)(x),(y))
#else
#define QStringToTCHAR(x) x.local8Bit().constData()
#define PQStringToTCHAR(x) x->local8Bit().constData()
#define TCHARToQString(x) QString::fromLocal8Bit((x))
#define TCHARToQStringN(x,y) QString::fromLocal8Bit((x),(y))
#endif /*UNICODE*/
//static
QString QextSerialEnumerator::getRegKeyValue(HKEY key, LPCTSTR property)
{
DWORD size = 0;
DWORD type;
RegQueryValueEx(key, property, NULL, NULL, NULL, & size);
BYTE* buff = new BYTE[size];
QString result;
if( RegQueryValueEx(key, property, NULL, &type, buff, & size) == ERROR_SUCCESS )
result = TCHARToQString(buff);
RegCloseKey(key);
delete [] buff;
return result;
}
//static
QString QextSerialEnumerator::getDeviceProperty(HDEVINFO devInfo, PSP_DEVINFO_DATA devData, DWORD property)
{
DWORD buffSize = 0;
SetupDiGetDeviceRegistryProperty(devInfo, devData, property, NULL, NULL, 0, & buffSize);
BYTE* buff = new BYTE[buffSize];
SetupDiGetDeviceRegistryProperty(devInfo, devData, property, NULL, buff, buffSize, NULL);
QString result = TCHARToQString(buff);
delete [] buff;
return result;
}
QList<QextPortInfo> QextSerialEnumerator::getPorts()
{
QList<QextPortInfo> ports;
enumerateDevicesWin(GUID_DEVCLASS_PORTS, &ports);
return ports;
}
void QextSerialEnumerator::enumerateDevicesWin( const GUID & guid, QList<QextPortInfo>* infoList )
{
HDEVINFO devInfo;
if( (devInfo = SetupDiGetClassDevs(&guid, NULL, NULL, DIGCF_PRESENT)) != INVALID_HANDLE_VALUE)
{
SP_DEVINFO_DATA devInfoData;
devInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for(int i = 0; SetupDiEnumDeviceInfo(devInfo, i, &devInfoData); i++)
{
QextPortInfo info;
info.productID = info.vendorID = 0;
getDeviceDetailsWin( &info, devInfo, &devInfoData );
infoList->append(info);
}
SetupDiDestroyDeviceInfoList(devInfo);
}
}
#ifdef QT_GUI_LIB
bool QextSerialRegistrationWidget::winEvent( MSG* message, long* result )
{
if ( message->message == WM_DEVICECHANGE ) {
qese->onDeviceChangeWin( message->wParam, message->lParam );
*result = 1;
return true;
}
return false;
}
#endif
void QextSerialEnumerator::setUpNotifications( )
{
#ifdef QT_GUI_LIB
if(notificationWidget)
return;
notificationWidget = new QextSerialRegistrationWidget(this);
DEV_BROADCAST_DEVICEINTERFACE dbh;
ZeroMemory(&dbh, sizeof(dbh));
dbh.dbcc_size = sizeof(dbh);
dbh.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
CopyMemory(&dbh.dbcc_classguid, &GUID_DEVCLASS_PORTS, sizeof(GUID));
if( RegisterDeviceNotification( notificationWidget->winId( ), &dbh, DEVICE_NOTIFY_WINDOW_HANDLE ) == NULL)
qWarning() << "RegisterDeviceNotification failed:" << GetLastError();
// setting up notifications doesn't tell us about devices already connected
// so get those manually
foreach( QextPortInfo port, getPorts() )
emit deviceDiscovered( port );
#else
qWarning("QextSerialEnumerator: GUI not enabled - can't register for device notifications.");
#endif // QT_GUI_LIB
}
LRESULT QextSerialEnumerator::onDeviceChangeWin( WPARAM wParam, LPARAM lParam )
{
if ( DBT_DEVICEARRIVAL == wParam || DBT_DEVICEREMOVECOMPLETE == wParam )
{
PDEV_BROADCAST_HDR pHdr = (PDEV_BROADCAST_HDR)lParam;
if( pHdr->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE )
{
PDEV_BROADCAST_DEVICEINTERFACE pDevInf = (PDEV_BROADCAST_DEVICEINTERFACE)pHdr;
// delimiters are different across APIs...change to backslash. ugh.
QString deviceID = TCHARToQString(pDevInf->dbcc_name).toUpper().replace("#", "\\");
matchAndDispatchChangedDevice(deviceID, GUID_DEVCLASS_PORTS, wParam);
}
}
return 0;
}
bool QextSerialEnumerator::matchAndDispatchChangedDevice(const QString & deviceID, const GUID & guid, WPARAM wParam)
{
bool rv = false;
DWORD dwFlag = (DBT_DEVICEARRIVAL == wParam) ? DIGCF_PRESENT : DIGCF_ALLCLASSES;
HDEVINFO devInfo;
if( (devInfo = SetupDiGetClassDevs(&guid,NULL,NULL,dwFlag)) != INVALID_HANDLE_VALUE )
{
SP_DEVINFO_DATA spDevInfoData;
spDevInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for(int i=0; SetupDiEnumDeviceInfo(devInfo, i, &spDevInfoData); i++)
{
DWORD nSize=0 ;
TCHAR buf[MAX_PATH];
if ( SetupDiGetDeviceInstanceId(devInfo, &spDevInfoData, buf, MAX_PATH, &nSize) &&
deviceID.contains(TCHARToQString(buf))) // we found a match
{
rv = true;
QextPortInfo info;
info.productID = info.vendorID = 0;
getDeviceDetailsWin( &info, devInfo, &spDevInfoData, wParam );
if( wParam == DBT_DEVICEARRIVAL )
emit deviceDiscovered(info);
else if( wParam == DBT_DEVICEREMOVECOMPLETE )
emit deviceRemoved(info);
break;
}
}
SetupDiDestroyDeviceInfoList(devInfo);
}
return rv;
}
bool QextSerialEnumerator::getDeviceDetailsWin( QextPortInfo* portInfo, HDEVINFO devInfo, PSP_DEVINFO_DATA devData, WPARAM wParam )
{
portInfo->friendName = getDeviceProperty(devInfo, devData, SPDRP_FRIENDLYNAME);
if( wParam == DBT_DEVICEARRIVAL)
portInfo->physName = getDeviceProperty(devInfo, devData, SPDRP_PHYSICAL_DEVICE_OBJECT_NAME);
portInfo->enumName = getDeviceProperty(devInfo, devData, SPDRP_ENUMERATOR_NAME);
QString hardwareIDs = getDeviceProperty(devInfo, devData, SPDRP_HARDWAREID);
HKEY devKey = SetupDiOpenDevRegKey(devInfo, devData, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ);
QRegExp rx("^COM(\\d+)");
QString fullName(getRegKeyValue(devKey, TEXT("PortName")));
if(fullName.contains(rx)) {
int portnum = rx.cap(1).toInt();
if(portnum > 9) // COM ports greater than 9 need \\.\ prepended
fullName.prepend("\\\\.\\");
}
portInfo->portName = fullName;
QRegExp idRx("VID_(\\w+)&PID_(\\w+)");
if( hardwareIDs.toUpper().contains(idRx) )
{
bool dummy;
portInfo->vendorID = idRx.cap(1).toInt(&dummy, 16);
portInfo->productID = idRx.cap(2).toInt(&dummy, 16);
//qDebug() << "got vid:" << vid << "pid:" << pid;
}
return true;
}