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/****************************************************************************
**
** Copyright (C) 2011-2012 Denis Shienkov <denis.shienkov@gmail.com>
** Copyright (C) 2011 Sergey Belyashov <Sergey.Belyashov@gmail.com>
** Copyright (C) 2012 Laszlo Papp <lpapp@kde.org>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSerialPort module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qserialportinfo.h"
#include "qserialportinfo_p.h"
#include "qserialport_p.h"
#include <QtCore/qstringlist.h>
QT_BEGIN_NAMESPACE
static QString findDescription(HKEY parentKeyHandle, const QString &subKey)
{
const static QString valueName(QStringLiteral("FriendlyName"));
QString result;
HKEY hSubKey = 0;
LONG res = ::RegOpenKeyEx(parentKeyHandle, reinterpret_cast<const wchar_t *>(subKey.utf16()),
0, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS, &hSubKey);
if (res == ERROR_SUCCESS) {
DWORD dataType = 0;
DWORD dataSize = 0;
res = ::RegQueryValueEx(hSubKey, reinterpret_cast<const wchar_t *>(valueName.utf16()),
NULL, &dataType, NULL, &dataSize);
if (res == ERROR_SUCCESS) {
QByteArray data(dataSize, 0);
res = ::RegQueryValueEx(hSubKey, reinterpret_cast<const wchar_t *>(valueName.utf16()),
NULL, NULL,
reinterpret_cast<unsigned char *>(data.data()),
&dataSize);
if (res == ERROR_SUCCESS) {
switch (dataType) {
case REG_EXPAND_SZ:
case REG_SZ:
if (dataSize)
result = QString::fromWCharArray(reinterpret_cast<const wchar_t *>(data.constData()));
break;
default:
break;
}
}
} else {
DWORD index = 0;
dataSize = 255; // Max. key length (see MSDN).
QByteArray data(dataSize, 0);
while (::RegEnumKeyEx(hSubKey, index++,
reinterpret_cast<wchar_t *>(data.data()), &dataSize,
NULL, NULL, NULL, NULL) == ERROR_SUCCESS) {
result = findDescription(hSubKey,
QString::fromUtf16(reinterpret_cast<ushort *>(data.data()), dataSize));
if (!result.isEmpty())
break;
}
}
::RegCloseKey(hSubKey);
}
return result;
}
QList<QSerialPortInfo> QSerialPortInfo::availablePorts()
{
QList<QSerialPortInfo> serialPortInfoList;
DEVMGR_DEVICE_INFORMATION di;
di.dwSize = sizeof(di);
const HANDLE hSearch = ::FindFirstDevice(DeviceSearchByLegacyName,
L"COM*",
&di);
if (hSearch != INVALID_HANDLE_VALUE) {
do {
QSerialPortInfoPrivate priv;
priv.device = QString::fromWCharArray(di.szLegacyName);
priv.portName = QSerialPortInfoPrivate::portNameFromSystemLocation(priv.device);
priv.description = findDescription(HKEY_LOCAL_MACHINE,
QString::fromWCharArray(di.szDeviceKey));
serialPortInfoList.append(priv);
} while (::FindNextDevice(hSearch, &di));
::FindClose(hSearch);
}
return serialPortInfoList;
}
QList<qint32> QSerialPortInfo::standardBaudRates()
{
return QSerialPortPrivate::standardBaudRates();
}
bool QSerialPortInfo::isBusy() const
{
const HANDLE handle = ::CreateFile(reinterpret_cast<const wchar_t*>(systemLocation().utf16()),
GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
if (::GetLastError() == ERROR_ACCESS_DENIED)
return true;
} else {
::CloseHandle(handle);
}
return false;
}
bool QSerialPortInfo::isValid() const
{
const HANDLE handle = ::CreateFile(reinterpret_cast<const wchar_t*>(systemLocation().utf16()),
GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
if (::GetLastError() != ERROR_ACCESS_DENIED)
return false;
} else {
::CloseHandle(handle);
}
return true;
}
QString QSerialPortInfoPrivate::portNameToSystemLocation(const QString &source)
{
return source.endsWith(QLatin1Char(':'))
? source : (source + QLatin1Char(':'));
}
QString QSerialPortInfoPrivate::portNameFromSystemLocation(const QString &source)
{
return source.endsWith(QLatin1Char(':'))
? source.mid(0, source.size() - 1) : source;
}
QT_END_NAMESPACE
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