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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the qmake application of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qstringlist.h>
#include "registry.h"
/*!
Returns the path part of a registry key.
e.g.
For a key
"Software\\Microsoft\\VisualStudio\\8.0\\Setup\\VC\\ProductDir"
it returns
"Software\\Microsoft\\VisualStudio\\8.0\\Setup\\VC\\"
*/
static QString keyPath(const QString &rKey)
{
int idx = rKey.lastIndexOf(QLatin1Char('\\'));
if (idx == -1)
return QString();
return rKey.left(idx + 1);
}
/*!
Returns the name part of a registry key.
e.g.
For a key
"Software\\Microsoft\\VisualStudio\\8.0\\Setup\\VC\\ProductDir"
it returns
"ProductDir"
*/
static QString keyName(const QString &rKey)
{
int idx = rKey.lastIndexOf(QLatin1Char('\\'));
if (idx == -1)
return rKey;
QString res(rKey.mid(idx + 1));
if (res == "Default" || res == ".")
res = "";
return res;
}
QString readRegistryKey(HKEY parentHandle, const QString &rSubkey)
{
QString result;
#ifdef Q_OS_WIN32
QString rSubkeyName = keyName(rSubkey);
QString rSubkeyPath = keyPath(rSubkey);
HKEY handle = 0;
LONG res = RegOpenKeyEx(parentHandle, (wchar_t*)rSubkeyPath.utf16(), 0, KEY_READ, &handle);
if (res != ERROR_SUCCESS)
return QString();
// get the size and type of the value
DWORD dataType;
DWORD dataSize;
res = RegQueryValueEx(handle, (wchar_t*)rSubkeyName.utf16(), 0, &dataType, 0, &dataSize);
if (res != ERROR_SUCCESS) {
RegCloseKey(handle);
return QString();
}
// get the value
QByteArray data(dataSize, 0);
res = RegQueryValueEx(handle, (wchar_t*)rSubkeyName.utf16(), 0, 0,
reinterpret_cast<unsigned char*>(data.data()), &dataSize);
if (res != ERROR_SUCCESS) {
RegCloseKey(handle);
return QString();
}
switch (dataType) {
case REG_EXPAND_SZ:
case REG_SZ: {
result = QString::fromWCharArray(((const wchar_t *)data.constData()));
break;
}
case REG_MULTI_SZ: {
QStringList l;
int i = 0;
for (;;) {
QString s = QString::fromWCharArray((const wchar_t *)data.constData() + i);
i += s.length() + 1;
if (s.isEmpty())
break;
l.append(s);
}
result = l.join(", ");
break;
}
case REG_NONE:
case REG_BINARY: {
result = QString::fromWCharArray((const wchar_t *)data.constData(), data.size() / 2);
break;
}
case REG_DWORD_BIG_ENDIAN:
case REG_DWORD: {
Q_ASSERT(data.size() == sizeof(int));
int i;
memcpy((char*)&i, data.constData(), sizeof(int));
result = QString::number(i);
break;
}
default:
qWarning("QSettings: unknown data %d type in windows registry", dataType);
break;
}
RegCloseKey(handle);
#endif
return result;
}
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