diff options
Diffstat (limited to 'qmake/library/registry.cpp')
-rw-r--r-- | qmake/library/registry.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/qmake/library/registry.cpp b/qmake/library/registry.cpp new file mode 100644 index 0000000000..3391ab9512 --- /dev/null +++ b/qmake/library/registry.cpp @@ -0,0 +1,158 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the qmake application of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:GPL-EXCEPT$ +** 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 as published by the Free Software +** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtCore/qstringlist.h> +#include "registry_p.h" + +QT_BEGIN_NAMESPACE + +#ifdef Q_OS_WIN32 +/* + 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 == QLatin1String("Default") || res == QLatin1String(".")) + res = QString(); + return res; +} +#endif + +QString qt_readRegistryKey(HKEY parentHandle, const QString &rSubkey, unsigned long options) +{ + QString result; + +#ifdef Q_OS_WIN32 + QString rSubkeyName = keyName(rSubkey); + QString rSubkeyPath = keyPath(rSubkey); + + HKEY handle = nullptr; + LONG res = RegOpenKeyEx(parentHandle, (wchar_t*)rSubkeyPath.utf16(), 0, + KEY_READ | options, &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(), nullptr, &dataType, nullptr, &dataSize); + if (res != ERROR_SUCCESS) { + RegCloseKey(handle); + return QString(); + } + + // get the value + QByteArray data(dataSize, 0); + res = RegQueryValueEx(handle, (wchar_t*)rSubkeyName.utf16(), nullptr, nullptr, + 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(QLatin1String(", ")); + 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 %u type in windows registry", quint32(dataType)); + break; + } + + RegCloseKey(handle); +#else + Q_UNUSED(parentHandle); + Q_UNUSED(rSubkey) + Q_UNUSED(options); +#endif + + return result; +} + +QT_END_NAMESPACE + |