mirror of
https://github.com/crystalidea/qt6windows7.git
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134 lines
3.4 KiB
C++
134 lines
3.4 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include <QtCore/qstringlist.h>
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#include "registry_p.h"
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QT_BEGIN_NAMESPACE
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#ifdef Q_OS_WIN32
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/*
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Returns the path part of a registry key.
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e.g.
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For a key
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"Software\\Microsoft\\VisualStudio\\8.0\\Setup\\VC\\ProductDir"
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it returns
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"Software\\Microsoft\\VisualStudio\\8.0\\Setup\\VC\\"
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*/
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static QString keyPath(const QString &rKey)
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{
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int idx = rKey.lastIndexOf(QLatin1Char('\\'));
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if (idx == -1)
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return QString();
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return rKey.left(idx + 1);
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}
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/*
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Returns the name part of a registry key.
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e.g.
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For a key
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"Software\\Microsoft\\VisualStudio\\8.0\\Setup\\VC\\ProductDir"
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it returns
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"ProductDir"
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*/
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static QString keyName(const QString &rKey)
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{
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int idx = rKey.lastIndexOf(QLatin1Char('\\'));
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if (idx == -1)
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return rKey;
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QString res(rKey.mid(idx + 1));
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if (res == QLatin1String("Default") || res == QLatin1String("."))
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res = QString();
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return res;
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}
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#endif
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QString qt_readRegistryKey(HKEY parentHandle, const QString &rSubkey, unsigned long options)
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{
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QString result;
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#ifdef Q_OS_WIN32
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QString rSubkeyName = keyName(rSubkey);
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QString rSubkeyPath = keyPath(rSubkey);
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HKEY handle = nullptr;
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LONG res = RegOpenKeyEx(parentHandle, (wchar_t*)rSubkeyPath.utf16(), 0,
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KEY_READ | options, &handle);
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if (res != ERROR_SUCCESS)
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return QString();
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// get the size and type of the value
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DWORD dataType;
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DWORD dataSize;
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res = RegQueryValueEx(handle, (wchar_t*)rSubkeyName.utf16(), nullptr, &dataType, nullptr, &dataSize);
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if (res != ERROR_SUCCESS) {
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RegCloseKey(handle);
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return QString();
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}
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// get the value
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QByteArray data(dataSize, 0);
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res = RegQueryValueEx(handle, (wchar_t*)rSubkeyName.utf16(), nullptr, nullptr,
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reinterpret_cast<unsigned char*>(data.data()), &dataSize);
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if (res != ERROR_SUCCESS) {
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RegCloseKey(handle);
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return QString();
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}
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switch (dataType) {
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case REG_EXPAND_SZ:
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case REG_SZ: {
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result = QString::fromWCharArray(((const wchar_t *)data.constData()));
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break;
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}
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case REG_MULTI_SZ: {
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QStringList l;
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int i = 0;
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for (;;) {
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QString s = QString::fromWCharArray((const wchar_t *)data.constData() + i);
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i += s.length() + 1;
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if (s.isEmpty())
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break;
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l.append(s);
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}
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result = l.join(QLatin1String(", "));
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break;
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}
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case REG_NONE:
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case REG_BINARY: {
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result = QString::fromWCharArray((const wchar_t *)data.constData(), data.size() / 2);
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break;
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}
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case REG_DWORD_BIG_ENDIAN:
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case REG_DWORD: {
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Q_ASSERT(data.size() == sizeof(int));
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int i;
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memcpy((char*)&i, data.constData(), sizeof(int));
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result = QString::number(i);
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break;
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}
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default:
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qWarning("QSettings: unknown data %u type in windows registry", quint32(dataType));
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break;
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}
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RegCloseKey(handle);
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#else
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Q_UNUSED(parentHandle);
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Q_UNUSED(rSubkey);
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Q_UNUSED(options);
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#endif
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return result;
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}
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QT_END_NAMESPACE
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