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// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QWINREGISTRY_H
#define QWINREGISTRY_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qpair.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringview.h>
#include <QtCore/qt_windows.h>
#include <QtCore/qvariant.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QWinRegistryKey
{
Q_DISABLE_COPY(QWinRegistryKey)
public:
QWinRegistryKey();
explicit QWinRegistryKey(HKEY parentHandle, QStringView subKey,
REGSAM permissions = KEY_READ, REGSAM access = 0);
~QWinRegistryKey();
QWinRegistryKey(QWinRegistryKey &&other) noexcept
: m_key(std::exchange(other.m_key, nullptr)) {}
QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_MOVE_AND_SWAP(QWinRegistryKey)
void swap(QWinRegistryKey &other) noexcept { qSwap(m_key, other.m_key); }
[[nodiscard]] bool isValid() const { return m_key != nullptr; }
[[nodiscard]] HKEY handle() const { return m_key; }
operator HKEY() const { return handle(); }
void close();
[[nodiscard]] QVariant value(QStringView subKey) const;
template<typename T>
[[nodiscard]] std::optional<T> value(QStringView subKey) const
{
const QVariant var = value(subKey);
if (var.isValid())
return qvariant_cast<T>(var);
return std::nullopt;
}
// ### TODO: Remove once all usages are migrated to new interface.
QString stringValue(QStringView subKey) const;
std::pair<DWORD, bool> dwordValue(QStringView subKey) const;
private:
HKEY m_key = nullptr;
};
QT_END_NAMESPACE
#endif // QWINREGISTRY_H
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