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// Copyright (C) 2025 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 QTMM_ALIGNMENT_SUPPORT_P_H
#define QTMM_ALIGNMENT_SUPPORT_P_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/qglobal.h>
QT_BEGIN_NAMESPACE
namespace QtMultimediaPrivate {
template <typename IntType>
inline constexpr bool isPowerOfTwo(IntType arg)
{
return arg > 0 && (arg & (arg - 1)) == 0;
}
template <typename Type>
constexpr Type alignUp(Type arg, size_t alignment)
{
if constexpr (std::is_pointer_v<Type>) {
return Type(alignUp(std::intptr_t(arg), alignment));
} else {
Q_ASSERT(isPowerOfTwo(alignment));
return Type((arg + (Type(alignment) - 1)) & ~Type(alignment - 1));
}
}
template <typename Type>
constexpr Type alignDown(Type arg, size_t alignment)
{
if constexpr (std::is_pointer_v<Type>) {
return Type(alignDown(std::intptr_t(arg), alignment));
} else {
Q_ASSERT(isPowerOfTwo(alignment));
return arg & ~Type(alignment - 1);
}
}
template <typename IntType>
constexpr bool isAligned(IntType arg, size_t alignment)
{
if constexpr (std::is_pointer_v<IntType>) {
return isAligned(std::intptr_t(arg), alignment);
} else {
Q_ASSERT(isPowerOfTwo(alignment));
return (arg & (IntType(alignment) - 1)) == 0;
}
}
} // namespace QtMultimediaPrivate
QT_END_NAMESPACE
#endif // QTMM_ALIGNMENT_SUPPORT_P_H