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Diffstat (limited to 'src/corelib/time/qcalendarmath_p.h')
-rw-r--r-- | src/corelib/time/qcalendarmath_p.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/corelib/time/qcalendarmath_p.h b/src/corelib/time/qcalendarmath_p.h new file mode 100644 index 0000000000..61c2c5d2b5 --- /dev/null +++ b/src/corelib/time/qcalendarmath_p.h @@ -0,0 +1,77 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** 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-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QCALENDARMATH_P_H +#define QCALENDARMATH_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists for the convenience +// of q*calendar.cpp. This header file may change from version to version +// without notice, or even be removed. +// +// We mean it. +// + +#include <QtCore/private/qglobal_p.h> + +QT_BEGIN_NAMESPACE + +namespace QRoundingDown { +/* + Division, rounding down (rather than towards zero). + + From C++11 onwards, integer division is defined to round towards zero, so we + can rely on that when implementing this. This is only used with denominator b + > 0, so we only have to treat negative numerator, a, specially. +*/ + +template<typename Int> constexpr Int qDiv(Int a, unsigned b) +{ return (a - (a < 0 ? int(b - 1) : 0)) / int(b); } + +template<typename Int> constexpr Int qMod(Int a, unsigned b) +{ return a - qDiv(a, b) * b; } + +} // QRoundingDown + +QT_END_NAMESPACE + +#endif // QCALENDARMATH_P_H |