qt-everywhere-src-5.14.1/qtbase/src/corelib/time/qcalendarmath_p.h

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#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