qnumeric.h File Reference

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#include <QtCore/qassert.h>
#include <QtCore/qtconfigmacros.h>
#include <QtCore/qtcoreexports.h>
#include <QtCore/qtypes.h>
#include <cmath>
#include <limits>
#include <QtCore/q20type_traits.h>

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Namespaces
namespace	QtPrivate
namespace	QtPrivate::QRoundImpl

Macros
#define	Q_INFINITY   (QT_PREPEND_NAMESPACE(qInf)())
#define	Q_QNAN   (QT_PREPEND_NAMESPACE(qQNaN)())

Functions
template<typename T>
QT_BEGIN_NAMESPACE constexpr std::enable_if< std::is_integral< T >::value, bool >::type	qIsInf (T)
template<typename T>
constexpr std::enable_if< std::is_integral< T >::value, bool >::type	qIsNaN (T)
template<typename T>
constexpr std::enable_if< std::is_integral< T >::value, bool >::type	qIsFinite (T)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool	qIsInf (double d)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool	qIsNaN (double d)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool	qIsFinite (double d)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION int	qFpClassify (double val)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool	qIsInf (float f)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool	qIsNaN (float f)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool	qIsFinite (float f)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION int	qFpClassify (float val)
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION double	qQNaN ()
Q_CORE_EXPORT Q_DECL_CONST_FUNCTION double	qInf ()
Q_CORE_EXPORT quint32	qFloatDistance (float a, float b)
Q_CORE_EXPORT quint64	qFloatDistance (double a, double b)
template<typename T>
constexpr std::enable_if_t< std::is_unsigned_v< T >, bool >	QtPrivate::qAddOverflowGeneric (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t< std::is_same_v< T, decltype(+T{})>, bool >	QtPrivate::qMulOverflowWideMultiplication (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t<(std::is_unsigned_v< T >||std::is_signed_v< T >), bool >	QtPrivate::qMulOverflowGeneric (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t< std::is_unsigned_v< T >, bool >	qAddOverflow (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t< std::is_signed_v< T >, bool >	qAddOverflow (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t< std::is_unsigned_v< T >, bool >	qSubOverflow (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t< std::is_signed_v< T >, bool >	qSubOverflow (T v1, T v2, T *r)
template<typename T>
constexpr std::enable_if_t< std::is_unsigned_v< T >||std::is_signed_v< T >, bool >	qMulOverflow (T v1, T v2, T *r)
template<typename T, T V2>
constexpr bool	qAddOverflow (T v1, std::integral_constant< T, V2 >, T *r)
template<auto V2, typename T>
constexpr bool	qAddOverflow (T v1, T *r)
template<typename T, T V2>
constexpr bool	qSubOverflow (T v1, std::integral_constant< T, V2 >, T *r)
template<auto V2, typename T>
constexpr bool	qSubOverflow (T v1, T *r)
template<typename T, T V2>
constexpr bool	qMulOverflow (T v1, std::integral_constant< T, V2 >, T *r)
template<auto V2, typename T>
constexpr bool	qMulOverflow (T v1, T *r)
template<typename T>
constexpr T	qAbs (const T &t)
template<typename T, typename std::enable_if_t< std::is_integral_v< T >, bool > = true>
constexpr auto	QtPrivate::qUnsignedAbs (T t)
template<typename Result, typename FP, typename std::enable_if_t< std::is_integral_v< Result >, bool > = true, typename std::enable_if_t< std::is_floating_point_v< FP >, bool > = true>
constexpr Result	QtPrivate::qCheckedFPConversionToInteger (FP value)
constexpr double	QtPrivate::QRoundImpl::qRound (double d)
constexpr float	QtPrivate::QRoundImpl::qRound (float d)
template<typename FP, typename std::enable_if_t< std::is_floating_point_v< FP >, bool > = true>
constexpr int	QtPrivate::qSaturateRound (FP value)
constexpr int	qRound (double d)
constexpr int	qRound (float f)
constexpr qint64	qRound64 (double d)
constexpr qint64	qRound64 (float f)
template<typename T>
constexpr const T &	QtPrivate::min (const T &a, const T &b)
constexpr bool	qFuzzyCompare (double p1, double p2) noexcept
constexpr bool	qFuzzyCompare (float p1, float p2) noexcept
constexpr bool	qFuzzyIsNull (double d) noexcept
constexpr bool	qFuzzyIsNull (float f) noexcept
QT_WARNING_PUSH QT_WARNING_DISABLE_FLOAT_COMPARE constexpr bool	qIsNull (double d) noexcept
constexpr bool	qIsNull (float f) noexcept
QT_WARNING_POP int	qIntCast (double f)
int	qIntCast (float f)

Variables
template<typename T, typename Enable = void>
constexpr bool	QtPrivate::HasLargerInt = false
template<typename T>
constexpr bool	QtPrivate::HasLargerInt< T, std::void_t< typename QIntegerForSize< sizeof(T) *2 >::Unsigned > > = true

Macro Definition Documentation

Q_INFINITY

#define Q_INFINITY   (QT_PREPEND_NAMESPACE(qInf)())

Definition at line 80 of file qnumeric.h.

Q_QNAN

#define Q_QNAN   (QT_PREPEND_NAMESPACE(qQNaN)())

Definition at line 84 of file qnumeric.h.

Function Documentation

qAbs()

template<typename T>

T qAbs ( const T & t )

inlineconstexpr

Definition at line 475 of file qnumeric.h.

qAddOverflow() [1/4]

template<typename T, T V2>

bool qAddOverflow ( T v1, std::integral_constant< T, V2 > , T * r )

constexpr

Since

6.1

Equivalent to qAddOverflow(v1, v2, r) with v1 as first argument, the compile time constant V2 as second argument, and r as third argument.

Definition at line 400 of file qnumeric.h.

qAddOverflow() [2/4]

template<auto V2, typename T>

bool qAddOverflow ( T v1, T * r )

constexpr

Since

6.1

Equivalent to qAddOverflow(v1, v2, r) with v1 as first argument, the compile time constant V2 as second argument, and r as third argument.

Definition at line 405 of file qnumeric.h.

qAddOverflow() [3/4]

template<typename T>

std::enable_if_t< std::is_unsigned_v< T >, bool > qAddOverflow ( T v1, T v2, T * r )

inlineconstexpr

Definition at line 262 of file qnumeric.h.

qAddOverflow() [4/4]

template<typename T>

std::enable_if_t< std::is_signed_v< T >, bool > qAddOverflow ( T v1, T v2, T * r )

inlineconstexpr

Definition at line 292 of file qnumeric.h.

qFloatDistance() [1/2]

Q_CORE_EXPORT quint64 qFloatDistance	(	double	a,
		double	b )

qFloatDistance() [2/2]

Q_CORE_EXPORT quint32 qFloatDistance	(	float	a,
		float	b )

qFpClassify() [1/2]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION int qFpClassify

(

double

val

)

Definition at line 98 of file qnumeric.cpp.

qFpClassify() [2/2]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION int qFpClassify

(

float

val

)

Definition at line 99 of file qnumeric.cpp.

qFuzzyCompare() [1/2]

bool qFuzzyCompare ( double p1, double p2 )

nodiscardconstexprnoexcept

Definition at line 578 of file qnumeric.h.

qFuzzyCompare() [2/2]

bool qFuzzyCompare ( float p1, float p2 )

nodiscardconstexprnoexcept

Definition at line 583 of file qnumeric.h.

qFuzzyIsNull() [1/2]

bool qFuzzyIsNull ( double d )

nodiscardconstexprnoexcept

Definition at line 588 of file qnumeric.h.

qFuzzyIsNull() [2/2]

bool qFuzzyIsNull ( float f )

nodiscardconstexprnoexcept

Definition at line 593 of file qnumeric.h.

qInf()

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION double qInf

(

)

qIntCast() [1/2]

QT_WARNING_POP int qIntCast ( double f )

inline

Definition at line 613 of file qnumeric.h.

qIntCast() [2/2]

int qIntCast ( float f )

inline

Definition at line 614 of file qnumeric.h.

qIsFinite() [1/3]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qIsFinite

(

double

d

)

qIsFinite() [2/3]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qIsFinite

(

float

f

)

qIsFinite() [3/3]

template<typename T>

std::enable_if< std::is_integral< T >::value, bool >::type qIsFinite ( T )

constexpr

Definition at line 59 of file qnumeric.h.

qIsInf() [1/3]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qIsInf

(

double

d

)

qIsInf() [2/3]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qIsInf

(

float

f

)

qIsInf() [3/3]

template<typename T>

QT_BEGIN_NAMESPACE constexpr std::enable_if< std::is_integral< T >::value, bool >::type qIsInf ( T )

constexpr

Definition at line 53 of file qnumeric.h.

qIsNaN() [1/3]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qIsNaN

(

double

d

)

qIsNaN() [2/3]

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION bool qIsNaN

(

float

f

)

qIsNaN() [3/3]

template<typename T>

std::enable_if< std::is_integral< T >::value, bool >::type qIsNaN ( T )

constexpr

Definition at line 56 of file qnumeric.h.

qIsNull() [1/2]

QT_WARNING_PUSH QT_WARNING_DISABLE_FLOAT_COMPARE constexpr bool qIsNull ( double d )

nodiscardconstexprnoexcept

Definition at line 601 of file qnumeric.h.

qIsNull() [2/2]

bool qIsNull ( float f )

nodiscardconstexprnoexcept

Definition at line 606 of file qnumeric.h.

qMulOverflow() [1/3]

template<typename T, T V2>

bool qMulOverflow ( T v1, std::integral_constant< T, V2 > , T * r )

constexpr

Since

6.1

Equivalent to qMulOverflow(v1, v2, r) with v1 as first argument, the compile time constant V2 as second argument, and r as third argument. This can be faster than calling the version with only variable arguments.

Definition at line 420 of file qnumeric.h.

qMulOverflow() [2/3]

template<auto V2, typename T>

bool qMulOverflow ( T v1, T * r )

constexpr

Since

6.1

Equivalent to qMulOverflow(v1, v2, r) with v1 as first argument, the compile time constant V2 as second argument, and r as third argument. This can be faster than calling the version with only variable arguments.

Definition at line 467 of file qnumeric.h.

qMulOverflow() [3/3]

template<typename T>

std::enable_if_t< std::is_unsigned_v< T >||std::is_signed_v< T >, bool > qMulOverflow ( T v1, T v2, T * r )

inlineconstexpr

Definition at line 354 of file qnumeric.h.

qQNaN()

Q_CORE_EXPORT Q_DECL_CONST_FUNCTION double qQNaN

(

)

qRound() [1/2]

int qRound ( double d )

inlineconstexpr

Definition at line 553 of file qnumeric.h.

qRound() [2/2]

int qRound ( float f )

inlineconstexpr

Definition at line 558 of file qnumeric.h.

qRound64() [1/2]

qint64 qRound64 ( double d )

inlineconstexpr

Definition at line 563 of file qnumeric.h.

qRound64() [2/2]

qint64 qRound64 ( float f )

inlineconstexpr

Definition at line 568 of file qnumeric.h.

qSubOverflow() [1/4]

template<typename T, T V2>

bool qSubOverflow ( T v1, std::integral_constant< T, V2 > , T * r )

constexpr

Since

6.1

Equivalent to qSubOverflow(v1, v2, r) with v1 as first argument, the compile time constant V2 as second argument, and r as third argument.

Definition at line 410 of file qnumeric.h.

qSubOverflow() [2/4]

template<auto V2, typename T>

bool qSubOverflow ( T v1, T * r )

constexpr

Since

6.1

Equivalent to qSubOverflow(v1, v2, r) with v1 as first argument, the compile time constant V2 as second argument, and r as third argument.

Definition at line 415 of file qnumeric.h.

qSubOverflow() [3/4]

template<typename T>

std::enable_if_t< std::is_unsigned_v< T >, bool > qSubOverflow ( T v1, T v2, T * r )

inlineconstexpr

Definition at line 321 of file qnumeric.h.

qSubOverflow() [4/4]

template<typename T>

std::enable_if_t< std::is_signed_v< T >, bool > qSubOverflow ( T v1, T v2, T * r )

inlineconstexpr

Definition at line 335 of file qnumeric.h.