Functions
rtl::OString	doubleToString (double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, char cDecSeparator, sal_Int32 const *pGroups, char cGroupSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToString. More...

rtl::OString	doubleToString (double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, char cDecSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToString, with no grouping. More...

void	doubleToStringBuffer (rtl::OStringBuffer &rBuffer, double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, char cDecSeparator, sal_Int32 const *pGroups, char cGroupSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToString that appends to an rtl::OStringBuffer. More...

void	doubleToStringBuffer (rtl::OStringBuffer &rBuffer, double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, char cDecSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToString that appends to an rtl::OStringBuffer, with no grouping. More...

rtl::OUString	doubleToUString (double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, sal_Unicode cDecSeparator, sal_Int32 const *pGroups, sal_Unicode cGroupSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToUString. More...

rtl::OUString	doubleToUString (double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, sal_Unicode cDecSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToUString, with no grouping. More...

void	doubleToUStringBuffer (rtl::OUStringBuffer &rBuffer, double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, sal_Unicode cDecSeparator, sal_Int32 const *pGroups, sal_Unicode cGroupSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToUString that appends to an rtl::OUStringBuffer. More...

void	doubleToUStringBuffer (rtl::OUStringBuffer &rBuffer, double fValue, rtl_math_StringFormat eFormat, sal_Int32 nDecPlaces, sal_Unicode cDecSeparator, bool bEraseTrailingDecZeros=false)
	A wrapper around rtl_math_doubleToUString that appends to an rtl::OUStringBuffer, with no grouping. More...

double	stringToDouble (rtl::OString const &rString, char cDecSeparator, char cGroupSeparator, rtl_math_ConversionStatus pStatus=NULL, sal_Int32 pParsedEnd=NULL)
	A wrapper around rtl_math_stringToDouble. More...

double	stringToDouble (rtl::OUString const &rString, sal_Unicode cDecSeparator, sal_Unicode cGroupSeparator, rtl_math_ConversionStatus pStatus=NULL, sal_Int32 pParsedEnd=NULL)
	A wrapper around rtl_math_uStringToDouble. More...

double	round (double fValue, int nDecPlaces=0, rtl_math_RoundingMode eMode=rtl_math_RoundingMode_Corrected)
	A wrapper around rtl_math_round. More...

double	pow10Exp (double fValue, int nExp)
	A wrapper around rtl_math_pow10Exp. More...

double	approxValue (double fValue)
	A wrapper around rtl_math_approxValue. More...

double	expm1 (double fValue)
	A wrapper around rtl_math_expm1. More...

double	log1p (double fValue)
	A wrapper around rtl_math_log1p. More...

double	atanh (double fValue)
	A wrapper around rtl_math_atanh. More...

double	erf (double fValue)
	A wrapper around rtl_math_erf. More...

double	erfc (double fValue)
	A wrapper around rtl_math_erfc. More...

double	asinh (double fValue)
	A wrapper around rtl_math_asinh. More...

double	acosh (double fValue)
	A wrapper around rtl_math_acosh. More...

bool	approxEqual (double a, double b)
	A wrapper around rtl_math_approxEqual. More...

bool	approxEqual (double a, double b, sal_Int16 nPrec)
	Test equality of two values with an accuracy defined by nPrec. More...

double	approxAdd (double a, double b)
	Add two values. More...

double	approxSub (double a, double b)
	Subtract two values (a-b). More...

double	approxFloor (double a)
	floor() method taking approxValue() into account. More...

double	approxCeil (double a)
	ceil() method taking approxValue() into account. More...

bool	isFinite (double d)
	Tests whether a value is neither INF nor NAN. More...

bool	isInf (double d)
	If a value represents +INF or -INF. More...

bool	isNan (double d)
	Test on any QNAN or SNAN. More...

bool	isSignBitSet (double d)
	If the sign bit is set. More...

void	setInf (double *pd, bool bNegative)
	Set to +INF if bNegative==false or -INF if bNegative==true. More...

void	setNan (double *pd)
	Set a QNAN. More...

bool	isValidArcArg (double d)
	If a value is a valid argument for sin(), cos(), tan(). More...

double	sin (double d)
	Safe sin(), returns NAN if not valid. More...

double	cos (double d)
	Safe cos(), returns NAN if not valid. More...

double	tan (double d)
	Safe tan(), returns NAN if not valid. More...

Function Documentation

◆ acosh()

double rtl::math::acosh ( double fValue )

inline

A wrapper around rtl_math_acosh.

◆ approxAdd()

double rtl::math::approxAdd	(	double	a,
		double	b
	)

inline

Add two values.

If signs differ and the absolute values are equal according to approxEqual() the method returns 0.0 instead of calculating the sum.

If you wanted to sum up multiple values it would be convenient not to call approxAdd() for each value but instead remember the first value not equal to 0.0, add all other values using normal + operator, and with the result and the remembered value call approxAdd().

◆ approxCeil()

double rtl::math::approxCeil ( double a )

inline

ceil() method taking approxValue() into account.

Use for expected integer values being calculated by double functions.

◆ approxEqual() [1/2]

bool rtl::math::approxEqual	(	double	a,
		double	b
	)

inline

A wrapper around rtl_math_approxEqual.

◆ approxEqual() [2/2]

bool rtl::math::approxEqual	(	double	a,
		double	b,
		sal_Int16	nPrec
	)

inline

Test equality of two values with an accuracy defined by nPrec.

Attention: approxEqual( value!=0.0, 0.0 ) never yields true.

◆ approxFloor()

double rtl::math::approxFloor ( double a )

inline

floor() method taking approxValue() into account.

Use for expected integer values being calculated by double functions.

◆ approxSub()

double rtl::math::approxSub	(	double	a,
		double	b
	)

inline

Subtract two values (a-b).

If signs are identical and the values are equal according to approxEqual() the method returns 0.0 instead of calculating the subtraction.

◆ approxValue()

double rtl::math::approxValue ( double fValue )

inline

A wrapper around rtl_math_approxValue.

◆ asinh()

double rtl::math::asinh ( double fValue )

inline

A wrapper around rtl_math_asinh.

◆ atanh()

double rtl::math::atanh ( double fValue )

inline

A wrapper around rtl_math_atanh.

◆ cos()

double rtl::math::cos ( double d )

inline

Safe cos(), returns NAN if not valid.

◆ doubleToString() [1/2]

rtl::OString rtl::math::doubleToString	(	double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		char	cDecSeparator,
		sal_Int32 const *	pGroups,
		char	cGroupSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToString.

◆ doubleToString() [2/2]

rtl::OString rtl::math::doubleToString	(	double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		char	cDecSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToString, with no grouping.

◆ doubleToStringBuffer() [1/2]

void rtl::math::doubleToStringBuffer	(	rtl::OStringBuffer &	rBuffer,
		double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		char	cDecSeparator,
		sal_Int32 const *	pGroups,
		char	cGroupSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToString that appends to an rtl::OStringBuffer.

Since: LibreOffice 5.4

◆ doubleToStringBuffer() [2/2]

void rtl::math::doubleToStringBuffer	(	rtl::OStringBuffer &	rBuffer,
		double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		char	cDecSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToString that appends to an rtl::OStringBuffer, with no grouping.

Since: LibreOffice 5.4

◆ doubleToUString() [1/2]

rtl::OUString rtl::math::doubleToUString	(	double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		sal_Unicode	cDecSeparator,
		sal_Int32 const *	pGroups,
		sal_Unicode	cGroupSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToUString.

◆ doubleToUString() [2/2]

rtl::OUString rtl::math::doubleToUString	(	double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		sal_Unicode	cDecSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToUString, with no grouping.

◆ doubleToUStringBuffer() [1/2]

void rtl::math::doubleToUStringBuffer	(	rtl::OUStringBuffer &	rBuffer,
		double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		sal_Unicode	cDecSeparator,
		sal_Int32 const *	pGroups,
		sal_Unicode	cGroupSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToUString that appends to an rtl::OUStringBuffer.

◆ doubleToUStringBuffer() [2/2]

void rtl::math::doubleToUStringBuffer	(	rtl::OUStringBuffer &	rBuffer,
		double	fValue,
		rtl_math_StringFormat	eFormat,
		sal_Int32	nDecPlaces,
		sal_Unicode	cDecSeparator,
		bool	bEraseTrailingDecZeros = `false`
	)

inline

A wrapper around rtl_math_doubleToUString that appends to an rtl::OUStringBuffer, with no grouping.

◆ erf()

double rtl::math::erf ( double fValue )

inline

A wrapper around rtl_math_erf.

◆ erfc()

double rtl::math::erfc ( double fValue )

inline

A wrapper around rtl_math_erfc.

◆ expm1()

double rtl::math::expm1 ( double fValue )

inline

A wrapper around rtl_math_expm1.

◆ isFinite()

bool rtl::math::isFinite ( double d )

inline

Tests whether a value is neither INF nor NAN.

◆ isInf()

bool rtl::math::isInf ( double d )

inline

If a value represents +INF or -INF.

The sign bit may be queried with isSignBitSet().

If isFinite(d)==false and isInf(d)==false then NAN.

◆ isNan()

bool rtl::math::isNan ( double d )

inline

Test on any QNAN or SNAN.

◆ isSignBitSet()

bool rtl::math::isSignBitSet ( double d )

inline

If the sign bit is set.

◆ isValidArcArg()

bool rtl::math::isValidArcArg ( double d )

inline

If a value is a valid argument for sin(), cos(), tan().

IEEE 754 specifies that absolute values up to 2^64 (=1.844e19) for the radian must be supported by trigonometric functions. Unfortunately, at least on x86 architectures, the FPU doesn't generate an error pattern for values >2^64 but produces erroneous results instead and sets only the "invalid operation" (IM) flag in the status word :-( Thus the application has to handle it itself.

◆ log1p()

double rtl::math::log1p ( double fValue )

inline

A wrapper around rtl_math_log1p.

◆ pow10Exp()

double rtl::math::pow10Exp	(	double	fValue,
		int	nExp
	)

inline

A wrapper around rtl_math_pow10Exp.

◆ round()

double rtl::math::round	(	double	fValue,
		int	nDecPlaces = `0`,
		rtl_math_RoundingMode	eMode = `rtl_math_RoundingMode_Corrected`
	)

inline

A wrapper around rtl_math_round.

◆ setInf()

void rtl::math::setInf	(	double *	pd,
		bool	bNegative
	)

inline

Set to +INF if bNegative==false or -INF if bNegative==true.

◆ setNan()

void rtl::math::setNan ( double * pd )

inline

Set a QNAN.

◆ sin()

double rtl::math::sin ( double d )

inline

Safe sin(), returns NAN if not valid.

◆ stringToDouble() [1/2]

double rtl::math::stringToDouble	(	rtl::OString const &	rString,
		char	cDecSeparator,
		char	cGroupSeparator,
		rtl_math_ConversionStatus *	pStatus = `NULL`,
		sal_Int32 *	pParsedEnd = `NULL`
	)

inline

A wrapper around rtl_math_stringToDouble.

◆ stringToDouble() [2/2]

double rtl::math::stringToDouble	(	rtl::OUString const &	rString,
		sal_Unicode	cDecSeparator,
		sal_Unicode	cGroupSeparator,
		rtl_math_ConversionStatus *	pStatus = `NULL`,
		sal_Int32 *	pParsedEnd = `NULL`
	)

inline

A wrapper around rtl_math_uStringToDouble.

◆ tan()

double rtl::math::tan ( double d )

inline

Safe tan(), returns NAN if not valid.

Functions

Function Documentation

◆ acosh()

◆ approxAdd()

◆ approxCeil()

◆ approxEqual() [1/2]

◆ approxEqual() [2/2]

◆ approxFloor()

◆ approxSub()

◆ approxValue()

◆ asinh()

◆ atanh()

◆ cos()

◆ doubleToString() [1/2]

◆ doubleToString() [2/2]

◆ doubleToStringBuffer() [1/2]

◆ doubleToStringBuffer() [2/2]

◆ doubleToUString() [1/2]

◆ doubleToUString() [2/2]

◆ doubleToUStringBuffer() [1/2]

◆ doubleToUStringBuffer() [2/2]

◆ erf()

◆ erfc()

◆ expm1()

◆ isFinite()

◆ isInf()

◆ isNan()

◆ isSignBitSet()

◆ isValidArcArg()

◆ log1p()

◆ pow10Exp()

◆ round()

◆ setInf()

◆ setNan()

◆ sin()

◆ stringToDouble() [1/2]

◆ stringToDouble() [2/2]

◆ tan()