undefval.h File Reference

Include dependency graph for undefval.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
class	Values::Undef< T >
	Templatized undefined values. More...
class	Values::Undef< short >
	Undefined od_int16. More...
class	Values::Undef< unsigned short >
	Undefined od_uint16. More...
class	Values::Undef< int >
	Undefined od_int32. More...
class	Values::Undef< unsigned int >
	Undefined od_uint32. More...
class	Values::Undef< int64_t >
	Undefined od_int64. More...
class	Values::Undef< uint64_t >
	Undefined od_uint64. More...
class	Values::Undef< bool >
	Undefined bool. More...
class	Values::Undef< float >
	Undefined float. More...
class	Values::Undef< double >
	Undefined double. More...
class	Values::Undef< const char * >
	Undefined const char*. More...
class	Values::Undef< char * >
	Undefined char*. More...
class	Values::Undef< char >
	Undefined char. More...

Namespaces
	Values
	Templatized undefined and initialisation (i.e. null) values.

Macros
#define	__mUndefDValue   1e30
	Undefined value. IEEE gives NaN but that's not exactly what we want. More...
#define	__mUndefFValue   1e30f
#define	__mIsUndefinedD(x)    (((x)>9.99999e29)&&((x)<1.00001e30))
	Check on undefined. Also works when double converted to float and vv. More...
#define	__mIsUndefinedF(x)    (((x)>9.99999e29f)&&((x)<1.00001e30f))
#define	__mUndefIntVal   2109876543
	Almost MAXINT so unlikely, but not MAXINT to avoid that. More...
#define	__mUndefIntVal64   9223344556677889900LL
	Almost MAXINT64 therefore unlikely. More...
#define	mUdf(type)   Values::Undef<type>::val()
	Use this macro to get the undefined for simple types. More...
#define	mSetUdf(val)   Values::setUdf(val)
	Use this macro to set simple types to undefined. More...
#define	mIsUdf(val)   isUdfImpl(val)
	Use mIsUdf to check for undefinedness of simple types. More...
#define	mFastMaxReasonableFloat   1e20f
#define	mFastIsFloatDefined(fval)

Functions
template<class T >
bool	Values::isUdf (const T &t)
template<class T >
const T &	Values::udfVal (const T &t)
template<class T >
bool	Values::hasUdf ()
template<class T >
T &	Values::setUdf (T &u)
template<class T >
bool	isUdfImpl (T val)
bool	isUdfImpl (float)
bool	isUdfImpl (double)

Macro Definition Documentation

#define __mIsUndefinedD

(

x

)

(((x)>9.99999e29)&&((x)<1.00001e30))

Check on undefined. Also works when double converted to float and vv.

#define __mIsUndefinedF

(

x

)

(((x)>9.99999e29f)&&((x)<1.00001e30f))

#define __mUndefDValue   1e30

Undefined value. IEEE gives NaN but that's not exactly what we want.

#define __mUndefFValue   1e30f

#define __mUndefIntVal   2109876543

Almost MAXINT so unlikely, but not MAXINT to avoid that.

#define __mUndefIntVal64   9223344556677889900LL

Almost MAXINT64 therefore unlikely.

#define mFastIsFloatDefined

(

fval

)

Value:

( (fval>-mFastMaxReasonableFloat && fval<mFastMaxReasonableFloat) || \
      (!__mIsUndefinedF(fval) && Math::IsNormalNumber(fval)) )

#define mFastMaxReasonableFloat   1e20f

Only use this macro if speed really counts, e.g. when doing relatively simple operations on a huge range of data elements in a parallel task. It minimizes slowness from function calls and Math::IsNormalNumber(.). (eventual NaNs in C++ comparisons are said to return always false)

#define mIsUdf

(

val

)

isUdfImpl(val)

Use mIsUdf to check for undefinedness of simple types.

#define mSetUdf

(

val

)

Values::setUdf(val)

Use this macro to set simple types to undefined.

#define mUdf

(

type

)

Values::Undef<type>::val()

Use this macro to get the undefined for simple types.

Function Documentation

template<class T >

bool isUdfImpl ( T  val )

inline

bool isUdfImpl

(

float

)

bool isUdfImpl

(

double

)