qnan.h File Reference

Some utilities for our dealings with qnans. More...

Classes
union	_IEEEDouble
	Data structure to represent the bit pattern of a 64 Bit IEEE 754 floating-point number. More...
union	_IEEESingle
	Data structure to represent the bit pattern of a 32 Bit IEEE 754 floating-point number. More...

Macros
#define	AI_QNAN_H_INCLUDED

Functions
AI_FORCE_INLINE ai_real	get_qnan ()
	Get a fresh qnan. More...
template<class TReal >
AI_FORCE_INLINE bool	is_not_qnan (TReal in)
	Check whether a float is NOT qNaN. More...
AI_FORCE_INLINE bool	is_qnan (double in)
	Check whether a given double is qNaN. More...
AI_FORCE_INLINE bool	is_qnan (float in)
	Check whether a given float is qNaN. More...
AI_FORCE_INLINE bool	is_special_float (double in)
	check whether a double is either NaN or (+/-) INF. More...
AI_FORCE_INLINE bool	is_special_float (float in)
	check whether a float is either NaN or (+/-) INF. More...

Detailed Description

Some utilities for our dealings with qnans.

Note

Some loaders use qnans to mark invalid values tempoarily, also Assimp explicitly enforces undefined normals to be set to qnan. qnan utilities are available in standard libraries (C99 for example) but last time I checked compiler coverage was so bad that I decided to reinvent the wheel.

Macro Definition Documentation

AI_QNAN_H_INCLUDED

#define AI_QNAN_H_INCLUDED

Function Documentation

get_qnan()

AI_FORCE_INLINE ai_real get_qnan

(

)

Get a fresh qnan.

is_not_qnan()

template<class TReal >

AI_FORCE_INLINE bool is_not_qnan

(

TReal

in

)

Check whether a float is NOT qNaN.

Parameters

in	Input value

is_qnan() [1/2]

AI_FORCE_INLINE bool is_qnan

(

double

in

)

Check whether a given double is qNaN.

Parameters

in	Input value

is_qnan() [2/2]

AI_FORCE_INLINE bool is_qnan

(

float

in

)

Check whether a given float is qNaN.

Parameters

in	Input value

is_special_float() [1/2]

AI_FORCE_INLINE bool is_special_float

(

double

in

)

check whether a double is either NaN or (+/-) INF.

Denorms return false, they're treated like normal values.

Parameters

in	Input value

is_special_float() [2/2]

AI_FORCE_INLINE bool is_special_float

(

float

in

)

check whether a float is either NaN or (+/-) INF.

Denorms return false, they're treated like normal values.

Parameters

in	Input value