Subversion Repositories Kolibri OS

/*

FUNCTION

	<>, <>, <>, <>, <>, <>---test for exceptional numbers

INDEX

	isnan

INDEX

	isinf

INDEX

	finite

INDEX

	isnanf

INDEX

	isinff

INDEX

	finitef

ANSI_SYNOPSIS

	#include 

	int isnan(double <[arg]>);

	int isinf(double <[arg]>);

	int finite(double <[arg]>);

	int isnanf(float <[arg]>);

	int isinff(float <[arg]>);

	int finitef(float <[arg]>);

TRAD_SYNOPSIS

	#include 

	int isnan(<[arg]>)

	double <[arg]>;

	int isinf(<[arg]>)

	double <[arg]>;

	int finite(<[arg]>);

	double <[arg]>;

	int isnanf(<[arg]>);

	float <[arg]>;

	int isinff(<[arg]>);

	float <[arg]>;

	int finitef(<[arg]>);

	float <[arg]>;

DESCRIPTION

	These functions provide information on the floating-point

	argument supplied.

	There are five major number formats:

	o+

	o zero

	  A number which contains all zero bits.

	o subnormal

	  A number with a zero exponent but a nonzero fraction.

	o normal

	  A number with an exponent and a fraction.

     	o infinity

	  A number with an all 1's exponent and a zero fraction.

	o NAN

	  A number with an all 1's exponent and a nonzero fraction.

	o-

	<> returns 1 if the argument is a nan. <>

	returns 1 if the argument is infinity.  <> returns 1 if the

	argument is zero, subnormal or normal.

	Note that by the C99 standard, <> and <> are macros

	taking any type of floating-point and are declared in

	<>.  Newlib has chosen to declare these as macros in

	<> and as functions in <>.

	The <>, <> and <> functions perform the same

	operations as their <>, <> and <>

	counterparts, but on single-precision floating-point numbers.

QUICKREF

	isnan - pure

QUICKREF

	isinf - pure

QUICKREF

	finite - pure

QUICKREF

	isnan - pure

QUICKREF

	isinf - pure

QUICKREF

	finite - pure

 */