ASN1C C/C++ Common Runtime  ASN1C v7.8.x
Functions
Floating-point number utility functions

Functions

OSREAL rtxGetMinusInfinity (OSVOIDARG)
 
OSREAL rtxGetMinusZero (OSVOIDARG)
 
OSREAL rtxGetNaN (OSVOIDARG)
 
OSREAL rtxGetPlusInfinity (OSVOIDARG)
 
OSBOOL rtxIsMinusInfinity (OSREAL value)
 
OSBOOL rtxIsMinusZero (OSREAL value)
 
OSBOOL rtxIsNaN (OSREAL value)
 
OSBOOL rtxIsPlusInfinity (OSREAL value)
 
OSBOOL rtxIsApproximate (OSREAL a, OSREAL b, OSREAL delta)
 
OSBOOL rtxIsApproximateAbs (OSREAL a, OSREAL b, OSREAL delta)
 

Detailed Description

Floating-point utility function provide run-time functions for handling floating-point number types defined within a schema.

Function Documentation

◆ rtxGetMinusInfinity()

OSREAL rtxGetMinusInfinity ( OSVOIDARG  )

Returns the IEEE negative infinity value. This is defined as 0xfff0000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.

◆ rtxGetMinusZero()

OSREAL rtxGetMinusZero ( OSVOIDARG  )

Returns the IEEE minus zero value. This is defined as 0x8000000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.

◆ rtxGetNaN()

OSREAL rtxGetNaN ( OSVOIDARG  )

Returns the IEEE Not-A-Number (NaN) value. This is defined as 0x7ff8000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.

◆ rtxGetPlusInfinity()

OSREAL rtxGetPlusInfinity ( OSVOIDARG  )

Returns the IEEE posative infinity value. This is defined as 0x7ff0000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.

◆ rtxIsApproximate()

OSBOOL rtxIsApproximate ( OSREAL  a,
OSREAL  b,
OSREAL  delta 
)

A utility function that return TRUE when first number are approximate to second number with given precision.

Parameters
aThe input real value.
bThe input real value.
deltadifference must be low than delta * a 1E-7 - set best precision for float; 1E-15 - set best precision for double.

◆ rtxIsApproximateAbs()

OSBOOL rtxIsApproximateAbs ( OSREAL  a,
OSREAL  b,
OSREAL  delta 
)

A utility function that return TRUE when first number are approximate to second number with given absolute precision.

Parameters
aThe input real value.
bThe input real value.
deltadifference must be low than delta

◆ rtxIsMinusInfinity()

OSBOOL rtxIsMinusInfinity ( OSREAL  value)

A utility function that compares the given input value to the IEEE 754 value for negative infinity.

Parameters
valueThe input real value.

◆ rtxIsMinusZero()

OSBOOL rtxIsMinusZero ( OSREAL  value)

A utility function that compares the given input value to the IEEE 754 value for minus zero.

Parameters
valueThe input real value.

◆ rtxIsNaN()

OSBOOL rtxIsNaN ( OSREAL  value)

A utility function that compares the given input value to the IEEE 754 value for Not-A-Number (NaN).

Parameters
valueThe input real value.

◆ rtxIsPlusInfinity()

OSBOOL rtxIsPlusInfinity ( OSREAL  value)

A utility function that compares the given input value to the IEEE 754 value for positive infinity.

Parameters
valueThe input real value.