Name
nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl — floating point number manipulation
Synopsis
#include <math.h>
double nextafter( |
double | x, |
| double | y); |
float
nextafterf( |
float | x, |
| float | y); |
long
double nextafterl( |
long double | x, |
| long double | y); |
double nexttoward( |
double | x, |
| long double | y); |
float
nexttowardf( |
float | x, |
| long double | y); |
long
double nexttowardl( |
long double | x, |
| long double | y); |
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DESCRIPTION
The nextafter() functions
return the next representable neighbor of x in the direction towards
y. The size of the
step between x and
the result depends on the type of the result. If x = y the function simply returns
y. If either value is
NaN, then NaN is returned. Otherwise a value
corresponding to the value of the least significant bit in
the mantissa is added or subtracted, depending on the
direction.
The nexttoward() functions
do the same as the nextafter()
functions, except that they have a long
double second argument.
These functions will signal overflow or underflow if the result goes outside of the range of normalized numbers.
CONFORMING TO
C99. This function is defined in IEC 559 (and the appendix with recommended functions in IEEE 754/IEEE 854).
COLOPHON
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
|
Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de) Distributed under GPL Based on glibc infopages |