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-'\" t
-.\" Copyright 2001 Andries Brouwer <aeb@cwi.nl>.
-.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
-.\"     <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH rint 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-nearbyint, nearbyintf, nearbyintl, rint, rintf, rintl \- round
-to nearest integer
-.SH LIBRARY
-Math library
-.RI ( libm ", " \-lm )
-.SH SYNOPSIS
-.nf
-.B #include <math.h>
-.P
-.BI "double nearbyint(double " x );
-.BI "float nearbyintf(float " x );
-.BI "long double nearbyintl(long double " x );
-.P
-.BI "double rint(double " x );
-.BI "float rintf(float " x );
-.BI "long double rintl(long double " x );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR nearbyint (),
-.BR nearbyintf (),
-.BR nearbyintl ():
-.nf
-    _POSIX_C_SOURCE >= 200112L || _ISOC99_SOURCE
-.fi
-.P
-.BR rint ():
-.nf
-    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
-        || _XOPEN_SOURCE >= 500
-.\"    || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
-        || /* Since glibc 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.P
-.BR rintf (),
-.BR rintl ():
-.nf
-    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
-        || /* Since glibc 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.SH DESCRIPTION
-The
-.BR nearbyint (),
-.BR nearbyintf (),
-and
-.BR nearbyintl ()
-functions round their argument to an integer value in floating-point
-format, using the current rounding direction (see
-.BR fesetround (3))
-and without raising the
-.I inexact
-exception.
-When the current rounding direction is to nearest, these
-functions round halfway cases to the even integer in accordance with
-IEEE-754.
-.P
-The
-.BR rint (),
-.BR rintf (),
-and
-.BR rintl ()
-functions do the same, but will raise the
-.I inexact
-exception
-.RB ( FE_INEXACT ,
-checkable via
-.BR fetestexcept (3))
-when the result differs in value from the argument.
-.SH RETURN VALUE
-These functions return the rounded integer value.
-.P
-If
-.I x
-is integral, +0, \-0, NaN, or infinite,
-.I x
-itself is returned.
-.SH ERRORS
-No errors occur.
-POSIX.1-2001 documents a range error for overflows, but see NOTES.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.na
-.nh
-.BR nearbyint (),
-.BR nearbyintf (),
-.BR nearbyintl (),
-.BR rint (),
-.BR rintf (),
-.BR rintl ()
-T}	Thread safety	MT-Safe
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-C99, POSIX.1-2001.
-.SH NOTES
-SUSv2 and POSIX.1-2001 contain text about overflow (which might set
-.I errno
-to
-.BR ERANGE ,
-or raise an
-.B FE_OVERFLOW
-exception).
-In practice, the result cannot overflow on any current machine,
-so this error-handling stuff is just nonsense.
-(More precisely, overflow can happen only when the maximum value
-of the exponent is smaller than the number of mantissa bits.
-For the IEEE-754 standard 32-bit and 64-bit floating-point numbers
-the maximum value of the exponent is 127 (respectively, 1023),
-and the number of mantissa bits
-including the implicit bit
-is 24 (respectively, 53).)
-.P
-If you want to store the rounded value in an integer type,
-you probably want to use one of the functions described in
-.BR lrint (3)
-instead.
-.SH SEE ALSO
-.BR ceil (3),
-.BR floor (3),
-.BR lrint (3),
-.BR round (3),
-.BR trunc (3)