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| author | Alejandro Colomar <alx.manpages@gmail.com> | 2022-09-05 23:03:38 +0200 |
|---|---|---|
| committer | Alejandro Colomar <alx.manpages@gmail.com> | 2022-09-05 23:03:47 +0200 |
| commit | 70ac1c4785fc1e158ab2349a962dba2526bf4fbc (patch) | |
| tree | bff270e2496dd284bccfc1271b43946f5d225224 /man/man3/lrint.3 | |
| parent | 5423a6f86b2b920a5f3e8cf8d759b513050f2d33 (diff) | |
| download | man-pages-70ac1c4785fc1e158ab2349a962dba2526bf4fbc.tar.gz | |
src.mk, All pages: Move man* to man/
The root of the repository is becoming a bit overpopulated and
unorganized, due to the recent addition of more mandirs, and more
informative and configuration files too. Let's create a specific
mandir <man/> that contains the mandirs <man[1-8]*>.
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Diffstat (limited to 'man/man3/lrint.3')
| -rw-r--r-- | man/man3/lrint.3 | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/man/man3/lrint.3 b/man/man3/lrint.3 new file mode 100644 index 0000000000..240e16db85 --- /dev/null +++ b/man/man3/lrint.3 @@ -0,0 +1,111 @@ +.\" 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 LRINT 3 2021-03-22 "Linux man-pages (unreleased)" +.SH NAME +lrint, lrintf, lrintl, llrint, llrintf, llrintl \- round to nearest integer +.SH LIBRARY +Math library +.RI ( libm ", " \-lm ) +.SH SYNOPSIS +.nf +.B #include <math.h> +.PP +.BI "long lrint(double " x ); +.BI "long lrintf(float " x ); +.BI "long lrintl(long double " x ); +.PP +.BI "long long llrint(double " x ); +.BI "long long llrintf(float " x ); +.BI "long long llrintl(long double " x ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +All functions shown above: +.nf + _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L +.fi +.SH DESCRIPTION +These functions round their argument to the nearest integer value, +using the current rounding direction (see +.BR fesetround (3)). +.PP +Note that unlike the +.BR rint (3) +family of functions, +the return type of these functions differs from +that of their arguments. +.SH RETURN VALUE +These functions return the rounded integer value. +.PP +If +.I x +is a NaN or an infinity, +or the rounded value is too large to be stored in a +.I long +.RI ( "long long" +in the case of the +.B ll* +functions), +then a domain error occurs, and the return value is unspecified. +.\" The return value is -(LONG_MAX - 1) or -(LLONG_MAX -1) +.SH ERRORS +See +.BR math_error (7) +for information on how to determine whether an error has occurred +when calling these functions. +.PP +The following errors can occur: +.TP +Domain error: \fIx\fP is a NaN or infinite, or the rounded value is too large +.\" .I errno +.\" is set to +.\" .BR EDOM . +An invalid floating-point exception +.RB ( FE_INVALID ) +is raised. +.PP +These functions do not set +.IR errno . +.\" FIXME . Is it intentional that these functions do not set errno? +.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6798 +.SH VERSIONS +These functions first appeared in glibc in version 2.1. +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.ad l +.nh +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.BR lrint (), +.BR lrintf (), +.BR lrintl (), +.BR llrint (), +.BR llrintf (), +.BR llrintl () +T} Thread safety MT-Safe +.TE +.hy +.ad +.sp 1 +.SH STANDARDS +C99, POSIX.1-2001, POSIX.1-2008. +.SH SEE ALSO +.BR ceil (3), +.BR floor (3), +.BR lround (3), +.BR nearbyint (3), +.BR rint (3), +.BR round (3) |