diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man3/lrint.3 | |
parent | Initial commit. (diff) | |
download | manpages-399644e47874bff147afb19c89228901ac39340e.tar.xz manpages-399644e47874bff147afb19c89228901ac39340e.zip |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/lrint.3')
-rw-r--r-- | man3/lrint.3 | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/man3/lrint.3 b/man3/lrint.3 new file mode 100644 index 0000000..66f8598 --- /dev/null +++ b/man3/lrint.3 @@ -0,0 +1,111 @@ +'\" 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 lrint 3 2023-07-20 "Linux man-pages 6.05.01" +.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: https://www.sourceware.org/bugzilla/show_bug.cgi?id=6798 +.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 lrint (), +.BR lrintf (), +.BR lrintl (), +.BR llrint (), +.BR llrintf (), +.BR llrintl () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +C11, POSIX.1-2008. +.SH HISTORY +glibc 2.1. +C99, POSIX.1-2001. +.SH SEE ALSO +.BR ceil (3), +.BR floor (3), +.BR lround (3), +.BR nearbyint (3), +.BR rint (3), +.BR round (3) |