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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man3/trunc.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/trunc.3')
-rw-r--r-- | man3/trunc.3 | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/man3/trunc.3 b/man3/trunc.3 new file mode 100644 index 0000000..4670f03 --- /dev/null +++ b/man3/trunc.3 @@ -0,0 +1,84 @@ +'\" t +.\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>. +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH trunc 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +trunc, truncf, truncl \- round to integer, toward zero +.SH LIBRARY +Math library +.RI ( libm ", " \-lm ) +.SH SYNOPSIS +.nf +.B #include <math.h> +.PP +.BI "double trunc(double " x ); +.BI "float truncf(float " x ); +.BI "long double truncl(long double " x ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR trunc (), +.BR truncf (), +.BR truncl (): +.nf + _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L +.fi +.SH DESCRIPTION +These functions round +.I x +to the nearest integer value that is not larger in magnitude than +.IR x . +.SH RETURN VALUE +These functions return the rounded integer value, in floating format. +.PP +If +.I x +is integral, infinite, or NaN, +.I x +itself is returned. +.SH ERRORS +No errors occur. +.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 trunc (), +.BR truncf (), +.BR truncl () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +C11, POSIX.1-2008. +.SH HISTORY +glibc 2.1. +C99, POSIX.1-2001. +.SH NOTES +The integral value returned by these functions may be too large +to store in an integer type +.RI ( int , +.IR long , +etc.). +To avoid an overflow, which will produce undefined results, +an application should perform a range check on the returned value +before assigning it to an integer type. +.SH SEE ALSO +.BR ceil (3), +.BR floor (3), +.BR lrint (3), +.BR nearbyint (3), +.BR rint (3), +.BR round (3) |