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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:22 +0000 |
commit | 3d08cd331c1adcf0d917392f7e527b3f00511748 (patch) | |
tree | 312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man3/round.3 | |
parent | Adding debian version 6.7-2. (diff) | |
download | manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip |
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/round.3')
-rw-r--r-- | man3/round.3 | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/man3/round.3 b/man3/round.3 deleted file mode 100644 index 4e27fd6..0000000 --- a/man3/round.3 +++ /dev/null @@ -1,110 +0,0 @@ -'\" 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 round 3 2023-10-31 "Linux man-pages 6.7" -.SH NAME -round, roundf, roundl \- round to nearest integer, away from zero -.SH LIBRARY -Math library -.RI ( libm ", " \-lm ) -.SH SYNOPSIS -.nf -.B #include <math.h> -.P -.BI "double round(double " x ); -.BI "float roundf(float " x ); -.BI "long double roundl(long double " x ); -.fi -.P -.RS -4 -Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): -.RE -.P -.BR round (), -.BR roundf (), -.BR roundl (): -.nf - _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L -.fi -.SH DESCRIPTION -These functions round -.I x -to the nearest integer, but -round halfway cases away from zero (regardless of the current rounding -direction, see -.BR fenv (3)), -instead of to the nearest even integer like -.BR rint (3). -.P -For example, -.I round(0.5) -is 1.0, and -.I round(\-0.5) -is \-1.0. -.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 round (), -.BR roundf (), -.BR roundl () -T} Thread safety MT-Safe -.TE -.SH STANDARDS -C11, POSIX.1-2008. -.SH HISTORY -glibc 2.1. -C99, POSIX.1-2001. -.SH NOTES -POSIX.1-2001 contains 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. -.\" The POSIX.1-2001 APPLICATION USAGE SECTION discusses this point. -(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 lround (3) -instead. -.SH SEE ALSO -.BR ceil (3), -.BR floor (3), -.BR lround (3), -.BR nearbyint (3), -.BR rint (3), -.BR trunc (3) |