81 lines
2.2 KiB
Groff
81 lines
2.2 KiB
Groff
.\" Copyright (c) 2004, 2005 David Schultz <das@FreeBSD.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 16, 2005
|
|
.Dt TRUNC 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm trunc ,
|
|
.Nm truncf ,
|
|
.Nm truncl
|
|
.Nd nearest integral value with magnitude less than or equal to |x|
|
|
.Sh LIBRARY
|
|
.Lb libm
|
|
.Sh SYNOPSIS
|
|
.In math.h
|
|
.Ft double
|
|
.Fn trunc "double x"
|
|
.Ft float
|
|
.Fn truncf "float x"
|
|
.Ft "long double"
|
|
.Fn truncl "long double x"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn trunc ,
|
|
.Fn truncf ,
|
|
and
|
|
.Fn truncl
|
|
functions return the nearest integral value with magnitude less than
|
|
or equal to
|
|
.Pf | Fa x Ns | .
|
|
They are equivalent to
|
|
.Fn rint ,
|
|
.Fn rintf ,
|
|
and
|
|
.Fn rintl ,
|
|
respectively, in the
|
|
.Dv FE_TOWARDZERO
|
|
rounding mode.
|
|
.Sh SEE ALSO
|
|
.Xr ceil 3 ,
|
|
.Xr fesetround 3 ,
|
|
.Xr floor 3 ,
|
|
.Xr math 3 ,
|
|
.Xr nextafter 3 ,
|
|
.Xr rint 3 ,
|
|
.Xr round 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn trunc ,
|
|
.Fn truncf ,
|
|
and
|
|
.Fn truncl
|
|
functions conform to
|
|
.St -isoC-99 .
|
|
.Sh HISTORY
|
|
These routines first appeared in
|
|
.Fx 5.3 .
|