Copyright (c) 2005 David Schultz <das (at] FreeBSD.org>
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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$FreeBSD: src/lib/msun/man/lround.3,v 1.4 2005/06/15 19:04:04 ru Exp $
.Dd April 7, 2005 .Dt LROUND 3 .Os .Sh NAME .Nm llround , .Nm llroundf , .Nm llroundl , .Nm lround , .Nm lroundf , .Nm lroundl .Nd "convert to nearest integral value" .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft "long long" .Fn llround "double x" .Ft "long long" .Fn llroundf "float x" .Ft "long long" .Fn llroundl "long double x" .Ft long .Fn lround "double x" .Ft long .Fn lroundf "float x" .Ft long .Fn lroundl "long double x" .Sh DESCRIPTION The .Fn lround function returns the integer nearest to its argument .Fa x , rounding away from zero in halfway cases. If the rounded result is too large to be represented as a .Vt long value, an invalid exception is raised and the return value is undefined. Otherwise, if .Fa x is not an integer, .Fn lround may raise an inexact exception. When the rounded result is representable as a .Vt long , the expression .Fn lround x is equivalent to
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: src/lib/msun/man/lround.3,v 1.4 2005/06/15 19:04:04 ru Exp $
.Dd April 7, 2005 .Dt LROUND 3 .Os .Sh NAME .Nm llround , .Nm llroundf , .Nm llroundl , .Nm lround , .Nm lroundf , .Nm lroundl .Nd "convert to nearest integral value" .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft "long long" .Fn llround "double x" .Ft "long long" .Fn llroundf "float x" .Ft "long long" .Fn llroundl "long double x" .Ft long .Fn lround "double x" .Ft long .Fn lroundf "float x" .Ft long .Fn lroundl "long double x" .Sh DESCRIPTION The .Fn lround function returns the integer nearest to its argument .Fa x , rounding away from zero in halfway cases. If the rounded result is too large to be represented as a .Vt long value, an invalid exception is raised and the return value is undefined. Otherwise, if .Fa x is not an integer, .Fn lround may raise an inexact exception. When the rounded result is representable as a .Vt long , the expression .Fn lround x is equivalent to
o Vt long Pc Ns Fn round x (although the former may be more efficient).
p The .Fn llround , .Fn llroundf , .Fn llroundl , .Fn lroundf and .Fn lroundl functions differ from .Fn lround only in their input and output types. .Sh SEE ALSO .Xr lrint 3 , .Xr math 3 , .Xr rint 3 , .Xr round 3 .Sh STANDARDS The .Fn llround , .Fn llroundf , .Fn llroundl , .Fn lround , .Fn lroundf , and .Fn lroundl functions conform to .St -isoC-99 . .Sh HISTORY The .Vt float and .Vt double versions of these routines first appeared in .Fx 5.4 . The .Vt "long double" versions appeared in .Fx 6.0 .
