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authorbde <bde@FreeBSD.org>2001-10-13 14:22:08 +0000
committerbde <bde@FreeBSD.org>2001-10-13 14:22:08 +0000
commit4784c39e63e0d779fa98850910292bb686a99f29 (patch)
treeaaa10513922196627455990aa96fadc170ffc711 /lib/libm/common_source/rint.3
parent3097d9a80a95cf00bc33d528031adb2abdf8ecd6 (diff)
downloadFreeBSD-src-4784c39e63e0d779fa98850910292bb686a99f29.zip
FreeBSD-src-4784c39e63e0d779fa98850910292bb686a99f29.tar.gz
Removed most of the zombie man pages in libm. All relevant parts have
been copied to msun/man (most of them long ago without proper history).
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diff --git a/lib/libm/common_source/rint.3 b/lib/libm/common_source/rint.3
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-.\" Copyright (c) 1985, 1991, 1993
-.\" The Regents of the University of California. 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.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
-.\"
-.\" @(#)rint.3 8.2 (Berkeley) 12/11/93
-.\" $FreeBSD$
-.\"
-.Dd December 11, 1993
-.Dt RINT 3
-.Os
-.Sh NAME
-.Nm rint
-.Nd round-to-closest integer functions
-.Sh LIBRARY
-.Lb libm
-.Sh SYNOPSIS
-.In math.h
-.Ft double
-.Fn rint "double x"
-.Sh DESCRIPTION
-The
-.Fn rint
-function finds the integer (represented as a double precision number)
-nearest to
-.Fa x
-in the direction of the prevailing rounding mode.
-.Sh NOTES
-On a
-.Tn VAX ,
-.Fn rint x
-is equivalent to adding half to the magnitude
-and then rounding towards zero.
-.Pp
-In the default rounding mode, to nearest,
-on a machine that conforms to
-.Tn IEEE
-754,
-.Fn rint x
-is the integer nearest
-.Fa x
-with the additional stipulation
-that if
-.Li |rint(x)\-x|=1/2
-then
-.Fn rint x
-is even.
-Other rounding modes can make
-.Fn rint
-act like
-.Fn floor ,
-or like
-.Fn ceil ,
-or round towards zero.
-.Pp
-Another way to obtain an integer near
-.Fa x
-is to declare (in C)
-.Bd -literal -offset indent
-double x;\0\0\0\0 int k;\0\0\0\0k\0=\0x;
-.Ed
-.Pp
-Most C compilers round
-.Fa x
-towards 0 to get the integer
-.Fa k ,
-but
-some do otherwise.
-If in doubt, use
-.Fn floor ,
-.Fn ceil ,
-or
-.Fn rint
-first, whichever you intend.
-Also note that, if x is larger than
-.Fa k
-can accommodate, the value of
-.Fa k
-and the presence or absence of an integer overflow are hard to
-predict.
-.Sh SEE ALSO
-.Xr abs 3 ,
-.Xr ceil 3 ,
-.Xr fabs 3 ,
-.Xr floor 3 ,
-.Xr ieee 3 ,
-.Xr math 3
-.Sh HISTORY
-A
-.Fn rint
-function appeared in
-.At v6 .
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