.\" Copyright (c) 1991 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. .\" .\" from: @(#)fmod.3 5.1 (Berkeley) 5/2/91 .\" $Id: remquo.3,v 1.4 2004/12/20 21:35:46 scp Exp $ .\" .Dd December 11, 2006 .Dt REMQUO 3 .Os .Sh NAME .Nm remquo .Nd floating-point remainder and quotient function .Sh SYNOPSIS .Fd #include <math.h> .Ft double .Fn remquo "double x" "double y" "int *quo" .Ft long double .Fn remquol "long double x" "long double y" "int *quo" .Ft float .Fn remquof "float x" "float y" "int *quo" .Sh DESCRIPTION The .Fn remquo functions compute the value r such that r = x - n*y, where n is the integer nearest the exact value of x/y. .Pp If there are two integers closest to x/y, n shall be the even one. If r is zero, it is given the same sign as x. This is the same value that is returned by the .Fn remainder function. .Fn remquo also calculates the lower seven bits of the integral quotient x/y, and gives that value the same sign as x/y. It stores this signed value in the object pointed to by quo. .Sh SPECIAL VALUES .Fn remquo "x, y, quo" returns a NaN and raises the "invalid" floating-point exception if x is infinite or y is 0. .Sh SEE ALSO .Xr math 3 , .Xr remainder 3 .Sh STANDARDS The .Fn remquo functions conform to ISO/IEC 9899:1999(E).