NetBSD/gnu/usr.bin/groff/libgroff/fmod.c

/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
     Written by James Clark (jjc@jclark.com)

This file is part of groff.

groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with groff; see the file COPYING.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

#ifndef lint
static char rcsid[] = "$Id: fmod.c,v 1.2 1993/08/02 17:44:02 mycroft Exp $";
#endif /* not lint */

#include <math.h>

double fmod(x, y)
     double x, y;
{
  double quot = x/y;
  return x - (quot < 0.0 ? ceil(quot) : floor(quot)) * y;
}