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

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 1, 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 LICENSE.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */


/* Modified by H.J. Lu for Linux */

#include <math.h>

double drem(double x, double y)
{
  double quot;

  if (x == 0.0 || y == 0.0) return (x);

  quot = x/y;
  if (quot > 0.0) quot += 0.5;
  else quot -= 0.5;
  return x - (quot < 0.0 ? ceil(quot) : floor(quot)) * y;
}