src/libs/libgroff/fmod.c

   1 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   2      Written by James Clark (jjc@jclark.com)
   3
   4 This file is part of groff.
   5
   6 groff is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License along
  17 with groff; see the file COPYING.  If not, write to the Free Software
  18 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  19
  20 #include <math.h>
  21
  22 double fmod(x, y)
  23      double x, y;
  24 {
  25   double quot = x/y;
  26   return x - (quot < 0.0 ? ceil(quot) : floor(quot)) * y;
  27 }
  28