/* Arithmetic.

   Copyright (C) 2001-2002, 2006, 2009-2015 Free Software Foundation, Inc.

   Written by Bruno Haible <bruno@clisp.org>, 2001.

   This program 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 3 of the License, or

   (at your option) any later version.

   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef _GCD_H

#define _GCD_H

#ifdef __cplusplus

extern "C" {

#endif

/* Return the greatest common divisor of a > 0 and b > 0.  */

extern unsigned long gcd (unsigned long a, unsigned long b);

#ifdef __cplusplus

}

#endif

#endif /* _GCD_H */