/* Arithmetic.
- Copyright (C) 2001 Free Software Foundation, Inc.
- Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+ Copyright (C) 2001-2002 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
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Specification. */
#include "gcd.h"
#include <stdlib.h>
/* Return the greatest common divisor of a > 0 and b > 0. */
-unsigned int
-gcd (a, b)
- unsigned int a;
- unsigned int b;
+unsigned long
+gcd (unsigned long a, unsigned long b)
{
/* Why no division, as in Euclid's algorithm? Because in Euclid's algorithm
the division result floor(a/b) or floor(b/a) is very often = 1 or = 2,
bit in a single instruction, and the algorithm uses fewer variables than
Euclid's algorithm. */
- unsigned int c = a | b;
+ unsigned long c = a | b;
c = c ^ (c - 1);
/* c = largest power of 2 that divides a and b. */