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authorMiles Bader <miles@gnu.org>1996-04-02 23:33:15 +0000
committerMiles Bader <miles@gnu.org>1996-04-02 23:33:15 +0000
commit2ec19843ad88ef94aa08e142ce57b62c01776668 (patch)
treed29c7e94f7fa224d3e755b47451f40e6a8a50e91
parentbe9d02f40457b4dbd870c1c3db2c8a7296165d92 (diff)
Initial revision
-rw-r--r--libshouldbeinlibc/lcm.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/libshouldbeinlibc/lcm.c b/libshouldbeinlibc/lcm.c
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+/* Lcm (least common multiple), and gcd (greatest common divisor)
+
+ Copyright (C) 1996 Free Software Foundation, Inc.
+
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd 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.
+
+ The GNU Hurd 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* There are probably more efficient ways to do these... */
+
+/* Return the greatest common divisor of p & q. */
+inline long
+gcd (long p, long q)
+{
+ if (p == 0)
+ return q;
+ else if (q == 0)
+ return p;
+ else if (p == q)
+ return p;
+ else if (q > p)
+ return gcd (q, p);
+ else
+ return gcd (q, p % q);
+}
+
+/* Return the least common multiple of p & q. */
+long
+lcm (long p, long q)
+{
+ return (p / gcd (p, q)) * q;
+}