ref: c172881606bfa194399a0b181b419a34488331d6
dir: /sys/src/ape/cmd/diff/cmpbuf.c/
/* Buffer primitives for comparison operations.
Copyright (C) 1993 Free Software Foundation, Inc.
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 2, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "system.h"
#include "cmpbuf.h"
/* Least common multiple of two buffer sizes A and B. */
size_t
buffer_lcm (a, b)
size_t a, b;
{
size_t m, n, r;
/* Yield reasonable values if buffer sizes are zero. */
if (!a)
return b ? b : 8 * 1024;
if (!b)
return a;
/* n = gcd (a, b) */
for (m = a, n = b; (r = m % n) != 0; m = n, n = r)
continue;
return a/n * b;
}