1 /* Buffer primitives for comparison operations.
2 Copyright (C) 1993 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
17
18 #include "system.h"
19 #include "cmpbuf.h"
20
21 /* Least common multiple of two buffer sizes A and B. */
22
23 size_t
buffer_lcm(a,b)24 buffer_lcm (a, b)
25 size_t a, b;
26 {
27 size_t m, n, r;
28
29 /* Yield reasonable values if buffer sizes are zero. */
30 if (!a)
31 return b ? b : 8 * 1024;
32 if (!b)
33 return a;
34
35 /* n = gcd (a, b) */
36 for (m = a, n = b; (r = m % n) != 0; m = n, n = r)
37 continue;
38
39 return a/n * b;
40 }
41