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 */ 15 16 #include "system.h" 17 #include "cmpbuf.h" 18 19 /* Least common multiple of two buffer sizes A and B. */ 20 21 size_t 22 buffer_lcm (a, b) 23 size_t a, b; 24 { 25 size_t m, n, r; 26 27 /* Yield reasonable values if buffer sizes are zero. */ 28 if (!a) 29 return b ? b : 8 * 1024; 30 if (!b) 31 return a; 32 33 /* n = gcd (a, b) */ 34 for (m = a, n = b; (r = m % n) != 0; m = n, n = r) 35 continue; 36 37 return a/n * b; 38 } 39