bn_mp_or.c revision 1.1.1.1.10.1
1/* $NetBSD: bn_mp_or.c,v 1.1.1.1.10.1 2014/08/19 23:45:18 tls Exp $ */ 2 3#include <tommath.h> 4#ifdef BN_MP_OR_C 5/* LibTomMath, multiple-precision integer library -- Tom St Denis 6 * 7 * LibTomMath is a library that provides multiple-precision 8 * integer arithmetic as well as number theoretic functionality. 9 * 10 * The library was designed directly after the MPI library by 11 * Michael Fromberger but has been written from scratch with 12 * additional optimizations in place. 13 * 14 * The library is free for all purposes without any express 15 * guarantee it works. 16 * 17 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org 18 */ 19 20/* OR two ints together */ 21int mp_or (mp_int * a, mp_int * b, mp_int * c) 22{ 23 int res, ix, px; 24 mp_int t, *x; 25 26 if (a->used > b->used) { 27 if ((res = mp_init_copy (&t, a)) != MP_OKAY) { 28 return res; 29 } 30 px = b->used; 31 x = b; 32 } else { 33 if ((res = mp_init_copy (&t, b)) != MP_OKAY) { 34 return res; 35 } 36 px = a->used; 37 x = a; 38 } 39 40 for (ix = 0; ix < px; ix++) { 41 t.dp[ix] |= x->dp[ix]; 42 } 43 mp_clamp (&t); 44 mp_exch (c, &t); 45 mp_clear (&t); 46 return MP_OKAY; 47} 48#endif 49 50/* Source: /cvs/libtom/libtommath/bn_mp_or.c,v */ 51/* Revision: 1.4 */ 52/* Date: 2006/12/28 01:25:13 */ 53