1 #include <tommath.h> 2 #ifdef BN_MP_OR_C 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 4 * 5 * LibTomMath is a library that provides multiple-precision 6 * integer arithmetic as well as number theoretic functionality. 7 * 8 * The library was designed directly after the MPI library by 9 * Michael Fromberger but has been written from scratch with 10 * additional optimizations in place. 11 * 12 * The library is free for all purposes without any express 13 * guarantee it works. 14 * 15 * Tom St Denis, tomstdenis (at) gmail.com, http://math.libtomcrypt.com 16 */ 17 18 /* OR two ints together */ 19 int mp_or (mp_int * a, mp_int * b, mp_int * c) 20 { 21 int res, ix, px; 22 mp_int t, *x; 23 24 if (a->used > b->used) { 25 if ((res = mp_init_copy (&t, a)) != MP_OKAY) { 26 return res; 27 } 28 px = b->used; 29 x = b; 30 } else { 31 if ((res = mp_init_copy (&t, b)) != MP_OKAY) { 32 return res; 33 } 34 px = a->used; 35 x = a; 36 } 37 38 for (ix = 0; ix < px; ix++) { 39 t.dp[ix] |= x->dp[ix]; 40 } 41 mp_clamp (&t); 42 mp_exch (c, &t); 43 mp_clear (&t); 44 return MP_OKAY; 45 } 46 #endif 47 48 /* $Source: /cvs/libtom/libtommath/bn_mp_or.c,v $ */ 49 /* $Revision: 1.3 $ */ 50 /* $Date: 2006/03/31 14:18:44 $ */ 51
