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      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