release/src/router/dropbear/libtommath/bn_mp_or.c

   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@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 $ */