1/*	$NetBSD: bn_mp_and.c,v 1.2 2017/01/28 21:31:47 christos Exp $	*/
2
3#include <tommath.h>
4#ifdef BN_MP_AND_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/* AND two ints together */
21int
22mp_and (mp_int * a, mp_int * b, mp_int * c)
23{
24  int     res, ix, px;
25  mp_int  t, *x;
26
27  if (a->used > b->used) {
28    if ((res = mp_init_copy (&t, a)) != MP_OKAY) {
29      return res;
30    }
31    px = b->used;
32    x = b;
33  } else {
34    if ((res = mp_init_copy (&t, b)) != MP_OKAY) {
35      return res;
36    }
37    px = a->used;
38    x = a;
39  }
40
41  for (ix = 0; ix < px; ix++) {
42    t.dp[ix] &= x->dp[ix];
43  }
44
45  /* zero digits above the last from the smallest mp_int */
46  for (; ix < t.used; ix++) {
47    t.dp[ix] = 0;
48  }
49
50  mp_clamp (&t);
51  mp_exch (c, &t);
52  mp_clear (&t);
53  return MP_OKAY;
54}
55#endif
56
57/* Source: /cvs/libtom/libtommath/bn_mp_and.c,v  */
58/* Revision: 1.4  */
59/* Date: 2006/12/28 01:25:13  */
60