Mercurial > dropbear

comparison libtommath/bn_mp_or.c @ 330:5488db2e9e4e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
merge of 332f709a4cb39cde4cedab7c3be89e05f3023067 and ca4ca78b82c5d430c69ce01bf794e8886ce81431
author Matt Johnston <matt@ucc.asn.au>
date Sat, 10 Jun 2006 16:39:40 +0000
parents eed26cff980b
children 5ff8218bcee9
comparison
equal deleted inserted replaced
329:8ed0dce45126 330:5488db2e9e4e
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, [email protected], http://math.libtomcrypt.org
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