1#include <tommath.h>
2#ifdef BN_MP_MOD_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/* c = a mod b, 0 <= c < b */
19int
20mp_mod (mp_int * a, mp_int * b, mp_int * c)
21{
22  mp_int  t;
23  int     res;
24
25  if ((res = mp_init (&t)) != MP_OKAY) {
26    return res;
27  }
28
29  if ((res = mp_div (a, b, NULL, &t)) != MP_OKAY) {
30    mp_clear (&t);
31    return res;
32  }
33
34  if (t.sign != b->sign) {
35    res = mp_add (b, &t, c);
36  } else {
37    res = MP_OKAY;
38    mp_exch (&t, c);
39  }
40
41  mp_clear (&t);
42  return res;
43}
44#endif
45
46/* $Source: /cvs/libtom/libtommath/bn_mp_mod.c,v $ */
47/* $Revision: 1.3 $ */
48/* $Date: 2006/03/31 14:18:44 $ */
49