1/*	$NetBSD: bn_mp_cmp_mag.c,v 1.2 2017/01/28 21:31:47 christos Exp $	*/
2
3#include <tommath.h>
4#ifdef BN_MP_CMP_MAG_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/* compare maginitude of two ints (unsigned) */
21int mp_cmp_mag (mp_int * a, mp_int * b)
22{
23  int     n;
24  mp_digit *tmpa, *tmpb;
25
26  /* compare based on # of non-zero digits */
27  if (a->used > b->used) {
28    return MP_GT;
29  }
30
31  if (a->used < b->used) {
32    return MP_LT;
33  }
34
35  /* alias for a */
36  tmpa = a->dp + (a->used - 1);
37
38  /* alias for b */
39  tmpb = b->dp + (a->used - 1);
40
41  /* compare based on digits  */
42  for (n = 0; n < a->used; ++n, --tmpa, --tmpb) {
43    if (*tmpa > *tmpb) {
44      return MP_GT;
45    }
46
47    if (*tmpa < *tmpb) {
48      return MP_LT;
49    }
50  }
51  return MP_EQ;
52}
53#endif
54
55/* Source: /cvs/libtom/libtommath/bn_mp_cmp_mag.c,v  */
56/* Revision: 1.4  */
57/* Date: 2006/12/28 01:25:13  */
58