1 /* $NetBSD: bn_mp_cmp_d.c,v 1.2 2017/01/28 21:31:47 christos Exp $ */
2
3 #include <tommath.h>
4 #ifdef BN_MP_CMP_D_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 a digit */
mp_cmp_d(mp_int * a,mp_digit b)21 int mp_cmp_d(mp_int * a, mp_digit b)
22 {
23 /* compare based on sign */
24 if (a->sign == MP_NEG) {
25 return MP_LT;
26 }
27
28 /* compare based on magnitude */
29 if (a->used > 1) {
30 return MP_GT;
31 }
32
33 /* compare the only digit of a to b */
34 if (a->dp[0] > b) {
35 return MP_GT;
36 } else if (a->dp[0] < b) {
37 return MP_LT;
38 } else {
39 return MP_EQ;
40 }
41 }
42 #endif
43
44 /* Source: /cvs/libtom/libtommath/bn_mp_cmp_d.c,v */
45 /* Revision: 1.4 */
46 /* Date: 2006/12/28 01:25:13 */
47