|
282
|
1 #include <tommath.h> |
|
|
2 #ifdef BN_MP_CMP_MAG_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 * |
|
386
|
15 * Tom St Denis, [email protected], http://math.libtomcrypt.com |
|
282
|
16 */ |
|
|
17 |
|
|
18 /* compare maginitude of two ints (unsigned) */ |
|
|
19 int mp_cmp_mag (mp_int * a, mp_int * b) |
|
|
20 { |
|
|
21 int n; |
|
|
22 mp_digit *tmpa, *tmpb; |
|
|
23 |
|
|
24 /* compare based on # of non-zero digits */ |
|
|
25 if (a->used > b->used) { |
|
|
26 return MP_GT; |
|
|
27 } |
|
|
28 |
|
|
29 if (a->used < b->used) { |
|
|
30 return MP_LT; |
|
|
31 } |
|
|
32 |
|
|
33 /* alias for a */ |
|
|
34 tmpa = a->dp + (a->used - 1); |
|
|
35 |
|
|
36 /* alias for b */ |
|
|
37 tmpb = b->dp + (a->used - 1); |
|
|
38 |
|
|
39 /* compare based on digits */ |
|
|
40 for (n = 0; n < a->used; ++n, --tmpa, --tmpb) { |
|
|
41 if (*tmpa > *tmpb) { |
|
|
42 return MP_GT; |
|
|
43 } |
|
|
44 |
|
|
45 if (*tmpa < *tmpb) { |
|
|
46 return MP_LT; |
|
|
47 } |
|
|
48 } |
|
|
49 return MP_EQ; |
|
|
50 } |
|
|
51 #endif |
|
386
|
52 |
|
|
53 /* $Source: /cvs/libtom/libtommath/bn_mp_cmp_mag.c,v $ */ |
|
|
54 /* $Revision: 1.3 $ */ |
|
|
55 /* $Date: 2006/03/31 14:18:44 $ */ |
