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comparison bn_mp_cmp.c @ 1:22d5cf7d4b1a libtommath

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Renaming branch
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:23:46 +0000
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-1:000000000000 1:22d5cf7d4b1a
1 /* LibTomMath, multiple-precision integer library -- Tom St Denis
2 *
3 * LibTomMath is a library that provides multiple-precision
4 * integer arithmetic as well as number theoretic functionality.
5 *
6 * The library was designed directly after the MPI library by
7 * Michael Fromberger but has been written from scratch with
8 * additional optimizations in place.
9 *
10 * The library is free for all purposes without any express
11 * guarantee it works.
12 *
13 * Tom St Denis, [email protected], http://math.libtomcrypt.org
14 */
15 #include <tommath.h>
16
17 /* compare two ints (signed)*/
18 int
19 mp_cmp (mp_int * a, mp_int * b)
20 {
21 /* compare based on sign */
22 if (a->sign != b->sign) {
23 if (a->sign == MP_NEG) {
24 return MP_LT;
25 } else {
26 return MP_GT;
27 }
28 }
29
30 /* compare digits */
31 if (a->sign == MP_NEG) {
32 /* if negative compare opposite direction */
33 return mp_cmp_mag(b, a);
34 } else {
35 return mp_cmp_mag(a, b);
36 }
37 }