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comparison bn_mp_abs.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 /* b = |a|
18 *
19 * Simple function copies the input and fixes the sign to positive
20 */
21 int
22 mp_abs (mp_int * a, mp_int * b)
23 {
24 int res;
25
26 /* copy a to b */
27 if (a != b) {
28 if ((res = mp_copy (a, b)) != MP_OKAY) {
29 return res;
30 }
31 }
32
33 /* force the sign of b to positive */
34 b->sign = MP_ZPOS;
35
36 return MP_OKAY;
37 }