Mercurial > dropbear
comparison bn_mp_abs.c @ 282:91fbc376f010 libtommath-orig libtommath-0.35
Import of libtommath 0.35
From ltm-0.35.tar.bz2 SHA1 of 3f193dbae9351e92d02530994fa18236f7fde01c
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 08 Mar 2006 13:16:18 +0000 |
parents | |
children | 97db060d0ef5 |
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-1:000000000000 | 282:91fbc376f010 |
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1 #include <tommath.h> | |
2 #ifdef BN_MP_ABS_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 * | |
15 * Tom St Denis, [email protected], http://math.libtomcrypt.org | |
16 */ | |
17 | |
18 /* b = |a| | |
19 * | |
20 * Simple function copies the input and fixes the sign to positive | |
21 */ | |
22 int | |
23 mp_abs (mp_int * a, mp_int * b) | |
24 { | |
25 int res; | |
26 | |
27 /* copy a to b */ | |
28 if (a != b) { | |
29 if ((res = mp_copy (a, b)) != MP_OKAY) { | |
30 return res; | |
31 } | |
32 } | |
33 | |
34 /* force the sign of b to positive */ | |
35 b->sign = MP_ZPOS; | |
36 | |
37 return MP_OKAY; | |
38 } | |
39 #endif |