Mercurial > dropbear

annotate libtommath/bn_mp_abs.c @ 401:a7eb64b9966a channel-fix

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merge of '7ac513addd924cd0391e7db26c067024c3c257f6' and 'b24757c764465a206a258bae27ac0509fc56cd16'
author Matt Johnston <matt@ucc.asn.au>
date Sat, 03 Feb 2007 08:20:47 +0000
parents eed26cff980b
children 5ff8218bcee9
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1 #include <tommath.h>
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2 #ifdef BN_MP_ABS_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * The library is free for all purposes without any express
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13 * guarantee it works.
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14 *
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15 * Tom St Denis, [email protected], http://math.libtomcrypt.org
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16 */
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17
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18 /* b = |a|
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19 *
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20 * Simple function copies the input and fixes the sign to positive
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21 */
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22 int
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23 mp_abs (mp_int * a, mp_int * b)
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24 {
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25 int res;
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26
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27 /* copy a to b */
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28 if (a != b) {
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29 if ((res = mp_copy (a, b)) != MP_OKAY) {
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30 return res;
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31 }
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32 }
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33
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34 /* force the sign of b to positive */
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35 b->sign = MP_ZPOS;
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36
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37 return MP_OKAY;
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38 }
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39 #endif