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comparison bn_mp_neg.c @ 142:d29b64170cf0 libtommath-orig

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import of libtommath 0.32
author Matt Johnston <matt@ucc.asn.au>
date Sun, 19 Dec 2004 11:33:56 +0000
parents 86e0b50a9b58
children d8254fc979e9
comparison
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19:e1037a1e12e7 142:d29b64170cf0
1 #include <tommath.h>
2 #ifdef BN_MP_NEG_C
1 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
2 * 4 *
3 * LibTomMath is a library that provides multiple-precision 5 * LibTomMath is a library that provides multiple-precision
4 * integer arithmetic as well as number theoretic functionality. 6 * integer arithmetic as well as number theoretic functionality.
5 * 7 *
10 * The library is free for all purposes without any express 12 * The library is free for all purposes without any express
11 * guarantee it works. 13 * guarantee it works.
12 * 14 *
13 * Tom St Denis, [email protected], http://math.libtomcrypt.org 15 * Tom St Denis, [email protected], http://math.libtomcrypt.org
14 */ 16 */
15 #include <tommath.h>
16 17
17 /* b = -a */ 18 /* b = -a */
18 int mp_neg (mp_int * a, mp_int * b) 19 int mp_neg (mp_int * a, mp_int * b)
19 { 20 {
20 int res; 21 int res;
24 if (mp_iszero(b) != MP_YES) { 25 if (mp_iszero(b) != MP_YES) {
25 b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS; 26 b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS;
26 } 27 }
27 return MP_OKAY; 28 return MP_OKAY;
28 } 29 }
30 #endif