Mercurial > dropbear
view libtommath/bn_mp_neg.c @ 360:09cb54106e89 insecure-nocrypto
explicit merge of '0501e6f661b5415eb76f3b312d183c3adfbfb712'
and '2b954d406290e6a2be8eb4a262d3675ac95ac544'
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Mon, 02 Oct 2006 06:39:32 +0000 |
parents | eed26cff980b |
children | 5ff8218bcee9 |
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#include <tommath.h> #ifdef BN_MP_NEG_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision * integer arithmetic as well as number theoretic functionality. * * The library was designed directly after the MPI library by * Michael Fromberger but has been written from scratch with * additional optimizations in place. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://math.libtomcrypt.org */ /* b = -a */ int mp_neg (mp_int * a, mp_int * b) { int res; if (a != b) { if ((res = mp_copy (a, b)) != MP_OKAY) { return res; } } if (mp_iszero(b) != MP_YES) { b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS; } else { b->sign = MP_ZPOS; } return MP_OKAY; } #endif