| 12345678910111213141516171819202122232425262728293031323334353637383940 |
- #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, tomstdenis@gmail.com, http://math.libtomcrypt.com
- */
- /* 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
- /* $Source: /cvs/libtom/libtommath/bn_mp_neg.c,v $ */
- /* $Revision: 1.3 $ */
- /* $Date: 2006/03/31 14:18:44 $ */
|
