kc3-lang/libtommath/mp_neg.c

• Show log

  Commit

• Hash : 1cc289d2
  Author :
  Date : 2019-11-09T20:23:03
  

  better use of mp_isneg() and mp_iszero()

Download

• mp_neg.c

• #include "tommath_private.h"
  #ifdef MP_NEG_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* b = -a */
  mp_err mp_neg(const mp_int *a, mp_int *b)
  {
     mp_err err;
     if ((err = mp_copy(a, b)) != MP_OKAY) {
        return err;
     }
  
     b->sign = ((!mp_iszero(b) && !mp_isneg(b)) ? MP_NEG : MP_ZPOS);
  
     return MP_OKAY;
  }
  #endif
  

Download