kc3-lang/libtommath/bn_mp_incr.c

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• Hash : fd68b652
  Author :
  Date : 2019-05-19T15:32:46
  

  refactor without err initialization

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• bn_mp_incr.c

• #include "tommath_private.h"
  #ifdef BN_MP_INCR_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* Increment "a" by one like "a++". Changes input! */
  mp_err mp_incr(mp_int *a)
  {
     if (MP_IS_ZERO(a)) {
        mp_set(a,1uL);
        return MP_OKAY;
     } else if (a->sign == MP_NEG) {
        mp_err err;
        a->sign = MP_ZPOS;
        if ((err = mp_decr(a)) != MP_OKAY) {
           return err;
        }
        /* There is no -0 in LTM */
        if (!MP_IS_ZERO(a)) {
           a->sign = MP_NEG;
        }
        return MP_OKAY;
     } else if (a->dp[0] < MP_MASK) {
        a->dp[0]++;
        return MP_OKAY;
     } else {
        return mp_add_d(a, 1uL,a);
     }
  }
  #endif
  

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