kc3-lang/libtommath/bn_mp_prime_is_divisible.c

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• Hash : 290c28c1
  Author :
  Date : 2019-05-07T09:49:26
  

  deprecate PRIME_SIZE in favor of MP_PRIME_SIZE

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• bn_mp_prime_is_divisible.c

• #include "tommath_private.h"
  #ifdef BN_MP_PRIME_IS_DIVISIBLE_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* determines if an integers is divisible by one
   * of the first MP_PRIME_SIZE primes or not
   *
   * sets result to 0 if not, 1 if yes
   */
  int mp_prime_is_divisible(const mp_int *a, int *result)
  {
     int     err, ix;
     mp_digit res;
  
     /* default to not */
     *result = MP_NO;
  
     for (ix = 0; ix < MP_PRIME_SIZE; ix++) {
        /* what is a mod LBL_prime_tab[ix] */
        if ((err = mp_mod_d(a, ltm_prime_tab[ix], &res)) != MP_OKAY) {
           return err;
        }
  
        /* is the residue zero? */
        if (res == 0u) {
           *result = MP_YES;
           return MP_OKAY;
        }
     }
  
     return MP_OKAY;
  }
  #endif
  

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