kc3-lang/libtommath/bn_mp_jacobi.c

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• Hash : ba786e6b
  Author :
  Date : 2018-05-11T00:50:52
  

  Call mp_kronecker from mp_jacobi to save some bytes while keeping the API

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• bn_mp_jacobi.c

• #include "tommath_private.h"
  #ifdef BN_MP_JACOBI_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.
   */
  
  /* computes the jacobi c = (a | n) (or Legendre if n is prime)
   * Kept for legacy reasons, please use mp_kronecker() instead
   */
  int mp_jacobi(const mp_int *a, const mp_int *n, int *c)
  {
     /* if a < 0 return MP_VAL */
     if (mp_isneg(a) == MP_YES) {
        return MP_VAL;
     }
  
     /* if n <= 0 return MP_VAL */
     if (mp_cmp_d(n, 0uL) != MP_GT) {
        return MP_VAL;
     }
  
     return mp_kronecker(a,n,c);
  }
  #endif
  
  /* ref:         $Format:%D$ */
  /* git commit:  $Format:%H$ */
  /* commit time: $Format:%ai$ */
  

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