text: #include <tommath_private.h>
  #ifdef BN_MP_MOD_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, tstdenis82@gmail.com, http://libtom.org
   */
  
  /* c = a mod b, 0 <= c < b if b > 0, b < c <= 0 if b < 0 */
  int
  mp_mod (mp_int * a, mp_int * b, mp_int * c)
  {
    mp_int  t;
    int     res;
  
    if ((res = mp_init_size (&t, b->used)) != MP_OKAY) {
      return res;
    }
  
    if ((res = mp_div (a, b, NULL, &t)) != MP_OKAY) {
      mp_clear (&t);
      return res;
    }
  
    if ((mp_iszero(&t) != MP_NO) || (t.sign == b->sign)) {
      res = MP_OKAY;
      mp_exch (&t, c);
    } else {
      res = mp_add (b, &t, c);
    }
  
    mp_clear (&t);
    return res;
  }
  #endif
  
  /* ref:         $Format:%D$ */
  /* git commit:  $Format:%H$ */
  /* commit time: $Format:%ai$ */
  