bn_mp_shrink.c

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Author : Francois Perrad
Date : 2017-10-15 19:58:35
Hash : f1d6c887
Message : refactor cast

bn_mp_shrink.c

#include <tommath_private.h>
#ifdef BN_MP_SHRINK_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
 */

/* shrink a bignum */
int mp_shrink(mp_int *a)
{
   mp_digit *tmp;
   int used = 1;

   if (a->used > 0) {
      used = a->used;
   }

   if (a->alloc != used) {
      if ((tmp = OPT_CAST(mp_digit) XREALLOC(a->dp, sizeof(mp_digit) * (size_t)used)) == NULL) {
         return MP_MEM;
      }
      a->dp    = tmp;
      a->alloc = used;
   }
   return MP_OKAY;
}
#endif

/* ref:         $Format:%D$ */
/* git commit:  $Format:%H$ */
/* commit time: $Format:%ai$ */

kc3-lang/libtommath/bn_mp_shrink.c

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