1/*	$NetBSD: bn_mp_shrink.c,v 1.2 2017/01/28 21:31:47 christos Exp $	*/
2
3#include <tommath.h>
4#ifdef BN_MP_SHRINK_C
5/* LibTomMath, multiple-precision integer library -- Tom St Denis
6 *
7 * LibTomMath is a library that provides multiple-precision
8 * integer arithmetic as well as number theoretic functionality.
9 *
10 * The library was designed directly after the MPI library by
11 * Michael Fromberger but has been written from scratch with
12 * additional optimizations in place.
13 *
14 * The library is free for all purposes without any express
15 * guarantee it works.
16 *
17 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
18 */
19
20/* shrink a bignum */
21int mp_shrink (mp_int * a)
22{
23  mp_digit *tmp;
24  int used = 1;
25
26  if(a->used > 0)
27    used = a->used;
28
29  if (a->alloc != used) {
30    if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * used)) == NULL) {
31      return MP_MEM;
32    }
33    a->dp    = tmp;
34    a->alloc = used;
35  }
36  return MP_OKAY;
37}
38#endif
39
40/* Source: /cvs/libtom/libtommath/bn_mp_shrink.c,v  */
41/* Revision: 1.4  */
42/* Date: 2006/12/28 01:25:13  */
43