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 */
mp_shrink(mp_int * a)21 int 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