1#include <tommath.h>
2#ifdef BN_MP_INIT_SIZE_C
3/* LibTomMath, multiple-precision integer library -- Tom St Denis
4 *
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
7 *
8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place.
11 *
12 * The library is free for all purposes without any express
13 * guarantee it works.
14 *
15 * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
16 */
17
18/* init an mp_init for a given size */
19int mp_init_size (mp_int * a, int size)
20{
21  int x;
22
23  /* pad size so there are always extra digits */
24  size += (MP_PREC * 2) - (size % MP_PREC);
25
26  /* alloc mem */
27  a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size);
28  if (a->dp == NULL) {
29    return MP_MEM;
30  }
31
32  /* set the members */
33  a->used  = 0;
34  a->alloc = size;
35  a->sign  = MP_ZPOS;
36
37  /* zero the digits */
38  for (x = 0; x < size; x++) {
39      a->dp[x] = 0;
40  }
41
42  return MP_OKAY;
43}
44#endif
45
46/* $Source: /cvs/libtom/libtommath/bn_mp_init_size.c,v $ */
47/* $Revision: 1.3 $ */
48/* $Date: 2006/03/31 14:18:44 $ */
49