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comparison bn_mp_init_size.c @ 1:22d5cf7d4b1a libtommath

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Renaming branch
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:23:46 +0000
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-1:000000000000 1:22d5cf7d4b1a
1 /* LibTomMath, multiple-precision integer library -- Tom St Denis
2 *
3 * LibTomMath is a library that provides multiple-precision
4 * integer arithmetic as well as number theoretic functionality.
5 *
6 * The library was designed directly after the MPI library by
7 * Michael Fromberger but has been written from scratch with
8 * additional optimizations in place.
9 *
10 * The library is free for all purposes without any express
11 * guarantee it works.
12 *
13 * Tom St Denis, [email protected], http://math.libtomcrypt.org
14 */
15 #include <tommath.h>
16
17 /* init an mp_init for a given size */
18 int mp_init_size (mp_int * a, int size)
19 {
20 /* pad size so there are always extra digits */
21 size += (MP_PREC * 2) - (size % MP_PREC);
22
23 /* alloc mem */
24 a->dp = OPT_CAST(mp_digit) XCALLOC (sizeof (mp_digit), size);
25 if (a->dp == NULL) {
26 return MP_MEM;
27 }
28 a->used = 0;
29 a->alloc = size;
30 a->sign = MP_ZPOS;
31
32 return MP_OKAY;
33 }