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comparison libtommath/bn_mp_init.c @ 284:eed26cff980b

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propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 6c790cad5a7fa866ad062cb3a0c279f7ba788583) to branch 'au.asn.ucc.matt.dropbear' (head fff0894a0399405a9410ea1c6d118f342cf2aa64)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:49 +0000
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children 5ff8218bcee9
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283:bd240aa12ba7 284:eed26cff980b
1 #include <tommath.h>
2 #ifdef BN_MP_INIT_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, [email protected], http://math.libtomcrypt.org
16 */
17
18 /* init a new mp_int */
19 int mp_init (mp_int * a)
20 {
21 int i;
22
23 /* allocate memory required and clear it */
24 a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * MP_PREC);
25 if (a->dp == NULL) {
26 return MP_MEM;
27 }
28
29 /* set the digits to zero */
30 for (i = 0; i < MP_PREC; i++) {
31 a->dp[i] = 0;
32 }
33
34 /* set the used to zero, allocated digits to the default precision
35 * and sign to positive */
36 a->used = 0;
37 a->alloc = MP_PREC;
38 a->sign = MP_ZPOS;
39
40 return MP_OKAY;
41 }
42 #endif