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comparison libtommath/bn_mp_init_multi.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_MULTI_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 #include <stdarg.h>
18
19 int mp_init_multi(mp_int *mp, ...)
20 {
21 mp_err res = MP_OKAY; /* Assume ok until proven otherwise */
22 int n = 0; /* Number of ok inits */
23 mp_int* cur_arg = mp;
24 va_list args;
25
26 va_start(args, mp); /* init args to next argument from caller */
27 while (cur_arg != NULL) {
28 if (mp_init(cur_arg) != MP_OKAY) {
29 /* Oops - error! Back-track and mp_clear what we already
30 succeeded in init-ing, then return error.
31 */
32 va_list clean_args;
33
34 /* end the current list */
35 va_end(args);
36
37 /* now start cleaning up */
38 cur_arg = mp;
39 va_start(clean_args, mp);
40 while (n--) {
41 mp_clear(cur_arg);
42 cur_arg = va_arg(clean_args, mp_int*);
43 }
44 va_end(clean_args);
45 res = MP_MEM;
46 break;
47 }
48 n++;
49 cur_arg = va_arg(args, mp_int*);
50 }
51 va_end(args);
52 return res; /* Assumed ok, if error flagged above. */
53 }
54
55 #endif