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comparison bn_mp_init_multi.c @ 2:86e0b50a9b58 libtommath-orig ltm-0.30-orig

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ltm 0.30 orig import
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:25:22 +0000
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children d29b64170cf0
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-1:000000000000 2:86e0b50a9b58
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 #include <stdarg.h>
17
18 int mp_init_multi(mp_int *mp, ...)
19 {
20 mp_err res = MP_OKAY; /* Assume ok until proven otherwise */
21 int n = 0; /* Number of ok inits */
22 mp_int* cur_arg = mp;
23 va_list args;
24
25 va_start(args, mp); /* init args to next argument from caller */
26 while (cur_arg != NULL) {
27 if (mp_init(cur_arg) != MP_OKAY) {
28 /* Oops - error! Back-track and mp_clear what we already
29 succeeded in init-ing, then return error.
30 */
31 va_list clean_args;
32
33 /* end the current list */
34 va_end(args);
35
36 /* now start cleaning up */
37 cur_arg = mp;
38 va_start(clean_args, mp);
39 while (n--) {
40 mp_clear(cur_arg);
41 cur_arg = va_arg(clean_args, mp_int*);
42 }
43 va_end(clean_args);
44 res = MP_MEM;
45 break;
46 }
47 n++;
48 cur_arg = va_arg(args, mp_int*);
49 }
50 va_end(args);
51 return res; /* Assumed ok, if error flagged above. */
52 }
53