annotate bn_mp_init_multi.c @ 139:cc04b085e7dd libtommath

Pristine compilation works.
author Matt Johnston <matt@ucc.asn.au>
date Fri, 17 Dec 2004 06:27:22 +0000
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children d29b64170cf0
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1 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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2 *
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3 * LibTomMath is a library that provides multiple-precision
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4 * integer arithmetic as well as number theoretic functionality.
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5 *
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6 * The library was designed directly after the MPI library by
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7 * Michael Fromberger but has been written from scratch with
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8 * additional optimizations in place.
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9 *
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10 * The library is free for all purposes without any express
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11 * guarantee it works.
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12 *
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13 * Tom St Denis, [email protected], http://math.libtomcrypt.org
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14 */
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15 #include <tommath.h>
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16 #include <stdarg.h>
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17
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18 int mp_init_multi(mp_int *mp, ...)
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19 {
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20 mp_err res = MP_OKAY; /* Assume ok until proven otherwise */
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21 int n = 0; /* Number of ok inits */
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22 mp_int* cur_arg = mp;
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23 va_list args;
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24
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25 va_start(args, mp); /* init args to next argument from caller */
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26 while (cur_arg != NULL) {
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27 if (mp_init(cur_arg) != MP_OKAY) {
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28 /* Oops - error! Back-track and mp_clear what we already
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29 succeeded in init-ing, then return error.
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30 */
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31 va_list clean_args;
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32
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33 /* end the current list */
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34 va_end(args);
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35
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36 /* now start cleaning up */
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37 cur_arg = mp;
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38 va_start(clean_args, mp);
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39 while (n--) {
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40 mp_clear(cur_arg);
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41 cur_arg = va_arg(clean_args, mp_int*);
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42 }
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43 va_end(clean_args);
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44 res = MP_MEM;
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45 break;
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46 }
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47 n++;
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48 cur_arg = va_arg(args, mp_int*);
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49 }
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50 va_end(args);
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51 return res; /* Assumed ok, if error flagged above. */
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52 }
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