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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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53 |
