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142
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1 #include <tommath.h> |
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2 #ifdef BN_MP_INIT_MULTI_C |
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2
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis |
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4 * |
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5 * LibTomMath is a library that provides multiple-precision |
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6 * integer arithmetic as well as number theoretic functionality. |
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7 * |
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8 * The library was designed directly after the MPI library by |
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9 * Michael Fromberger but has been written from scratch with |
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10 * additional optimizations in place. |
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11 * |
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12 * The library is free for all purposes without any express |
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13 * guarantee it works. |
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14 * |
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15 * Tom St Denis, [email protected], http://math.libtomcrypt.org |
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16 */ |
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17 #include <stdarg.h> |
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18 |
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19 int mp_init_multi(mp_int *mp, ...) |
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20 { |
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21 mp_err res = MP_OKAY; /* Assume ok until proven otherwise */ |
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22 int n = 0; /* Number of ok inits */ |
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23 mp_int* cur_arg = mp; |
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24 va_list args; |
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25 |
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26 va_start(args, mp); /* init args to next argument from caller */ |
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27 while (cur_arg != NULL) { |
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28 if (mp_init(cur_arg) != MP_OKAY) { |
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29 /* Oops - error! Back-track and mp_clear what we already |
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30 succeeded in init-ing, then return error. |
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31 */ |
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32 va_list clean_args; |
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33 |
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34 /* end the current list */ |
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35 va_end(args); |
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36 |
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37 /* now start cleaning up */ |
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38 cur_arg = mp; |
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39 va_start(clean_args, mp); |
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40 while (n--) { |
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41 mp_clear(cur_arg); |
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42 cur_arg = va_arg(clean_args, mp_int*); |
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43 } |
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44 va_end(clean_args); |
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45 res = MP_MEM; |
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46 break; |
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47 } |
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48 n++; |
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49 cur_arg = va_arg(args, mp_int*); |
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50 } |
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51 va_end(args); |
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52 return res; /* Assumed ok, if error flagged above. */ |
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53 } |
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54 |
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142
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55 #endif |
