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annotate ampi.c @ 0:d7da3b1e1540 libtomcrypt

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put back the 0.95 makefile which was inadvertently merged over
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:21:40 +0000
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d7da3b1e1540 put back the 0.95 makefile which was inadvertently merged over
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1 /* Code submitted by Svante Seleborg, cleaned up by Tom St Denis */
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2
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3 #include "mycrypt.h"
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4 #include <stdarg.h>
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5
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6 #ifdef MPI
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7
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8 mp_err mp_init_multi(mp_int *mp, ...)
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9 {
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10 mp_err res = MP_OKAY; /* Assume ok until proven otherwise */
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11 int n = 0; /* Number of ok inits */
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12 mp_int* cur_arg = mp;
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13 va_list args;
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14
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15 va_start(args, mp); /* init args to next argument from caller */
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16 while (cur_arg != NULL) {
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17 if (mp_init(cur_arg) != MP_OKAY) {
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18 /* Oops - error! Back-track and mp_clear what we already
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19 succeeded in init-ing, then return error.
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20 */
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21 va_list clean_args;
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22 cur_arg = mp;
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23 va_start(clean_args, mp);
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24 while (n--) {
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25 mp_clear(cur_arg);
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26 cur_arg = va_arg(clean_args, mp_int*);
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27 }
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28 va_end(clean_args);
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29 res = MP_MEM;
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30 break;
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31 }
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32 n++;
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33 cur_arg = va_arg(args, mp_int*);
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34 }
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35 va_end(args);
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36 return res; /* Assumed ok, if error flagged above. */
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37 }
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38
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39 /*
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40 Clear all arguments given, ended by a NULL marker.
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41 */
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42 void mp_clear_multi(mp_int *mp, ...)
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43 {
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44 mp_int* next_mp = mp;
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45 va_list args;
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46 va_start(args, mp);
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47 while (next_mp != NULL) {
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48 mp_clear(next_mp);
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49 next_mp = va_arg(args, mp_int*);
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50 }
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51 va_end(args);
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52 }
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53
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54 #endif
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55