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annotate libtommath/bn_mp_init.c @ 774:e8b2ca448928

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author Matt Johnston <matt@ucc.asn.au>
date Sun, 14 Apr 2013 23:08:57 +0800
parents 5ff8218bcee9
children 60fc6476e044
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1 #include <tommath.h>
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2 #ifdef BN_MP_INIT_C
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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.com
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16 */
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18 /* init a new mp_int */
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19 int mp_init (mp_int * a)
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20 {
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21 int i;
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23 /* allocate memory required and clear it */
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24 a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * MP_PREC);
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25 if (a->dp == NULL) {
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26 return MP_MEM;
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27 }
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29 /* set the digits to zero */
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30 for (i = 0; i < MP_PREC; i++) {
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31 a->dp[i] = 0;
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32 }
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34 /* set the used to zero, allocated digits to the default precision
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35 * and sign to positive */
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36 a->used = 0;
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37 a->alloc = MP_PREC;
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38 a->sign = MP_ZPOS;
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40 return MP_OKAY;
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41 }
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42 #endif
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44 /* $Source: /cvs/libtom/libtommath/bn_mp_init.c,v $ */
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45 /* $Revision: 1.3 $ */
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46 /* $Date: 2006/03/31 14:18:44 $ */