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1 | #include <tommath.h> |
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2 | #ifdef BN_MP_CLEAR_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, tomstdenis@gmail.com, http://math.libtomcrypt.com |
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16 | */ |
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17 | |
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18 | /* clear one (frees) */ |
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19 | void |
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20 | mp_clear (mp_int * a) |
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21 | { |
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22 | int i; |
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23 | |
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24 | /* only do anything if a hasn't been freed previously */ |
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25 | if (a->dp != NULL) { |
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26 | /* first zero the digits */ |
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27 | for (i = 0; i < a->used; i++) { |
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28 | a->dp[i] = 0; |
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29 | } |
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30 | |
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31 | /* free ram */ |
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32 | XFREE(a->dp); |
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33 | |
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34 | /* reset members to make debugging easier */ |
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35 | a->dp = NULL; |
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36 | a->alloc = a->used = 0; |
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37 | a->sign = MP_ZPOS; |
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38 | } |
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39 | } |
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40 | #endif |
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41 | |
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42 | /* $Source: /cvsroot/tcl/libtommath/bn_mp_clear.c,v $ */ |
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43 | /* $Revision: 1.1.1.3 $ */ |
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44 | /* $Date: 2006/12/01 00:08:11 $ */ |
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