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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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