tommath/bn_mp_clear.c

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#include <tommath_private.h>
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#ifdef BN_MP_CLEAR_C
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/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
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* LibTomMath is a library that provides multiple-precision
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* integer arithmetic as well as number theoretic functionality.
*
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* The library was designed directly after the MPI library by
* Michael Fromberger but has been written from scratch with
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* additional optimizations in place.
*
* The library is free for all purposes without any express
* guarantee it works.
*
* Tom St Denis, tstdenis82@gmail.com, http://libtom.org
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*/
/* clear one (frees) */
void
mp_clear (mp_int * a)
{
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int i;
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/* only do anything if a hasn't been freed previously */
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if (a->dp != NULL) {
/* first zero the digits */
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for (i = 0; i < a->used; i++) {
a->dp[i] = 0;
}
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/* free ram */
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XFREE(a->dp);
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/* reset members to make debugging easier */
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a->dp = NULL;
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a->alloc = a->used = 0;
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a->sign = MP_ZPOS;
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}
}
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#endif
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