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