crypto/external/bsd/heimdal/dist/lib/hcrypto/libtommath/bn_mp_clear.c

   1 /*      $NetBSD: bn_mp_clear.c,v 1.1.1.2 2014/04/24 12:45:31 pettai Exp $       */
   2
   3 #include <tommath.h>
   4 #ifdef BN_MP_CLEAR_C
   5 /* LibTomMath, multiple-precision integer library -- Tom St Denis
   6  *
   7  * LibTomMath is a library that provides multiple-precision
   8  * integer arithmetic as well as number theoretic functionality.
   9  *
  10  * The library was designed directly after the MPI library by
  11  * Michael Fromberger but has been written from scratch with
  12  * additional optimizations in place.
  13  *
  14  * The library is free for all purposes without any express
  15  * guarantee it works.
  16  *
  17  * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
  18  */
  19
  20 /* clear one (frees)  */
  21 void
  22 mp_clear (mp_int * a)
  23 {
  24   int i;
  25
  26   /* only do anything if a hasn't been freed previously */
  27   if (a->dp != NULL) {
  28     /* first zero the digits */
  29     for (i = 0; i < a->used; i++) {
  30         a->dp[i] = 0;
  31     }
  32
  33     /* free ram */
  34     XFREE(a->dp);
  35
  36     /* reset members to make debugging easier */
  37     a->dp    = NULL;
  38     a->alloc = a->used = 0;
  39     a->sign  = MP_ZPOS;
  40   }
  41 }
  42 #endif
  43
  44 /* Source: /cvs/libtom/libtommath/bn_mp_clear.c,v  */
  45 /* Revision: 1.4  */
  46 /* Date: 2006/12/28 01:25:13  */