1/* $NetBSD: bn_mp_clear.c,v 1.1.1.1 2011/04/13 18:14:54 elric 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) */ 21void 22mp_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 */ 47