/home/ntakagi/work/tcl8.5.1/libtommath/bn_mp_clear.c Source File

00001 #include <tommath.h>
00002 #ifdef BN_MP_CLEAR_C
00003 /* LibTomMath, multiple-precision integer library -- Tom St Denis
00004  *
00005  * LibTomMath is a library that provides multiple-precision
00006  * integer arithmetic as well as number theoretic functionality.
00007  *
00008  * The library was designed directly after the MPI library by
00009  * Michael Fromberger but has been written from scratch with
00010  * additional optimizations in place.
00011  *
00012  * The library is free for all purposes without any express
00013  * guarantee it works.
00014  *
00015  * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
00016  */
00017 
00018 /* clear one (frees)  */
00019 void
00020 mp_clear (mp_int * a)
00021 {
00022   int i;
00023 
00024   /* only do anything if a hasn't been freed previously */
00025   if (a->dp != NULL) {
00026     /* first zero the digits */
00027     for (i = 0; i < a->used; i++) {
00028         a->dp[i] = 0;
00029     }
00030 
00031     /* free ram */
00032     XFREE(a->dp);
00033 
00034     /* reset members to make debugging easier */
00035     a->dp    = NULL;
00036     a->alloc = a->used = 0;
00037     a->sign  = MP_ZPOS;
00038   }
00039 }
00040 #endif
00041 
00042 /* $Source: /cvsroot/tcl/libtommath/bn_mp_clear.c,v $ */
00043 /* $Revision: 1.1.1.3 $ */
00044 /* $Date: 2006/12/01 00:08:11 $ */