| /* 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 |
| */ |
| #include <tommath.h> |
| |
| /* clear one (frees) */ |
| void |
| mp_clear (mp_int * a) |
| { |
| /* only do anything if a hasn't been freed previously */ |
| if (a->dp != NULL) { |
| /* first zero the digits */ |
| memset (a->dp, 0, sizeof (mp_digit) * a->used); |
| |
| /* free ram */ |
| XFREE(a->dp); |
| |
| /* reset members to make debugging easier */ |
| a->dp = NULL; |
| a->alloc = a->used = 0; |
| a->sign = MP_ZPOS; |
| } |
| } |