1#include <tommath.h>
2#ifdef BN_MP_CLAMP_C
3/* LibTomMath, multiple-precision integer library -- Tom St Denis
4 *
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
7 *
8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place.
11 *
12 * The library is free for all purposes without any express
13 * guarantee it works.
14 *
15 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
16 */
17
18/* trim unused digits
19 *
20 * This is used to ensure that leading zero digits are
21 * trimed and the leading "used" digit will be non-zero
22 * Typically very fast.  Also fixes the sign if there
23 * are no more leading digits
24 */
25void
26mp_clamp (mp_int * a)
27{
28  /* decrease used while the most significant digit is
29   * zero.
30   */
31  while (a->used > 0 && a->dp[a->used - 1] == 0) {
32    --(a->used);
33  }
34
35  /* reset the sign flag if used == 0 */
36  if (a->used == 0) {
37    a->sign = MP_ZPOS;
38  }
39}
40#endif
41
42/* $Source: /cvs/libtom/libtommath/bn_mp_clamp.c,v $ */
43/* $Revision: 1.4 $ */
44/* $Date: 2006/12/28 01:25:13 $ */
45