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annotate libtommath/bn_mp_clamp.c @ 447:278805938dcf

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Patch from Nicolai Ehemann to try binding before going to the background, so that if it exits early (because something's already listening etc) then it will return an exitcode of 1.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 19 Jul 2007 15:54:18 +0000
parents 5ff8218bcee9
children 60fc6476e044
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1 #include <tommath.h>
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2 #ifdef BN_MP_CLAMP_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * The library is free for all purposes without any express
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13 * guarantee it works.
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14 *
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15 * Tom St Denis, [email protected], http://math.libtomcrypt.com
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16 */
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17
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18 /* trim unused digits
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19 *
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20 * This is used to ensure that leading zero digits are
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21 * trimed and the leading "used" digit will be non-zero
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22 * Typically very fast. Also fixes the sign if there
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23 * are no more leading digits
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24 */
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25 void
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26 mp_clamp (mp_int * a)
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27 {
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28 /* decrease used while the most significant digit is
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29 * zero.
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30 */
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31 while (a->used > 0 && a->dp[a->used - 1] == 0) {
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32 --(a->used);
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33 }
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35 /* reset the sign flag if used == 0 */
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36 if (a->used == 0) {
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37 a->sign = MP_ZPOS;
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38 }
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39 }
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40 #endif
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42 /* $Source: /cvs/libtom/libtommath/bn_mp_clamp.c,v $ */
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43 /* $Revision: 1.3 $ */
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44 /* $Date: 2006/03/31 14:18:44 $ */