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comparison libtommath/bn_mp_clamp.c @ 1436:60fc6476e044

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Update to libtommath v1.0
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Jun 2017 22:37:14 +0800
parents 5ff8218bcee9
children 8bba51a55704
comparison
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1435:f849a5ca2efc 1436:60fc6476e044
1 #include <tommath.h> 1 #include <tommath_private.h>
2 #ifdef BN_MP_CLAMP_C 2 #ifdef BN_MP_CLAMP_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
4 * 4 *
5 * LibTomMath is a library that provides multiple-precision 5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality. 6 * integer arithmetic as well as number theoretic functionality.
10 * additional optimizations in place. 10 * additional optimizations in place.
11 * 11 *
12 * The library is free for all purposes without any express 12 * The library is free for all purposes without any express
13 * guarantee it works. 13 * guarantee it works.
14 * 14 *
15 * Tom St Denis, [email protected], http://math.libtomcrypt.com 15 * Tom St Denis, [email protected], http://libtom.org
16 */ 16 */
17 17
18 /* trim unused digits 18 /* trim unused digits
19 * 19 *
20 * This is used to ensure that leading zero digits are 20 * This is used to ensure that leading zero digits are
26 mp_clamp (mp_int * a) 26 mp_clamp (mp_int * a)
27 { 27 {
28 /* decrease used while the most significant digit is 28 /* decrease used while the most significant digit is
29 * zero. 29 * zero.
30 */ 30 */
31 while (a->used > 0 && a->dp[a->used - 1] == 0) { 31 while ((a->used > 0) && (a->dp[a->used - 1] == 0)) {
32 --(a->used); 32 --(a->used);
33 } 33 }
34 34
35 /* reset the sign flag if used == 0 */ 35 /* reset the sign flag if used == 0 */
36 if (a->used == 0) { 36 if (a->used == 0) {
37 a->sign = MP_ZPOS; 37 a->sign = MP_ZPOS;
38 } 38 }
39 } 39 }
40 #endif 40 #endif
41 41
42 /* $Source: /cvs/libtom/libtommath/bn_mp_clamp.c,v $ */ 42 /* $Source$ */
43 /* $Revision: 1.3 $ */ 43 /* $Revision$ */
44 /* $Date: 2006/03/31 14:18:44 $ */ 44 /* $Date$ */