1 /* $NetBSD: bn_mp_shrink.c,v 1.2 2017/01/28 21:31:47 christos Exp $ */ 2 3 #include <tommath.h> 4 #ifdef BN_MP_SHRINK_C 5 /* LibTomMath, multiple-precision integer library -- Tom St Denis 6 * 7 * LibTomMath is a library that provides multiple-precision 8 * integer arithmetic as well as number theoretic functionality. 9 * 10 * The library was designed directly after the MPI library by 11 * Michael Fromberger but has been written from scratch with 12 * additional optimizations in place. 13 * 14 * The library is free for all purposes without any express 15 * guarantee it works. 16 * 17 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org 18 */ 19 20 /* shrink a bignum */ mp_shrink(mp_int * a)21int mp_shrink (mp_int * a) 22 { 23 mp_digit *tmp; 24 int used = 1; 25 26 if(a->used > 0) 27 used = a->used; 28 29 if (a->alloc != used) { 30 if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * used)) == NULL) { 31 return MP_MEM; 32 } 33 a->dp = tmp; 34 a->alloc = used; 35 } 36 return MP_OKAY; 37 } 38 #endif 39 40 /* Source: /cvs/libtom/libtommath/bn_mp_shrink.c,v */ 41 /* Revision: 1.4 */ 42 /* Date: 2006/12/28 01:25:13 */ 43