1 /* $NetBSD: bn_mp_init_size.c,v 1.1.1.2 2014/04/24 12:45:31 pettai Exp $ */ 2 3 #include <tommath.h> 4 #ifdef BN_MP_INIT_SIZE_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 /* init an mp_init for a given size */ mp_init_size(mp_int * a,int size)21int mp_init_size (mp_int * a, int size) 22 { 23 int x; 24 25 /* pad size so there are always extra digits */ 26 size += (MP_PREC * 2) - (size % MP_PREC); 27 28 /* alloc mem */ 29 a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size); 30 if (a->dp == NULL) { 31 return MP_MEM; 32 } 33 34 /* set the members */ 35 a->used = 0; 36 a->alloc = size; 37 a->sign = MP_ZPOS; 38 39 /* zero the digits */ 40 for (x = 0; x < size; x++) { 41 a->dp[x] = 0; 42 } 43 44 return MP_OKAY; 45 } 46 #endif 47 48 /* Source: /cvs/libtom/libtommath/bn_mp_init_size.c,v */ 49 /* Revision: 1.4 */ 50 /* Date: 2006/12/28 01:25:13 */ 51