1 #include <tommath.h> 2 #ifdef BN_MP_INIT_SIZE_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 (at) gmail.com, http://math.libtomcrypt.com 16 */ 17 18 /* init an mp_init for a given size */ 19 int mp_init_size (mp_int * a, int size) 20 { 21 int x; 22 23 /* pad size so there are always extra digits */ 24 size += (MP_PREC * 2) - (size % MP_PREC); 25 26 /* alloc mem */ 27 a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size); 28 if (a->dp == NULL) { 29 return MP_MEM; 30 } 31 32 /* set the members */ 33 a->used = 0; 34 a->alloc = size; 35 a->sign = MP_ZPOS; 36 37 /* zero the digits */ 38 for (x = 0; x < size; x++) { 39 a->dp[x] = 0; 40 } 41 42 return MP_OKAY; 43 } 44 #endif 45 46 /* $Source: /cvs/libtom/libtommath/bn_mp_init_size.c,v $ */ 47 /* $Revision: 1.3 $ */ 48 /* $Date: 2006/03/31 14:18:44 $ */ 49
