1f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#include <tommath.h> 2f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#ifdef BN_MP_INIT_SIZE_C 3f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* LibTomMath, multiple-precision integer library -- Tom St Denis 4f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 5f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * LibTomMath is a library that provides multiple-precision 6f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * integer arithmetic as well as number theoretic functionality. 7f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 8f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * The library was designed directly after the MPI library by 9f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * Michael Fromberger but has been written from scratch with 10f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * additional optimizations in place. 11f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 12f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * The library is free for all purposes without any express 13f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * guarantee it works. 14f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * 15f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com 16f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project */ 17f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 18f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* init an mp_init for a given size */ 19f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Projectint mp_init_size (mp_int * a, int size) 20f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project{ 21f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project int x; 22f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 23f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project /* pad size so there are always extra digits */ 24f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project size += (MP_PREC * 2) - (size % MP_PREC); 25f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 26f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project /* alloc mem */ 27f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size); 28f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project if (a->dp == NULL) { 29f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return MP_MEM; 30f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 31f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 32f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project /* set the members */ 33f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project a->used = 0; 34f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project a->alloc = size; 35f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project a->sign = MP_ZPOS; 36f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 37f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project /* zero the digits */ 38f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project for (x = 0; x < size; x++) { 39f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project a->dp[x] = 0; 40f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project } 41f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 42f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project return MP_OKAY; 43f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project} 44f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project#endif 45f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project 46f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Source: /cvs/libtom/libtommath/bn_mp_init_size.c,v $ */ 47f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Revision: 1.3 $ */ 48f7fc46c63fdc8f39234fea409b8dbe116d73ebf8The Android Open Source Project/* $Date: 2006/03/31 14:18:44 $ */ 49