| /* LibTomMath, multiple-precision integer library -- Tom St Denis |
| * |
| * LibTomMath is a library that provides multiple-precision |
| * integer arithmetic as well as number theoretic functionality. |
| * |
| * The library was designed directly after the MPI library by |
| * Michael Fromberger but has been written from scratch with |
| * additional optimizations in place. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org |
| */ |
| #include <tommath.h> |
| |
| /* init an mp_init for a given size */ |
| int mp_init_size (mp_int * a, int size) |
| { |
| /* pad size so there are always extra digits */ |
| size += (MP_PREC * 2) - (size % MP_PREC); |
| |
| /* alloc mem */ |
| a->dp = OPT_CAST(mp_digit) XCALLOC (sizeof (mp_digit), size); |
| if (a->dp == NULL) { |
| return MP_MEM; |
| } |
| a->used = 0; |
| a->alloc = size; |
| a->sign = MP_ZPOS; |
| |
| return MP_OKAY; |
| } |