49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
|
#include <tommath.h>
|
||
|
|
#ifdef BN_MP_INIT_SIZE_C
|
||
|
|
/* 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@gmail.com, http://libtom.org
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* init an mp_init for a given size */
|
||
|
|
int mp_init_size (mp_int * a, int size)
|
||
|
|
{
|
||
|
|
int x;
|
||
|
|
|
||
|
|
/* pad size so there are always extra digits */
|
||
|
|
size += (MP_PREC * 2) - (size % MP_PREC);
|
||
|
|
|
||
|
|
/* alloc mem */
|
||
|
|
a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * size);
|
||
|
|
if (a->dp == NULL) {
|
||
|
|
return MP_MEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set the members */
|
||
|
|
a->used = 0;
|
||
|
|
a->alloc = size;
|
||
|
|
a->sign = MP_ZPOS;
|
||
|
|
|
||
|
|
/* zero the digits */
|
||
|
|
for (x = 0; x < size; x++) {
|
||
|
|
a->dp[x] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return MP_OKAY;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* $Source$ */
|
||
|
|
/* $Revision: 0.41 $ */
|
||
|
|
/* $Date: 2007-04-18 09:58:18 +0000 $ */
|