tommath/bn_mp_init.c

47 lines
1.1 KiB
C
Raw Normal View History

#include <tommath_private.h>
2004-10-29 18:07:18 -04:00
#ifdef BN_MP_INIT_C
2003-02-28 11:08:34 -05:00
/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
2003-08-04 21:24:44 -04:00
* LibTomMath is a library that provides multiple-precision
2003-02-28 11:08:34 -05:00
* integer arithmetic as well as number theoretic functionality.
*
2003-08-04 21:24:44 -04:00
* The library was designed directly after the MPI library by
* Michael Fromberger but has been written from scratch with
2003-02-28 11:08:34 -05:00
* additional optimizations in place.
*
* The library is free for all purposes without any express
* guarantee it works.
*
* Tom St Denis, tstdenis82@gmail.com, http://libtom.org
2003-02-28 11:08:34 -05:00
*/
2004-08-09 18:15:59 -04:00
/* init a new mp_int */
2017-08-30 13:07:12 -04:00
int mp_init(mp_int *a)
2003-02-28 11:08:34 -05:00
{
2017-08-30 13:11:35 -04:00
int i;
2004-08-09 18:15:59 -04:00
2017-08-30 13:11:35 -04:00
/* allocate memory required and clear it */
a->dp = OPT_CAST(mp_digit) XMALLOC(sizeof(mp_digit) * MP_PREC);
if (a->dp == NULL) {
return MP_MEM;
}
2003-02-28 11:08:34 -05:00
2017-08-30 13:11:35 -04:00
/* set the digits to zero */
for (i = 0; i < MP_PREC; i++) {
2004-08-09 18:15:59 -04:00
a->dp[i] = 0;
2017-08-30 13:11:35 -04:00
}
2004-08-09 18:15:59 -04:00
2017-08-30 13:11:35 -04:00
/* set the used to zero, allocated digits to the default precision
* and sign to positive */
a->used = 0;
a->alloc = MP_PREC;
a->sign = MP_ZPOS;
2003-02-28 11:08:34 -05:00
2017-08-30 13:11:35 -04:00
return MP_OKAY;
2003-02-28 11:08:34 -05:00
}
2004-10-29 18:07:18 -04:00
#endif
2005-08-01 12:37:28 -04:00
2017-08-28 10:27:26 -04:00
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */