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add mp_get_long_long() and mp_set_long_long()

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This commit is contained in:
Steffen Jaeckel 2014-12-10 18:59:31 +01:00
parent f88e6a042a
commit 0e3d3ad29d
3 changed files with 71 additions and 0 deletions
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41
bn_mp_get_long_long.c Normal file
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@ -0,0 +1,41 @@
#include <tommath.h>
#ifdef BN_MP_GET_LONG_LONG_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
*/
/* get the lower unsigned long long of an mp_int, platform dependent */
unsigned long long mp_get_long_long (mp_int * a)
{
int i;
unsigned long long res;
if (a->used == 0) {
return 0;
}
/* get number of digits of the lsb we have to read */
i = MIN(a->used,(int)((sizeof(unsigned long long)*CHAR_BIT+DIGIT_BIT-1)/DIGIT_BIT))-1;
/* get most significant digit of result */
res = DIGIT(a,i);
#if DIGIT_BIT < 64
while (--i >= 0) {
res = (res << DIGIT_BIT) | DIGIT(a,i);
}
#endif
return res;
}
#endif

24
bn_mp_set_long_long.c Normal file
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#include <tommath.h>
#ifdef BN_MP_SET_LONG_LONG_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
*/
/* set a platform dependent unsigned long long int */
MP_SET_XLONG(mp_set_long_long, unsigned long long)
#endif
/* $Source$ */
/* $Revision$ */
/* $Date$ */

6
tommath.h
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@ -245,12 +245,18 @@ int mp_set_int(mp_int *a, unsigned long b);
/* set a platform dependent unsigned long value */
int mp_set_long(mp_int *a, unsigned long b);
/* set a platform dependent unsigned long long value */
int mp_set_long_long(mp_int *a, unsigned long long b);
/* get a 32-bit value */
unsigned long mp_get_int(mp_int * a);
/* get a platform dependent unsigned long value */
unsigned long mp_get_long(mp_int * a);
/* get a platform dependent unsigned long long value */
unsigned long long mp_get_long_long(mp_int * a);
/* initialize and set a digit */
int mp_init_set (mp_int * a, mp_digit b);