Shipwright/StormLib/src/libtommath/bn_mp_reduce_setup.c
Nicholas Estelami b3e299dbde Replaced StormLib .lib files with source code.
Some modifications to handle backslashes and forward slashes, along with some optimizations to speed up OTR generation.
2022-06-16 20:35:52 -04:00

35 lines
1001 B
C

#include "tommath.h"
#ifdef BN_MP_REDUCE_SETUP_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
*/
/* pre-calculate the value required for Barrett reduction
* For a given modulus "b" it calulates the value required in "a"
*/
int mp_reduce_setup (mp_int * a, mp_int * b)
{
int res;
if ((res = mp_2expt (a, b->used * 2 * DIGIT_BIT)) != MP_OKAY) {
return res;
}
return mp_div (a, b, a, NULL);
}
#endif
/* $Source: /cvs/libtom/libtommath/bn_mp_reduce_setup.c,v $ */
/* $Revision: 1.4 $ */
/* $Date: 2006/12/28 01:25:13 $ */