38 lines
873 B
C
38 lines
873 B
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@iahu.ca, http://math.libtomcrypt.org
|
|
*/
|
|
#include <tommath.h>
|
|
|
|
/* b = |a|
|
|
*
|
|
* Simple function copies the input and fixes the sign to positive
|
|
*/
|
|
int
|
|
mp_abs (mp_int * a, mp_int * b)
|
|
{
|
|
int res;
|
|
|
|
/* copy a to b */
|
|
if (a != b) {
|
|
if ((res = mp_copy (a, b)) != MP_OKAY) {
|
|
return res;
|
|
}
|
|
}
|
|
|
|
/* force the sign of b to positive */
|
|
b->sign = MP_ZPOS;
|
|
|
|
return MP_OKAY;
|
|
}
|