denyhosts/clamscan/libclamav/tomsfastmath/bit/fp_rshd.c
2022-10-22 18:41:00 +08:00

41 lines
767 B
C

/* TomsFastMath, a fast ISO C bignum library.
*
* This project is meant to fill in where LibTomMath
* falls short. That is speed ;-)
*
* This project is public domain and free for all purposes.
*
* Tom St Denis, tomstdenis@gmail.com
*/
#include "bignum_fast.h"
void fp_rshd(fp_int *a, int x)
{
int y;
/* too many digits just zero and return */
if (x >= a->used) {
fp_zero(a);
return;
}
/* shift */
for (y = 0; y < a->used - x; y++) {
a->dp[y] = a->dp[y+x];
}
/* zero rest */
for (; y < a->used; y++) {
a->dp[y] = 0;
}
/* decrement count */
a->used -= x;
fp_clamp(a);
}
/* $Source: /cvs/libtom/tomsfastmath/src/bit/fp_rshd.c,v $ */
/* $Revision: 1.1 $ */
/* $Date: 2006/12/31 21:25:53 $ */