/* mpi-scan.c  -  MPI functions
 * Modified by No Such Labs. (C) 2015. See README.
 * Modified by S.MG 2017 (removed code that is not used by eucrypt and at the same time so ugly it needs rewrite anyway)
 *
 * This file was originally part of Gnu Privacy Guard (GPG), ver. 1.4.10,
 * SHA256(gnupg-1.4.10.tar.gz):
 *        0bfd74660a2f6cedcf7d8256db4a63c996ffebbcdc2cf54397bfb72878c5a85a
 * (C) 1994-2005 Free Software Foundation, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <stdio.h> 
#include <stdlib.h>

#include "knobs.h"
#include "mpi-internal.h"
#include "longlong.h"


/****************
 * Count the number of zerobits at the low end of A
 * This is used currently by eucrypt's primality tests.
 */
unsigned int
mpi_trailing_zeros( MPI a )
{
    unsigned n, count = 0;

    for(n=0; n < a->nlimbs; n++ ) {
	if( a->d[n] ) {
	    unsigned nn;
	    mpi_limb_t alimb = a->d[n];

	    count_trailing_zeros( nn, alimb );
	    count += nn;
	    break;
	}
	count += BITS_PER_MPI_LIMB;
    }
    return count;

}